import Cartesian2 from "../Core/Cartesian2.js";
|
import Cartesian3 from "../Core/Cartesian3.js";
|
import Cartesian4 from "../Core/Cartesian4.js";
|
import Cartographic from "../Core/Cartographic.js";
|
import defaultValue from "../Core/defaultValue.js";
|
import defined from "../Core/defined.js";
|
import destroyObject from "../Core/destroyObject.js";
|
import DeveloperError from "../Core/DeveloperError.js";
|
import Ellipsoid from "../Core/Ellipsoid.js";
|
import HeadingPitchRoll from "../Core/HeadingPitchRoll.js";
|
import IntersectionTests from "../Core/IntersectionTests.js";
|
import KeyboardEventModifier from "../Core/KeyboardEventModifier.js";
|
import CesiumMath from "../Core/Math.js";
|
import Matrix3 from "../Core/Matrix3.js";
|
import Matrix4 from "../Core/Matrix4.js";
|
import OrthographicFrustum from "../Core/OrthographicFrustum.js";
|
import Plane from "../Core/Plane.js";
|
import Quaternion from "../Core/Quaternion.js";
|
import Ray from "../Core/Ray.js";
|
import TerrainExaggeration from "../Core/TerrainExaggeration.js";
|
import Transforms from "../Core/Transforms.js";
|
import CameraEventAggregator from "./CameraEventAggregator.js";
|
import CameraEventType from "./CameraEventType.js";
|
import MapMode2D from "./MapMode2D.js";
|
import SceneMode from "./SceneMode.js";
|
import SceneTransforms from "./SceneTransforms.js";
|
import TweenCollection from "./TweenCollection.js";
|
|
/**
|
* Modifies the camera position and orientation based on mouse input to a canvas.
|
* @alias ScreenSpaceCameraController
|
* @constructor
|
*
|
* @param {Scene} scene The scene.
|
*/
|
function ScreenSpaceCameraController(scene) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!defined(scene)) {
|
throw new DeveloperError("scene is required.");
|
}
|
//>>includeEnd('debug');
|
|
/**
|
* If true, inputs are allowed conditionally with the flags enableTranslate, enableZoom,
|
* enableRotate, enableTilt, and enableLook. If false, all inputs are disabled.
|
*
|
* NOTE: This setting is for temporary use cases, such as camera flights and
|
* drag-selection of regions (see Picking demo). It is typically set to false at the
|
* start of such events, and set true on completion. To keep inputs disabled
|
* past the end of camera flights, you must use the other booleans (enableTranslate,
|
* enableZoom, enableRotate, enableTilt, and enableLook).
|
* @type {Boolean}
|
* @default true
|
*/
|
this.enableInputs = true;
|
/**
|
* If true, allows the user to pan around the map. If false, the camera stays locked at the current position.
|
* This flag only applies in 2D and Columbus view modes.
|
* @type {Boolean}
|
* @default true
|
*/
|
this.enableTranslate = true;
|
/**
|
* If true, allows the user to zoom in and out. If false, the camera is locked to the current distance from the ellipsoid.
|
* @type {Boolean}
|
* @default true
|
*/
|
this.enableZoom = true;
|
/**
|
* If true, allows the user to rotate the world which translates the user's position.
|
* This flag only applies in 2D and 3D.
|
* @type {Boolean}
|
* @default true
|
*/
|
this.enableRotate = true;
|
/**
|
* If true, allows the user to tilt the camera. If false, the camera is locked to the current heading.
|
* This flag only applies in 3D and Columbus view.
|
* @type {Boolean}
|
* @default true
|
*/
|
this.enableTilt = true;
|
/**
|
* If true, allows the user to use free-look. If false, the camera view direction can only be changed through translating
|
* or rotating. This flag only applies in 3D and Columbus view modes.
|
* @type {Boolean}
|
* @default true
|
*/
|
this.enableLook = true;
|
/**
|
* A parameter in the range <code>[0, 1)</code> used to determine how long
|
* the camera will continue to spin because of inertia.
|
* With value of zero, the camera will have no inertia.
|
* @type {Number}
|
* @default 0.9
|
*/
|
this.inertiaSpin = 0.9;
|
/**
|
* A parameter in the range <code>[0, 1)</code> used to determine how long
|
* the camera will continue to translate because of inertia.
|
* With value of zero, the camera will have no inertia.
|
* @type {Number}
|
* @default 0.9
|
*/
|
this.inertiaTranslate = 0.9;
|
/**
|
* A parameter in the range <code>[0, 1)</code> used to determine how long
|
* the camera will continue to zoom because of inertia.
|
* With value of zero, the camera will have no inertia.
|
* @type {Number}
|
* @default 0.8
|
*/
|
this.inertiaZoom = 0.8;
|
/**
|
* A parameter in the range <code>[0, 1)</code> used to limit the range
|
* of various user inputs to a percentage of the window width/height per animation frame.
|
* This helps keep the camera under control in low-frame-rate situations.
|
* @type {Number}
|
* @default 0.1
|
*/
|
this.maximumMovementRatio = 0.1;
|
/**
|
* Sets the duration, in seconds, of the bounce back animations in 2D and Columbus view.
|
* @type {Number}
|
* @default 3.0
|
*/
|
this.bounceAnimationTime = 3.0;
|
/**
|
* The minimum magnitude, in meters, of the camera position when zooming. Defaults to 1.0.
|
* @type {Number}
|
* @default 1.0
|
*/
|
this.minimumZoomDistance = 1.0;
|
/**
|
* The maximum magnitude, in meters, of the camera position when zooming. Defaults to positive infinity.
|
* @type {Number}
|
* @default {@link Number.POSITIVE_INFINITY}
|
*/
|
this.maximumZoomDistance = Number.POSITIVE_INFINITY;
|
/**
|
* The input that allows the user to pan around the map. This only applies in 2D and Columbus view modes.
|
* <p>
|
* The type came be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
|
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
|
* or an array of any of the preceding.
|
* </p>
|
* @type {CameraEventType|Array|undefined}
|
* @default {@link CameraEventType.LEFT_DRAG}
|
*/
|
this.translateEventTypes = CameraEventType.LEFT_DRAG;
|
/**
|
* The input that allows the user to zoom in/out.
|
* <p>
|
* The type came be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
|
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
|
* or an array of any of the preceding.
|
* </p>
|
* @type {CameraEventType|Array|undefined}
|
* @default [{@link CameraEventType.RIGHT_DRAG}, {@link CameraEventType.WHEEL}, {@link CameraEventType.PINCH}]
|
*/
|
this.zoomEventTypes = [
|
CameraEventType.RIGHT_DRAG,
|
CameraEventType.WHEEL,
|
CameraEventType.PINCH,
|
];
|
/**
|
* The input that allows the user to rotate around the globe or another object. This only applies in 3D and Columbus view modes.
|
* <p>
|
* The type came be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
|
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
|
* or an array of any of the preceding.
|
* </p>
|
* @type {CameraEventType|Array|undefined}
|
* @default {@link CameraEventType.LEFT_DRAG}
|
*/
|
this.rotateEventTypes = CameraEventType.LEFT_DRAG;
|
/**
|
* The input that allows the user to tilt in 3D and Columbus view or twist in 2D.
|
* <p>
|
* The type came be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
|
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
|
* or an array of any of the preceding.
|
* </p>
|
* @type {CameraEventType|Array|undefined}
|
* @default [{@link CameraEventType.MIDDLE_DRAG}, {@link CameraEventType.PINCH}, {
|
* eventType : {@link CameraEventType.LEFT_DRAG},
|
* modifier : {@link KeyboardEventModifier.CTRL}
|
* }, {
|
* eventType : {@link CameraEventType.RIGHT_DRAG},
|
* modifier : {@link KeyboardEventModifier.CTRL}
|
* }]
|
*/
|
this.tiltEventTypes = [
|
CameraEventType.MIDDLE_DRAG,
|
CameraEventType.PINCH,
|
{
|
eventType: CameraEventType.LEFT_DRAG,
|
modifier: KeyboardEventModifier.CTRL,
|
},
|
{
|
eventType: CameraEventType.RIGHT_DRAG,
|
modifier: KeyboardEventModifier.CTRL,
|
},
|
];
|
/**
|
* The input that allows the user to change the direction the camera is viewing. This only applies in 3D and Columbus view modes.
|
* <p>
|
* The type came be a {@link CameraEventType}, <code>undefined</code>, an object with <code>eventType</code>
|
* and <code>modifier</code> properties with types <code>CameraEventType</code> and {@link KeyboardEventModifier},
|
* or an array of any of the preceding.
|
* </p>
|
* @type {CameraEventType|Array|undefined}
|
* @default { eventType : {@link CameraEventType.LEFT_DRAG}, modifier : {@link KeyboardEventModifier.SHIFT} }
|
*/
|
this.lookEventTypes = {
|
eventType: CameraEventType.LEFT_DRAG,
|
modifier: KeyboardEventModifier.SHIFT,
|
};
|
/**
|
* The minimum height the camera must be before picking the terrain instead of the ellipsoid.
|
* @type {Number}
|
* @default 150000.0
|
*/
|
this.minimumPickingTerrainHeight = 150000.0;
|
this._minimumPickingTerrainHeight = this.minimumPickingTerrainHeight;
|
/**
|
* The minimum height the camera must be before testing for collision with terrain.
|
* @type {Number}
|
* @default 15000.0
|
*/
|
this.minimumCollisionTerrainHeight = 15000.0;
|
this._minimumCollisionTerrainHeight = this.minimumCollisionTerrainHeight;
|
/**
|
* The minimum height the camera must be before switching from rotating a track ball to
|
* free look when clicks originate on the sky or in space.
|
* @type {Number}
|
* @default 7500000.0
|
*/
|
this.minimumTrackBallHeight = 7500000.0;
|
this._minimumTrackBallHeight = this.minimumTrackBallHeight;
|
/**
|
* Enables or disables camera collision detection with terrain.
|
* @type {Boolean}
|
* @default true
|
*/
|
this.enableCollisionDetection = true;
|
|
this._scene = scene;
|
this._globe = undefined;
|
this._ellipsoid = undefined;
|
|
this._aggregator = new CameraEventAggregator(scene.canvas);
|
|
this._lastInertiaSpinMovement = undefined;
|
this._lastInertiaZoomMovement = undefined;
|
this._lastInertiaTranslateMovement = undefined;
|
this._lastInertiaTiltMovement = undefined;
|
|
// Zoom disables tilt, spin, and translate inertia
|
// Tilt disables spin and translate inertia
|
this._inertiaDisablers = {
|
_lastInertiaZoomMovement: [
|
"_lastInertiaSpinMovement",
|
"_lastInertiaTranslateMovement",
|
"_lastInertiaTiltMovement",
|
],
|
_lastInertiaTiltMovement: [
|
"_lastInertiaSpinMovement",
|
"_lastInertiaTranslateMovement",
|
],
|
};
|
|
this._tweens = new TweenCollection();
|
this._tween = undefined;
|
|
this._horizontalRotationAxis = undefined;
|
|
this._tiltCenterMousePosition = new Cartesian2(-1.0, -1.0);
|
this._tiltCenter = new Cartesian3();
|
this._rotateMousePosition = new Cartesian2(-1.0, -1.0);
|
this._rotateStartPosition = new Cartesian3();
|
this._strafeStartPosition = new Cartesian3();
|
this._strafeMousePosition = new Cartesian2();
|
this._strafeEndMousePosition = new Cartesian2();
|
this._zoomMouseStart = new Cartesian2(-1.0, -1.0);
|
this._zoomWorldPosition = new Cartesian3();
|
this._useZoomWorldPosition = false;
|
this._tiltCVOffMap = false;
|
this._looking = false;
|
this._rotating = false;
|
this._strafing = false;
|
this._zoomingOnVector = false;
|
this._zoomingUnderground = false;
|
this._rotatingZoom = false;
|
this._adjustedHeightForTerrain = false;
|
this._cameraUnderground = false;
|
|
var projection = scene.mapProjection;
|
this._maxCoord = projection.project(
|
new Cartographic(Math.PI, CesiumMath.PI_OVER_TWO)
|
);
|
|
// Constants, Make any of these public?
|
this._zoomFactor = 5.0;
|
this._rotateFactor = undefined;
|
this._rotateRateRangeAdjustment = undefined;
|
this._maximumRotateRate = 1.77;
|
this._minimumRotateRate = 1.0 / 5000.0;
|
this._minimumZoomRate = 20.0;
|
this._maximumZoomRate = 5906376272000.0; // distance from the Sun to Pluto in meters.
|
this._minimumUndergroundPickDistance = 2000.0;
|
this._maximumUndergroundPickDistance = 10000.0;
|
}
|
|
function decay(time, coefficient) {
|
if (time < 0) {
|
return 0.0;
|
}
|
|
var tau = (1.0 - coefficient) * 25.0;
|
return Math.exp(-tau * time);
|
}
|
|
function sameMousePosition(movement) {
|
return Cartesian2.equalsEpsilon(
|
movement.startPosition,
|
movement.endPosition,
|
CesiumMath.EPSILON14
|
);
|
}
|
|
// If the time between mouse down and mouse up is not between
|
// these thresholds, the camera will not move with inertia.
|
// This value is probably dependent on the browser and/or the
|
// hardware. Should be investigated further.
|
var inertiaMaxClickTimeThreshold = 0.4;
|
|
function maintainInertia(
|
aggregator,
|
type,
|
modifier,
|
decayCoef,
|
action,
|
object,
|
lastMovementName
|
) {
|
var movementState = object[lastMovementName];
|
if (!defined(movementState)) {
|
movementState = object[lastMovementName] = {
|
startPosition: new Cartesian2(),
|
endPosition: new Cartesian2(),
|
motion: new Cartesian2(),
|
inertiaEnabled: true,
|
};
|
}
|
|
var ts = aggregator.getButtonPressTime(type, modifier);
|
var tr = aggregator.getButtonReleaseTime(type, modifier);
|
|
var threshold = ts && tr && (tr.getTime() - ts.getTime()) / 1000.0;
|
var now = new Date();
|
var fromNow = tr && (now.getTime() - tr.getTime()) / 1000.0;
|
|
if (ts && tr && threshold < inertiaMaxClickTimeThreshold) {
|
var d = decay(fromNow, decayCoef);
|
|
var lastMovement = aggregator.getLastMovement(type, modifier);
|
if (
|
!defined(lastMovement) ||
|
sameMousePosition(lastMovement) ||
|
!movementState.inertiaEnabled
|
) {
|
return;
|
}
|
|
movementState.motion.x =
|
(lastMovement.endPosition.x - lastMovement.startPosition.x) * 0.5;
|
movementState.motion.y =
|
(lastMovement.endPosition.y - lastMovement.startPosition.y) * 0.5;
|
|
movementState.startPosition = Cartesian2.clone(
|
lastMovement.startPosition,
|
movementState.startPosition
|
);
|
|
movementState.endPosition = Cartesian2.multiplyByScalar(
|
movementState.motion,
|
d,
|
movementState.endPosition
|
);
|
movementState.endPosition = Cartesian2.add(
|
movementState.startPosition,
|
movementState.endPosition,
|
movementState.endPosition
|
);
|
|
// If value from the decreasing exponential function is close to zero,
|
// the end coordinates may be NaN.
|
if (
|
isNaN(movementState.endPosition.x) ||
|
isNaN(movementState.endPosition.y) ||
|
Cartesian2.distance(
|
movementState.startPosition,
|
movementState.endPosition
|
) < 0.5
|
) {
|
return;
|
}
|
|
if (!aggregator.isButtonDown(type, modifier)) {
|
var startPosition = aggregator.getStartMousePosition(type, modifier);
|
action(object, startPosition, movementState);
|
}
|
}
|
}
|
|
function activateInertia(controller, inertiaStateName) {
|
if (defined(inertiaStateName)) {
|
// Re-enable inertia if it was disabled
|
var movementState = controller[inertiaStateName];
|
if (defined(movementState)) {
|
movementState.inertiaEnabled = true;
|
}
|
// Disable inertia on other movements
|
var inertiasToDisable = controller._inertiaDisablers[inertiaStateName];
|
if (defined(inertiasToDisable)) {
|
var length = inertiasToDisable.length;
|
for (var i = 0; i < length; ++i) {
|
movementState = controller[inertiasToDisable[i]];
|
if (defined(movementState)) {
|
movementState.inertiaEnabled = false;
|
}
|
}
|
}
|
}
|
}
|
|
var scratchEventTypeArray = [];
|
|
function reactToInput(
|
controller,
|
enabled,
|
eventTypes,
|
action,
|
inertiaConstant,
|
inertiaStateName
|
) {
|
if (!defined(eventTypes)) {
|
return;
|
}
|
|
var aggregator = controller._aggregator;
|
|
if (!Array.isArray(eventTypes)) {
|
scratchEventTypeArray[0] = eventTypes;
|
eventTypes = scratchEventTypeArray;
|
}
|
|
var length = eventTypes.length;
|
for (var i = 0; i < length; ++i) {
|
var eventType = eventTypes[i];
|
var type = defined(eventType.eventType) ? eventType.eventType : eventType;
|
var modifier = eventType.modifier;
|
|
var movement =
|
aggregator.isMoving(type, modifier) &&
|
aggregator.getMovement(type, modifier);
|
var startPosition = aggregator.getStartMousePosition(type, modifier);
|
|
if (controller.enableInputs && enabled) {
|
if (movement) {
|
action(controller, startPosition, movement);
|
activateInertia(controller, inertiaStateName);
|
} else if (inertiaConstant < 1.0) {
|
maintainInertia(
|
aggregator,
|
type,
|
modifier,
|
inertiaConstant,
|
action,
|
controller,
|
inertiaStateName
|
);
|
}
|
}
|
}
|
}
|
|
var scratchZoomPickRay = new Ray();
|
var scratchPickCartesian = new Cartesian3();
|
var scratchZoomOffset = new Cartesian2();
|
var scratchZoomDirection = new Cartesian3();
|
var scratchCenterPixel = new Cartesian2();
|
var scratchCenterPosition = new Cartesian3();
|
var scratchPositionNormal = new Cartesian3();
|
var scratchPickNormal = new Cartesian3();
|
var scratchZoomAxis = new Cartesian3();
|
var scratchCameraPositionNormal = new Cartesian3();
|
|
// Scratch variables used in zooming algorithm
|
var scratchTargetNormal = new Cartesian3();
|
var scratchCameraPosition = new Cartesian3();
|
var scratchCameraUpNormal = new Cartesian3();
|
var scratchCameraRightNormal = new Cartesian3();
|
var scratchForwardNormal = new Cartesian3();
|
var scratchPositionToTarget = new Cartesian3();
|
var scratchPositionToTargetNormal = new Cartesian3();
|
var scratchPan = new Cartesian3();
|
var scratchCenterMovement = new Cartesian3();
|
var scratchCenter = new Cartesian3();
|
var scratchCartesian = new Cartesian3();
|
var scratchCartesianTwo = new Cartesian3();
|
var scratchCartesianThree = new Cartesian3();
|
var scratchZoomViewOptions = {
|
orientation: new HeadingPitchRoll(),
|
};
|
|
function handleZoom(
|
object,
|
startPosition,
|
movement,
|
zoomFactor,
|
distanceMeasure,
|
unitPositionDotDirection
|
) {
|
var percentage = 1.0;
|
if (defined(unitPositionDotDirection)) {
|
percentage = CesiumMath.clamp(
|
Math.abs(unitPositionDotDirection),
|
0.25,
|
1.0
|
);
|
}
|
|
// distanceMeasure should be the height above the ellipsoid.
|
// The zoomRate slows as it approaches the surface and stops minimumZoomDistance above it.
|
var minHeight = object.minimumZoomDistance * percentage;
|
var maxHeight = object.maximumZoomDistance;
|
|
var minDistance = distanceMeasure - minHeight;
|
var zoomRate = zoomFactor * minDistance;
|
zoomRate = CesiumMath.clamp(
|
zoomRate,
|
object._minimumZoomRate,
|
object._maximumZoomRate
|
);
|
|
var diff = movement.endPosition.y - movement.startPosition.y;
|
var rangeWindowRatio = diff / object._scene.canvas.clientHeight;
|
rangeWindowRatio = Math.min(rangeWindowRatio, object.maximumMovementRatio);
|
var distance = zoomRate * rangeWindowRatio;
|
|
if (
|
object.enableCollisionDetection ||
|
object.minimumZoomDistance === 0.0 ||
|
!defined(object._globe) // look-at mode
|
) {
|
if (distance > 0.0 && Math.abs(distanceMeasure - minHeight) < 1.0) {
|
return;
|
}
|
|
if (distance < 0.0 && Math.abs(distanceMeasure - maxHeight) < 1.0) {
|
return;
|
}
|
|
if (distanceMeasure - distance < minHeight) {
|
distance = distanceMeasure - minHeight - 1.0;
|
} else if (distanceMeasure - distance > maxHeight) {
|
distance = distanceMeasure - maxHeight;
|
}
|
}
|
|
var scene = object._scene;
|
var camera = scene.camera;
|
var mode = scene.mode;
|
|
var orientation = scratchZoomViewOptions.orientation;
|
orientation.heading = camera.heading;
|
orientation.pitch = camera.pitch;
|
orientation.roll = camera.roll;
|
|
if (camera.frustum instanceof OrthographicFrustum) {
|
if (Math.abs(distance) > 0.0) {
|
camera.zoomIn(distance);
|
camera._adjustOrthographicFrustum();
|
}
|
return;
|
}
|
|
var sameStartPosition = Cartesian2.equals(
|
startPosition,
|
object._zoomMouseStart
|
);
|
var zoomingOnVector = object._zoomingOnVector;
|
var rotatingZoom = object._rotatingZoom;
|
var pickedPosition;
|
|
if (!sameStartPosition) {
|
object._zoomMouseStart = Cartesian2.clone(
|
startPosition,
|
object._zoomMouseStart
|
);
|
|
if (defined(object._globe)) {
|
if (mode === SceneMode.SCENE2D) {
|
pickedPosition = camera.getPickRay(startPosition, scratchZoomPickRay)
|
.origin;
|
pickedPosition = Cartesian3.fromElements(
|
pickedPosition.y,
|
pickedPosition.z,
|
pickedPosition.x
|
);
|
} else {
|
pickedPosition = pickGlobe(object, startPosition, scratchPickCartesian);
|
}
|
}
|
if (defined(pickedPosition)) {
|
object._useZoomWorldPosition = true;
|
object._zoomWorldPosition = Cartesian3.clone(
|
pickedPosition,
|
object._zoomWorldPosition
|
);
|
} else {
|
object._useZoomWorldPosition = false;
|
}
|
|
zoomingOnVector = object._zoomingOnVector = false;
|
rotatingZoom = object._rotatingZoom = false;
|
object._zoomingUnderground = object._cameraUnderground;
|
}
|
|
if (!object._useZoomWorldPosition) {
|
camera.zoomIn(distance);
|
return;
|
}
|
|
var zoomOnVector = mode === SceneMode.COLUMBUS_VIEW;
|
|
if (camera.positionCartographic.height < 2000000) {
|
rotatingZoom = true;
|
}
|
|
if (!sameStartPosition || rotatingZoom) {
|
if (mode === SceneMode.SCENE2D) {
|
var worldPosition = object._zoomWorldPosition;
|
var endPosition = camera.position;
|
|
if (
|
!Cartesian3.equals(worldPosition, endPosition) &&
|
camera.positionCartographic.height < object._maxCoord.x * 2.0
|
) {
|
var savedX = camera.position.x;
|
|
var direction = Cartesian3.subtract(
|
worldPosition,
|
endPosition,
|
scratchZoomDirection
|
);
|
Cartesian3.normalize(direction, direction);
|
|
var d =
|
(Cartesian3.distance(worldPosition, endPosition) * distance) /
|
(camera.getMagnitude() * 0.5);
|
camera.move(direction, d * 0.5);
|
|
if (
|
(camera.position.x < 0.0 && savedX > 0.0) ||
|
(camera.position.x > 0.0 && savedX < 0.0)
|
) {
|
pickedPosition = camera.getPickRay(startPosition, scratchZoomPickRay)
|
.origin;
|
pickedPosition = Cartesian3.fromElements(
|
pickedPosition.y,
|
pickedPosition.z,
|
pickedPosition.x
|
);
|
object._zoomWorldPosition = Cartesian3.clone(
|
pickedPosition,
|
object._zoomWorldPosition
|
);
|
}
|
}
|
} else if (mode === SceneMode.SCENE3D) {
|
var cameraPositionNormal = Cartesian3.normalize(
|
camera.position,
|
scratchCameraPositionNormal
|
);
|
if (
|
object._cameraUnderground ||
|
object._zoomingUnderground ||
|
(camera.positionCartographic.height < 3000.0 &&
|
Math.abs(Cartesian3.dot(camera.direction, cameraPositionNormal)) <
|
0.6)
|
) {
|
zoomOnVector = true;
|
} else {
|
var canvas = scene.canvas;
|
|
var centerPixel = scratchCenterPixel;
|
centerPixel.x = canvas.clientWidth / 2;
|
centerPixel.y = canvas.clientHeight / 2;
|
var centerPosition = pickGlobe(
|
object,
|
centerPixel,
|
scratchCenterPosition
|
);
|
// If centerPosition is not defined, it means the globe does not cover the center position of screen
|
|
if (!defined(centerPosition)) {
|
zoomOnVector = true;
|
} else if (camera.positionCartographic.height < 1000000) {
|
// The math in the else block assumes the camera
|
// points toward the earth surface, so we check it here.
|
// Theoretically, we should check for 90 degree, but it doesn't behave well when parallel
|
// to the earth surface
|
if (Cartesian3.dot(camera.direction, cameraPositionNormal) >= -0.5) {
|
zoomOnVector = true;
|
} else {
|
var cameraPosition = scratchCameraPosition;
|
Cartesian3.clone(camera.position, cameraPosition);
|
var target = object._zoomWorldPosition;
|
|
var targetNormal = scratchTargetNormal;
|
|
targetNormal = Cartesian3.normalize(target, targetNormal);
|
|
if (Cartesian3.dot(targetNormal, cameraPositionNormal) < 0.0) {
|
return;
|
}
|
|
var center = scratchCenter;
|
var forward = scratchForwardNormal;
|
Cartesian3.clone(camera.direction, forward);
|
Cartesian3.add(
|
cameraPosition,
|
Cartesian3.multiplyByScalar(forward, 1000, scratchCartesian),
|
center
|
);
|
|
var positionToTarget = scratchPositionToTarget;
|
var positionToTargetNormal = scratchPositionToTargetNormal;
|
Cartesian3.subtract(target, cameraPosition, positionToTarget);
|
|
Cartesian3.normalize(positionToTarget, positionToTargetNormal);
|
|
var alphaDot = Cartesian3.dot(
|
cameraPositionNormal,
|
positionToTargetNormal
|
);
|
if (alphaDot >= 0.0) {
|
// We zoomed past the target, and this zoom is not valid anymore.
|
// This line causes the next zoom movement to pick a new starting point.
|
object._zoomMouseStart.x = -1;
|
return;
|
}
|
var alpha = Math.acos(-alphaDot);
|
var cameraDistance = Cartesian3.magnitude(cameraPosition);
|
var targetDistance = Cartesian3.magnitude(target);
|
var remainingDistance = cameraDistance - distance;
|
var positionToTargetDistance = Cartesian3.magnitude(
|
positionToTarget
|
);
|
|
var gamma = Math.asin(
|
CesiumMath.clamp(
|
(positionToTargetDistance / targetDistance) * Math.sin(alpha),
|
-1.0,
|
1.0
|
)
|
);
|
var delta = Math.asin(
|
CesiumMath.clamp(
|
(remainingDistance / targetDistance) * Math.sin(alpha),
|
-1.0,
|
1.0
|
)
|
);
|
var beta = gamma - delta + alpha;
|
|
var up = scratchCameraUpNormal;
|
Cartesian3.normalize(cameraPosition, up);
|
var right = scratchCameraRightNormal;
|
right = Cartesian3.cross(positionToTargetNormal, up, right);
|
right = Cartesian3.normalize(right, right);
|
|
Cartesian3.normalize(
|
Cartesian3.cross(up, right, scratchCartesian),
|
forward
|
);
|
|
// Calculate new position to move to
|
Cartesian3.multiplyByScalar(
|
Cartesian3.normalize(center, scratchCartesian),
|
Cartesian3.magnitude(center) - distance,
|
center
|
);
|
Cartesian3.normalize(cameraPosition, cameraPosition);
|
Cartesian3.multiplyByScalar(
|
cameraPosition,
|
remainingDistance,
|
cameraPosition
|
);
|
|
// Pan
|
var pMid = scratchPan;
|
Cartesian3.multiplyByScalar(
|
Cartesian3.add(
|
Cartesian3.multiplyByScalar(
|
up,
|
Math.cos(beta) - 1,
|
scratchCartesianTwo
|
),
|
Cartesian3.multiplyByScalar(
|
forward,
|
Math.sin(beta),
|
scratchCartesianThree
|
),
|
scratchCartesian
|
),
|
remainingDistance,
|
pMid
|
);
|
Cartesian3.add(cameraPosition, pMid, cameraPosition);
|
|
Cartesian3.normalize(center, up);
|
Cartesian3.normalize(
|
Cartesian3.cross(up, right, scratchCartesian),
|
forward
|
);
|
|
var cMid = scratchCenterMovement;
|
Cartesian3.multiplyByScalar(
|
Cartesian3.add(
|
Cartesian3.multiplyByScalar(
|
up,
|
Math.cos(beta) - 1,
|
scratchCartesianTwo
|
),
|
Cartesian3.multiplyByScalar(
|
forward,
|
Math.sin(beta),
|
scratchCartesianThree
|
),
|
scratchCartesian
|
),
|
Cartesian3.magnitude(center),
|
cMid
|
);
|
Cartesian3.add(center, cMid, center);
|
|
// Update camera
|
|
// Set new position
|
Cartesian3.clone(cameraPosition, camera.position);
|
|
// Set new direction
|
Cartesian3.normalize(
|
Cartesian3.subtract(center, cameraPosition, scratchCartesian),
|
camera.direction
|
);
|
Cartesian3.clone(camera.direction, camera.direction);
|
|
// Set new right & up vectors
|
Cartesian3.cross(camera.direction, camera.up, camera.right);
|
Cartesian3.cross(camera.right, camera.direction, camera.up);
|
|
camera.setView(scratchZoomViewOptions);
|
return;
|
}
|
} else {
|
var positionNormal = Cartesian3.normalize(
|
centerPosition,
|
scratchPositionNormal
|
);
|
var pickedNormal = Cartesian3.normalize(
|
object._zoomWorldPosition,
|
scratchPickNormal
|
);
|
var dotProduct = Cartesian3.dot(pickedNormal, positionNormal);
|
|
if (dotProduct > 0.0 && dotProduct < 1.0) {
|
var angle = CesiumMath.acosClamped(dotProduct);
|
var axis = Cartesian3.cross(
|
pickedNormal,
|
positionNormal,
|
scratchZoomAxis
|
);
|
|
var denom =
|
Math.abs(angle) > CesiumMath.toRadians(20.0)
|
? camera.positionCartographic.height * 0.75
|
: camera.positionCartographic.height - distance;
|
var scalar = distance / denom;
|
camera.rotate(axis, angle * scalar);
|
}
|
}
|
}
|
}
|
|
object._rotatingZoom = !zoomOnVector;
|
}
|
|
if ((!sameStartPosition && zoomOnVector) || zoomingOnVector) {
|
var ray;
|
var zoomMouseStart = SceneTransforms.wgs84ToWindowCoordinates(
|
scene,
|
object._zoomWorldPosition,
|
scratchZoomOffset
|
);
|
if (
|
mode !== SceneMode.COLUMBUS_VIEW &&
|
Cartesian2.equals(startPosition, object._zoomMouseStart) &&
|
defined(zoomMouseStart)
|
) {
|
ray = camera.getPickRay(zoomMouseStart, scratchZoomPickRay);
|
} else {
|
ray = camera.getPickRay(startPosition, scratchZoomPickRay);
|
}
|
|
var rayDirection = ray.direction;
|
if (mode === SceneMode.COLUMBUS_VIEW || mode === SceneMode.SCENE2D) {
|
Cartesian3.fromElements(
|
rayDirection.y,
|
rayDirection.z,
|
rayDirection.x,
|
rayDirection
|
);
|
}
|
|
camera.move(rayDirection, distance);
|
|
object._zoomingOnVector = true;
|
} else {
|
camera.zoomIn(distance);
|
}
|
|
if (!object._cameraUnderground) {
|
camera.setView(scratchZoomViewOptions);
|
}
|
}
|
|
var translate2DStart = new Ray();
|
var translate2DEnd = new Ray();
|
var scratchTranslateP0 = new Cartesian3();
|
|
function translate2D(controller, startPosition, movement) {
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var start = camera.getPickRay(movement.startPosition, translate2DStart)
|
.origin;
|
var end = camera.getPickRay(movement.endPosition, translate2DEnd).origin;
|
|
start = Cartesian3.fromElements(start.y, start.z, start.x, start);
|
end = Cartesian3.fromElements(end.y, end.z, end.x, end);
|
|
var direction = Cartesian3.subtract(start, end, scratchTranslateP0);
|
var distance = Cartesian3.magnitude(direction);
|
|
if (distance > 0.0) {
|
Cartesian3.normalize(direction, direction);
|
camera.move(direction, distance);
|
}
|
}
|
|
function zoom2D(controller, startPosition, movement) {
|
if (defined(movement.distance)) {
|
movement = movement.distance;
|
}
|
|
var scene = controller._scene;
|
var camera = scene.camera;
|
|
handleZoom(
|
controller,
|
startPosition,
|
movement,
|
controller._zoomFactor,
|
camera.getMagnitude()
|
);
|
}
|
|
var twist2DStart = new Cartesian2();
|
var twist2DEnd = new Cartesian2();
|
|
function twist2D(controller, startPosition, movement) {
|
if (defined(movement.angleAndHeight)) {
|
singleAxisTwist2D(controller, startPosition, movement.angleAndHeight);
|
return;
|
}
|
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var canvas = scene.canvas;
|
var width = canvas.clientWidth;
|
var height = canvas.clientHeight;
|
|
var start = twist2DStart;
|
start.x = (2.0 / width) * movement.startPosition.x - 1.0;
|
start.y = (2.0 / height) * (height - movement.startPosition.y) - 1.0;
|
start = Cartesian2.normalize(start, start);
|
|
var end = twist2DEnd;
|
end.x = (2.0 / width) * movement.endPosition.x - 1.0;
|
end.y = (2.0 / height) * (height - movement.endPosition.y) - 1.0;
|
end = Cartesian2.normalize(end, end);
|
|
var startTheta = CesiumMath.acosClamped(start.x);
|
if (start.y < 0) {
|
startTheta = CesiumMath.TWO_PI - startTheta;
|
}
|
var endTheta = CesiumMath.acosClamped(end.x);
|
if (end.y < 0) {
|
endTheta = CesiumMath.TWO_PI - endTheta;
|
}
|
var theta = endTheta - startTheta;
|
|
camera.twistRight(theta);
|
}
|
|
function singleAxisTwist2D(controller, startPosition, movement) {
|
var rotateRate =
|
controller._rotateFactor * controller._rotateRateRangeAdjustment;
|
|
if (rotateRate > controller._maximumRotateRate) {
|
rotateRate = controller._maximumRotateRate;
|
}
|
|
if (rotateRate < controller._minimumRotateRate) {
|
rotateRate = controller._minimumRotateRate;
|
}
|
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var canvas = scene.canvas;
|
|
var phiWindowRatio =
|
(movement.endPosition.x - movement.startPosition.x) / canvas.clientWidth;
|
phiWindowRatio = Math.min(phiWindowRatio, controller.maximumMovementRatio);
|
|
var deltaPhi = rotateRate * phiWindowRatio * Math.PI * 4.0;
|
|
camera.twistRight(deltaPhi);
|
}
|
|
function update2D(controller) {
|
var rotatable2D = controller._scene.mapMode2D === MapMode2D.ROTATE;
|
if (!Matrix4.equals(Matrix4.IDENTITY, controller._scene.camera.transform)) {
|
reactToInput(
|
controller,
|
controller.enableZoom,
|
controller.zoomEventTypes,
|
zoom2D,
|
controller.inertiaZoom,
|
"_lastInertiaZoomMovement"
|
);
|
if (rotatable2D) {
|
reactToInput(
|
controller,
|
controller.enableRotate,
|
controller.translateEventTypes,
|
twist2D,
|
controller.inertiaSpin,
|
"_lastInertiaSpinMovement"
|
);
|
}
|
} else {
|
reactToInput(
|
controller,
|
controller.enableTranslate,
|
controller.translateEventTypes,
|
translate2D,
|
controller.inertiaTranslate,
|
"_lastInertiaTranslateMovement"
|
);
|
reactToInput(
|
controller,
|
controller.enableZoom,
|
controller.zoomEventTypes,
|
zoom2D,
|
controller.inertiaZoom,
|
"_lastInertiaZoomMovement"
|
);
|
if (rotatable2D) {
|
reactToInput(
|
controller,
|
controller.enableRotate,
|
controller.tiltEventTypes,
|
twist2D,
|
controller.inertiaSpin,
|
"_lastInertiaTiltMovement"
|
);
|
}
|
}
|
}
|
|
var pickGlobeScratchRay = new Ray();
|
var scratchDepthIntersection = new Cartesian3();
|
var scratchRayIntersection = new Cartesian3();
|
|
function pickGlobe(controller, mousePosition, result) {
|
var scene = controller._scene;
|
var globe = controller._globe;
|
var camera = scene.camera;
|
|
if (!defined(globe)) {
|
return undefined;
|
}
|
|
var cullBackFaces = !controller._cameraUnderground;
|
|
var depthIntersection;
|
if (scene.pickPositionSupported) {
|
depthIntersection = scene.pickPositionWorldCoordinates(
|
mousePosition,
|
scratchDepthIntersection
|
);
|
}
|
|
var ray = camera.getPickRay(mousePosition, pickGlobeScratchRay);
|
var rayIntersection = globe.pickWorldCoordinates(
|
ray,
|
scene,
|
cullBackFaces,
|
scratchRayIntersection
|
);
|
|
var pickDistance = defined(depthIntersection)
|
? Cartesian3.distance(depthIntersection, camera.positionWC)
|
: Number.POSITIVE_INFINITY;
|
var rayDistance = defined(rayIntersection)
|
? Cartesian3.distance(rayIntersection, camera.positionWC)
|
: Number.POSITIVE_INFINITY;
|
|
if (pickDistance < rayDistance) {
|
return Cartesian3.clone(depthIntersection, result);
|
}
|
|
return Cartesian3.clone(rayIntersection, result);
|
}
|
|
var scratchDistanceCartographic = new Cartographic();
|
|
function getDistanceFromSurface(controller) {
|
var ellipsoid = controller._ellipsoid;
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var mode = scene.mode;
|
|
var height = 0.0;
|
if (mode === SceneMode.SCENE3D) {
|
var cartographic = ellipsoid.cartesianToCartographic(
|
camera.position,
|
scratchDistanceCartographic
|
);
|
if (defined(cartographic)) {
|
height = cartographic.height;
|
}
|
} else {
|
height = camera.position.z;
|
}
|
var globeHeight = defaultValue(controller._scene.globeHeight, 0.0);
|
var distanceFromSurface = Math.abs(globeHeight - height);
|
return distanceFromSurface;
|
}
|
|
var scratchSurfaceNormal = new Cartesian3();
|
|
function getZoomDistanceUnderground(controller, ray) {
|
var origin = ray.origin;
|
var direction = ray.direction;
|
var distanceFromSurface = getDistanceFromSurface(controller);
|
|
// Weight zoom distance based on how strongly the pick ray is pointing inward.
|
// Geocentric normal is accurate enough for these purposes
|
var surfaceNormal = Cartesian3.normalize(origin, scratchSurfaceNormal);
|
var strength = Math.abs(Cartesian3.dot(surfaceNormal, direction));
|
strength = Math.max(strength, 0.5) * 2.0;
|
return distanceFromSurface * strength;
|
}
|
|
function getTiltCenterUnderground(controller, ray, pickedPosition, result) {
|
var distance = Cartesian3.distance(ray.origin, pickedPosition);
|
var distanceFromSurface = getDistanceFromSurface(controller);
|
|
var maximumDistance = CesiumMath.clamp(
|
distanceFromSurface * 5.0,
|
controller._minimumUndergroundPickDistance,
|
controller._maximumUndergroundPickDistance
|
);
|
|
if (distance > maximumDistance) {
|
// Simulate look-at behavior by tilting around a small invisible sphere
|
distance = Math.min(distance, distanceFromSurface / 5.0);
|
distance = Math.max(distance, 100.0);
|
}
|
|
return Ray.getPoint(ray, distance, result);
|
}
|
|
function getStrafeStartPositionUnderground(
|
controller,
|
ray,
|
pickedPosition,
|
result
|
) {
|
var distance;
|
if (!defined(pickedPosition)) {
|
distance = getDistanceFromSurface(controller);
|
} else {
|
distance = Cartesian3.distance(ray.origin, pickedPosition);
|
if (distance > controller._maximumUndergroundPickDistance) {
|
// If the picked position is too far away set the strafe speed based on the
|
// camera's height from the globe surface
|
distance = getDistanceFromSurface(controller);
|
}
|
}
|
|
return Ray.getPoint(ray, distance, result);
|
}
|
|
var scratchInertialDelta = new Cartesian2();
|
|
function continueStrafing(controller, movement) {
|
// Update the end position continually based on the inertial delta
|
var originalEndPosition = movement.endPosition;
|
var inertialDelta = Cartesian2.subtract(
|
movement.endPosition,
|
movement.startPosition,
|
scratchInertialDelta
|
);
|
var endPosition = controller._strafeEndMousePosition;
|
Cartesian2.add(endPosition, inertialDelta, endPosition);
|
movement.endPosition = endPosition;
|
strafe(controller, movement, controller._strafeStartPosition);
|
movement.endPosition = originalEndPosition;
|
}
|
|
var translateCVStartRay = new Ray();
|
var translateCVEndRay = new Ray();
|
var translateCVStartPos = new Cartesian3();
|
var translateCVEndPos = new Cartesian3();
|
var translateCVDifference = new Cartesian3();
|
var translateCVOrigin = new Cartesian3();
|
var translateCVPlane = new Plane(Cartesian3.UNIT_X, 0.0);
|
var translateCVStartMouse = new Cartesian2();
|
var translateCVEndMouse = new Cartesian2();
|
|
function translateCV(controller, startPosition, movement) {
|
if (!Cartesian3.equals(startPosition, controller._translateMousePosition)) {
|
controller._looking = false;
|
}
|
|
if (!Cartesian3.equals(startPosition, controller._strafeMousePosition)) {
|
controller._strafing = false;
|
}
|
|
if (controller._looking) {
|
look3D(controller, startPosition, movement);
|
return;
|
}
|
|
if (controller._strafing) {
|
continueStrafing(controller, movement);
|
return;
|
}
|
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var cameraUnderground = controller._cameraUnderground;
|
var startMouse = Cartesian2.clone(
|
movement.startPosition,
|
translateCVStartMouse
|
);
|
var endMouse = Cartesian2.clone(movement.endPosition, translateCVEndMouse);
|
var startRay = camera.getPickRay(startMouse, translateCVStartRay);
|
|
var origin = Cartesian3.clone(Cartesian3.ZERO, translateCVOrigin);
|
var normal = Cartesian3.UNIT_X;
|
|
var globePos;
|
if (camera.position.z < controller._minimumPickingTerrainHeight) {
|
globePos = pickGlobe(controller, startMouse, translateCVStartPos);
|
if (defined(globePos)) {
|
origin.x = globePos.x;
|
}
|
}
|
|
if (
|
cameraUnderground ||
|
(origin.x > camera.position.z && defined(globePos))
|
) {
|
var pickPosition = globePos;
|
if (cameraUnderground) {
|
pickPosition = getStrafeStartPositionUnderground(
|
controller,
|
startRay,
|
globePos,
|
translateCVStartPos
|
);
|
}
|
Cartesian2.clone(startPosition, controller._strafeMousePosition);
|
Cartesian2.clone(startPosition, controller._strafeEndMousePosition);
|
Cartesian3.clone(pickPosition, controller._strafeStartPosition);
|
controller._strafing = true;
|
strafe(controller, movement, controller._strafeStartPosition);
|
return;
|
}
|
|
var plane = Plane.fromPointNormal(origin, normal, translateCVPlane);
|
|
startRay = camera.getPickRay(startMouse, translateCVStartRay);
|
var startPlanePos = IntersectionTests.rayPlane(
|
startRay,
|
plane,
|
translateCVStartPos
|
);
|
|
var endRay = camera.getPickRay(endMouse, translateCVEndRay);
|
var endPlanePos = IntersectionTests.rayPlane(
|
endRay,
|
plane,
|
translateCVEndPos
|
);
|
|
if (!defined(startPlanePos) || !defined(endPlanePos)) {
|
controller._looking = true;
|
look3D(controller, startPosition, movement);
|
Cartesian2.clone(startPosition, controller._translateMousePosition);
|
return;
|
}
|
|
var diff = Cartesian3.subtract(
|
startPlanePos,
|
endPlanePos,
|
translateCVDifference
|
);
|
var temp = diff.x;
|
diff.x = diff.y;
|
diff.y = diff.z;
|
diff.z = temp;
|
var mag = Cartesian3.magnitude(diff);
|
if (mag > CesiumMath.EPSILON6) {
|
Cartesian3.normalize(diff, diff);
|
camera.move(diff, mag);
|
}
|
}
|
|
var rotateCVWindowPos = new Cartesian2();
|
var rotateCVWindowRay = new Ray();
|
var rotateCVCenter = new Cartesian3();
|
var rotateCVVerticalCenter = new Cartesian3();
|
var rotateCVTransform = new Matrix4();
|
var rotateCVVerticalTransform = new Matrix4();
|
var rotateCVOrigin = new Cartesian3();
|
var rotateCVPlane = new Plane(Cartesian3.UNIT_X, 0.0);
|
var rotateCVCartesian3 = new Cartesian3();
|
var rotateCVCart = new Cartographic();
|
var rotateCVOldTransform = new Matrix4();
|
var rotateCVQuaternion = new Quaternion();
|
var rotateCVMatrix = new Matrix3();
|
var tilt3DCartesian3 = new Cartesian3();
|
|
function rotateCV(controller, startPosition, movement) {
|
if (defined(movement.angleAndHeight)) {
|
movement = movement.angleAndHeight;
|
}
|
|
if (!Cartesian2.equals(startPosition, controller._tiltCenterMousePosition)) {
|
controller._tiltCVOffMap = false;
|
controller._looking = false;
|
}
|
|
if (controller._looking) {
|
look3D(controller, startPosition, movement);
|
return;
|
}
|
|
var scene = controller._scene;
|
var camera = scene.camera;
|
|
if (
|
controller._tiltCVOffMap ||
|
!controller.onMap() ||
|
Math.abs(camera.position.z) > controller._minimumPickingTerrainHeight
|
) {
|
controller._tiltCVOffMap = true;
|
rotateCVOnPlane(controller, startPosition, movement);
|
} else {
|
rotateCVOnTerrain(controller, startPosition, movement);
|
}
|
}
|
|
function rotateCVOnPlane(controller, startPosition, movement) {
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var canvas = scene.canvas;
|
|
var windowPosition = rotateCVWindowPos;
|
windowPosition.x = canvas.clientWidth / 2;
|
windowPosition.y = canvas.clientHeight / 2;
|
var ray = camera.getPickRay(windowPosition, rotateCVWindowRay);
|
var normal = Cartesian3.UNIT_X;
|
|
var position = ray.origin;
|
var direction = ray.direction;
|
var scalar;
|
var normalDotDirection = Cartesian3.dot(normal, direction);
|
if (Math.abs(normalDotDirection) > CesiumMath.EPSILON6) {
|
scalar = -Cartesian3.dot(normal, position) / normalDotDirection;
|
}
|
|
if (!defined(scalar) || scalar <= 0.0) {
|
controller._looking = true;
|
look3D(controller, startPosition, movement);
|
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
|
return;
|
}
|
|
var center = Cartesian3.multiplyByScalar(direction, scalar, rotateCVCenter);
|
Cartesian3.add(position, center, center);
|
|
var projection = scene.mapProjection;
|
var ellipsoid = projection.ellipsoid;
|
|
Cartesian3.fromElements(center.y, center.z, center.x, center);
|
var cart = projection.unproject(center, rotateCVCart);
|
ellipsoid.cartographicToCartesian(cart, center);
|
|
var transform = Transforms.eastNorthUpToFixedFrame(
|
center,
|
ellipsoid,
|
rotateCVTransform
|
);
|
|
var oldGlobe = controller._globe;
|
var oldEllipsoid = controller._ellipsoid;
|
controller._globe = undefined;
|
controller._ellipsoid = Ellipsoid.UNIT_SPHERE;
|
controller._rotateFactor = 1.0;
|
controller._rotateRateRangeAdjustment = 1.0;
|
|
var oldTransform = Matrix4.clone(camera.transform, rotateCVOldTransform);
|
camera._setTransform(transform);
|
|
rotate3D(controller, startPosition, movement, Cartesian3.UNIT_Z);
|
|
camera._setTransform(oldTransform);
|
controller._globe = oldGlobe;
|
controller._ellipsoid = oldEllipsoid;
|
|
var radius = oldEllipsoid.maximumRadius;
|
controller._rotateFactor = 1.0 / radius;
|
controller._rotateRateRangeAdjustment = radius;
|
}
|
|
function rotateCVOnTerrain(controller, startPosition, movement) {
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var cameraUnderground = controller._cameraUnderground;
|
|
var center;
|
var ray;
|
var normal = Cartesian3.UNIT_X;
|
|
if (Cartesian2.equals(startPosition, controller._tiltCenterMousePosition)) {
|
center = Cartesian3.clone(controller._tiltCenter, rotateCVCenter);
|
} else {
|
if (camera.position.z < controller._minimumPickingTerrainHeight) {
|
center = pickGlobe(controller, startPosition, rotateCVCenter);
|
}
|
|
if (!defined(center)) {
|
ray = camera.getPickRay(startPosition, rotateCVWindowRay);
|
var position = ray.origin;
|
var direction = ray.direction;
|
|
var scalar;
|
var normalDotDirection = Cartesian3.dot(normal, direction);
|
if (Math.abs(normalDotDirection) > CesiumMath.EPSILON6) {
|
scalar = -Cartesian3.dot(normal, position) / normalDotDirection;
|
}
|
|
if (!defined(scalar) || scalar <= 0.0) {
|
controller._looking = true;
|
look3D(controller, startPosition, movement);
|
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
|
return;
|
}
|
|
center = Cartesian3.multiplyByScalar(direction, scalar, rotateCVCenter);
|
Cartesian3.add(position, center, center);
|
}
|
|
if (cameraUnderground) {
|
if (!defined(ray)) {
|
ray = camera.getPickRay(startPosition, rotateCVWindowRay);
|
}
|
getTiltCenterUnderground(controller, ray, center, center);
|
}
|
|
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
|
Cartesian3.clone(center, controller._tiltCenter);
|
}
|
|
var canvas = scene.canvas;
|
|
var windowPosition = rotateCVWindowPos;
|
windowPosition.x = canvas.clientWidth / 2;
|
windowPosition.y = controller._tiltCenterMousePosition.y;
|
ray = camera.getPickRay(windowPosition, rotateCVWindowRay);
|
|
var origin = Cartesian3.clone(Cartesian3.ZERO, rotateCVOrigin);
|
origin.x = center.x;
|
|
var plane = Plane.fromPointNormal(origin, normal, rotateCVPlane);
|
var verticalCenter = IntersectionTests.rayPlane(
|
ray,
|
plane,
|
rotateCVVerticalCenter
|
);
|
|
var projection = camera._projection;
|
var ellipsoid = projection.ellipsoid;
|
|
Cartesian3.fromElements(center.y, center.z, center.x, center);
|
var cart = projection.unproject(center, rotateCVCart);
|
ellipsoid.cartographicToCartesian(cart, center);
|
|
var transform = Transforms.eastNorthUpToFixedFrame(
|
center,
|
ellipsoid,
|
rotateCVTransform
|
);
|
|
var verticalTransform;
|
if (defined(verticalCenter)) {
|
Cartesian3.fromElements(
|
verticalCenter.y,
|
verticalCenter.z,
|
verticalCenter.x,
|
verticalCenter
|
);
|
cart = projection.unproject(verticalCenter, rotateCVCart);
|
ellipsoid.cartographicToCartesian(cart, verticalCenter);
|
|
verticalTransform = Transforms.eastNorthUpToFixedFrame(
|
verticalCenter,
|
ellipsoid,
|
rotateCVVerticalTransform
|
);
|
} else {
|
verticalTransform = transform;
|
}
|
|
var oldGlobe = controller._globe;
|
var oldEllipsoid = controller._ellipsoid;
|
controller._globe = undefined;
|
controller._ellipsoid = Ellipsoid.UNIT_SPHERE;
|
controller._rotateFactor = 1.0;
|
controller._rotateRateRangeAdjustment = 1.0;
|
|
var constrainedAxis = Cartesian3.UNIT_Z;
|
|
var oldTransform = Matrix4.clone(camera.transform, rotateCVOldTransform);
|
camera._setTransform(transform);
|
|
var tangent = Cartesian3.cross(
|
Cartesian3.UNIT_Z,
|
Cartesian3.normalize(camera.position, rotateCVCartesian3),
|
rotateCVCartesian3
|
);
|
var dot = Cartesian3.dot(camera.right, tangent);
|
|
rotate3D(controller, startPosition, movement, constrainedAxis, false, true);
|
|
camera._setTransform(verticalTransform);
|
if (dot < 0.0) {
|
var movementDelta = movement.startPosition.y - movement.endPosition.y;
|
if (
|
(cameraUnderground && movementDelta < 0.0) ||
|
(!cameraUnderground && movementDelta > 0.0)
|
) {
|
// Prevent camera from flipping past the up axis
|
constrainedAxis = undefined;
|
}
|
|
var oldConstrainedAxis = camera.constrainedAxis;
|
camera.constrainedAxis = undefined;
|
|
rotate3D(controller, startPosition, movement, constrainedAxis, true, false);
|
|
camera.constrainedAxis = oldConstrainedAxis;
|
} else {
|
rotate3D(controller, startPosition, movement, constrainedAxis, true, false);
|
}
|
|
if (defined(camera.constrainedAxis)) {
|
var right = Cartesian3.cross(
|
camera.direction,
|
camera.constrainedAxis,
|
tilt3DCartesian3
|
);
|
if (
|
!Cartesian3.equalsEpsilon(right, Cartesian3.ZERO, CesiumMath.EPSILON6)
|
) {
|
if (Cartesian3.dot(right, camera.right) < 0.0) {
|
Cartesian3.negate(right, right);
|
}
|
|
Cartesian3.cross(right, camera.direction, camera.up);
|
Cartesian3.cross(camera.direction, camera.up, camera.right);
|
|
Cartesian3.normalize(camera.up, camera.up);
|
Cartesian3.normalize(camera.right, camera.right);
|
}
|
}
|
|
camera._setTransform(oldTransform);
|
controller._globe = oldGlobe;
|
controller._ellipsoid = oldEllipsoid;
|
|
var radius = oldEllipsoid.maximumRadius;
|
controller._rotateFactor = 1.0 / radius;
|
controller._rotateRateRangeAdjustment = radius;
|
|
var originalPosition = Cartesian3.clone(
|
camera.positionWC,
|
rotateCVCartesian3
|
);
|
|
if (controller.enableCollisionDetection) {
|
adjustHeightForTerrain(controller);
|
}
|
|
if (!Cartesian3.equals(camera.positionWC, originalPosition)) {
|
camera._setTransform(verticalTransform);
|
camera.worldToCameraCoordinatesPoint(originalPosition, originalPosition);
|
|
var magSqrd = Cartesian3.magnitudeSquared(originalPosition);
|
if (Cartesian3.magnitudeSquared(camera.position) > magSqrd) {
|
Cartesian3.normalize(camera.position, camera.position);
|
Cartesian3.multiplyByScalar(
|
camera.position,
|
Math.sqrt(magSqrd),
|
camera.position
|
);
|
}
|
|
var angle = Cartesian3.angleBetween(originalPosition, camera.position);
|
var axis = Cartesian3.cross(
|
originalPosition,
|
camera.position,
|
originalPosition
|
);
|
Cartesian3.normalize(axis, axis);
|
|
var quaternion = Quaternion.fromAxisAngle(axis, angle, rotateCVQuaternion);
|
var rotation = Matrix3.fromQuaternion(quaternion, rotateCVMatrix);
|
Matrix3.multiplyByVector(rotation, camera.direction, camera.direction);
|
Matrix3.multiplyByVector(rotation, camera.up, camera.up);
|
Cartesian3.cross(camera.direction, camera.up, camera.right);
|
Cartesian3.cross(camera.right, camera.direction, camera.up);
|
|
camera._setTransform(oldTransform);
|
}
|
}
|
|
var zoomCVWindowPos = new Cartesian2();
|
var zoomCVWindowRay = new Ray();
|
var zoomCVIntersection = new Cartesian3();
|
|
function zoomCV(controller, startPosition, movement) {
|
if (defined(movement.distance)) {
|
movement = movement.distance;
|
}
|
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var canvas = scene.canvas;
|
|
var cameraUnderground = controller._cameraUnderground;
|
|
var windowPosition;
|
|
if (cameraUnderground) {
|
windowPosition = startPosition;
|
} else {
|
windowPosition = zoomCVWindowPos;
|
windowPosition.x = canvas.clientWidth / 2;
|
windowPosition.y = canvas.clientHeight / 2;
|
}
|
|
var ray = camera.getPickRay(windowPosition, zoomCVWindowRay);
|
var position = ray.origin;
|
var direction = ray.direction;
|
var height = camera.position.z;
|
|
var intersection;
|
if (height < controller._minimumPickingTerrainHeight) {
|
intersection = pickGlobe(controller, windowPosition, zoomCVIntersection);
|
}
|
|
var distance;
|
if (defined(intersection)) {
|
distance = Cartesian3.distance(position, intersection);
|
}
|
|
if (cameraUnderground) {
|
var distanceUnderground = getZoomDistanceUnderground(
|
controller,
|
ray,
|
height
|
);
|
if (defined(distance)) {
|
distance = Math.min(distance, distanceUnderground);
|
} else {
|
distance = distanceUnderground;
|
}
|
}
|
|
if (!defined(distance)) {
|
var normal = Cartesian3.UNIT_X;
|
distance =
|
-Cartesian3.dot(normal, position) / Cartesian3.dot(normal, direction);
|
}
|
|
handleZoom(
|
controller,
|
startPosition,
|
movement,
|
controller._zoomFactor,
|
distance
|
);
|
}
|
|
function updateCV(controller) {
|
var scene = controller._scene;
|
var camera = scene.camera;
|
|
if (!Matrix4.equals(Matrix4.IDENTITY, camera.transform)) {
|
reactToInput(
|
controller,
|
controller.enableRotate,
|
controller.rotateEventTypes,
|
rotate3D,
|
controller.inertiaSpin,
|
"_lastInertiaSpinMovement"
|
);
|
reactToInput(
|
controller,
|
controller.enableZoom,
|
controller.zoomEventTypes,
|
zoom3D,
|
controller.inertiaZoom,
|
"_lastInertiaZoomMovement"
|
);
|
} else {
|
var tweens = controller._tweens;
|
|
if (controller._aggregator.anyButtonDown) {
|
tweens.removeAll();
|
}
|
|
reactToInput(
|
controller,
|
controller.enableTilt,
|
controller.tiltEventTypes,
|
rotateCV,
|
controller.inertiaSpin,
|
"_lastInertiaTiltMovement"
|
);
|
reactToInput(
|
controller,
|
controller.enableTranslate,
|
controller.translateEventTypes,
|
translateCV,
|
controller.inertiaTranslate,
|
"_lastInertiaTranslateMovement"
|
);
|
reactToInput(
|
controller,
|
controller.enableZoom,
|
controller.zoomEventTypes,
|
zoomCV,
|
controller.inertiaZoom,
|
"_lastInertiaZoomMovement"
|
);
|
reactToInput(
|
controller,
|
controller.enableLook,
|
controller.lookEventTypes,
|
look3D
|
);
|
|
if (
|
!controller._aggregator.anyButtonDown &&
|
!tweens.contains(controller._tween)
|
) {
|
var tween = camera.createCorrectPositionTween(
|
controller.bounceAnimationTime
|
);
|
if (defined(tween)) {
|
controller._tween = tweens.add(tween);
|
}
|
}
|
|
tweens.update();
|
}
|
}
|
|
var scratchStrafeRay = new Ray();
|
var scratchStrafePlane = new Plane(Cartesian3.UNIT_X, 0.0);
|
var scratchStrafeIntersection = new Cartesian3();
|
var scratchStrafeDirection = new Cartesian3();
|
var scratchMousePos = new Cartesian3();
|
|
function strafe(controller, movement, strafeStartPosition) {
|
var scene = controller._scene;
|
var camera = scene.camera;
|
|
var ray = camera.getPickRay(movement.endPosition, scratchStrafeRay);
|
|
var direction = Cartesian3.clone(camera.direction, scratchStrafeDirection);
|
if (scene.mode === SceneMode.COLUMBUS_VIEW) {
|
Cartesian3.fromElements(direction.z, direction.x, direction.y, direction);
|
}
|
|
var plane = Plane.fromPointNormal(
|
strafeStartPosition,
|
direction,
|
scratchStrafePlane
|
);
|
var intersection = IntersectionTests.rayPlane(
|
ray,
|
plane,
|
scratchStrafeIntersection
|
);
|
if (!defined(intersection)) {
|
return;
|
}
|
|
direction = Cartesian3.subtract(strafeStartPosition, intersection, direction);
|
if (scene.mode === SceneMode.COLUMBUS_VIEW) {
|
Cartesian3.fromElements(direction.y, direction.z, direction.x, direction);
|
}
|
|
Cartesian3.add(camera.position, direction, camera.position);
|
}
|
|
var spin3DPick = new Cartesian3();
|
var scratchCartographic = new Cartographic();
|
var scratchRadii = new Cartesian3();
|
var scratchEllipsoid = new Ellipsoid();
|
var scratchLookUp = new Cartesian3();
|
var scratchNormal = new Cartesian3();
|
|
function spin3D(controller, startPosition, movement) {
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var cameraUnderground = controller._cameraUnderground;
|
var ellipsoid = controller._ellipsoid;
|
|
if (!Matrix4.equals(camera.transform, Matrix4.IDENTITY)) {
|
rotate3D(controller, startPosition, movement);
|
return;
|
}
|
|
var magnitude;
|
var radii;
|
|
var up = ellipsoid.geodeticSurfaceNormal(camera.position, scratchLookUp);
|
|
if (Cartesian2.equals(startPosition, controller._rotateMousePosition)) {
|
if (controller._looking) {
|
look3D(controller, startPosition, movement, up);
|
} else if (controller._rotating) {
|
rotate3D(controller, startPosition, movement);
|
} else if (controller._strafing) {
|
continueStrafing(controller, movement);
|
} else {
|
if (
|
Cartesian3.magnitude(camera.position) <
|
Cartesian3.magnitude(controller._rotateStartPosition)
|
) {
|
// Pan action is no longer valid if camera moves below the pan ellipsoid
|
return;
|
}
|
magnitude = Cartesian3.magnitude(controller._rotateStartPosition);
|
radii = scratchRadii;
|
radii.x = radii.y = radii.z = magnitude;
|
ellipsoid = Ellipsoid.fromCartesian3(radii, scratchEllipsoid);
|
pan3D(controller, startPosition, movement, ellipsoid);
|
}
|
return;
|
}
|
controller._looking = false;
|
controller._rotating = false;
|
controller._strafing = false;
|
|
var height = ellipsoid.cartesianToCartographic(
|
camera.positionWC,
|
scratchCartographic
|
).height;
|
var globe = controller._globe;
|
|
if (defined(globe) && height < controller._minimumPickingTerrainHeight) {
|
var mousePos = pickGlobe(
|
controller,
|
movement.startPosition,
|
scratchMousePos
|
);
|
if (defined(mousePos)) {
|
var strafing = false;
|
var ray = camera.getPickRay(movement.startPosition, pickGlobeScratchRay);
|
|
if (cameraUnderground) {
|
strafing = true;
|
getStrafeStartPositionUnderground(controller, ray, mousePos, mousePos);
|
} else {
|
var normal = ellipsoid.geodeticSurfaceNormal(mousePos, scratchNormal);
|
var tangentPick =
|
Math.abs(Cartesian3.dot(ray.direction, normal)) < 0.05;
|
|
if (tangentPick) {
|
strafing = true;
|
} else {
|
strafing =
|
Cartesian3.magnitude(camera.position) <
|
Cartesian3.magnitude(mousePos);
|
}
|
}
|
|
if (strafing) {
|
Cartesian2.clone(startPosition, controller._strafeEndMousePosition);
|
Cartesian3.clone(mousePos, controller._strafeStartPosition);
|
controller._strafing = true;
|
strafe(controller, movement, controller._strafeStartPosition);
|
} else {
|
magnitude = Cartesian3.magnitude(mousePos);
|
radii = scratchRadii;
|
radii.x = radii.y = radii.z = magnitude;
|
ellipsoid = Ellipsoid.fromCartesian3(radii, scratchEllipsoid);
|
pan3D(controller, startPosition, movement, ellipsoid);
|
|
Cartesian3.clone(mousePos, controller._rotateStartPosition);
|
}
|
} else {
|
controller._looking = true;
|
look3D(controller, startPosition, movement, up);
|
}
|
} else if (
|
defined(
|
camera.pickEllipsoid(
|
movement.startPosition,
|
controller._ellipsoid,
|
spin3DPick
|
)
|
)
|
) {
|
pan3D(controller, startPosition, movement, controller._ellipsoid);
|
Cartesian3.clone(spin3DPick, controller._rotateStartPosition);
|
} else if (height > controller._minimumTrackBallHeight) {
|
controller._rotating = true;
|
rotate3D(controller, startPosition, movement);
|
} else {
|
controller._looking = true;
|
look3D(controller, startPosition, movement, up);
|
}
|
|
Cartesian2.clone(startPosition, controller._rotateMousePosition);
|
}
|
|
function rotate3D(
|
controller,
|
startPosition,
|
movement,
|
constrainedAxis,
|
rotateOnlyVertical,
|
rotateOnlyHorizontal
|
) {
|
rotateOnlyVertical = defaultValue(rotateOnlyVertical, false);
|
rotateOnlyHorizontal = defaultValue(rotateOnlyHorizontal, false);
|
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var canvas = scene.canvas;
|
|
var oldAxis = camera.constrainedAxis;
|
if (defined(constrainedAxis)) {
|
camera.constrainedAxis = constrainedAxis;
|
}
|
|
var rho = Cartesian3.magnitude(camera.position);
|
var rotateRate =
|
controller._rotateFactor * (rho - controller._rotateRateRangeAdjustment);
|
|
if (rotateRate > controller._maximumRotateRate) {
|
rotateRate = controller._maximumRotateRate;
|
}
|
|
if (rotateRate < controller._minimumRotateRate) {
|
rotateRate = controller._minimumRotateRate;
|
}
|
|
var phiWindowRatio =
|
(movement.startPosition.x - movement.endPosition.x) / canvas.clientWidth;
|
var thetaWindowRatio =
|
(movement.startPosition.y - movement.endPosition.y) / canvas.clientHeight;
|
phiWindowRatio = Math.min(phiWindowRatio, controller.maximumMovementRatio);
|
thetaWindowRatio = Math.min(
|
thetaWindowRatio,
|
controller.maximumMovementRatio
|
);
|
|
var deltaPhi = rotateRate * phiWindowRatio * Math.PI * 2.0;
|
var deltaTheta = rotateRate * thetaWindowRatio * Math.PI;
|
|
if (!rotateOnlyVertical) {
|
camera.rotateRight(deltaPhi);
|
}
|
|
if (!rotateOnlyHorizontal) {
|
camera.rotateUp(deltaTheta);
|
}
|
|
camera.constrainedAxis = oldAxis;
|
}
|
|
var pan3DP0 = Cartesian4.clone(Cartesian4.UNIT_W);
|
var pan3DP1 = Cartesian4.clone(Cartesian4.UNIT_W);
|
var pan3DTemp0 = new Cartesian3();
|
var pan3DTemp1 = new Cartesian3();
|
var pan3DTemp2 = new Cartesian3();
|
var pan3DTemp3 = new Cartesian3();
|
var pan3DStartMousePosition = new Cartesian2();
|
var pan3DEndMousePosition = new Cartesian2();
|
|
function pan3D(controller, startPosition, movement, ellipsoid) {
|
var scene = controller._scene;
|
var camera = scene.camera;
|
|
var startMousePosition = Cartesian2.clone(
|
movement.startPosition,
|
pan3DStartMousePosition
|
);
|
var endMousePosition = Cartesian2.clone(
|
movement.endPosition,
|
pan3DEndMousePosition
|
);
|
|
var p0 = camera.pickEllipsoid(startMousePosition, ellipsoid, pan3DP0);
|
var p1 = camera.pickEllipsoid(endMousePosition, ellipsoid, pan3DP1);
|
|
if (!defined(p0) || !defined(p1)) {
|
controller._rotating = true;
|
rotate3D(controller, startPosition, movement);
|
return;
|
}
|
|
p0 = camera.worldToCameraCoordinates(p0, p0);
|
p1 = camera.worldToCameraCoordinates(p1, p1);
|
|
if (!defined(camera.constrainedAxis)) {
|
Cartesian3.normalize(p0, p0);
|
Cartesian3.normalize(p1, p1);
|
var dot = Cartesian3.dot(p0, p1);
|
var axis = Cartesian3.cross(p0, p1, pan3DTemp0);
|
|
if (
|
dot < 1.0 &&
|
!Cartesian3.equalsEpsilon(axis, Cartesian3.ZERO, CesiumMath.EPSILON14)
|
) {
|
// dot is in [0, 1]
|
var angle = Math.acos(dot);
|
camera.rotate(axis, angle);
|
}
|
} else {
|
var basis0 = camera.constrainedAxis;
|
var basis1 = Cartesian3.mostOrthogonalAxis(basis0, pan3DTemp0);
|
Cartesian3.cross(basis1, basis0, basis1);
|
Cartesian3.normalize(basis1, basis1);
|
var basis2 = Cartesian3.cross(basis0, basis1, pan3DTemp1);
|
|
var startRho = Cartesian3.magnitude(p0);
|
var startDot = Cartesian3.dot(basis0, p0);
|
var startTheta = Math.acos(startDot / startRho);
|
var startRej = Cartesian3.multiplyByScalar(basis0, startDot, pan3DTemp2);
|
Cartesian3.subtract(p0, startRej, startRej);
|
Cartesian3.normalize(startRej, startRej);
|
|
var endRho = Cartesian3.magnitude(p1);
|
var endDot = Cartesian3.dot(basis0, p1);
|
var endTheta = Math.acos(endDot / endRho);
|
var endRej = Cartesian3.multiplyByScalar(basis0, endDot, pan3DTemp3);
|
Cartesian3.subtract(p1, endRej, endRej);
|
Cartesian3.normalize(endRej, endRej);
|
|
var startPhi = Math.acos(Cartesian3.dot(startRej, basis1));
|
if (Cartesian3.dot(startRej, basis2) < 0) {
|
startPhi = CesiumMath.TWO_PI - startPhi;
|
}
|
|
var endPhi = Math.acos(Cartesian3.dot(endRej, basis1));
|
if (Cartesian3.dot(endRej, basis2) < 0) {
|
endPhi = CesiumMath.TWO_PI - endPhi;
|
}
|
|
var deltaPhi = startPhi - endPhi;
|
|
var east;
|
if (
|
Cartesian3.equalsEpsilon(basis0, camera.position, CesiumMath.EPSILON2)
|
) {
|
east = camera.right;
|
} else {
|
east = Cartesian3.cross(basis0, camera.position, pan3DTemp0);
|
}
|
|
var planeNormal = Cartesian3.cross(basis0, east, pan3DTemp0);
|
var side0 = Cartesian3.dot(
|
planeNormal,
|
Cartesian3.subtract(p0, basis0, pan3DTemp1)
|
);
|
var side1 = Cartesian3.dot(
|
planeNormal,
|
Cartesian3.subtract(p1, basis0, pan3DTemp1)
|
);
|
|
var deltaTheta;
|
if (side0 > 0 && side1 > 0) {
|
deltaTheta = endTheta - startTheta;
|
} else if (side0 > 0 && side1 <= 0) {
|
if (Cartesian3.dot(camera.position, basis0) > 0) {
|
deltaTheta = -startTheta - endTheta;
|
} else {
|
deltaTheta = startTheta + endTheta;
|
}
|
} else {
|
deltaTheta = startTheta - endTheta;
|
}
|
|
camera.rotateRight(deltaPhi);
|
camera.rotateUp(deltaTheta);
|
}
|
}
|
|
var zoom3DUnitPosition = new Cartesian3();
|
var zoom3DCartographic = new Cartographic();
|
|
function zoom3D(controller, startPosition, movement) {
|
if (defined(movement.distance)) {
|
movement = movement.distance;
|
}
|
|
var ellipsoid = controller._ellipsoid;
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var canvas = scene.canvas;
|
|
var cameraUnderground = controller._cameraUnderground;
|
|
var windowPosition;
|
|
if (cameraUnderground) {
|
windowPosition = startPosition;
|
} else {
|
windowPosition = zoomCVWindowPos;
|
windowPosition.x = canvas.clientWidth / 2;
|
windowPosition.y = canvas.clientHeight / 2;
|
}
|
|
var ray = camera.getPickRay(windowPosition, zoomCVWindowRay);
|
|
var intersection;
|
var height = ellipsoid.cartesianToCartographic(
|
camera.position,
|
zoom3DCartographic
|
).height;
|
if (height < controller._minimumPickingTerrainHeight) {
|
intersection = pickGlobe(controller, windowPosition, zoomCVIntersection);
|
}
|
|
var distance;
|
if (defined(intersection)) {
|
distance = Cartesian3.distance(ray.origin, intersection);
|
}
|
|
if (cameraUnderground) {
|
var distanceUnderground = getZoomDistanceUnderground(
|
controller,
|
ray,
|
height
|
);
|
if (defined(distance)) {
|
distance = Math.min(distance, distanceUnderground);
|
} else {
|
distance = distanceUnderground;
|
}
|
}
|
|
if (!defined(distance)) {
|
distance = height;
|
}
|
|
var unitPosition = Cartesian3.normalize(camera.position, zoom3DUnitPosition);
|
handleZoom(
|
controller,
|
startPosition,
|
movement,
|
controller._zoomFactor,
|
distance,
|
Cartesian3.dot(unitPosition, camera.direction)
|
);
|
}
|
|
var tilt3DWindowPos = new Cartesian2();
|
var tilt3DRay = new Ray();
|
var tilt3DCenter = new Cartesian3();
|
var tilt3DVerticalCenter = new Cartesian3();
|
var tilt3DTransform = new Matrix4();
|
var tilt3DVerticalTransform = new Matrix4();
|
var tilt3DOldTransform = new Matrix4();
|
var tilt3DQuaternion = new Quaternion();
|
var tilt3DMatrix = new Matrix3();
|
var tilt3DCart = new Cartographic();
|
var tilt3DLookUp = new Cartesian3();
|
|
function tilt3D(controller, startPosition, movement) {
|
var scene = controller._scene;
|
var camera = scene.camera;
|
|
if (!Matrix4.equals(camera.transform, Matrix4.IDENTITY)) {
|
return;
|
}
|
|
if (defined(movement.angleAndHeight)) {
|
movement = movement.angleAndHeight;
|
}
|
|
if (!Cartesian2.equals(startPosition, controller._tiltCenterMousePosition)) {
|
controller._tiltOnEllipsoid = false;
|
controller._looking = false;
|
}
|
|
if (controller._looking) {
|
var up = controller._ellipsoid.geodeticSurfaceNormal(
|
camera.position,
|
tilt3DLookUp
|
);
|
look3D(controller, startPosition, movement, up);
|
return;
|
}
|
|
var ellipsoid = controller._ellipsoid;
|
var cartographic = ellipsoid.cartesianToCartographic(
|
camera.position,
|
tilt3DCart
|
);
|
|
if (
|
controller._tiltOnEllipsoid ||
|
cartographic.height > controller._minimumCollisionTerrainHeight
|
) {
|
controller._tiltOnEllipsoid = true;
|
tilt3DOnEllipsoid(controller, startPosition, movement);
|
} else {
|
tilt3DOnTerrain(controller, startPosition, movement);
|
}
|
}
|
|
var tilt3DOnEllipsoidCartographic = new Cartographic();
|
|
function tilt3DOnEllipsoid(controller, startPosition, movement) {
|
var ellipsoid = controller._ellipsoid;
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var minHeight = controller.minimumZoomDistance * 0.25;
|
var height = ellipsoid.cartesianToCartographic(
|
camera.positionWC,
|
tilt3DOnEllipsoidCartographic
|
).height;
|
if (
|
height - minHeight - 1.0 < CesiumMath.EPSILON3 &&
|
movement.endPosition.y - movement.startPosition.y < 0
|
) {
|
return;
|
}
|
|
var canvas = scene.canvas;
|
|
var windowPosition = tilt3DWindowPos;
|
windowPosition.x = canvas.clientWidth / 2;
|
windowPosition.y = canvas.clientHeight / 2;
|
var ray = camera.getPickRay(windowPosition, tilt3DRay);
|
|
var center;
|
var intersection = IntersectionTests.rayEllipsoid(ray, ellipsoid);
|
if (defined(intersection)) {
|
center = Ray.getPoint(ray, intersection.start, tilt3DCenter);
|
} else if (height > controller._minimumTrackBallHeight) {
|
var grazingAltitudeLocation = IntersectionTests.grazingAltitudeLocation(
|
ray,
|
ellipsoid
|
);
|
if (!defined(grazingAltitudeLocation)) {
|
return;
|
}
|
var grazingAltitudeCart = ellipsoid.cartesianToCartographic(
|
grazingAltitudeLocation,
|
tilt3DCart
|
);
|
grazingAltitudeCart.height = 0.0;
|
center = ellipsoid.cartographicToCartesian(
|
grazingAltitudeCart,
|
tilt3DCenter
|
);
|
} else {
|
controller._looking = true;
|
var up = controller._ellipsoid.geodeticSurfaceNormal(
|
camera.position,
|
tilt3DLookUp
|
);
|
look3D(controller, startPosition, movement, up);
|
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
|
return;
|
}
|
|
var transform = Transforms.eastNorthUpToFixedFrame(
|
center,
|
ellipsoid,
|
tilt3DTransform
|
);
|
|
var oldGlobe = controller._globe;
|
var oldEllipsoid = controller._ellipsoid;
|
controller._globe = undefined;
|
controller._ellipsoid = Ellipsoid.UNIT_SPHERE;
|
controller._rotateFactor = 1.0;
|
controller._rotateRateRangeAdjustment = 1.0;
|
|
var oldTransform = Matrix4.clone(camera.transform, tilt3DOldTransform);
|
camera._setTransform(transform);
|
|
rotate3D(controller, startPosition, movement, Cartesian3.UNIT_Z);
|
|
camera._setTransform(oldTransform);
|
controller._globe = oldGlobe;
|
controller._ellipsoid = oldEllipsoid;
|
|
var radius = oldEllipsoid.maximumRadius;
|
controller._rotateFactor = 1.0 / radius;
|
controller._rotateRateRangeAdjustment = radius;
|
}
|
|
function tilt3DOnTerrain(controller, startPosition, movement) {
|
var ellipsoid = controller._ellipsoid;
|
var scene = controller._scene;
|
var camera = scene.camera;
|
var cameraUnderground = controller._cameraUnderground;
|
|
var center;
|
var ray;
|
var intersection;
|
|
if (Cartesian2.equals(startPosition, controller._tiltCenterMousePosition)) {
|
center = Cartesian3.clone(controller._tiltCenter, tilt3DCenter);
|
} else {
|
center = pickGlobe(controller, startPosition, tilt3DCenter);
|
|
if (!defined(center)) {
|
ray = camera.getPickRay(startPosition, tilt3DRay);
|
intersection = IntersectionTests.rayEllipsoid(ray, ellipsoid);
|
if (!defined(intersection)) {
|
var cartographic = ellipsoid.cartesianToCartographic(
|
camera.position,
|
tilt3DCart
|
);
|
if (cartographic.height <= controller._minimumTrackBallHeight) {
|
controller._looking = true;
|
var up = controller._ellipsoid.geodeticSurfaceNormal(
|
camera.position,
|
tilt3DLookUp
|
);
|
look3D(controller, startPosition, movement, up);
|
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
|
}
|
return;
|
}
|
center = Ray.getPoint(ray, intersection.start, tilt3DCenter);
|
}
|
|
if (cameraUnderground) {
|
if (!defined(ray)) {
|
ray = camera.getPickRay(startPosition, tilt3DRay);
|
}
|
getTiltCenterUnderground(controller, ray, center, center);
|
}
|
|
Cartesian2.clone(startPosition, controller._tiltCenterMousePosition);
|
Cartesian3.clone(center, controller._tiltCenter);
|
}
|
|
var canvas = scene.canvas;
|
|
var windowPosition = tilt3DWindowPos;
|
windowPosition.x = canvas.clientWidth / 2;
|
windowPosition.y = controller._tiltCenterMousePosition.y;
|
ray = camera.getPickRay(windowPosition, tilt3DRay);
|
|
var mag = Cartesian3.magnitude(center);
|
var radii = Cartesian3.fromElements(mag, mag, mag, scratchRadii);
|
var newEllipsoid = Ellipsoid.fromCartesian3(radii, scratchEllipsoid);
|
|
intersection = IntersectionTests.rayEllipsoid(ray, newEllipsoid);
|
if (!defined(intersection)) {
|
return;
|
}
|
|
var t =
|
Cartesian3.magnitude(ray.origin) > mag
|
? intersection.start
|
: intersection.stop;
|
var verticalCenter = Ray.getPoint(ray, t, tilt3DVerticalCenter);
|
|
var transform = Transforms.eastNorthUpToFixedFrame(
|
center,
|
ellipsoid,
|
tilt3DTransform
|
);
|
var verticalTransform = Transforms.eastNorthUpToFixedFrame(
|
verticalCenter,
|
newEllipsoid,
|
tilt3DVerticalTransform
|
);
|
|
var oldGlobe = controller._globe;
|
var oldEllipsoid = controller._ellipsoid;
|
controller._globe = undefined;
|
controller._ellipsoid = Ellipsoid.UNIT_SPHERE;
|
controller._rotateFactor = 1.0;
|
controller._rotateRateRangeAdjustment = 1.0;
|
|
var constrainedAxis = Cartesian3.UNIT_Z;
|
|
var oldTransform = Matrix4.clone(camera.transform, tilt3DOldTransform);
|
camera._setTransform(verticalTransform);
|
|
var tangent = Cartesian3.cross(
|
verticalCenter,
|
camera.positionWC,
|
tilt3DCartesian3
|
);
|
var dot = Cartesian3.dot(camera.rightWC, tangent);
|
|
if (dot < 0.0) {
|
var movementDelta = movement.startPosition.y - movement.endPosition.y;
|
if (
|
(cameraUnderground && movementDelta < 0.0) ||
|
(!cameraUnderground && movementDelta > 0.0)
|
) {
|
// Prevent camera from flipping past the up axis
|
constrainedAxis = undefined;
|
}
|
|
var oldConstrainedAxis = camera.constrainedAxis;
|
camera.constrainedAxis = undefined;
|
|
rotate3D(controller, startPosition, movement, constrainedAxis, true, false);
|
|
camera.constrainedAxis = oldConstrainedAxis;
|
} else {
|
rotate3D(controller, startPosition, movement, constrainedAxis, true, false);
|
}
|
|
camera._setTransform(transform);
|
rotate3D(controller, startPosition, movement, constrainedAxis, false, true);
|
|
if (defined(camera.constrainedAxis)) {
|
var right = Cartesian3.cross(
|
camera.direction,
|
camera.constrainedAxis,
|
tilt3DCartesian3
|
);
|
if (
|
!Cartesian3.equalsEpsilon(right, Cartesian3.ZERO, CesiumMath.EPSILON6)
|
) {
|
if (Cartesian3.dot(right, camera.right) < 0.0) {
|
Cartesian3.negate(right, right);
|
}
|
|
Cartesian3.cross(right, camera.direction, camera.up);
|
Cartesian3.cross(camera.direction, camera.up, camera.right);
|
|
Cartesian3.normalize(camera.up, camera.up);
|
Cartesian3.normalize(camera.right, camera.right);
|
}
|
}
|
|
camera._setTransform(oldTransform);
|
controller._globe = oldGlobe;
|
controller._ellipsoid = oldEllipsoid;
|
|
var radius = oldEllipsoid.maximumRadius;
|
controller._rotateFactor = 1.0 / radius;
|
controller._rotateRateRangeAdjustment = radius;
|
|
var originalPosition = Cartesian3.clone(camera.positionWC, tilt3DCartesian3);
|
|
if (controller.enableCollisionDetection) {
|
adjustHeightForTerrain(controller);
|
}
|
|
if (!Cartesian3.equals(camera.positionWC, originalPosition)) {
|
camera._setTransform(verticalTransform);
|
camera.worldToCameraCoordinatesPoint(originalPosition, originalPosition);
|
|
var magSqrd = Cartesian3.magnitudeSquared(originalPosition);
|
if (Cartesian3.magnitudeSquared(camera.position) > magSqrd) {
|
Cartesian3.normalize(camera.position, camera.position);
|
Cartesian3.multiplyByScalar(
|
camera.position,
|
Math.sqrt(magSqrd),
|
camera.position
|
);
|
}
|
|
var angle = Cartesian3.angleBetween(originalPosition, camera.position);
|
var axis = Cartesian3.cross(
|
originalPosition,
|
camera.position,
|
originalPosition
|
);
|
Cartesian3.normalize(axis, axis);
|
|
var quaternion = Quaternion.fromAxisAngle(axis, angle, tilt3DQuaternion);
|
var rotation = Matrix3.fromQuaternion(quaternion, tilt3DMatrix);
|
Matrix3.multiplyByVector(rotation, camera.direction, camera.direction);
|
Matrix3.multiplyByVector(rotation, camera.up, camera.up);
|
Cartesian3.cross(camera.direction, camera.up, camera.right);
|
Cartesian3.cross(camera.right, camera.direction, camera.up);
|
|
camera._setTransform(oldTransform);
|
}
|
}
|
|
var look3DStartPos = new Cartesian2();
|
var look3DEndPos = new Cartesian2();
|
var look3DStartRay = new Ray();
|
var look3DEndRay = new Ray();
|
var look3DNegativeRot = new Cartesian3();
|
var look3DTan = new Cartesian3();
|
|
function look3D(controller, startPosition, movement, rotationAxis) {
|
var scene = controller._scene;
|
var camera = scene.camera;
|
|
var startPos = look3DStartPos;
|
startPos.x = movement.startPosition.x;
|
startPos.y = 0.0;
|
var endPos = look3DEndPos;
|
endPos.x = movement.endPosition.x;
|
endPos.y = 0.0;
|
|
var startRay = camera.getPickRay(startPos, look3DStartRay);
|
var endRay = camera.getPickRay(endPos, look3DEndRay);
|
var angle = 0.0;
|
var start;
|
var end;
|
|
if (camera.frustum instanceof OrthographicFrustum) {
|
start = startRay.origin;
|
end = endRay.origin;
|
|
Cartesian3.add(camera.direction, start, start);
|
Cartesian3.add(camera.direction, end, end);
|
|
Cartesian3.subtract(start, camera.position, start);
|
Cartesian3.subtract(end, camera.position, end);
|
|
Cartesian3.normalize(start, start);
|
Cartesian3.normalize(end, end);
|
} else {
|
start = startRay.direction;
|
end = endRay.direction;
|
}
|
|
var dot = Cartesian3.dot(start, end);
|
if (dot < 1.0) {
|
// dot is in [0, 1]
|
angle = Math.acos(dot);
|
}
|
|
angle = movement.startPosition.x > movement.endPosition.x ? -angle : angle;
|
|
var horizontalRotationAxis = controller._horizontalRotationAxis;
|
if (defined(rotationAxis)) {
|
camera.look(rotationAxis, -angle);
|
} else if (defined(horizontalRotationAxis)) {
|
camera.look(horizontalRotationAxis, -angle);
|
} else {
|
camera.lookLeft(angle);
|
}
|
|
startPos.x = 0.0;
|
startPos.y = movement.startPosition.y;
|
endPos.x = 0.0;
|
endPos.y = movement.endPosition.y;
|
|
startRay = camera.getPickRay(startPos, look3DStartRay);
|
endRay = camera.getPickRay(endPos, look3DEndRay);
|
angle = 0.0;
|
|
if (camera.frustum instanceof OrthographicFrustum) {
|
start = startRay.origin;
|
end = endRay.origin;
|
|
Cartesian3.add(camera.direction, start, start);
|
Cartesian3.add(camera.direction, end, end);
|
|
Cartesian3.subtract(start, camera.position, start);
|
Cartesian3.subtract(end, camera.position, end);
|
|
Cartesian3.normalize(start, start);
|
Cartesian3.normalize(end, end);
|
} else {
|
start = startRay.direction;
|
end = endRay.direction;
|
}
|
|
dot = Cartesian3.dot(start, end);
|
if (dot < 1.0) {
|
// dot is in [0, 1]
|
angle = Math.acos(dot);
|
}
|
angle = movement.startPosition.y > movement.endPosition.y ? -angle : angle;
|
|
rotationAxis = defaultValue(rotationAxis, horizontalRotationAxis);
|
if (defined(rotationAxis)) {
|
var direction = camera.direction;
|
var negativeRotationAxis = Cartesian3.negate(
|
rotationAxis,
|
look3DNegativeRot
|
);
|
var northParallel = Cartesian3.equalsEpsilon(
|
direction,
|
rotationAxis,
|
CesiumMath.EPSILON2
|
);
|
var southParallel = Cartesian3.equalsEpsilon(
|
direction,
|
negativeRotationAxis,
|
CesiumMath.EPSILON2
|
);
|
if (!northParallel && !southParallel) {
|
dot = Cartesian3.dot(direction, rotationAxis);
|
var angleToAxis = CesiumMath.acosClamped(dot);
|
if (angle > 0 && angle > angleToAxis) {
|
angle = angleToAxis - CesiumMath.EPSILON4;
|
}
|
|
dot = Cartesian3.dot(direction, negativeRotationAxis);
|
angleToAxis = CesiumMath.acosClamped(dot);
|
if (angle < 0 && -angle > angleToAxis) {
|
angle = -angleToAxis + CesiumMath.EPSILON4;
|
}
|
|
var tangent = Cartesian3.cross(rotationAxis, direction, look3DTan);
|
camera.look(tangent, angle);
|
} else if ((northParallel && angle < 0) || (southParallel && angle > 0)) {
|
camera.look(camera.right, -angle);
|
}
|
} else {
|
camera.lookUp(angle);
|
}
|
}
|
|
function update3D(controller) {
|
reactToInput(
|
controller,
|
controller.enableRotate,
|
controller.rotateEventTypes,
|
spin3D,
|
controller.inertiaSpin,
|
"_lastInertiaSpinMovement"
|
);
|
reactToInput(
|
controller,
|
controller.enableZoom,
|
controller.zoomEventTypes,
|
zoom3D,
|
controller.inertiaZoom,
|
"_lastInertiaZoomMovement"
|
);
|
reactToInput(
|
controller,
|
controller.enableTilt,
|
controller.tiltEventTypes,
|
tilt3D,
|
controller.inertiaSpin,
|
"_lastInertiaTiltMovement"
|
);
|
reactToInput(
|
controller,
|
controller.enableLook,
|
controller.lookEventTypes,
|
look3D
|
);
|
}
|
|
var scratchAdjustHeightTransform = new Matrix4();
|
var scratchAdjustHeightCartographic = new Cartographic();
|
|
function adjustHeightForTerrain(controller) {
|
controller._adjustedHeightForTerrain = true;
|
|
var scene = controller._scene;
|
var mode = scene.mode;
|
var globe = scene.globe;
|
|
if (
|
!defined(globe) ||
|
mode === SceneMode.SCENE2D ||
|
mode === SceneMode.MORPHING
|
) {
|
return;
|
}
|
|
var camera = scene.camera;
|
var ellipsoid = globe.ellipsoid;
|
var projection = scene.mapProjection;
|
|
var transform;
|
var mag;
|
if (!Matrix4.equals(camera.transform, Matrix4.IDENTITY)) {
|
transform = Matrix4.clone(camera.transform, scratchAdjustHeightTransform);
|
mag = Cartesian3.magnitude(camera.position);
|
camera._setTransform(Matrix4.IDENTITY);
|
}
|
|
var cartographic = scratchAdjustHeightCartographic;
|
if (mode === SceneMode.SCENE3D) {
|
ellipsoid.cartesianToCartographic(camera.position, cartographic);
|
} else {
|
projection.unproject(camera.position, cartographic);
|
}
|
|
var heightUpdated = false;
|
if (cartographic.height < controller._minimumCollisionTerrainHeight) {
|
var globeHeight = controller._scene.globeHeight;
|
if (defined(globeHeight)) {
|
var height = globeHeight + controller.minimumZoomDistance;
|
if (cartographic.height < height) {
|
cartographic.height = height;
|
if (mode === SceneMode.SCENE3D) {
|
ellipsoid.cartographicToCartesian(cartographic, camera.position);
|
} else {
|
projection.project(cartographic, camera.position);
|
}
|
heightUpdated = true;
|
}
|
}
|
}
|
|
if (defined(transform)) {
|
camera._setTransform(transform);
|
if (heightUpdated) {
|
Cartesian3.normalize(camera.position, camera.position);
|
Cartesian3.negate(camera.position, camera.direction);
|
Cartesian3.multiplyByScalar(
|
camera.position,
|
Math.max(mag, controller.minimumZoomDistance),
|
camera.position
|
);
|
Cartesian3.normalize(camera.direction, camera.direction);
|
Cartesian3.cross(camera.direction, camera.up, camera.right);
|
Cartesian3.cross(camera.right, camera.direction, camera.up);
|
}
|
}
|
}
|
|
/**
|
* @private
|
*/
|
ScreenSpaceCameraController.prototype.onMap = function () {
|
var scene = this._scene;
|
var mode = scene.mode;
|
var camera = scene.camera;
|
|
if (mode === SceneMode.COLUMBUS_VIEW) {
|
return (
|
Math.abs(camera.position.x) - this._maxCoord.x < 0 &&
|
Math.abs(camera.position.y) - this._maxCoord.y < 0
|
);
|
}
|
|
return true;
|
};
|
|
var scratchPreviousPosition = new Cartesian3();
|
var scratchPreviousDirection = new Cartesian3();
|
|
/**
|
* @private
|
*/
|
ScreenSpaceCameraController.prototype.update = function () {
|
var scene = this._scene;
|
var camera = scene.camera;
|
var globe = scene.globe;
|
var mode = scene.mode;
|
|
if (!Matrix4.equals(camera.transform, Matrix4.IDENTITY)) {
|
this._globe = undefined;
|
this._ellipsoid = Ellipsoid.UNIT_SPHERE;
|
} else {
|
this._globe = globe;
|
this._ellipsoid = defined(this._globe)
|
? this._globe.ellipsoid
|
: scene.mapProjection.ellipsoid;
|
}
|
|
var exaggeration = defined(this._globe)
|
? this._globe.terrainExaggeration
|
: 1.0;
|
var exaggerationRelativeHeight = defined(this._globe)
|
? this._globe.terrainExaggerationRelativeHeight
|
: 0.0;
|
this._minimumCollisionTerrainHeight = TerrainExaggeration.getHeight(
|
this.minimumCollisionTerrainHeight,
|
exaggeration,
|
exaggerationRelativeHeight
|
);
|
this._minimumPickingTerrainHeight = TerrainExaggeration.getHeight(
|
this.minimumPickingTerrainHeight,
|
exaggeration,
|
exaggerationRelativeHeight
|
);
|
this._minimumTrackBallHeight = TerrainExaggeration.getHeight(
|
this.minimumTrackBallHeight,
|
exaggeration,
|
exaggerationRelativeHeight
|
);
|
|
this._cameraUnderground = scene.cameraUnderground && defined(this._globe);
|
|
var radius = this._ellipsoid.maximumRadius;
|
this._rotateFactor = 1.0 / radius;
|
this._rotateRateRangeAdjustment = radius;
|
|
this._adjustedHeightForTerrain = false;
|
var previousPosition = Cartesian3.clone(
|
camera.positionWC,
|
scratchPreviousPosition
|
);
|
var previousDirection = Cartesian3.clone(
|
camera.directionWC,
|
scratchPreviousDirection
|
);
|
|
if (mode === SceneMode.SCENE2D) {
|
update2D(this);
|
} else if (mode === SceneMode.COLUMBUS_VIEW) {
|
this._horizontalRotationAxis = Cartesian3.UNIT_Z;
|
updateCV(this);
|
} else if (mode === SceneMode.SCENE3D) {
|
this._horizontalRotationAxis = undefined;
|
update3D(this);
|
}
|
|
if (this.enableCollisionDetection && !this._adjustedHeightForTerrain) {
|
// Adjust the camera height if the camera moved at all (user input or inertia) and an action didn't already adjust the camera height
|
var cameraChanged =
|
!Cartesian3.equals(previousPosition, camera.positionWC) ||
|
!Cartesian3.equals(previousDirection, camera.directionWC);
|
if (cameraChanged) {
|
adjustHeightForTerrain(this);
|
}
|
}
|
|
this._aggregator.reset();
|
};
|
|
/**
|
* Returns true if this object was destroyed; otherwise, false.
|
* <br /><br />
|
* If this object was destroyed, it should not be used; calling any function other than
|
* <code>isDestroyed</code> will result in a {@link DeveloperError} exception.
|
*
|
* @returns {Boolean} <code>true</code> if this object was destroyed; otherwise, <code>false</code>.
|
*
|
* @see ScreenSpaceCameraController#destroy
|
*/
|
ScreenSpaceCameraController.prototype.isDestroyed = function () {
|
return false;
|
};
|
|
/**
|
* Removes mouse listeners held by this object.
|
* <br /><br />
|
* Once an object is destroyed, it should not be used; calling any function other than
|
* <code>isDestroyed</code> will result in a {@link DeveloperError} exception. Therefore,
|
* assign the return value (<code>undefined</code>) to the object as done in the example.
|
*
|
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
|
*
|
*
|
* @example
|
* controller = controller && controller.destroy();
|
*
|
* @see ScreenSpaceCameraController#isDestroyed
|
*/
|
ScreenSpaceCameraController.prototype.destroy = function () {
|
this._tweens.removeAll();
|
this._aggregator = this._aggregator && this._aggregator.destroy();
|
return destroyObject(this);
|
};
|
export default ScreenSpaceCameraController;
|
