/* This file is automatically rebuilt by the Cesium build process. */
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define(['exports', './Matrix2-0e286ffc', './ComponentDatatype-9ed50558', './RuntimeError-4fdc4459', './when-8166c7dd'], (function (exports, Matrix2, ComponentDatatype, RuntimeError, when) { 'use strict';
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/**
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* An enum describing the attribute type for glTF and 3D Tiles.
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*
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* @enum {String}
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*
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* @private
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*/
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var AttributeType = {
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/**
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* The attribute is a single component.
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*
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* @type {String}
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* @constant
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*/
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SCALAR: "SCALAR",
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/**
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* The attribute is a two-component vector.
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*
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* @type {String}
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* @constant
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*/
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VEC2: "VEC2",
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/**
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* The attribute is a three-component vector.
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*
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* @type {String}
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* @constant
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*/
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VEC3: "VEC3",
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/**
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* The attribute is a four-component vector.
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*
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* @type {String}
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* @constant
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*/
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VEC4: "VEC4",
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/**
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* The attribute is a 2x2 matrix.
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*
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* @type {String}
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* @constant
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*/
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MAT2: "MAT2",
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/**
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* The attribute is a 3x3 matrix.
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*
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* @type {String}
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* @constant
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*/
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MAT3: "MAT3",
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/**
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* The attribute is a 4x4 matrix.
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*
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* @type {String}
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* @constant
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*/
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MAT4: "MAT4",
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};
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/**
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* Gets the scalar, vector, or matrix type for the attribute type.
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*
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* @param {AttributeType} attributeType The attribute type.
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* @returns {*} The math type.
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*
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* @private
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*/
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AttributeType.getMathType = function (attributeType) {
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switch (attributeType) {
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case AttributeType.SCALAR:
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return Number;
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case AttributeType.VEC2:
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return Matrix2.Cartesian2;
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case AttributeType.VEC3:
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return Matrix2.Cartesian3;
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case AttributeType.VEC4:
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return Matrix2.Cartesian4;
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case AttributeType.MAT2:
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return Matrix2.Matrix2;
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case AttributeType.MAT3:
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return Matrix2.Matrix3;
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case AttributeType.MAT4:
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return Matrix2.Matrix4;
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//>>includeStart('debug', pragmas.debug);
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default:
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throw new RuntimeError.DeveloperError("attributeType is not a valid value.");
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//>>includeEnd('debug');
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}
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};
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/**
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* Gets the number of components per attribute.
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*
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* @param {AttributeType} attributeType The attribute type.
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* @returns {Number} The number of components.
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*
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* @private
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*/
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AttributeType.getNumberOfComponents = function (attributeType) {
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switch (attributeType) {
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case AttributeType.SCALAR:
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return 1;
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case AttributeType.VEC2:
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return 2;
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case AttributeType.VEC3:
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return 3;
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case AttributeType.VEC4:
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case AttributeType.MAT2:
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return 4;
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case AttributeType.MAT3:
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return 9;
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case AttributeType.MAT4:
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return 16;
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//>>includeStart('debug', pragmas.debug);
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default:
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throw new RuntimeError.DeveloperError("attributeType is not a valid value.");
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//>>includeEnd('debug');
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}
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};
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/**
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* Gets the GLSL type for the attribute type.
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*
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* @param {AttributeType} attributeType The attribute type.
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* @returns {String} The GLSL type for the attribute type.
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*
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* @private
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*/
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AttributeType.getGlslType = function (attributeType) {
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//>>includeStart('debug', pragmas.debug);
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RuntimeError.Check.typeOf.string("attributeType", attributeType);
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//>>includeEnd('debug');
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switch (attributeType) {
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case AttributeType.SCALAR:
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return "float";
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case AttributeType.VEC2:
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return "vec2";
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case AttributeType.VEC3:
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return "vec3";
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case AttributeType.VEC4:
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return "vec4";
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case AttributeType.MAT2:
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return "mat2";
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case AttributeType.MAT3:
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return "mat3";
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case AttributeType.MAT4:
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return "mat4";
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//>>includeStart('debug', pragmas.debug);
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default:
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throw new RuntimeError.DeveloperError("attributeType is not a valid value.");
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//>>includeEnd('debug');
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}
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};
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var AttributeType$1 = Object.freeze(AttributeType);
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var RIGHT_SHIFT = 1.0 / 256.0;
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var LEFT_SHIFT = 256.0;
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/**
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* Attribute compression and decompression functions.
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*
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* @namespace AttributeCompression
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*
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* @private
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*/
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var AttributeCompression = {};
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/**
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* Encodes a normalized vector into 2 SNORM values in the range of [0-rangeMax] following the 'oct' encoding.
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*
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* Oct encoding is a compact representation of unit length vectors.
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* The 'oct' encoding is described in "A Survey of Efficient Representations of Independent Unit Vectors",
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* Cigolle et al 2014: {@link http://jcgt.org/published/0003/02/01/}
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*
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* @param {Cartesian3} vector The normalized vector to be compressed into 2 component 'oct' encoding.
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* @param {Cartesian2} result The 2 component oct-encoded unit length vector.
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* @param {Number} rangeMax The maximum value of the SNORM range. The encoded vector is stored in log2(rangeMax+1) bits.
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* @returns {Cartesian2} The 2 component oct-encoded unit length vector.
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*
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* @exception {DeveloperError} vector must be normalized.
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*
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* @see AttributeCompression.octDecodeInRange
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*/
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AttributeCompression.octEncodeInRange = function (vector, rangeMax, result) {
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//>>includeStart('debug', pragmas.debug);
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RuntimeError.Check.defined("vector", vector);
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RuntimeError.Check.defined("result", result);
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var magSquared = Matrix2.Cartesian3.magnitudeSquared(vector);
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if (Math.abs(magSquared - 1.0) > ComponentDatatype.CesiumMath.EPSILON6) {
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throw new RuntimeError.DeveloperError("vector must be normalized.");
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}
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//>>includeEnd('debug');
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result.x =
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vector.x / (Math.abs(vector.x) + Math.abs(vector.y) + Math.abs(vector.z));
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result.y =
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vector.y / (Math.abs(vector.x) + Math.abs(vector.y) + Math.abs(vector.z));
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if (vector.z < 0) {
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var x = result.x;
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var y = result.y;
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result.x = (1.0 - Math.abs(y)) * ComponentDatatype.CesiumMath.signNotZero(x);
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result.y = (1.0 - Math.abs(x)) * ComponentDatatype.CesiumMath.signNotZero(y);
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}
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result.x = ComponentDatatype.CesiumMath.toSNorm(result.x, rangeMax);
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result.y = ComponentDatatype.CesiumMath.toSNorm(result.y, rangeMax);
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return result;
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};
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/**
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* Encodes a normalized vector into 2 SNORM values in the range of [0-255] following the 'oct' encoding.
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*
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* @param {Cartesian3} vector The normalized vector to be compressed into 2 byte 'oct' encoding.
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* @param {Cartesian2} result The 2 byte oct-encoded unit length vector.
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* @returns {Cartesian2} The 2 byte oct-encoded unit length vector.
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*
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* @exception {DeveloperError} vector must be normalized.
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*
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* @see AttributeCompression.octEncodeInRange
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* @see AttributeCompression.octDecode
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*/
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AttributeCompression.octEncode = function (vector, result) {
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return AttributeCompression.octEncodeInRange(vector, 255, result);
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};
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var octEncodeScratch = new Matrix2.Cartesian2();
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var uint8ForceArray = new Uint8Array(1);
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function forceUint8(value) {
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uint8ForceArray[0] = value;
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return uint8ForceArray[0];
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}
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/**
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* @param {Cartesian3} vector The normalized vector to be compressed into 4 byte 'oct' encoding.
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* @param {Cartesian4} result The 4 byte oct-encoded unit length vector.
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* @returns {Cartesian4} The 4 byte oct-encoded unit length vector.
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*
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* @exception {DeveloperError} vector must be normalized.
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*
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* @see AttributeCompression.octEncodeInRange
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* @see AttributeCompression.octDecodeFromCartesian4
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*/
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AttributeCompression.octEncodeToCartesian4 = function (vector, result) {
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AttributeCompression.octEncodeInRange(vector, 65535, octEncodeScratch);
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result.x = forceUint8(octEncodeScratch.x * RIGHT_SHIFT);
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result.y = forceUint8(octEncodeScratch.x);
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result.z = forceUint8(octEncodeScratch.y * RIGHT_SHIFT);
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result.w = forceUint8(octEncodeScratch.y);
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return result;
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};
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/**
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* Decodes a unit-length vector in 'oct' encoding to a normalized 3-component vector.
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*
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* @param {Number} x The x component of the oct-encoded unit length vector.
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* @param {Number} y The y component of the oct-encoded unit length vector.
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* @param {Number} rangeMax The maximum value of the SNORM range. The encoded vector is stored in log2(rangeMax+1) bits.
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* @param {Cartesian3} result The decoded and normalized vector
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* @returns {Cartesian3} The decoded and normalized vector.
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*
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* @exception {DeveloperError} x and y must be unsigned normalized integers between 0 and rangeMax.
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*
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* @see AttributeCompression.octEncodeInRange
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*/
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AttributeCompression.octDecodeInRange = function (x, y, rangeMax, result) {
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//>>includeStart('debug', pragmas.debug);
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RuntimeError.Check.defined("result", result);
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if (x < 0 || x > rangeMax || y < 0 || y > rangeMax) {
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throw new RuntimeError.DeveloperError(
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"x and y must be unsigned normalized integers between 0 and " + rangeMax
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);
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}
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//>>includeEnd('debug');
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result.x = ComponentDatatype.CesiumMath.fromSNorm(x, rangeMax);
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result.y = ComponentDatatype.CesiumMath.fromSNorm(y, rangeMax);
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result.z = 1.0 - (Math.abs(result.x) + Math.abs(result.y));
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if (result.z < 0.0) {
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var oldVX = result.x;
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result.x = (1.0 - Math.abs(result.y)) * ComponentDatatype.CesiumMath.signNotZero(oldVX);
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result.y = (1.0 - Math.abs(oldVX)) * ComponentDatatype.CesiumMath.signNotZero(result.y);
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}
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return Matrix2.Cartesian3.normalize(result, result);
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};
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/**
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* Decodes a unit-length vector in 2 byte 'oct' encoding to a normalized 3-component vector.
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*
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* @param {Number} x The x component of the oct-encoded unit length vector.
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* @param {Number} y The y component of the oct-encoded unit length vector.
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* @param {Cartesian3} result The decoded and normalized vector.
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* @returns {Cartesian3} The decoded and normalized vector.
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*
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* @exception {DeveloperError} x and y must be an unsigned normalized integer between 0 and 255.
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*
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* @see AttributeCompression.octDecodeInRange
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*/
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AttributeCompression.octDecode = function (x, y, result) {
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return AttributeCompression.octDecodeInRange(x, y, 255, result);
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};
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/**
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* Decodes a unit-length vector in 4 byte 'oct' encoding to a normalized 3-component vector.
|
*
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* @param {Cartesian4} encoded The oct-encoded unit length vector.
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* @param {Cartesian3} result The decoded and normalized vector.
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* @returns {Cartesian3} The decoded and normalized vector.
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*
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* @exception {DeveloperError} x, y, z, and w must be unsigned normalized integers between 0 and 255.
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*
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* @see AttributeCompression.octDecodeInRange
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* @see AttributeCompression.octEncodeToCartesian4
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*/
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AttributeCompression.octDecodeFromCartesian4 = function (encoded, result) {
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//>>includeStart('debug', pragmas.debug);
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RuntimeError.Check.typeOf.object("encoded", encoded);
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RuntimeError.Check.typeOf.object("result", result);
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//>>includeEnd('debug');
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var x = encoded.x;
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var y = encoded.y;
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var z = encoded.z;
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var w = encoded.w;
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//>>includeStart('debug', pragmas.debug);
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if (
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x < 0 ||
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x > 255 ||
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y < 0 ||
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y > 255 ||
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z < 0 ||
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z > 255 ||
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w < 0 ||
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w > 255
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) {
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throw new RuntimeError.DeveloperError(
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"x, y, z, and w must be unsigned normalized integers between 0 and 255"
|
);
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}
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//>>includeEnd('debug');
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var xOct16 = x * LEFT_SHIFT + y;
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var yOct16 = z * LEFT_SHIFT + w;
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return AttributeCompression.octDecodeInRange(xOct16, yOct16, 65535, result);
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};
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|
/**
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* Packs an oct encoded vector into a single floating-point number.
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*
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* @param {Cartesian2} encoded The oct encoded vector.
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* @returns {Number} The oct encoded vector packed into a single float.
|
*
|
*/
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AttributeCompression.octPackFloat = function (encoded) {
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//>>includeStart('debug', pragmas.debug);
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RuntimeError.Check.defined("encoded", encoded);
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//>>includeEnd('debug');
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return 256.0 * encoded.x + encoded.y;
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};
|
|
var scratchEncodeCart2 = new Matrix2.Cartesian2();
|
|
/**
|
* Encodes a normalized vector into 2 SNORM values in the range of [0-255] following the 'oct' encoding and
|
* stores those values in a single float-point number.
|
*
|
* @param {Cartesian3} vector The normalized vector to be compressed into 2 byte 'oct' encoding.
|
* @returns {Number} The 2 byte oct-encoded unit length vector.
|
*
|
* @exception {DeveloperError} vector must be normalized.
|
*/
|
AttributeCompression.octEncodeFloat = function (vector) {
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AttributeCompression.octEncode(vector, scratchEncodeCart2);
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return AttributeCompression.octPackFloat(scratchEncodeCart2);
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};
|
|
/**
|
* Decodes a unit-length vector in 'oct' encoding packed in a floating-point number to a normalized 3-component vector.
|
*
|
* @param {Number} value The oct-encoded unit length vector stored as a single floating-point number.
|
* @param {Cartesian3} result The decoded and normalized vector
|
* @returns {Cartesian3} The decoded and normalized vector.
|
*
|
*/
|
AttributeCompression.octDecodeFloat = function (value, result) {
|
//>>includeStart('debug', pragmas.debug);
|
RuntimeError.Check.defined("value", value);
|
//>>includeEnd('debug');
|
|
var temp = value / 256.0;
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var x = Math.floor(temp);
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var y = (temp - x) * 256.0;
|
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return AttributeCompression.octDecode(x, y, result);
|
};
|
|
/**
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* Encodes three normalized vectors into 6 SNORM values in the range of [0-255] following the 'oct' encoding and
|
* packs those into two floating-point numbers.
|
*
|
* @param {Cartesian3} v1 A normalized vector to be compressed.
|
* @param {Cartesian3} v2 A normalized vector to be compressed.
|
* @param {Cartesian3} v3 A normalized vector to be compressed.
|
* @param {Cartesian2} result The 'oct' encoded vectors packed into two floating-point numbers.
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* @returns {Cartesian2} The 'oct' encoded vectors packed into two floating-point numbers.
|
*
|
*/
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AttributeCompression.octPack = function (v1, v2, v3, result) {
|
//>>includeStart('debug', pragmas.debug);
|
RuntimeError.Check.defined("v1", v1);
|
RuntimeError.Check.defined("v2", v2);
|
RuntimeError.Check.defined("v3", v3);
|
RuntimeError.Check.defined("result", result);
|
//>>includeEnd('debug');
|
|
var encoded1 = AttributeCompression.octEncodeFloat(v1);
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var encoded2 = AttributeCompression.octEncodeFloat(v2);
|
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var encoded3 = AttributeCompression.octEncode(v3, scratchEncodeCart2);
|
result.x = 65536.0 * encoded3.x + encoded1;
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result.y = 65536.0 * encoded3.y + encoded2;
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return result;
|
};
|
|
/**
|
* Decodes three unit-length vectors in 'oct' encoding packed into a floating-point number to a normalized 3-component vector.
|
*
|
* @param {Cartesian2} packed The three oct-encoded unit length vectors stored as two floating-point number.
|
* @param {Cartesian3} v1 One decoded and normalized vector.
|
* @param {Cartesian3} v2 One decoded and normalized vector.
|
* @param {Cartesian3} v3 One decoded and normalized vector.
|
*/
|
AttributeCompression.octUnpack = function (packed, v1, v2, v3) {
|
//>>includeStart('debug', pragmas.debug);
|
RuntimeError.Check.defined("packed", packed);
|
RuntimeError.Check.defined("v1", v1);
|
RuntimeError.Check.defined("v2", v2);
|
RuntimeError.Check.defined("v3", v3);
|
//>>includeEnd('debug');
|
|
var temp = packed.x / 65536.0;
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var x = Math.floor(temp);
|
var encodedFloat1 = (temp - x) * 65536.0;
|
|
temp = packed.y / 65536.0;
|
var y = Math.floor(temp);
|
var encodedFloat2 = (temp - y) * 65536.0;
|
|
AttributeCompression.octDecodeFloat(encodedFloat1, v1);
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AttributeCompression.octDecodeFloat(encodedFloat2, v2);
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AttributeCompression.octDecode(x, y, v3);
|
};
|
|
/**
|
* Pack texture coordinates into a single float. The texture coordinates will only preserve 12 bits of precision.
|
*
|
* @param {Cartesian2} textureCoordinates The texture coordinates to compress. Both coordinates must be in the range 0.0-1.0.
|
* @returns {Number} The packed texture coordinates.
|
*
|
*/
|
AttributeCompression.compressTextureCoordinates = function (
|
textureCoordinates
|
) {
|
//>>includeStart('debug', pragmas.debug);
|
RuntimeError.Check.defined("textureCoordinates", textureCoordinates);
|
//>>includeEnd('debug');
|
|
// Move x and y to the range 0-4095;
|
var x = (textureCoordinates.x * 4095.0) | 0;
|
var y = (textureCoordinates.y * 4095.0) | 0;
|
return 4096.0 * x + y;
|
};
|
|
/**
|
* Decompresses texture coordinates that were packed into a single float.
|
*
|
* @param {Number} compressed The compressed texture coordinates.
|
* @param {Cartesian2} result The decompressed texture coordinates.
|
* @returns {Cartesian2} The modified result parameter.
|
*
|
*/
|
AttributeCompression.decompressTextureCoordinates = function (
|
compressed,
|
result
|
) {
|
//>>includeStart('debug', pragmas.debug);
|
RuntimeError.Check.defined("compressed", compressed);
|
RuntimeError.Check.defined("result", result);
|
//>>includeEnd('debug');
|
|
var temp = compressed / 4096.0;
|
var xZeroTo4095 = Math.floor(temp);
|
result.x = xZeroTo4095 / 4095.0;
|
result.y = (compressed - xZeroTo4095 * 4096) / 4095;
|
return result;
|
};
|
|
function zigZagDecode(value) {
|
return (value >> 1) ^ -(value & 1);
|
}
|
|
/**
|
* Decodes delta and ZigZag encoded vertices. This modifies the buffers in place.
|
*
|
* @param {Uint16Array} uBuffer The buffer view of u values.
|
* @param {Uint16Array} vBuffer The buffer view of v values.
|
* @param {Uint16Array} [heightBuffer] The buffer view of height values.
|
*
|
* @see {@link https://github.com/CesiumGS/quantized-mesh|quantized-mesh-1.0 terrain format}
|
*/
|
AttributeCompression.zigZagDeltaDecode = function (
|
uBuffer,
|
vBuffer,
|
heightBuffer
|
) {
|
//>>includeStart('debug', pragmas.debug);
|
RuntimeError.Check.defined("uBuffer", uBuffer);
|
RuntimeError.Check.defined("vBuffer", vBuffer);
|
RuntimeError.Check.typeOf.number.equals(
|
"uBuffer.length",
|
"vBuffer.length",
|
uBuffer.length,
|
vBuffer.length
|
);
|
if (when.defined(heightBuffer)) {
|
RuntimeError.Check.typeOf.number.equals(
|
"uBuffer.length",
|
"heightBuffer.length",
|
uBuffer.length,
|
heightBuffer.length
|
);
|
}
|
//>>includeEnd('debug');
|
|
var count = uBuffer.length;
|
|
var u = 0;
|
var v = 0;
|
var height = 0;
|
|
for (var i = 0; i < count; ++i) {
|
u += zigZagDecode(uBuffer[i]);
|
v += zigZagDecode(vBuffer[i]);
|
|
uBuffer[i] = u;
|
vBuffer[i] = v;
|
|
if (when.defined(heightBuffer)) {
|
height += zigZagDecode(heightBuffer[i]);
|
heightBuffer[i] = height;
|
}
|
}
|
};
|
|
/**
|
* Dequantizes a quantized typed array into a floating point typed array.
|
*
|
* @see {@link https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_mesh_quantization#encoding-quantized-data}
|
*
|
* @param {Int8Array|Uint8Array|Int16Array|Uint16Array|Int32Array|Uint32Array} typedArray The typed array for the quantized data.
|
* @param {ComponentDatatype} componentDatatype The component datatype of the quantized data.
|
* @param {AttributeType} type The attribute type of the quantized data.
|
* @param {Number} count The number of attributes referenced in the dequantized array.
|
*
|
* @returns {Float32Array} The dequantized array.
|
*/
|
AttributeCompression.dequantize = function (
|
typedArray,
|
componentDatatype,
|
type,
|
count
|
) {
|
//>>includeStart('debug', pragmas.debug);
|
RuntimeError.Check.defined("typedArray", typedArray);
|
RuntimeError.Check.defined("componentDatatype", componentDatatype);
|
RuntimeError.Check.defined("type", type);
|
RuntimeError.Check.defined("count", count);
|
//>>includeEnd('debug');
|
|
var componentsPerAttribute = AttributeType$1.getNumberOfComponents(type);
|
|
var divisor;
|
switch (componentDatatype) {
|
case ComponentDatatype.ComponentDatatype.BYTE:
|
divisor = 127.0;
|
break;
|
case ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE:
|
divisor = 255.0;
|
break;
|
case ComponentDatatype.ComponentDatatype.SHORT:
|
divisor = 32767.0;
|
break;
|
case ComponentDatatype.ComponentDatatype.UNSIGNED_SHORT:
|
divisor = 65535.0;
|
break;
|
case ComponentDatatype.ComponentDatatype.INT:
|
divisor = 2147483647.0;
|
break;
|
case ComponentDatatype.ComponentDatatype.UNSIGNED_INT:
|
divisor = 4294967295.0;
|
break;
|
//>>includeStart('debug', pragmas.debug);
|
default:
|
throw new RuntimeError.DeveloperError(
|
"Cannot dequantize component datatype: " + componentDatatype
|
);
|
//>>includeEnd('debug');
|
}
|
|
var dequantizedTypedArray = new Float32Array(count * componentsPerAttribute);
|
|
for (var i = 0; i < count; i++) {
|
for (var j = 0; j < componentsPerAttribute; j++) {
|
var index = i * componentsPerAttribute + j;
|
dequantizedTypedArray[index] = Math.max(
|
typedArray[index] / divisor,
|
-1.0
|
);
|
}
|
}
|
|
return dequantizedTypedArray;
|
};
|
|
exports.AttributeCompression = AttributeCompression;
|
|
}));
|
