varying vec3 v_forwardDirectionEC;
|
varying vec3 v_texcoordNormalizationAndHalfWidth;
|
varying float v_batchId;
|
|
#ifdef PER_INSTANCE_COLOR
|
varying vec4 v_color;
|
#else
|
varying vec2 v_alignedPlaneDistances;
|
varying float v_texcoordT;
|
#endif
|
|
float rayPlaneDistanceUnsafe(vec3 origin, vec3 direction, vec3 planeNormal, float planeDistance) {
|
// We don't expect the ray to ever be parallel to the plane
|
return (-planeDistance - dot(planeNormal, origin)) / dot(planeNormal, direction);
|
}
|
|
void main(void)
|
{
|
vec4 eyeCoordinate = gl_FragCoord;
|
eyeCoordinate /= eyeCoordinate.w;
|
|
#ifdef PER_INSTANCE_COLOR
|
gl_FragColor = czm_gammaCorrect(v_color);
|
#else // PER_INSTANCE_COLOR
|
// Use distances for planes aligned with segment to prevent skew in dashing
|
float distanceFromStart = rayPlaneDistanceUnsafe(eyeCoordinate.xyz, -v_forwardDirectionEC, v_forwardDirectionEC.xyz, v_alignedPlaneDistances.x);
|
float distanceFromEnd = rayPlaneDistanceUnsafe(eyeCoordinate.xyz, v_forwardDirectionEC, -v_forwardDirectionEC.xyz, v_alignedPlaneDistances.y);
|
|
// Clamp - distance to aligned planes may be negative due to mitering
|
distanceFromStart = max(0.0, distanceFromStart);
|
distanceFromEnd = max(0.0, distanceFromEnd);
|
|
float s = distanceFromStart / (distanceFromStart + distanceFromEnd);
|
s = (s * v_texcoordNormalizationAndHalfWidth.x) + v_texcoordNormalizationAndHalfWidth.y;
|
|
czm_materialInput materialInput;
|
|
materialInput.s = s;
|
materialInput.st = vec2(s, v_texcoordT);
|
materialInput.str = vec3(s, v_texcoordT, 0.0);
|
|
czm_material material = czm_getMaterial(materialInput);
|
gl_FragColor = vec4(material.diffuse + material.emission, material.alpha);
|
#endif // PER_INSTANCE_COLOR
|
}
|
