Add existing to tracked

node_modules/@cesium/engine/Source/Shaders/PolylineShadowVolumeMorphFS.glsl

@@ -0,0 +1,45 @@
+in vec3 v_forwardDirectionEC;
+in vec3 v_texcoordNormalizationAndHalfWidth;
+in float v_batchId;
+
+#ifdef PER_INSTANCE_COLOR
+in vec4 v_color;
+#else
+in vec2 v_alignedPlaneDistances;
+in 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
+    out_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);
+    out_FragColor = vec4(material.diffuse + material.emission, material.alpha);
+#endif // PER_INSTANCE_COLOR
+}