Add existing to tracked

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

@@ -0,0 +1,24 @@
+in vec3 position;
+out vec3 v_textureCoordinates;
+
+uniform vec3 u_faceDirection;
+
+vec3 getCubeMapDirection(vec2 uv, vec3 faceDir) {
+    vec2 scaledUV = uv;
+
+    if (faceDir.x != 0.0) {
+        return vec3(faceDir.x, scaledUV.y, scaledUV.x * faceDir.x);
+    } else if (faceDir.y != 0.0) {
+        return vec3(scaledUV.x, -faceDir.y, -scaledUV.y * faceDir.y);
+    } else {
+        return vec3(scaledUV.x * faceDir.z, scaledUV.y, -faceDir.z); 
+    }
+}
+
+void main() 
+{
+    v_textureCoordinates = getCubeMapDirection(position.xy, u_faceDirection);
+    v_textureCoordinates.y = -v_textureCoordinates.y;
+    v_textureCoordinates.z = -v_textureCoordinates.z;
+    gl_Position = vec4(position, 1.0);
+}