Add existing to tracked

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

@@ -0,0 +1,12 @@
+in vec4 position;
+in float webMercatorT;
+
+uniform vec2 u_textureDimensions;
+
+out vec2 v_textureCoordinates;
+
+void main()
+{
+    v_textureCoordinates = vec2(position.x, webMercatorT);
+    gl_Position = czm_viewportOrthographic * (position * vec4(u_textureDimensions, 1.0, 1.0));
+}