Add existing to tracked

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

@@ -0,0 +1,39 @@
+#ifdef USE_FLOAT64
+in vec3 positionHigh;
+in vec3 positionLow;
+#else
+in vec3 position;
+#endif
+in vec4 pickColor;
+in vec3 showColorAlpha;
+
+out vec4 v_pickColor;
+out vec4 v_color;
+
+void main()
+{
+    float show = showColorAlpha.x;
+    vec4 color = czm_decodeRGB8(showColorAlpha.y);
+    float alpha = showColorAlpha.z;
+
+    ///////////////////////////////////////////////////////////////////////////
+
+#ifdef USE_FLOAT64
+    vec4 p = czm_translateRelativeToEye(positionHigh, positionLow);
+    vec4 positionEC = czm_modelViewRelativeToEye * p;
+#else
+    vec4 positionEC = czm_modelView * vec4(position, 1.0);
+#endif
+
+    ///////////////////////////////////////////////////////////////////////////
+
+    gl_Position = czm_projection * positionEC;
+    czm_vertexLogDepth();
+
+    v_pickColor = pickColor / 255.0;
+
+    v_color = color;
+    v_color.a *= alpha * show;
+
+    gl_Position *= show;
+}