Question by christianterrence · Jan 24, 2018 at 09:50 AM · texture rendertexture vuforia compute shader

Black Screen in Android when calling compute shader dispatch in Update

Hello,

I am trying to create a real time GPU Ray Tracer embedded in Augmented Reality using the Vuforia SDK. The ray tracer is done by rendering a texture on a Raw Image object nested inside a Canvas object.

It works fine in android when no augmented reality objects are used but when I embed the canvas on an ImageTarget in Vuforia, the splash screen appears but the screen remains blank.

After some debugging, I sniffed out that the bug is caused by the Compute Shader dispatch being called from the update function.

 private void Update() {
     UpdateTextureSize ();
     shader.SetFloat ("globalTime", Time.time);
     shader.Dispatch (0, numThreadGroupsX, numThreadGroupsY, numThreadGroupsZ);
 }

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