Question by Gumis · Apr 30, 2015 at 10:43 PM · android shader shaders cg

Shader works differently on Android (OpenGL) and Editor (DX11)

I wrote circular cutout sprite shader which works ok in editor & standalone version but behaves incorrectly on Android devices.

In essence it's simple pixel shader:

 fixed4 frag(pixelData IN) : SV_Target
 {
     const float PI = 3.1415;
     float angle = -atan2(IN.texcoord.x - 0.5, -IN.texcoord.y + 0.5) + PI;
             
     if (angle < _Percent * 2 * PI) //_Percent is in range from 0 to 1        
         return tex2D(_MainTex, IN.texcoord) * IN.color;            
     else
         return float4(1,1,1,0);            
 }

Rendering in editor (DX11 on DX9 GPU)

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