singlecolumn.cg

基于GPU进行快速科学计算

void mins( varying float2 elem2d : WPOS,
                   uniform samplerRECT reals : texunit2,
		   uniform samplerRECT imags : texunit3,
		   float2 coords0 : TEXCOORD0, float2 coords1 : TEXCOORD1,  
		   float2 angle12: TEXCOORD3, float2 angle34: TEXCOORD4,
		   out float4 realoutput : COLOR0, out float4 imagoutput : COLOR1)
{
  float4 angle = angle12.xyxy;
  angle.zw = angle34.xy;

  float4 cosangle = cos(angle);
  float4 sinangle = sin(angle);

  float cmp1 = frac(coords0.y) > 0.5 ? -1:1;
  
  float4 real0 = f4texRECT(reals, coords0);
  float4 real1 = f4texRECT(reals, coords1);

  float4 imag0 = f4texRECT(imags, coords0);
  float4 imag1 = f4texRECT(imags, coords1);

  realoutput = real0 + cmp1 * (real1 * cosangle - imag1*sinangle);
  imagoutput = imag0 + cmp1 * (imag1 * cosangle + real1*sinangle);
  
}