|
public GetCubeShaderResource ( int mipLevel ) : |
||
| mipLevel | int | |
| return | ||
/// <summary>
///
/// </summary>
/// <param name="dst"></param>
/// <param name="cubeSrc"></param>
/// <param name="sampleCount"></param>
public void PrefilterEnvMap ( RenderTargetCube envMap )
{
SetDefaultRenderStates();
int width = envMap.Width / 2;
int height = envMap.Height / 2;
using( new PixEvent("PrefilterEnvMap") ) {
var sides = new[]{ ShaderFlags.PREFILTER_ENVMAP | ShaderFlags.POSX, ShaderFlags.PREFILTER_ENVMAP | ShaderFlags.NEGX,
ShaderFlags.PREFILTER_ENVMAP | ShaderFlags.POSY, ShaderFlags.PREFILTER_ENVMAP | ShaderFlags.NEGY,
ShaderFlags.PREFILTER_ENVMAP | ShaderFlags.POSZ, ShaderFlags.PREFILTER_ENVMAP | ShaderFlags.NEGZ };
// loop through mip levels from second to last specular mip level :
for (int mip=1; mip<RenderSystem.EnvMapSpecularMipCount; mip++) {
float roughness = (float)mip / (float)(RenderSystem.EnvMapSpecularMipCount-1);
float step = 1.0f / width;
vectorCB.SetData( new Vector4( roughness, step,0,0 ) );
for (int face=0; face<6; face++) {
rs.SetTargets( null, envMap.GetSurface( mip, (CubeFace)face ) );
rs.SetViewport( 0,0, width, height );
rs.PixelShaderConstants[0] = vectorCB;
rs.PipelineState = factory[ (int)sides[face] ];
rs.VertexShaderResources[0] = envMap.GetCubeShaderResource( mip-1 );
rs.PixelShaderResources[0] = envMap.GetCubeShaderResource( mip-1 );
rs.PixelShaderSamplers[0] = SamplerState.LinearWrap;
rs.VertexShaderConstants[0] = matrixCB;
rs.Draw( 3, 0 );
}
width /= 2;
height /= 2;
}
}
rs.ResetStates();
}
