// 2D texgen for jitter (texture adjustment matrix)
void CRenderTarget::u_compute_texgen_jitter (Fmatrix& m_Texgen_J)
{
// place into 0..1 space
Fmatrix m_TexelAdjust =
{
0.5f, 0.0f, 0.0f, 0.0f,
0.0f, -0.5f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.0f, 1.0f
};
m_Texgen_J.mul (m_TexelAdjust,RCache.xforms.m_wvp);
// rescale - tile it
float scale_X = float(Device.dwWidth) / float(TEX_jitter);
float scale_Y = float(Device.dwHeight)/ float(TEX_jitter);
float offset = (.5f / float(TEX_jitter));
m_TexelAdjust.scale (scale_X, scale_Y,1.f );
m_TexelAdjust.translate_over(offset, offset, 0 );
m_Texgen_J.mulA_44 (m_TexelAdjust);
}
