Introduction to the DirectX 9 Shader Models - Nvidia
Introduction to the DirectX 9 Shader Models - Nvidia
Introduction to the DirectX 9 Shader Models - Nvidia
SHOW LESS
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Pixel <strong>Shader</strong> Predication – 2x2<br />
Shadow Testing<br />
def c0, 0.0f, 0.0f, 0.0f, 0.0f<br />
def c1, 1.0f, 1.0f, 1.0f, 1.0f<br />
. . .<br />
sub_sat r0, r0, r1 // compare 4 values<br />
dp4<br />
r0, r0, c1 // sum <strong>the</strong> result<br />
mov r2, c2<br />
// ambient light<br />
setp_gt p0, r0, c0 // set predication<br />
p0 add r2, r2, c3<br />
// conditionally add lighting
Change language