You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

64 lines
1.8 KiB

//ps.1.1
// def c0, 1.0, 0.0, 0.0, 1.0
// mov r0, c0
// Short pixel shader. Use the texm3x3vspec to do a per-pixel
// reflected lookup into our environment map.
// Input:
// t0 - Normal map in tangent space. Apply _bx2 modifier to shift
// [0..255] -> [-1..1]
// t1 - UVW = tangent + eye2pos.x, map ignored.
// t2 - UVW = binormal + eye2pos.y, map ignored
// t3 - UVW = normal + eye2pos.z, map = environment cube map
// v0 - attenuating color/alpha.
// See docs on texm3x3vspec for explanation of the eye2pos wackiness.
// Output:
// r0 = reflected lookup from environment map X input v0.
// Since environment map has alpha = 255, the output of this
// shader can be used for either alpha or additive blending,
// as long as v0 is fed in appropriately.
ps.1.1
//def c0, 1.0, 1.0, 1.0, 1.0 // Temp Hack
//def c1, 2.0, 2.0, 2.0, 1.0
//texcoord t0;
//texcoord t1;
//texcoord t2;
//texcoord t3;
tex t0 // Bind texture in stage 0 to register t0.
texm3x3pad t1, t0_bx2 // First row of matrix multiply.
texm3x3pad t2, t0_bx2 // Second row of matrix multiply.
texm3x3vspec t3, t0_bx2 // Third row of matrix multiply to get a 3-vector.
// Reflect 3-vector by the eye-ray vector.
// Use reflected vector to do a texture lookup
// at stage 3.
// t3 now has our reflected environment map value
// We've (presumably) attenuated the effect on a vertex basis
// and have our color w/ attenuated alpha in v0. So all we need
// is to multiply t3 by v0 into r0 and we're done.
mad r0.rgb, t3, v1, v0;
//add r0.rgb, t3, v0;
+mov r0.a, v1;
//mov r0.rgb, v1.a; // HACKAGE
//mov r0.a, v1.a; // HACKAGE
//mov r0, v1; // HACKAGE
//mov r0, c0
//mul r0, r0, t0;
//mov r0, v1;
//mov r0, t3;
//mov r0.rgb, t3;
//+mov r0.a, c0;