27 lines
721 B
Plaintext
27 lines
721 B
Plaintext
ps.1.1
|
|
|
|
; t0:
|
|
; texture: dudv map
|
|
; texcoords: dudvmap texcoords
|
|
; t1:
|
|
; texture: reflection render target
|
|
; texcoords:
|
|
; t2:
|
|
; texture: normal map (usef for fresnel calculation)
|
|
; texcoords:
|
|
; t4: texture: normalization cube map
|
|
; texcoords: eye vect
|
|
|
|
tex t0 ; sample dudv map
|
|
texbem t1, t0 ; reflection
|
|
tex t2 ; normal map
|
|
tex t3 ; eye vector (through normalization cubemap)
|
|
|
|
; dot eye-vector with per-pixel normal from t2
|
|
dp3_sat r1.rgba, t3_bx2, t2_bx2
|
|
|
|
; run Fresnel approx. on it: R0 + (1-R0) (1-cos(q))^5
|
|
mul r0.a, 1-r1.a, 1-r1.a // squared
|
|
mul r0.a, r0.a, r0.a // quartic
|
|
mul r0.rgb, t1, c0 // shove color from reflection render target into r0
|
|
+mul_sat r0.a, r0.a, 1-r1.a // quintic |