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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
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