Team Fortress 2 Source Code as on 22/4/2020
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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 maptexbem t1, t0 ; reflectiontex t2 ; normal maptex t3 ; eye vector (through normalization cubemap)
; dot eye-vector with per-pixel normal from t2dp3_sat r1.rgba, t3_bx2, t2_bx2
; run Fresnel approx. on it: R0 + (1-R0) (1-cos(q))^5mul r0.a, 1-r1.a, 1-r1.a // squaredmul r0.a, r0.a, r0.a // quarticmul 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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