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97 lines
1.5 KiB
97 lines
1.5 KiB
5 years ago
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; STATIC: "REFLECT" "0..1"
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; STATIC: "REFRACT" "0..1"
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ps.1.4
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; T2 - refraction
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; T3 - normal map
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; T4 - reflection
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; TC0 - normal map coords
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; TC1 - proj tex coords (reflection)
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; TC2 - proj tex coords (refraction)
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; TC3 - tangent space view vec
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; TC4 - displacement scale
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; sample normal map
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texld r3, t0
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#if REFLECT
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; reflection coords
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texcrd r4.xy, t1_dw.xyw
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#endif
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#if REFRACT
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; refraction coords
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texcrd r2.xy, t2_dw.xyw
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#endif
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; tangent space eye vector
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texld r1, t5 ; <---- Normalizing CUBE MAP here!!!
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; reflection/refraction scale (x,y)
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texcrd r0.xyz, t4.xyz
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; perturb coords by constant displacement
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; and by normal map alpha (which has 1/(2**miplevel in it)
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mul r0.rg, r0, r3.a
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#if REFLECT
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mad r4.rg, r3_bx2, r0.x, r4
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#endif
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#if REFRACT
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mad r2.rg, r3_bx2, r0.y, r2
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#endif
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; stuff something into z so that texld will deal
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#if REFLECT
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mov r4.b, c5
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#endif
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#if REFRACT
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mov r2.b, c5
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#endif
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phase
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#if REFLECT
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; reflection
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texld r4, r4
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#endif
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#if REFRACT
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; refraction
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texld r2, r2
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#endif
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#if REFLECT
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; N.V
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dp3_sat r1.a, r3_bx2, r1_bx2
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#endif
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#if REFRACT
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; tint refraction
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mul r2.rgb, r2, c1
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#endif
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#if REFLECT
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; tint reflction
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mul r4.rgb, r4, c4
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; (1-N.V) ^ 5
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+mul r0.a, 1-r1.a, 1-r1.a
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mul r0.a, r0.a, r0.a
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mul_sat r0.a, r0.a, 1-r1.a
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#endif
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#if !REFLECT && !REFRACT
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; This is wrong!!!!
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mov r0.rgba, c0
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#endif
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#if !REFLECT && REFRACT
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mov r0.rgba, r2
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#endif
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#if REFLECT && !REFRACT
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mov r0.rgba, r4
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#endif
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#if REFLECT && REFRACT
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; reflection * fresnel + refraction * ( 1 - fresnel )
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lrp r0.rgba, r0.a, r4, r2
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#endif
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