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ps.1.4
; Get the 3-vector from the normal map
texld r0, t0
; Get environment matrix
texcrd r1.rgb, t1
texcrd r2.rgb, t2
texcrd r3.rgb, t3
; Normalize eye-ray vector through normalizer cube map
texld r4, t4 ; <---- CUBE MAP here!!!
; Transform normal
dp3 r5.r, r1, r0_bx2
dp3 r5.g, r2, r0_bx2
dp3 r5.b, r3, r0_bx2
; Reflection calculatiom
dp3_x2 r3.rgb, r5, r4_bx2 ; 2(N.Eye)
mul r3.rgb, r5, r3 ; 2N(N.Eye)
dp3 r2.rgb, r5, r5 ; N.N
mad r2.rgb, -r4_bx2, r2, r3 ; 2N(N.Eye) - Eye(N.N)
phase
; Sample environment map
texld r3, r2
; multiply color by reflecttint
mul r0.rgb, r3, c1
+mov_sat r0.a, v0.a ; Necessary since v0.a may be negative
add_sat r0.a, c1.a, r0.a
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