Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

40 lines
1.2 KiB

5 years ago
ps.1.4
;------------------------------------------------------------------------------
; Phase 1
;------------------------------------------------------------------------------
; 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)
; Alpha gets lost after phase marker, so store it here
mov r5, r0.a
;------------------------------------------------------------------------------
; Phase 2
;------------------------------------------------------------------------------
phase
; Sample environment map
texld r3, r2
; Result goes in output color (multiply by constant color c0)
mul r0.rgb, r3, c0
+mov r0.a, c0.a
mul r1.rgb, r0, r0
lrp r0.rgb, c1, r1, r0 ; blend between color and color * color
dp3 r1.rgb, r0, c3
lrp r0.rgb, c2, r0, r1 ; blend between color and greyscale