Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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5 years ago
ps.1.1
;------------------------------------------------------------------------------
; Draw a texture . . woo hoo!
; t0 - texture
;
; The texture coordinates need to be defined as follows:
; tc0 - texcoords
; c2 - envmaptint
;------------------------------------------------------------------------------
tex t0 ; base color
tex t1 ; cube map
tex t2 ; envmap mask
tex t3 ; detail texture
; version 1: applies the mod2x *after* environment map
;mul r0.rgb, t1, 1-t2.a ; can't use mad cause can't use 3 texture registers
;mul r0.rgb, c2, r0 ; apply the envmaptint
;mad r0.rgb, t0, v0, r0
;+ mul r0.a, t0, v0
;mul_x2 r0.rgb, r0, t3 ; mod2x detail texture
; version 2: applies the mod2x *before* environment map
mul r0, t0, v0 ; Base times modulation color
mul_x2 r0.rgb, r0, t3 ; mod2x detail texture
mul r1, t1, 1-t2.a ; Have to invert the alpha for basealpha (feh!)
mul r1, c2, r1 ; apply the envmaptint
add r0.rgb, r0, r1 ; add in the envmap