lightmappedgeneric_multiplybylightingbasealphamaskedselfillum.psh

hl2 source code. Do not use it illegal.

ps.1.1

;------------------------------------------------------------------------------
; Draw a texture . . woo hoo!
; t0 - texture
;
; The texture coordinates need to be defined as follows:
; tc0 - texcoords
;------------------------------------------------------------------------------

tex t0
tex t1

; Blend between grey and lightmap color based on total alpha

def c0 0.5f 0.5f 0.5f 1.0f

mul_x2 r1.rgb, c0, t1		; Apply overbright to lightmap
+ mul r1.a, t0, v0			; base times vertex alpha
; GR - workaround for const/lerp issues
mul r0.rgb, c1, t0			; Self illum * tint
+mul_sat r0.a, c1, t0
lrp r1.rgb, t0.a, r1, r0	; Blend between self-illum + lightmap
lrp r0, r1.a, r1, c0		; interpolate between grey + color