lightmappedgeneric_multiplybylightingselfillum.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
;------------------------------------------------------------------------------

def c2, 1.0f, 1.0f, 1.0f, 1.0f

tex t0
tex t1

; Blend between white and lightmap color based on total alpha

mul_x2 r1.rgb, c0, t1		; Apply overbright to lightmap
+ mov_sat r1.a, v0				; opacity == vertex opacity (no alpha in texture)

lrp r0.rgb, t0.a, c1, r1	; Blend between self-illum + lightmap
+ mov r0.a, c2.a

lrp r0.rgb, r1.a, r0, c2	; interpolate between white + color