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
;------------------------------------------------------------------------------
tex t0
tex t1
; Blend between grey and lightmap color based on total alpha
def c2, 0.5f, 0.5f, 0.5f, 1.0f
mul_x2 r1.rgb, c0, t1 ; Apply overbright to lightmap
+ mov r1.a, v0 ; vertex alpha
lrp r0, r1.a, r1, c2 ; interpolate between grey + color