alienscale_ps14.psh

hl2 source code. Do not use it illegal.

ps.1.4

def c0, 1.0f, 1.0f, 1.0f, 0.5f
def c1, 0.0f, 0.0f, 0.0f, 0.0f

texld r2, t1			; normal map
texld r3, t2			; normalization cubemap for camera direction
texcrd r1.xyz, t3			; r1, r4, r5 contain tangent->world transform
texcrd r4.xyz, t4
texcrd r5.xyz, t5

; transform the normal into world space
dp3 r0.r, r1, r2_bx2
dp3 r0.g, r4, r2_bx2
dp3 r0.b, r5, r2_bx2

dp3_sat r1.a, r3_bx2, r0	; r1 = component of normalmap along world->eye vector
sub r0.a, r1.a, r2.a	; r0 = r1 - t2.a
cmp r0, r0.a, c0, c1
mul_sat r2, r0, r1		; This effectively blats out values of r0 < t2.a

phase

texld r0, t0			; albedo 1
texld r1, t0			; albedo 2

lrp	r0, r2.r, r1, r0	; choose between albedo 1 + albedo 2 based on dot product
mul r0, r0, v0			; Factor in lighting + modulation color