1 files changed, 66 insertions, 0 deletions
diff --git a/sp/src/materialsystem/stdshaders/LightmappedGeneric_BumpmappedEnvmap.psh b/sp/src/materialsystem/stdshaders/LightmappedGeneric_BumpmappedEnvmap.psh
new file mode 100644
index 00000000..ba349187
--- /dev/null
+++ b/sp/src/materialsystem/stdshaders/LightmappedGeneric_BumpmappedEnvmap.psh
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+; STATIC: "NORMALMAPALPHAENVMAPMASK" "0..1"
+ps.1.1
+
+;------------------------------------------------------------------------------
+; Environment mapping on a bumped surface
+; t0 - Normalmap
+; t3 - Cube environment map (*must* be a cube map!)
+;
+; c0 - color to multiply the results by
+; c1 - envmap contrast
+; c2 - envmap saturation
+; c3 - grey weights
+; c4 - fresnel amount
+; Input texture coords required here are a little wonky.
+; tc0.uv <- U,V into the normal map
+; tc1.uvw, tc2.uvw, tc3.uvw <- 3x3 matrix transform 
+;								from tangent space->env map space
+; tc1.q, tc2.q, tc3.q <- eye vector in env map space
+;------------------------------------------------------------------------------
+
+; Get the 3-vector from the normal map
+tex t0
+
+; Perform matrix multiply to get a local normal bump.  Then
+; reflect the eye vector through the normal and sample from 
+; a cubic environment map.
+texm3x3pad t1, t0_bx2
+texm3x3pad t2, t0_bx2		
+texm3x3vspec t3, t0_bx2
+
+; FIXME FIXME - Need to do specialized versions of this with and without:
+; - constant color
+; - fresnel amount of exactly 0 or 1 or in between
+; - envmap contrast of 0, 1, or in between
+; - envmap saturation of 0, 1, or in between
+
+; r0 = constant color * result of bump into envmap
+mul r0.rgb, t3, c0
+
+; dot eye-vector with per-pixel normal from t0
+dp3_sat	r1, v0_bx2, t0_bx2
+
+; run Fresnel approx. on it: R0 + (1-R0) (1-cos(q))^5 in alpha channel
+mul r1.rgb, r0, r0					; color squared
++mul r0.a, 1-r1.a, 1-r1.a			; squared
+
+lrp r0.rgb, c1, r1, r0				; blend between color and color * color
++mul r0.a, r0.a, r0.a				; quartic
+
+dp3 r1.rgb, r0, c3				; color greyscaled
++mul r0.a, r0.a, 1-r1.a				; quintic
+
+; FIXME - these should be able to pair (I think), but don't on nvidia for some reason.
+; (I think) cannot pair due to use of >2 constants in single stage
+lrp	r0.rgb, c2, r0, r1 			; blend between color and greyscale
+mad r0.a, r0.a, c6.a, c4.a			; Take Fresnel R(0) into consideration
+
+mul r0.rgb, r0, r0.a				; multiply output color by result of fresnel calc
+
+#if NORMALMAPALPHAENVMAPMASK
++mul r0.a, c0.a, t0.a				; Fade amount * alpha from the texture
+#else
++mov r0.a, c0.a					; Just use the fade amount
+#endif
+
+