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72 lines
2 KiB
NASM
72 lines
2 KiB
NASM
ps.1.4
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// conversion from Cg generated ARB_fragment_program to ps.1.4 by NFZ
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// command line args: -profile arbfp1 -entry main_fp
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// program main_fp
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// c0 : distortionRange
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// c1 : tintColour
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// testure 0 : noiseMap
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// texture 1 : reflectMap
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// texture 2 : refractMap
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// v0.x : fresnel
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// t0.xyz : noiseCoord
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// t1.xyw : projectionCoord
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def c2, 2, 1, 0, 0
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// Cg: distort.x = tex3D(noiseMap, noiseCoord).x;
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// arbfp1: TEX R0.x, fragment.texcoord[0], texture[0], 3D;
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// sample noise map using noiseCoord in TEX unit 0
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texld r0, t0.xyz
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// get projected texture coordinates from TEX coord 1
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// will be used in phase 2
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texcrd r1.xy, t1_dw.xyw
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mov r1.z, c2.y
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// Cg: distort.y = tex3D(noiseMap, noiseCoord + yoffset).x;
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// arbfp1: ADD R1.xyz, fragment.texcoord[0], c1;
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// arbfp1: TEX R1.x, R1, texture[0], 3D;
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// arbfp1: MOV R0.y, R1.x;
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// Cg: distort = (distort * 2 - 1) * distortionRange;
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// arbfp1: MAD R0.xy, R0, c0.x, -c0.y;
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// arbfp1: MUL R0.xy, R0, u0.x;
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// (distort * 2 - 1) same as 2*(distort -.5) so use _bx2
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// Cg: final = projectionCoord.xy / projectionCoord.w;
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// Cg: final += distort;
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// arbfp1: RCP R0.w, fragment.texcoord[1].w;
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// arbfp1: MAD R0.xy, fragment.texcoord[1], R0.w, R0;
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// final = (distort * projectionCoord.w) + projectionCoord.xy
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// for ps.1.4 have to re-arrange things a bit to perturb projected texture coordinates
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mad r0.xyz, r0_bx2, c0.x, r1
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phase
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// do dependant texture reads
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// Cg: reflectionColour = tex2D(reflectMap, final);
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// arbfp1: TEX R0, R0, texture[1], 2D;
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// sampe reflectMap using dependant read : texunit 1
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texld r1, r0.xyz
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// Cg: refractionColour = tex2D(refractMap, final) + tintColour;
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// arbfp1: TEX R1, R0, texture[2], 2D;
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// sample refractMap : texunit 2
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texld r2, r0.xyz
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// adding tintColour that is in global c1
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// arbfp1: ADD R1, R1, u1;
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add r2, r2, c1
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// Cg: col = lerp(refractionColour, reflectionColour, fresnel);
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// arbfp1: ADD R0, R0, -R1;
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// arbfp1: MAD result.color, fragment.color.primary.x, R0, R1;
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lrp r0, v0.x, r1, r2
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