| 1 | ps.1.4 |
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| 2 | // conversion from Cg generated ARB_fragment_program to ps.1.4 by NFZ |
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| 3 | // command line args: -profile arbfp1 -entry main_fp |
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| 4 | // program main_fp |
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| 5 | // c0 : distortionRange |
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| 6 | // c1 : tintColour |
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| 7 | // testure 0 : noiseMap |
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| 8 | // texture 1 : reflectMap |
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| 9 | // texture 2 : refractMap |
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| 10 | // v0.x : fresnel |
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| 11 | // t0.xyz : noiseCoord |
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| 12 | // t1.xyw : projectionCoord |
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| 13 | |
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| 14 | def c2, 2, 1, 0, 0 |
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| 15 | |
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| 16 | // Cg: distort.x = tex3D(noiseMap, noiseCoord).x; |
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| 17 | // arbfp1: TEX R0.x, fragment.texcoord[0], texture[0], 3D; |
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| 18 | // sample noise map using noiseCoord in TEX unit 0 |
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| 19 | |
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| 20 | texld r0, t0.xyz |
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| 21 | |
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| 22 | // get projected texture coordinates from TEX coord 1 |
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| 23 | // will be used in phase 2 |
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| 24 | |
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| 25 | texcrd r1.xy, t1_dw.xyw |
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| 26 | mov r1.z, c2.y |
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| 27 | |
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| 28 | // Cg: distort.y = tex3D(noiseMap, noiseCoord + yoffset).x; |
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| 29 | // arbfp1: ADD R1.xyz, fragment.texcoord[0], c1; |
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| 30 | // arbfp1: TEX R1.x, R1, texture[0], 3D; |
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| 31 | // arbfp1: MOV R0.y, R1.x; |
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| 32 | |
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| 33 | // Cg: distort = (distort * 2 - 1) * distortionRange; |
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| 34 | // arbfp1: MAD R0.xy, R0, c0.x, -c0.y; |
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| 35 | // arbfp1: MUL R0.xy, R0, u0.x; |
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| 36 | // (distort * 2 - 1) same as 2*(distort -.5) so use _bx2 |
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| 37 | |
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| 38 | |
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| 39 | // Cg: final = projectionCoord.xy / projectionCoord.w; |
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| 40 | // Cg: final += distort; |
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| 41 | // arbfp1: RCP R0.w, fragment.texcoord[1].w; |
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| 42 | // arbfp1: MAD R0.xy, fragment.texcoord[1], R0.w, R0; |
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| 43 | // final = (distort * projectionCoord.w) + projectionCoord.xy |
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| 44 | // for ps.1.4 have to re-arrange things a bit to perturb projected texture coordinates |
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| 45 | |
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| 46 | mad r0.xyz, r0_bx2, c0.x, r1 |
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| 47 | |
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| 48 | phase |
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| 49 | |
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| 50 | // do dependant texture reads |
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| 51 | // Cg: reflectionColour = tex2D(reflectMap, final); |
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| 52 | // arbfp1: TEX R0, R0, texture[1], 2D; |
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| 53 | // sampe reflectMap using dependant read : texunit 1 |
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| 54 | |
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| 55 | texld r1, r0.xyz |
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| 56 | |
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| 57 | // Cg: refractionColour = tex2D(refractMap, final) + tintColour; |
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| 58 | // arbfp1: TEX R1, R0, texture[2], 2D; |
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| 59 | // sample refractMap : texunit 2 |
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| 60 | |
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| 61 | texld r2, r0.xyz |
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| 62 | |
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| 63 | // adding tintColour that is in global c1 |
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| 64 | // arbfp1: ADD R1, R1, u1; |
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| 65 | |
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| 66 | add r2, r2, c1 |
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| 67 | |
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| 68 | // Cg: col = lerp(refractionColour, reflectionColour, fresnel); |
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| 69 | // arbfp1: ADD R0, R0, -R1; |
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| 70 | // arbfp1: MAD result.color, fragment.color.primary.x, R0, R1; |
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| 71 | |
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| 72 | lrp r0, v0.x, r1, r2 |
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