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December 18, 2015 13:59
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Beckmann HLSL test
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| float beckmann1(float m : M, float NdotH : NDOTH) : SV_Target0 | |
| { | |
| float oneOverMSquared = 1.0 / (m*m); | |
| float NdotHSquared = NdotH * NdotH; | |
| return exp((NdotHSquared - 1.0) / NdotHSquared * oneOverMSquared) * oneOverMSquared * (1.0 / 3.141592654) / (NdotHSquared * NdotHSquared); | |
| } | |
| mad r0.x, v0.y, v0.y, l(-1.000000) | |
| mul r0.yz, v0.xxyx, v0.xxyx | |
| div r0.x, r0.x, r0.z | |
| div r0.y, l(1.000000, 1.000000, 1.000000, 1.000000), r0.y | |
| mul r0.xz, r0.yyzy, r0.xxzx | |
| mul r0.x, r0.x, l(1.442695) | |
| exp r0.x, r0.x | |
| mul r0.x, r0.y, r0.x | |
| mul r0.x, r0.x, l(0.318310) | |
| div o0.x, r0.x, r0.z | |
| float beckmann2(float m : M, float NdotH : NDOTH) : SV_Target0 | |
| { | |
| float oneOverMSquared = 1.0 / (m*m); | |
| float NdotHSquared = NdotH * NdotH; | |
| return exp((1.0 - 1.0 / NdotHSquared) * oneOverMSquared) * oneOverMSquared * (1.0 / 3.141592654) / (NdotHSquared * NdotHSquared); | |
| } | |
| mul r0.xy, v0.xyxx, v0.xyxx | |
| div r0.xz, l(1.000000, 1.000000, 1.000000, 1.000000), r0.xxyx | |
| add r0.z, -r0.z, l(1.000000) | |
| mul r0.yz, r0.yyxy, r0.yyzy | |
| mul r0.z, r0.z, l(1.442695) | |
| exp r0.z, r0.z | |
| mul r0.x, r0.x, r0.z | |
| mul r0.x, r0.x, l(0.318310) | |
| div o0.x, r0.x, r0.y |
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