40c951e02b
added a shader folder for the stock shaders started the StockShaderCodeGenerator tool added a tools solution file added a bin folder in tools folder for precompiled tools and changed tools project files removed StockEffects content project from solution and added the effect files to the shader folder for reference
95 lines
2.8 KiB
HLSL
95 lines
2.8 KiB
HLSL
//-----------------------------------------------------------------------------
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// Lighting.fxh
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//
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// Microsoft XNA Community Game Platform
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// Copyright (C) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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struct ColorPair
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{
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float3 Diffuse;
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float3 Specular;
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};
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ColorPair ComputeLights(float3 eyeVector, float3 worldNormal, uniform int numLights)
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{
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float3x3 lightDirections = 0;
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float3x3 lightDiffuse = 0;
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float3x3 lightSpecular = 0;
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float3x3 halfVectors = 0;
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[unroll]
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for (int i = 0; i < numLights; i++)
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{
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lightDirections[i] = float3x3(DirLight0Direction, DirLight1Direction, DirLight2Direction) [i];
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lightDiffuse[i] = float3x3(DirLight0DiffuseColor, DirLight1DiffuseColor, DirLight2DiffuseColor) [i];
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lightSpecular[i] = float3x3(DirLight0SpecularColor, DirLight1SpecularColor, DirLight2SpecularColor)[i];
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halfVectors[i] = normalize(eyeVector - lightDirections[i]);
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}
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float3 dotL = mul(-lightDirections, worldNormal);
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float3 dotH = mul(halfVectors, worldNormal);
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float3 zeroL = step(0, dotL);
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float3 diffuse = zeroL * dotL;
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float3 specular = pow(max(dotH, 0) * zeroL, SpecularPower);
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ColorPair result;
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result.Diffuse = mul(diffuse, lightDiffuse) * DiffuseColor.rgb + EmissiveColor;
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result.Specular = mul(specular, lightSpecular) * SpecularColor;
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return result;
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}
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CommonVSOutput ComputeCommonVSOutputWithLighting(float4 position, float3 normal, uniform int numLights)
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{
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CommonVSOutput vout;
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float4 pos_ws = mul(position, World);
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float3 eyeVector = normalize(EyePosition - pos_ws.xyz);
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float3 worldNormal = normalize(mul(normal, WorldInverseTranspose));
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ColorPair lightResult = ComputeLights(eyeVector, worldNormal, numLights);
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vout.Pos_ps = mul(position, WorldViewProj);
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vout.Diffuse = float4(lightResult.Diffuse, DiffuseColor.a);
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vout.Specular = lightResult.Specular;
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vout.FogFactor = ComputeFogFactor(position);
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return vout;
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}
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struct CommonVSOutputPixelLighting
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{
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float4 Pos_ps;
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float3 Pos_ws;
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float3 Normal_ws;
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float FogFactor;
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};
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CommonVSOutputPixelLighting ComputeCommonVSOutputPixelLighting(float4 position, float3 normal)
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{
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CommonVSOutputPixelLighting vout;
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vout.Pos_ps = mul(position, WorldViewProj);
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vout.Pos_ws = mul(position, World).xyz;
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vout.Normal_ws = normalize(mul(normal, WorldInverseTranspose));
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vout.FogFactor = ComputeFogFactor(position);
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return vout;
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}
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#define SetCommonVSOutputParamsPixelLighting \
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vout.PositionPS = cout.Pos_ps; \
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vout.PositionWS = float4(cout.Pos_ws, cout.FogFactor); \
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vout.NormalWS = cout.Normal_ws;
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