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// Shader from NVidia example documentation:
// ftp://download.nvidia.com/developer/SDK/Individual_Samples/
// MEDIA/docPix/docs/FX_Shadowing.pdf
texture CTex : RENDERCOLORTARGET <
float2 Dimensions = {256,256};
string Format = "x8b8g8r8" ;
string UIWidget = "None";
>;
sampler CSamp = sampler_state {
texture = <CTex>;
AddressU = CLAMP; AddressV = CLAMP;
MipFilter = NONE;
MinFilter = LINEAR;
MagFilter = LINEAR;
};
texture DTex : RENDERDEPTHSTENCILTARGET <
float2 Dimensions = {256,256};
string format = "D24S8_SHADOWMAP";
string UIWidget = "None";
>;
sampler DSamp = sampler_state {
texture = <DTex>;
AddressU = CLAMP; AddressV = CLAMP;
MipFilter = NONE;
MinFilter = LINEAR;
MagFilter = LINEAR;
};
float Script : STANDARDSGLOBAL <
string UIWidget = "none";
string ScriptClass = "sceneorobject";
string ScriptOrder = "standard";
string ScriptOutput = "color";
string Script = "Tech=Technique?Shadowed:Unshadowed;";
> = 0.8; // version #
// The following global variables are values to be used
// when clearing color and/or depth buffers
float4 ClearColor <
string UIWidget = "color";
string UIName = "background";
> = {0,0,0,0.0};
float ClearDepth <
string UIWidget = "none";
> = 1.0;
float4 ShadowClearColor <
string UIWidget = "none";
> = {1,1,1,0.0};
void lightingCalc(ShadowingVertexOutput IN,
out float3 litContrib,
out float3 ambiContrib) {
float3 Nn = normalize(IN.WNormal);
float3 Vn = normalize(IN.WView);
Nn = faceforward(Nn,-Vn,Nn);
float falloff = 1.0 / dot(IN.LightVec,IN.LightVec);
float3 Ln = normalize(IN.LightVec);
float3 Hn = normalize(Vn + Ln);
float hdn = dot(Hn,Nn);
float ldn = dot(Ln,Nn);
float4 litVec = lit(ldn,hdn,SpecExpon);
ldn = litVec.y * SpotLightIntensity;
ambiContrib = SurfColor * AmbiLightColor;
float3 diffContrib = SurfColor*(Kd * ldn * SpotLightColor);
float3 specContrib = ((ldn * litVec.z * Ks) * SpotLightColor);
float3 result = diffContrib + specContrib;
float cone = tex2Dproj(SpotSamp,IN.LProj);
litContrib = ((cone*falloff) * result);
}
float4 useShadowPS(ShadowingVertexOutput IN) : COLOR {
float3 litPart, ambiPart;
lightingCalc(IN,litPart,ambiPart);
float4 shadowed = tex2Dproj(ShadDepthSampler,IN.LProj);
return float4((shadowed.x*litPart)+ambiPart,1);
}
float4 unshadowedPS(ShadowingVertexOutput IN) : COLOR {
float3 litPart, ambiPart;
lightingCalc(IN,litPart,ambiPart);
}
technique Unshadowed <
string Script = "Pass=NoShadow;";
> {
pass NoShadow <
string Script =
"RenderColorTarget0=;"
"RenderDepthStencilTarget=;"
"RenderPort=;"
"ClearSetColor=ClearColor;"
"ClearSetDepth=ClearDepth;"
"ClearDepth=Color;"
"Clear=Depth;"
"Draw=geometry;";
> {
VertexShader = compile vs_2_0
shadowUseVS(WorldXf,
WorldITXf,
WorldViewProjXf,
ShadowViewProjXf,
ViewIXf,
ShadBiasXf,
SpotLightPos);
ZEnable = true;
ZWriteEnable = true;
ZFunc = LessEqual;
CullMode = None;
PixelShader = compile ps_2_a unshadowedPS();
}
}
technique Shadowed <
string Script = "Pass=MakeShadow;"
"Pass=UseShadow;";
> {
pass MakeShadow <
string Script =
"RenderColorTarget0=ColorShadMap;"
"RenderDepthStencilTarget=ShadDepthTarget;"
"RenderPort=light0;"
"ClearSetColor=ShadowClearColor;"
"ClearSetDepth=ClearDepth;"
"Clear=Color;"
"Clear=Depth;"
"Draw=geometry;";
> {
VertexShader = compile vs_2_0
shadowGenVS(WorldXf,
WorldITXf,
ShadowViewProjXf);
ZEnable = true;
ZWriteEnable = true;
ZFunc = LessEqual;
CullMode = None;
// no pixel shader needed!
}
pass UseShadow <
string Script =
"RenderColorTarget0=;"
"RenderDepthStencilTarget=;"
" RenderPort=;"
"ClearSetColor=ClearColor;"
"ClearSetDepth=ClearDepth;"
"Clear=Color;"
"Clear=Depth;"
"Draw=geometry;";
> {
VertexShader = compile vs_2_0
shadowUseVS(WorldXf,
WorldITXf,
WorldViewProjXf,
ShadowViewProjXf,
ViewIXf,
ShadBiasXf,
SpotLightPos);
ZEnable = true;
ZWriteEnable = true;
ZFunc = LessEqual;
CullMode = None;
PixelShader = compile ps_2_a useShadowPS();
}
}
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