65 lines
2.0 KiB
HLSL
65 lines
2.0 KiB
HLSL
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struct VertexData{
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float4 position:POSITION;
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float4 texcoord:TEXCOORD0;
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float4 normal:NORMAL;
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float4 tangent:TANGENT;
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};
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struct VSOut{
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float4 position:SV_POSITION;
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float4 normal:NORMAL;
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float4 texcoord:TEXCOORD0;
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float4 positionWS:TEXCOORD1;
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};
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static const float PI=3.141592;
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cbuffer globalConstants:register(b0){
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float4 misc;
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};
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cbuffer DefaultVertexCB:register(b1){
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float4x4 ProjectionMatrix;
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float4x4 ViewMatrix;
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float4x4 ModelMatrix;
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float4x4 IT_ModelMatrix;
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float4x4 ReservedMemory[1020];
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};
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VSOut MainVS(VertexData inVertexData){
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VSOut vo;
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vo.normal=mul(IT_ModelMatrix,inVertexData.normal);
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float3 positionMS=inVertexData.position.xyz+vo.normal*sin(misc.x);
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float4 positionWS=mul(ModelMatrix,float4(positionMS,1.0));
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float4 positionVS=mul(ViewMatrix,positionWS);
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vo.position=mul(ProjectionMatrix,positionVS);
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vo.positionWS=positionWS;
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vo.texcoord=inVertexData.texcoord;
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return vo;
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}
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float4 MainPS(VSOut inPSInput):SV_TARGET{
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float3 N=normalize(inPSInput.normal.xyz);
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float3 bottomColor=float3(0.1f,0.4f,0.6f);
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float3 topColor=float3(0.7f,0.7f,0.7f);
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float theta=asin(N.y);//-PI/2 ~ PI/2
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theta/=PI;//-0.5~0.5
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theta+=0.5f;//0.0~1.0
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float ambientColorIntensity=0.2;
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float3 ambientColor=lerp(bottomColor,topColor,theta)*ambientColorIntensity;
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float3 L=normalize(float3(1.0f,1.0f,-1.0f));
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float diffuseIntensity=max(0.0f,dot(N,L));
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float3 diffuseLightColor=float3(0.1f,0.4f,0.6f);
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float3 diffuseColor=diffuseLightColor*diffuseIntensity;
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float3 specularColor=float3(0.0f,0.0f,0.0f);
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if(diffuseIntensity>0.0f){
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float3 cameraPositionWS=float3(0.0f,0.0f,0.0f);
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float3 V=normalize(cameraPositionWS.xyz-inPSInput.positionWS.xyz);
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float3 R=normalize(reflect(-L,N));
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float specularIntensity=pow(max(0.0f,dot(V,R)),128.0f);
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specularColor=float3(1.0f,1.0f,1.0f)*specularIntensity;
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}
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float3 surfaceColor=ambientColor+diffuseColor+specularColor;
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return float4(surfaceColor,1.0f);
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}
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