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33 lines
708 B
HLSL
33 lines
708 B
HLSL
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#include "Common.hlsli"
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cbuffer VSSceneVars : register(b0)
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{
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float4x4 ViewProj;
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float4x4 ViewInv;
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float SegmentCount;
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float VertexCount;
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float Pad1;
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float Pad2;
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}
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cbuffer VSSphereVars : register(b1)
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{
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float3 Center;
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float Radius;
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}
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float4 main(uint id : SV_VertexID) : SV_POSITION
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{
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static const float twopi = 6.283185307179586476925286766559;
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uint seg = id;
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float t = twopi*((float)seg)/SegmentCount;
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float ct = cos(t);
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float st = sin(t);
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float r = Radius;
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float3 o = float3(ct*r, st*r, 0);
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float3 f = Center.xyz + mul(o, (float3x3)ViewInv);
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float4 cpos = mul(float4(f,1), ViewProj);
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cpos.z = DepthFunc(cpos.zw);
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return cpos;
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}
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