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69 lines
1.6 KiB
HLSL
69 lines
1.6 KiB
HLSL
#include "Common.hlsli"
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struct VS_Output
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{
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float4 Pos : SV_POSITION;
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float4 Screen : TEXCOORD0;
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};
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cbuffer VSLightVars : register(b0)
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{
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float4x4 ViewProj;
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float4 CameraPos;
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uint LightType; //0=directional, 1=Point, 2=Spot, 4=Capsule
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uint IsLOD; //useful or not?
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uint Pad0;
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uint Pad1;
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}
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cbuffer VSLightInstVars : register(b1)
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{
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float3 InstPosition;//camera relative
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float InstIntensity;
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float3 InstColour;
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float InstFalloff;
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float3 InstDirection;
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float InstFalloffExponent;
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float3 InstTangentX;
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float InstConeInnerAngle;
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float3 InstTangentY;
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float InstConeOuterAngle;
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float3 InstCapsuleExtent;
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uint InstType;
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float3 InstCullingPlaneNormal;
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float InstCullingPlaneOffset;
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}
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VS_Output main(float4 ipos : POSITION, uint iid : SV_InstanceID)
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{
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float3 opos = 0;
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float extent = InstFalloff;
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if (InstType == 1)//point (sphere)
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{
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opos = ipos.xyz * extent;
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}
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else if (InstType == 2)//spot (cone)
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{
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float arads = InstConeOuterAngle;
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float3 cpos = ipos.xyz * (tan(arads) * extent);
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cpos.y += ipos.w * extent;
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opos = (cpos.x * InstTangentX) + (cpos.y * InstDirection) + (cpos.z * InstTangentY);
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}
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else if (InstType == 4)//capsule
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{
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float3 cpos = ipos.xyz * extent;
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cpos += InstCapsuleExtent * (ipos.w * 2 - 1) * 0.1;
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opos = (cpos.x * InstTangentX.xyz) + (cpos.y * InstDirection.xyz) + (cpos.z * InstTangentY.xyz);
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}
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float4 spos = mul(float4(opos + InstPosition, 1), ViewProj);
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VS_Output output;
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output.Pos = spos;
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output.Screen = spos;
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return output;
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}
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