42 lines
896 B
Plaintext
42 lines
896 B
Plaintext
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#include "common.h"
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cbuffer VolumetricLights
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{
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float3 vMinBounds;
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float3 vMaxBounds;
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float4 FrustumClipPlane[6];
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}
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struct v2p
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{
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float3 lightToPos : TEXCOORD0; // light center to plane vector
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float3 vPos : TEXCOORD1; // position in camera space
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float fDensity : TEXCOORD2; // plane density alon Z axis
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float3 clip0 : SV_ClipDistance0;
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float3 clip1 : SV_ClipDistance1;
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float4 hpos : SV_Position;
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};
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//float4x4 m_texgen;
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v2p main ( float3 P : POSITION )
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{
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v2p o;
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float4 vPos;
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vPos.xyz = lerp( vMinBounds, vMaxBounds, P); // Position in camera space
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vPos.w = 1.0;
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o.hpos = mul(m_P, vPos); // xform, input in camera coordinates
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o.lightToPos = vPos.xyz - Ldynamic_pos.xyz;
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o.vPos = vPos;
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o.fDensity = 1.0 / 40.0;
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for (int i=0; i<3; ++i)
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{
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o.clip0[i] = dot( o.hpos, FrustumClipPlane[i]);
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o.clip1[i] = dot( o.hpos, FrustumClipPlane[i+3]);
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}
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return o;
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}
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