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63 行
2.3 KiB

// Final compositing pass, just does gamma conversion for now.
Shader "Hidden/LightBoundsDebug"
{
Properties { }
SubShader {
Pass {
ZTest Always
Cull Off
ZWrite Off
Blend SrcAlpha One
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma target 5.0
#include "UnityCG.cginc"
#include "LightDefinitions.cs.hlsl"
StructuredBuffer<SFiniteLightBound> g_data : register(t0);
float4 vert(uint globalIndex : SV_VertexID) : SV_POSITION
{
uint lightIndex = globalIndex / 36;
uint localIndex = globalIndex - lightIndex * 36;
uint faceIndex = localIndex / 6;
uint vertexIndex = localIndex - faceIndex * 6;
int remapTrisToQuad[6] = { 0,1,2,2,3,0 }; // Remap tri indices to quad indices: 012345->012230
vertexIndex = remapTrisToQuad[vertexIndex];
uint faces[6][4] = {
{0, 2, 6, 4}, //-x
{1, 5, 7, 3}, //+x
{0, 4, 5, 1}, //-y
{2, 3, 7, 6}, //+y
{0, 1, 3, 2}, //-z
{4, 6, 7, 5}, //+z
};
SFiniteLightBound lightData = g_data[lightIndex];
uint coordIndex = faces[faceIndex][vertexIndex];
float3 coord = float3((coordIndex & 1) ? 1.0f : -1.0f, (coordIndex & 2) ? 1.0f : -1.0f, (coordIndex & 4) ? 1.0f : -1.0f);
coord.xy *= (coordIndex >= 4) ? lightData.scaleXY : float2(1, 1);
float3 viewPos = lightData.center + coord.x * lightData.boxAxisX.xyz + coord.y * lightData.boxAxisY.xyz + coord.z * -lightData.boxAxisZ.xyz;
#if USE_LEFTHAND_CAMERASPACE
// not completely sure why this is necessary since the old stuff pretends camera coordinate system is also left-hand.
// see: Camera::CalculateMatrixShaderProps()
viewPos.z = -viewPos.z;
#endif
return UnityViewToClipPos(viewPos);
}
fixed4 frag() : SV_Target
{
return float4(1.0f, 0.5f, 0.3f, 0.1f);
}
ENDCG
}
}
Fallback Off
}