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88 行
2.3 KiB
88 行
2.3 KiB
#ifndef __LIGHTINGUTILS_H__
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#define __LIGHTINGUTILS_H__
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#include "..\common\ShaderBase.h"
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#include "LightDefinitions.cs.hlsl"
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uniform float4x4 g_mViewToWorld;
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uniform float4x4 g_mWorldToView; // used for reflection only
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uniform float4x4 g_mScrProjection;
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uniform float4x4 g_mInvScrProjection;
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uniform uint g_widthRT;
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uniform uint g_heightRT;
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float3 GetViewPosFromLinDepth(float2 v2ScrPos, float fLinDepth)
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{
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float fSx = g_mScrProjection[0].x;
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//float fCx = g_mScrProjection[2].x;
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float fCx = g_mScrProjection[0].z;
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float fSy = g_mScrProjection[1].y;
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//float fCy = g_mScrProjection[2].y;
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float fCy = g_mScrProjection[1].z;
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#ifdef LEFT_HAND_COORDINATES
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return fLinDepth*float3( ((v2ScrPos.x-fCx)/fSx), ((v2ScrPos.y-fCy)/fSy), 1.0 );
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#else
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return fLinDepth*float3( -((v2ScrPos.x+fCx)/fSx), -((v2ScrPos.y+fCy)/fSy), 1.0 );
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#endif
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}
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float GetLinearZFromSVPosW(float posW)
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{
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#ifdef LEFT_HAND_COORDINATES
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float linZ = posW;
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#else
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float linZ = -posW;
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#endif
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return linZ;
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}
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float GetLinearDepth(float zDptBufSpace) // 0 is near 1 is far
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{
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float3 vP = float3(0.0f,0.0f,zDptBufSpace);
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float4 v4Pres = mul(g_mInvScrProjection, float4(vP,1.0));
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return v4Pres.z / v4Pres.w;
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}
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float3 OverlayHeatMap(uint numLights, float3 c)
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{
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/////////////////////////////////////////////////////////////////////
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//
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const float4 kRadarColors[12] =
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{
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float4(0.0,0.0,0.0,0.0), // black
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float4(0.0,0.0,0.6,0.5), // dark blue
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float4(0.0,0.0,0.9,0.5), // blue
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float4(0.0,0.6,0.9,0.5), // light blue
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float4(0.0,0.9,0.9,0.5), // cyan
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float4(0.0,0.9,0.6,0.5), // blueish green
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float4(0.0,0.9,0.0,0.5), // green
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float4(0.6,0.9,0.0,0.5), // yellowish green
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float4(0.9,0.9,0.0,0.5), // yellow
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float4(0.9,0.6,0.0,0.5), // orange
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float4(0.9,0.0,0.0,0.5), // red
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float4(1.0,0.0,0.0,0.9) // strong red
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};
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float maxNrLightsPerTile = 31;
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int nColorIndex = numLights==0 ? 0 : (1 + (int) floor(10 * (log2((float)numLights) / log2(maxNrLightsPerTile))) );
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nColorIndex = nColorIndex<0 ? 0 : nColorIndex;
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float4 col = nColorIndex>11 ? float4(1.0,1.0,1.0,1.0) : kRadarColors[nColorIndex];
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return lerp(c, pow(col.xyz, 2.2), 0.3*col.w);
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}
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#endif
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