您最多选择25个主题 主题必须以中文或者字母或数字开头,可以包含连字符 (-),并且长度不得超过35个字符
 
 
 
 

88 行
2.3 KiB

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