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
115 行
3.8 KiB
115 行
3.8 KiB
#ifndef LIGHTWEIGHT_PIPELINE_CORE_INCLUDED
|
|
#define LIGHTWEIGHT_PIPELINE_CORE_INCLUDED
|
|
|
|
#include "CoreRP/ShaderLibrary/Common.hlsl"
|
|
#include "CoreRP/ShaderLibrary/Packing.hlsl"
|
|
#include "Input.hlsl"
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
#ifdef _NORMALMAP
|
|
#define OUTPUT_NORMAL(IN, OUT) OutputTangentToWorld(IN.tangent, IN.normal, OUT.tangent, OUT.binormal, OUT.normal)
|
|
#else
|
|
#define OUTPUT_NORMAL(IN, OUT) OUT.normal = TransformObjectToWorldNormal(IN.normal)
|
|
#endif
|
|
|
|
#if defined(UNITY_REVERSED_Z)
|
|
#if UNITY_REVERSED_Z == 1
|
|
//D3d with reversed Z => z clip range is [near, 0] -> remapping to [0, far]
|
|
//max is required to protect ourselves from near plane not being correct/meaningfull in case of oblique matrices.
|
|
#define UNITY_Z_0_FAR_FROM_CLIPSPACE(coord) max(((1.0-(coord)/_ProjectionParams.y)*_ProjectionParams.z),0)
|
|
#else
|
|
//GL with reversed z => z clip range is [near, -far] -> should remap in theory but dont do it in practice to save some perf (range is close enough)
|
|
#define UNITY_Z_0_FAR_FROM_CLIPSPACE(coord) max(-(coord), 0)
|
|
#endif
|
|
#elif UNITY_UV_STARTS_AT_TOP
|
|
//D3d without reversed z => z clip range is [0, far] -> nothing to do
|
|
#define UNITY_Z_0_FAR_FROM_CLIPSPACE(coord) (coord)
|
|
#else
|
|
//Opengl => z clip range is [-near, far] -> should remap in theory but dont do it in practice to save some perf (range is close enough)
|
|
#define UNITY_Z_0_FAR_FROM_CLIPSPACE(coord) (coord)
|
|
#endif
|
|
|
|
void AlphaDiscard(half alpha, half cutoff)
|
|
{
|
|
#ifdef _ALPHATEST_ON
|
|
clip(alpha - cutoff);
|
|
#endif
|
|
}
|
|
|
|
half3 UnpackNormal(half4 packedNormal)
|
|
{
|
|
// Compiler will optimize the scale away
|
|
#if defined(UNITY_NO_DXT5nm)
|
|
return UnpackNormalRGB(packedNormal, 1.0);
|
|
#else
|
|
return UnpackNormalmapRGorAG(packedNormal, 1.0);
|
|
#endif
|
|
}
|
|
|
|
half3 UnpackNormalScale(half4 packedNormal, half bumpScale)
|
|
{
|
|
#if defined(UNITY_NO_DXT5nm)
|
|
return UnpackNormalRGB(packedNormal, bumpScale);
|
|
#else
|
|
return UnpackNormalmapRGorAG(packedNormal, bumpScale);
|
|
#endif
|
|
}
|
|
|
|
void OutputTangentToWorld(half4 vertexTangent, half3 vertexNormal, out half3 tangentWS, out half3 binormalWS, out half3 normalWS)
|
|
{
|
|
half sign = vertexTangent.w * GetOddNegativeScale();
|
|
normalWS = TransformObjectToWorldNormal(vertexNormal);
|
|
tangentWS = normalize(mul((half3x3)UNITY_MATRIX_M, vertexTangent.xyz));
|
|
binormalWS = cross(normalWS, tangentWS) * sign;
|
|
}
|
|
|
|
half3 TangentToWorldNormal(half3 normalTangent, half3 tangent, half3 binormal, half3 normal)
|
|
{
|
|
half3x3 tangentToWorld = half3x3(tangent, binormal, normal);
|
|
return normalize(mul(normalTangent, tangentToWorld));
|
|
}
|
|
|
|
// TODO: A similar function should be already available in SRP lib on master. Use that instead
|
|
float4 ComputeScreenPos(float4 positionCS)
|
|
{
|
|
float4 o = positionCS * 0.5f;
|
|
o.xy = float2(o.x, o.y * _ProjectionParams.x) + o.w;
|
|
o.zw = positionCS.zw;
|
|
return o;
|
|
}
|
|
|
|
half ComputeFogFactor(float z)
|
|
{
|
|
float clipZ_01 = UNITY_Z_0_FAR_FROM_CLIPSPACE(z);
|
|
|
|
#if defined(FOG_LINEAR)
|
|
// factor = (end-z)/(end-start) = z * (-1/(end-start)) + (end/(end-start))
|
|
float fogFactor = saturate(clipZ_01 * unity_FogParams.z + unity_FogParams.w);
|
|
return half(fogFactor);
|
|
#elif defined(FOG_EXP2)
|
|
// factor = exp(-(density*z)^2)
|
|
// -density * z computed at vertex
|
|
return half(unity_FogParams.x * clipZ_01);
|
|
#else
|
|
return 0.0h;
|
|
#endif
|
|
}
|
|
|
|
void ApplyFogColor(inout half3 color, half3 fogColor, half fogFactor)
|
|
{
|
|
#if defined (FOG_LINEAR) || defined(FOG_EXP2)
|
|
#if defined(FOG_EXP2)
|
|
// factor = exp(-(density*z)^2)
|
|
// fogFactor = density*z compute at vertex
|
|
fogFactor = saturate(exp2(-fogFactor*fogFactor));
|
|
#endif
|
|
color = lerp(fogColor, color, fogFactor);
|
|
#endif
|
|
}
|
|
|
|
void ApplyFog(inout half3 color, half fogFactor)
|
|
{
|
|
ApplyFogColor(color, unity_FogColor.rgb, fogFactor);
|
|
}
|
|
|
|
#endif
|