146 lines
4.0 KiB
HLSL
146 lines
4.0 KiB
HLSL
#ifndef UTS_COMMON
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#define UTS_COMMON
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#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl"
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#define inverselerp(a, b, x) saturate(((x) - (a)) / ((b) - (a)))
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float2 GetWHRatio()
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{
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return float2(_ScreenParams.y / _ScreenParams.x, 1);
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}
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float StepAntiAliasing(float x, float y)
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{
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float v = x - y;
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return saturate(v / fwidth(v));//fwidth(x) = abs(ddx(x) + ddy(x))
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}
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#define SampleRampSignalLine(texture, u) (SAMPLE_TEXTURE2D_LOD(texture, s_linear_clamp_sampler, float2(u, 0.5), 0))
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// ----------------------------------------------------------------------------
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// Transform
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// ----------------------------------------------------------------------------
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float3 ProjectOnPlane(float3 vec, float3 normal)
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{
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return vec - normal * dot(vec, normal);
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}
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float2 Rotate_UV(float2 _uv, float _radian, float2 _piv, float _time)
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{
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float RotateUV_ang = _radian;
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float RotateUV_cos = cos(_time * RotateUV_ang);
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float RotateUV_sin = sin(_time * RotateUV_ang);
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return(mul(_uv - _piv, float2x2(RotateUV_cos, -RotateUV_sin, RotateUV_sin, RotateUV_cos)) + _piv);
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}
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// Anti-perspective form Colin: Counteract perspective effects by replacing regular depth with uniform depth
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uniform float _AntiPerspectiveIntensity;
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void AntiPerspective(inout float4 clipPos)
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{
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float centerVSz = mul(UNITY_MATRIX_V, float4(UNITY_MATRIX_M._m03_m13_m23, 1.0)).z;
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clipPos.xy *= lerp(1.0, abs(clipPos.w) / - centerVSz, _AntiPerspectiveIntensity);
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}
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// ASE
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float2 UnStereo(float2 UV)
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{
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#if UNITY_SINGLE_PASS_STEREO
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float4 scaleOffset = unity_StereoScaleOffset[ unity_StereoEyeIndex ];
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UV.xy = (UV.xy - scaleOffset.zw) / scaleOffset.xy;
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#endif
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return UV;
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}
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// ----------------------------------------------------------------------------
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// Color
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// ----------------------------------------------------------------------------
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float3 ShiftColorPurity(float3 color, float purity)
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{
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return lerp(Luminance(color), color, purity);
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}
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void AlphaGammaCorrection(inout float a1, inout float a2, inout float a3, inout float a4)
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{
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float4 a = float4(a1, a2, a3, a4);
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a = pow(abs(a), 1 / 1.48);
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a1 = a.x;
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a2 = a.y;
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a3 = a.z;
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a4 = a.w;
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}
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void AlphaGammaCorrection(inout float alpha)
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{
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alpha = pow(abs(alpha), 1 / 1.48);
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}
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void AlphaGammaCorrection(inout float alpha, inout float alpha2)
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{
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AlphaGammaCorrection(alpha, alpha2, alpha, alpha);
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}
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void AlphaGammaCorrection(inout float alpha, inout float alpha2, inout float alpha3)
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{
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AlphaGammaCorrection(alpha, alpha2, alpha3, alpha3);
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}
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// ----------------------------------------------------------------------------
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// Depth
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// ----------------------------------------------------------------------------
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float LinearEyeDepth(float z)
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{
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return LinearEyeDepth(z, _ZBufferParams);
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}
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// https://forum.unity.com/threads/what-does-unity-exactly-do-when-we-modify-z-buffer-value-using-sv_depth.526406/
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float LinearEyeDepthToOutDepth(float z)
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{
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return(1 - _ZBufferParams.w * z) / (_ZBufferParams.z * z);
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}
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// Returns the forward (Right) direction of the current view in the world space.
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float3 GetViewRightDir()
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{
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float4x4 viewMat = GetWorldToViewMatrix();
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return viewMat[0].xyz;
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}
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// ASE
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float3 InvertDepthDirHD(float3 In)
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{
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float3 result = In;
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#if !defined(ASE_SRP_VERSION) || ASE_SRP_VERSION <= 70301 || ASE_SRP_VERSION == 70503 || ASE_SRP_VERSION >= 80301
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result *= float3(1, 1, -1);
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#endif
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return result;
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}
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float4x4 unity_CameraProjection;
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float4x4 unity_CameraInvProjection;
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float4x4 unity_WorldToCamera;
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float4x4 unity_CameraToWorld;
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// ASE
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float3 GetWorldPosFromDepthBuffer(float2 clipPos01, float cameraDepth)
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{
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#ifdef UNITY_REVERSED_Z
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float depth = (1.0 - cameraDepth);
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#else
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float depth = cameraDepth;
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#endif
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float3 screenPos_DepthBuffer = (float3(clipPos01, depth));
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float4 clipPos = (float4((screenPos_DepthBuffer * 2.0 - 1.0), 1.0));
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float4 viewPos = mul(unity_CameraInvProjection, clipPos);
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float3 viewPosNorm = viewPos.xyz / viewPos.w;
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float3 localInvertDepthDirHD = InvertDepthDirHD(viewPosNorm);
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return mul(unity_CameraToWorld, float4(localInvertDepthDirHD, 1.0)).xyz;
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}
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#endif |