74 lines
2.4 KiB
HLSL
74 lines
2.4 KiB
HLSL
#ifndef ENKI_BILLAL_FULLSCREEN_INCLUDED
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#define ENKI_BILLAL_FULLSCREEN_INCLUDED
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#include "Assets/_Content/Shaders/Include/Noises.hlsl"
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareOpaqueTexture.hlsl"
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// Gaussian blur on scene color
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// blurRadius controls the spread in pixels — adjust to taste
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float3 SampleSceneColorBlurred(float2 uv, float blurRadius)
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{
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float3 result = 0;
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float totalWeight = 0;
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// Gaussian weights for 5 samples (sigma ~ 1.0)
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float weights[5] = { 0.0625, 0.25, 0.375, 0.25, 0.0625 };
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float offsets[5] = { -2, -1, 0, 1, 2 };
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float2 texelSize = blurRadius / _ScreenParams.xy;
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// Horizontal pass
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for (int i = 0; i < 5; i++)
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{
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float2 offsetUV = uv + float2(offsets[i] * texelSize.x, 0);
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result += SAMPLE_TEXTURE2D_X(_CameraOpaqueTexture, sampler_LinearClamp, offsetUV).rgb * weights[i];
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}
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return result;
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}
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void EnkiBillalFullscreen_float
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(
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float2 UV,
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out float3 Output
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)
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{
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float2 screenUV = UV;
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// DEPTH
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float rawDepth = SampleSceneDepth(screenUV);
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float depthMeters = LinearEyeDepth(rawDepth, _ZBufferParams); // linear eye-space depth in metres
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float depth01 = Linear01Depth(rawDepth, _ZBufferParams); // normalised linear depth [0..1]
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// POSITION WORLD SPACE
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// Remap depth for non-reversed-Z platforms before reconstruction
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float depthForReconstruct = rawDepth;
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#if !UNITY_REVERSED_Z
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depthForReconstruct = lerp(UNITY_NEAR_CLIP_VALUE, 1.0, rawDepth);
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#endif
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// ComputeWorldSpacePosition handles perspective divide and platform differences
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float3 positionWS = ComputeWorldSpacePosition(screenUV, depthForReconstruct, UNITY_MATRIX_I_VP);
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// NORMAL WORLD SPACE
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// Requires DepthNormals PrePass to be enabled in the URP Renderer
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float3 normalWS = SampleSceneNormals(screenUV);
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// SCENE COLOR
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float3 originColor = SampleSceneColor(screenUV);
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float greyscale = (originColor.x + originColor.y + originColor.z) / 3.0;
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float3 offsetUV = PerlinColor3D(positionWS * float3(1, 5, 1), 1) * smoothstep(smoothstep(20, 3, depthMeters), 1, greyscale) * .1 / depthMeters;
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float3 sceneColor = SampleSceneColor(screenUV + offsetUV);
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//float3 sceneColor = SAMPLE_TEXTURE2D_X(_CameraOpaqueTexture, sampler_PointClamp, screenUV).rgb;
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// OUTPUT
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Output = SampleSceneColorBlurred(screenUV, 10);
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}
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#endif |