102 lines
3.0 KiB
GLSL
102 lines
3.0 KiB
GLSL
Shader "FullScreen/Ether"
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{
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Properties
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{
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_SpectrumTexture("SpectrumTexture", 2D) = "white" {}
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_ThemeTexture("ThemeTexture", 2D) = "white" {}
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_SpectrumSize("SpectrumSize", float) = 16
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}
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HLSLINCLUDE
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// HDRP stuff
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#pragma vertex Vert
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#pragma target 4.5
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#pragma only_renderers d3d11 playstation xboxone xboxseries vulkan metal switch
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#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/RenderPass/CustomPass/CustomPassCommon.hlsl"
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// here we go...
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sampler2D _SpectrumTexture;
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sampler2D _ThemeTexture;
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// matrix fn
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float2x2 m(float a) {
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float c=cos(a), s=sin(a);
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float2x2 mat = { c, -s, s, c };
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return mat;
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}
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float map(float3 p, float4 spectrum) {
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float t = _Time.y * 0.5;
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float magic = spectrum.y * 0.05;
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float zing = spectrum.x * 0.05;
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float zip = spectrum.z * 0.05;
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float wow = 4.5; //lerp(4.0, 5.0, spectrum.w);
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p.xz = mul(m(zing + t), p.xz);
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p.xy = mul(m(magic + t), p.xy);
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float3 q = p*wow + t;
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return length(p +
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// float3(sin(t - magic), sin(t + magic), sin(t - magic)))
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float3(magic, zing, zip))
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*log(length(p)+zip) + sin(q.x+sin(q.z+sin(q.y)))*0.5;
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}
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float4 FullScreenPass(Varyings varyings) : SV_Target {
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float depth = LoadCameraDepth(varyings.positionCS.xy);
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PositionInputs posInput = GetPositionInput(varyings.positionCS.xy, _ScreenSize.zw, depth, UNITY_MATRIX_I_VP, UNITY_MATRIX_V);
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// musique
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float sub = tex2D(_SpectrumTexture, 0.0);
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float bass = tex2D(_SpectrumTexture, 0.25);
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float mids = tex2D(_SpectrumTexture, 0.50);
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float highs = tex2D(_SpectrumTexture, 0.75);
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float4 spectrum = float4(sub, bass, mids, highs);
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// screen
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float2 p = posInput.positionNDC - .5;
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p.x *= _ScreenParams.x / _ScreenParams.y;
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float t = _Time.y;
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float3 colour = float3(0.0, 0.0, 0.0);
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float d = smoothstep(1.5, 3.5, sub);
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float iterations = 10.0;
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// float iterations = lerp(10.0, 50.0, highs);
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float str = 4.5; // lerp(4.9, 5.0, highs);
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float size = 1.0; //lerp(0.5, 2.0, mids);
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for(int i=0; i<=iterations; i++) {
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float3 n = float3(0.,0.,str) + normalize(float3(p, -size))*d;
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float rz = map(n, spectrum);
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float f = clamp((rz - map(n+.1, spectrum))*0.5, -.1, 1.);
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float3 l = float3(0.1,0.3,.4) + float3(5., 2.5, 3.)*f;
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colour = colour*l + smoothstep(2.5, .0, rz)*.7*l;
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d += min(rz, 1.);
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}
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return float4(colour, 1.);
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}
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ENDHLSL
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SubShader
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{
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Tags{ "RenderPipeline" = "HDRenderPipeline" }
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Pass
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{
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Name "Custom Pass 0"
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ZWrite Off
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ZTest Always
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// Blend SrcAlpha OneMinusSrcAlpha
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Cull Off
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HLSLPROGRAM
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#pragma fragment FullScreenPass
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ENDHLSL
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}
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}
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Fallback Off
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}
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