78 lines
1.8 KiB
Plaintext
78 lines
1.8 KiB
Plaintext
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// Crest Ocean System
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// Copyright 2022 Wave Harmonic Ltd
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Shader "Hidden/Crest/SphereGradientBackground"
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{
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Properties
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{
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_ColorTowardsSun("_ColorTowardsSun", Color) = (1, 1, 1)
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_ColorAwayFromSun("_ColorAwayFromSun", Color) = (1, 1, 1)
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_Exponent("_Exponent", Float) = 1.0
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}
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SubShader
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{
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Tags { "RenderType"="Opaque" "LightMode"="UniversalForward" }
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LOD 100
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Pass
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{
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Cull Front
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Blend Off
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HLSLPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
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struct Attributes
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{
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float3 vertex : POSITION;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct Varyings
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{
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float4 vertex : SV_POSITION;
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float3 positionWS : TEXCOORD0;
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UNITY_VERTEX_OUTPUT_STEREO
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};
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Varyings vert (Attributes v)
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{
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Varyings o;
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ZERO_INITIALIZE(Varyings, o);
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.vertex = TransformObjectToHClip(v.vertex);
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o.positionWS = TransformObjectToWorld(v.vertex);
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return o;
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}
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float3 _ColorTowardsSun;
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float3 _ColorAwayFromSun;
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float _Exponent;
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float4 frag (Varyings i) : SV_Target
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{
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float3 worldPosition = i.positionWS;
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float3 viewDirection = normalize(i.positionWS - _WorldSpaceCameraPos);
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Light light = GetMainLight();
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const real3 lightDir = light.direction;
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const real3 lightCol = light.color * light.distanceAttenuation;
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float alpha = saturate(0.5 * dot(viewDirection, lightDir) + 0.5);
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alpha = pow(alpha, _Exponent);
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float3 col = lerp(_ColorAwayFromSun, _ColorTowardsSun, alpha);
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return float4(col * saturate(max(lightCol.r, max(lightCol.g, lightCol.b))), 1.0);
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}
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ENDHLSL
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}
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}
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}
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