102 lines
2.8 KiB
Text
102 lines
2.8 KiB
Text
Shader "Normal/Examples/Gradient Skybox" {
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Properties {
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[Header(Gradient Colors)]
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_ColorT ("Top Color", Color) = (1,1,1,1)
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_ColorM ("Middle Color", Color) = (1,1,1,1)
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_ColorB ("Bottom Color", Color) = (1,1,1,1)
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[Header(Gradient Settings)]
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_ExponentT ("Upper Exponent", Float) = 1.0
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_ExponentB ("Lower Exponent", Float) = 1.0
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_Intensity ("Intensity", Float) = 1.0
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[Header(Sun Settings)]
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[Toggle(SUN)] _Sun ("Show Sun", Float) = 0
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[HideIfDisabled(SUN)] _SunColor("Sun Color", Color) = (1, 1, 1, 1)
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[HideIfDisabled(SUN)] _SunSize("Sun Size", Range(0,1)) = 0.3
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[HideIfDisabled(SUN)] _SunAzimuth("Sun Azimuth", Range(0,360)) = 60
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[HideIfDisabled(SUN)] _SunAltitude("Sun Altitude", Range(-90,90)) = 30
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[HideIfDisabled(SUN)] _SunIntensity("Sun Intensity", Float) = 2.0
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[HideInInspector] _SunVector("Sun Vector", Vector) = (1,0,0,0)
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[Header(Additional Settings)]
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[Toggle(DITHER)] _Dither ("Add Screenspace Dither", Float) = 0
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}
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SubShader {
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Tags { "RenderType"="Background" "Queue"="Background" "DisableBatching"="True" "IgnoreProjector"="True" "PreviewType"="Skybox" }
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Fog { Mode Off }
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ZWrite Off
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Cull Back
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Pass {
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma shader_feature SUN
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#pragma shader_feature DITHER
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#pragma fragmentoption ARB_precision_hint_fastest
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#include "UnityCG.cginc"
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fixed3 _ColorT;
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fixed3 _ColorM;
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fixed3 _ColorB;
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half _ExponentT;
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half _ExponentB;
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half _Intensity;
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#ifdef SUN
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fixed3 _SunColor;
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half _SunSize;
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half _SunIntensity;
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half3 _SunVector;
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#endif
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#ifdef DITHER
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float3 ScreenSpaceDither(float2 screenpos)
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{
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float3 dither = dot(float2(171.0, 231.0), screenpos + _Time.yy).xxx;
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dither.rgb = frac(dither / float3(103.0, 71.0, 97.0)) - float3(0.5, 0.5, 0.5);
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return (dither / 255.0);
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}
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#endif
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struct appdata {
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float4 vertex : POSITION;
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float3 texcoord : TEXCOORD0;
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};
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struct Varyings {
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float4 vertex : SV_POSITION;
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float3 texcoord : TEXCOORD0;
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};
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Varyings vert(appdata v) {
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Varyings o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.texcoord = v.texcoord;
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return o;
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}
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fixed4 frag (Varyings i) : SV_Target {
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float3 n = normalize(i.texcoord);
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float factorT = 1.0 - pow(min(1.0, 1.0 - n.y), _ExponentT);
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float factorB = 1.0 - pow(min(1.0, 1.0 + n.y), _ExponentB);
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float factorM = 1.0 - factorT - factorB;
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fixed3 color = (_ColorT * factorT + _ColorM * factorM + _ColorB * factorB) * _Intensity;
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#if SUN
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color += min(pow(max(0, dot(n, _SunVector)), pow(50000.0, 1.0 - _SunSize)), 1) * _SunColor * _SunIntensity;
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#endif
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#if DITHER
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color += ScreenSpaceDither(i.vertex.xy);
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#endif
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return fixed4(color, 1);
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}
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ENDCG
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}
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}
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}
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