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110 lines
3.0 KiB
Plaintext
110 lines
3.0 KiB
Plaintext
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
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Shader "Enviro/Lite/MoonShaderPhased"
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{
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Properties
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{
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_MainTex ("Moon Texture", 2D) = "white" {}
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_Phase ("Moon Phase", float) = 0
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_Brightness ("Moon Brightness", Range(0.1,5)) = 0.5
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}
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SubShader
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{
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Tags
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{"Queue"="Transparent"
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"RenderType"="Transparent"
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"IgnoreProjector"="True"
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}
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Fog
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{
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Mode Off
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}
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Pass
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{
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Cull Back
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Blend SrcAlpha OneMinusSrcAlpha
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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#pragma target 2.0
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uniform sampler2D _MainTex;
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uniform float4 _MainTex_ST;
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uniform float _Phase;
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uniform float _Brightness;
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uniform float _moonFogIntensity;
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struct v2f {
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float4 position : POSITION;
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fixed4 color : COLOR;
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float2 uv_MainTex : TEXCOORD0;
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float3 normal : TEXCOORD1;
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float3 viewdir : TEXCOORD2;
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};
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float MoonPhaseFactor(float2 uv, float phase)
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{
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float alpha = 1.0;
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float srefx = uv.x - 0.5;
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float refx = abs(uv.x - 0.5);
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float refy = abs(uv.y - 0.5);
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float refxfory = sqrt(0.25 - refy * refy);
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float xmin = -refxfory;
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float xmax = refxfory;
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float xmin1 = (xmax - xmin) * (phase / 2) + xmin;
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float xmin2 = (xmax - xmin) * phase + xmin;
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if (srefx < xmin1) {
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alpha = 0;
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} else if (srefx < xmin2 && xmin1 != xmin2) {
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alpha = (srefx - xmin1) / (xmin2 - xmin1);
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}
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return alpha;
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}
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v2f vert(appdata_base v) {
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v2f o;
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float phaseabs = abs(_Phase);
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float3 offset = 10 * float3(_Phase, -phaseabs, -phaseabs);
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float3 normal = v.normal;
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float3 viewdir = normalize(ObjSpaceViewDir(v.vertex));
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o.position = UnityObjectToClipPos(v.vertex);
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o.color.rgb = 1 - phaseabs;
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o.color.a = 1;
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o.uv_MainTex = TRANSFORM_TEX(v.texcoord, _MainTex);
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o.normal = v.normal;
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o.viewdir = normalize(viewdir + offset);
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return o;
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}
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fixed4 frag(v2f i) : COLOR {
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fixed4 color = i.color;
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float alpha = MoonPhaseFactor(i.uv_MainTex, abs(_Phase));
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fixed shading = max(0, dot(i.normal, i.viewdir));
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color.rgb *= pow(shading, 0.5);
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// Moon texture
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fixed3 moontex = tex2D(_MainTex, i.uv_MainTex);
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color.rgb *= moontex.rgb * 2.5;
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float lum = dot(color.rgb, float3(0.8, 0.8, 0.8));
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color.a = min(color.a, lum * alpha);
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color.rgb = saturate(1.0 - exp(-_Brightness * color.rgb));
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return float4(color.rgb, color.a * _moonFogIntensity);
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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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