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133 lines
3.8 KiB
133 lines
3.8 KiB
// SpaceUnity: Shader from Unity wiki
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Shader "SpaceUnity/PlanetStandard"
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{
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//Earth Shader created by Julien Lynge @ Fragile Earth Studios
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//Upgrade of a shader originally put together in Strumpy Shader Editor by Clamps
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//Feel free to use and share this shader, but please include this attribution
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Properties
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{
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_MainTex("_MainTex", 2D) = "black" {}
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_Normals("_Normals", 2D) = "black" {}
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_Lights("_Lights", 2D) = "black" {}
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_LightScale("_LightScale", Float) = 1
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_AtmosNear("_AtmosNear", Color) = (0.1686275,0.7372549,1,1)
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_AtmosFar("_AtmosFar", Color) = (0.4557808,0.5187039,0.9850746,1)
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_AtmosFalloff("_AtmosFalloff", Float) = 3
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}
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SubShader
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{
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Tags
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{
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"Queue"="Geometry"
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"IgnoreProjector"="False"
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"RenderType"="Opaque"
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}
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Cull Back
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ZWrite On
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ZTest LEqual
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ColorMask RGBA
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Fog{
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}
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CGPROGRAM
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#pragma surface surf BlinnPhongEditor
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#pragma target 2.0
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sampler2D _MainTex;
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sampler2D _Normals;
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sampler2D _Lights;
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float _LightScale;
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float4 _AtmosNear;
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float4 _AtmosFar;
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float _AtmosFalloff;
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struct EditorSurfaceOutput {
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half3 Albedo;
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half3 Normal;
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half3 Emission;
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half3 Gloss;
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half Specular;
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half Alpha;
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half4 Custom;
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};
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inline half4 LightingBlinnPhongEditor_PrePass (EditorSurfaceOutput s, half4 light)
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{
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half3 spec = light.a * s.Gloss;
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half4 c;
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c.rgb = (s.Albedo * light.rgb + light.rgb * spec);
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c.g -= .01 * s.Alpha;
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c.r -= .03 * s.Alpha;
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c.rg += min(s.Custom, s.Alpha);
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c.b += 0.75 * min(s.Custom, s.Alpha);
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c.b = saturate(c.b + s.Alpha * .02);
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c.a = 1.0;
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return c;
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}
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inline half4 LightingBlinnPhongEditor (EditorSurfaceOutput s, half3 lightDir, half3 viewDir, half atten)
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{
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half3 h = normalize (lightDir + viewDir);
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half diff = max (0, dot ( lightDir, s.Normal ));
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float nh = max (0, dot (s.Normal, h));
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float spec = pow (nh, s.Specular*128.0);
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half4 res;
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res.rgb = _LightColor0.rgb * diff;
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res.w = spec * Luminance (_LightColor0.rgb);
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res *= atten * 2.0;
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//s.Alpha is now 1 where the earth is dark. The value of night lights has been saved to Alpha
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half invdiff = 1 - saturate(16 * diff);
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s.Alpha = invdiff;
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return LightingBlinnPhongEditor_PrePass( s, res );
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}
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struct Input {
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float3 viewDir;
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float2 uv_MainTex;
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float2 uv_Normals;
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float2 uv_Lights;
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};
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void surf (Input IN, inout EditorSurfaceOutput o) {
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o.Gloss = 0.0;
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o.Specular = 0.0;
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o.Custom = 0.0;
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o.Alpha = 1.0;
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float4 Fresnel0_1_NoInput = float4(0,0,1,1);
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float4 Fresnel0=(1.0 - dot( normalize( float4( IN.viewDir.x, IN.viewDir.y,IN.viewDir.z,1.0 ).xyz), normalize( Fresnel0_1_NoInput.xyz ) )).xxxx;
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float4 Pow0=pow(Fresnel0,_AtmosFalloff.xxxx);
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float4 Saturate0=saturate(Pow0);
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float4 Lerp0=lerp(_AtmosNear,_AtmosFar,Saturate0);
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float4 Multiply1=Lerp0 * Saturate0;
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float4 Sampled2D2=tex2D(_MainTex,IN.uv_MainTex.xy);
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float4 Add0=Multiply1 + Sampled2D2;
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float4 Sampled2D0=tex2D(_Normals,IN.uv_Normals.xy);
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float4 UnpackNormal0=float4(UnpackNormal(Sampled2D0).xyz, 1.0);
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o.Albedo = Add0;
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o.Normal = UnpackNormal0;
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//o.Emission = Multiply0;
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o.Emission = 0.0;
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//float4 Multiply0=Sampled2D1 * _LightScale.xxxx;
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o.Custom = tex2D(_Lights,IN.uv_Lights.xy).r * _LightScale;
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o.Normal = normalize(o.Normal);
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}
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ENDCG
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}
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Fallback "Diffuse"
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}
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