// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'

// Shader created with Shader Forge v1.26 
// Shader Forge (c) Neat Corporation / Joachim Holmer - http://www.acegikmo.com/shaderforge/
// Note: Manually altering this data may prevent you from opening it in Shader Forge
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Shader "Exo-Planets/AtmosphereSun" {
    Properties {
        _AtmosphereColor ("Atmosphere Color", Color) = (0.006704159,0.9117647,0.9117647,1)
        _Atmospheresize ("Atmosphere size", Range(-1, 5)) = 0
    }
    SubShader {
        Tags {
            "IgnoreProjector"="True"
            "Queue"="Transparent+2"
            "RenderType"="Transparent"
        }
        Pass {
            Name "FORWARD"
            Tags {
                "LightMode"="ForwardBase"
            }
            Blend One One
            Cull Front
            ZWrite Off
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_FORWARDBASE
            #include "UnityCG.cginc"
            #pragma multi_compile_fwdbase
            #pragma exclude_renderers xbox360 ps3 
            #pragma target 3.0
            uniform float4 _AtmosphereColor;
            uniform float _Atmospheresize;
            struct VertexInput {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
            };
            struct VertexOutput {
                float4 pos : SV_POSITION;
                float4 posWorld : TEXCOORD0;
                float3 normalDir : TEXCOORD1;
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.normalDir = UnityObjectToWorldNormal(-v.normal);
                v.vertex.xyz += ((_Atmospheresize*1.0+0.0)*v.normal);
                o.posWorld = mul(unity_ObjectToWorld, v.vertex);
                o.pos = UnityObjectToClipPos(v.vertex );
                return o;
            }
            float4 frag(VertexOutput i) : COLOR {
                i.normalDir = normalize(i.normalDir);
                float3 viewDirection = normalize(_WorldSpaceCameraPos.xyz - i.posWorld.xyz);
                float3 normalDirection = i.normalDir;
////// Lighting:
////// Emissive:
                float3 node_1494 = (_AtmosphereColor.rgb*10.0*pow(saturate(dot(i.normalDir,viewDirection)),3.0));
                float3 emissive = node_1494;
                float3 finalColor = emissive + node_1494;
                return fixed4(finalColor,1);
            }
            ENDCG
        }
        Pass {
            Name "ShadowCaster"
            Tags {
                "LightMode"="ShadowCaster"
            }
            Offset 1, 1
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_SHADOWCASTER
            #include "UnityCG.cginc"
            #include "Lighting.cginc"
            #pragma fragmentoption ARB_precision_hint_fastest
            #pragma multi_compile_shadowcaster
            #pragma exclude_renderers xbox360 ps3 
            #pragma target 3.0
            uniform float _Atmospheresize;
            struct VertexInput {
                float4 vertex : POSITION;
                float3 normal : NORMAL;
            };
            struct VertexOutput {
                V2F_SHADOW_CASTER;
                float3 normalDir : TEXCOORD1;
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.normalDir = UnityObjectToWorldNormal(-v.normal);
                v.vertex.xyz += ((_Atmospheresize*1.0+0.0)*v.normal);
                o.pos = UnityObjectToClipPos(v.vertex );
                TRANSFER_SHADOW_CASTER(o)
                return o;
            }
            float4 frag(VertexOutput i) : COLOR {
                i.normalDir = normalize(i.normalDir);
                float3 normalDirection = i.normalDir;
                SHADOW_CASTER_FRAGMENT(i)
            }
            ENDCG
        }
    }
    FallBack "Diffuse"
    CustomEditor "ShaderForgeMaterialInspector"
}