// Shader created with Shader Forge v1.37 
// 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 "VRChat/Panosphere" {
    Properties {
        _MainTex ("MainTex", 2D) = "white" {}
        [MaterialToggle] _StereoEnabled ("Stereo Enabled", Float ) = 0
    }
    SubShader {
        Tags {
            "RenderType"="Opaque"
        }
        Pass {
            Name "FORWARD"
            Tags {
                "LightMode"="ForwardBase"
            }
            
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #define UNITY_PASS_FORWARDBASE
            #include "UnityCG.cginc"
            #pragma multi_compile_fwdbase_fullshadows
            #pragma only_renderers d3d9 d3d11 glcore gles n3ds wiiu 
            #pragma target 3.0
            uniform sampler2D _MainTex; uniform float4 _MainTex_ST;
            float2 StereoPanoProjection( float3 coords ){
            float3 normalizedCoords = normalize(coords);
            float latitude = acos(normalizedCoords.y);
            float longitude = atan2(normalizedCoords.z, normalizedCoords.x);
            float2 sphereCoords = float2(longitude, latitude) * float2(0.5/UNITY_PI, 1.0/UNITY_PI);
            sphereCoords = float2(0.5,1.0) - sphereCoords;
            return (sphereCoords + float4(0, 1-unity_StereoEyeIndex,1,0.5).xy) * float4(0, 1-unity_StereoEyeIndex,1,0.5).zw;
            }
            
            float2 MonoPanoProjection( float3 coords ){
            float3 normalizedCoords = normalize(coords);
            float latitude = acos(normalizedCoords.y);
            float longitude = atan2(normalizedCoords.z, normalizedCoords.x);
            float2 sphereCoords = float2(longitude, latitude) * float2(1.0/UNITY_PI, 1.0/UNITY_PI);
            sphereCoords = float2(1.0,1.0) - sphereCoords;
            return (sphereCoords + float4(0, 1-unity_StereoEyeIndex,1,1.0).xy) * float4(0, 1-unity_StereoEyeIndex,1,1.0).zw;
            }
            
            uniform fixed _StereoEnabled;
            struct VertexInput {
                float4 vertex : POSITION;
            };
            struct VertexOutput {
                float4 pos : SV_POSITION;
                float4 posWorld : TEXCOORD0;
            };
            VertexOutput vert (VertexInput v) {
                VertexOutput o = (VertexOutput)0;
                o.posWorld = mul(unity_ObjectToWorld, v.vertex);
                o.pos = UnityObjectToClipPos( v.vertex );
                return o;
            }
            float4 frag(VertexOutput i) : COLOR {
                float3 viewDirection = normalize(_WorldSpaceCameraPos.xyz - i.posWorld.xyz);
////// Lighting:
////// Emissive:
                float3 node_6020 = (viewDirection*(-1.0));
                float2 _StereoEnabled_var = lerp( MonoPanoProjection( node_6020 ), StereoPanoProjection( node_6020 ), _StereoEnabled );
                float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(_StereoEnabled_var, _MainTex));
                float3 emissive = _MainTex_var.rgb;
                float3 finalColor = emissive;
                return fixed4(finalColor,1);
            }
            ENDCG
        }
    }
    FallBack "Diffuse"
    CustomEditor "ShaderForgeMaterialInspector"
}