Initial commit

Assets/ThirdpartyAssets/GradientSkybox/CircularTwoColorGradientSkybox.shader

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+Shader "GradientSkybox/Circular/Two Color" {
+	Properties {
+		_InnerColor ("Inner Color", Color) = (0.8, 0.8, 0.8, 0)
+		_OuterColor ("Outer Color", Color) = (0.5, 0.5, 0.5, 0)
+		[KeywordEnum(None, X, Y)] _Norm ("Normalization", Float) = 0
+	}
+	SubShader {
+		Tags {
+			"RenderType" = "Background"
+			"Queue" = "Background"
+			"PreviewType" = "Skybox"
+		}
+		Pass {
+			ZWrite Off
+			Cull Off
+
+			CGPROGRAM
+
+			#pragma vertex vert
+			#pragma fragment frag
+			#pragma multi_compile _NORM_NONE _NORM_X _NORM_Y
+
+			fixed3 _InnerColor, _OuterColor;
+
+			struct appdata {
+				float4 vertex : POSITION;
+			};
+
+			struct v2f {
+				float4 vertex : SV_POSITION;
+			};
+
+			v2f vert (appdata v) {
+				v2f o;
+				o.vertex = UnityObjectToClipPos(v.vertex);
+				return o;
+			}
+
+			fixed4 frag (v2f i) : SV_TARGET {
+				#if _NORM_X
+					float2 uv = (i.vertex.xy / _ScreenParams.x - _ScreenParams.xy / _ScreenParams.x * 0.5) * 2;
+				#elif _NORM_Y
+					float2 uv = (i.vertex.xy / _ScreenParams.y - _ScreenParams.xy / _ScreenParams.y * 0.5) * 2;
+				#else
+					float2 uv = (i.vertex.xy / _ScreenParams.xy - 0.5) * 2;
+				#endif
+				return fixed4(lerp(_InnerColor, _OuterColor, length(uv)), 1);
+			}
+
+			ENDCG
+		}
+	}
+	CustomEditor "GradientSkybox.CircularTwoColorGradientSkyboxGUI"
+}