outline on hover

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Assets/QuickOutline/Resources/Materials/OutlineFill.mat

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+--- !u!21 &2100000
+Material:
+  serializedVersion: 6
+  m_ObjectHideFlags: 0
+  m_PrefabParentObject: {fileID: 0}
+  m_PrefabInternal: {fileID: 0}
+  m_Name: OutlineFill
+  m_Shader: {fileID: 4800000, guid: 4e76d4023d7e0411297c670f878973e2, type: 3}
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+    m_Floats:
+    - _OutlineWidth: 2
+    - _ZTest: 8
+    m_Colors:
+    - _OutlineColor: {r: 1, g: 1, b: 1, a: 1}

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Assets/QuickOutline/Resources/Materials/OutlineMask.mat

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Assets/QuickOutline/Resources/Shaders.meta

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Assets/QuickOutline/Resources/Shaders/OutlineFill.shader

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+//
+//  OutlineFill.shader
+//  QuickOutline
+//
+//  Created by Chris Nolet on 2/21/18.
+//  Copyright © 2018 Chris Nolet. All rights reserved.
+//
+
+Shader "Custom/Outline Fill" {
+  Properties {
+    [Enum(UnityEngine.Rendering.CompareFunction)] _ZTest("ZTest", Float) = 0
+
+    _OutlineColor("Outline Color", Color) = (1, 1, 1, 1)
+    _OutlineWidth("Outline Width", Range(0, 10)) = 2
+  }
+
+  SubShader {
+    Tags {
+      "Queue" = "Transparent+110"
+      "RenderType" = "Transparent"
+      "DisableBatching" = "True"
+    }
+
+    Pass {
+      Name "Fill"
+      Cull Off
+      ZTest [_ZTest]
+      ZWrite Off
+      Blend SrcAlpha OneMinusSrcAlpha
+      ColorMask RGB
+
+      Stencil {
+        Ref 1
+        Comp NotEqual
+      }
+
+      CGPROGRAM
+      #include "UnityCG.cginc"
+
+      #pragma vertex vert
+      #pragma fragment frag
+
+      struct appdata {
+        float4 vertex : POSITION;
+        float3 normal : NORMAL;
+        float3 smoothNormal : TEXCOORD3;
+        UNITY_VERTEX_INPUT_INSTANCE_ID
+      };
+
+      struct v2f {
+        float4 position : SV_POSITION;
+        fixed4 color : COLOR;
+        UNITY_VERTEX_OUTPUT_STEREO
+      };
+
+      uniform fixed4 _OutlineColor;
+      uniform float _OutlineWidth;
+
+      v2f vert(appdata input) {
+        v2f output;
+
+        UNITY_SETUP_INSTANCE_ID(input);
+        UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
+
+        float3 normal = any(input.smoothNormal) ? input.smoothNormal : input.normal;
+        float3 viewPosition = UnityObjectToViewPos(input.vertex);
+        float3 viewNormal = normalize(mul((float3x3)UNITY_MATRIX_IT_MV, normal));
+
+        output.position = UnityViewToClipPos(viewPosition + viewNormal * -viewPosition.z * _OutlineWidth / 1000.0);
+        output.color = _OutlineColor;
+
+        return output;
+      }
+
+      fixed4 frag(v2f input) : SV_Target {
+        return input.color;
+      }
+      ENDCG
+    }
+  }
+}

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Assets/QuickOutline/Resources/Shaders/OutlineMask.shader

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+//
+//  OutlineMask.shader
+//  QuickOutline
+//
+//  Created by Chris Nolet on 2/21/18.
+//  Copyright © 2018 Chris Nolet. All rights reserved.
+//
+
+Shader "Custom/Outline Mask" {
+  Properties {
+    [Enum(UnityEngine.Rendering.CompareFunction)] _ZTest("ZTest", Float) = 0
+  }
+
+  SubShader {
+    Tags {
+      "Queue" = "Transparent+100"
+      "RenderType" = "Transparent"
+    }
+
+    Pass {
+      Name "Mask"
+      Cull Off
+      ZTest [_ZTest]
+      ZWrite Off
+      ColorMask 0
+
+      Stencil {
+        Ref 1
+        Pass Replace
+      }
+    }
+  }
+}

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