Add glow shader for bounding cube

Assets/Shaders/SelectionGlow.shader

@@ -0,0 +1,71 @@
+Shader "ConformalDecals/SelectionGlow"
+{
+    Properties
+    {
+		[Header(Effects)]
+            _RimEdgeGlow("Rim Edge Glow", Range(0, 1)) = 0.45
+            _RimEdgePow("Rim Edge Falloff", Range(0,5)) = 5
+            _RimEdgeOpacity("Rim Edge Opacity", Range(0,1)) = 0.2
+			_RimFalloff("Rim Falloff", Range(0.01,5) ) = 0.1
+			_RimColor("Rim Color", Color) = (0,0,0,0)
+    }
+    SubShader
+    {
+        Tags { "Queue" = "Transparent" }
+        Cull Back
+        
+        Pass
+        {
+     		Blend One One
+
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+
+            half _RimEdgeGlow;
+            half _RimEdgePow;
+            half _RimEdgeOpacity;
+            float _RimFalloff;
+            float4 _RimColor;
+            
+            #include "UnityCG.cginc"
+            #include "Lighting.cginc"
+            #include "AutoLight.cginc"
+
+            struct v2f {
+                float4 pos : SV_POSITION;
+                float2 uv : TEXCOORD0;
+                float3 worldPosition : TEXCOORD1;
+                half3 worldNormal : TEXCOORD2;
+            };
+
+            v2f vert(float4 vertex : POSITION, float3 normal : NORMAL, float2 uv : TEXCOORD0) {
+                v2f o;
+                o.pos = UnityObjectToClipPos(vertex);
+                o.uv = uv;
+                o.worldPosition = mul(unity_ObjectToWorld, vertex).xyz;
+                o.worldNormal = UnityObjectToWorldNormal(normal);
+                return o;
+            }
+
+            fixed4 frag (v2f i) : SV_Target {
+                fixed4 c = 0;
+
+                float3 worldViewDir = normalize(UnityWorldSpaceViewDir(i.worldPosition));
+                half rim = 1.0 - saturate(dot (normalize(worldViewDir), i.worldNormal));
+                c.rgb = (_RimColor.rgb * pow(rim, _RimFalloff)) * _RimColor.a;
+                half edgeGlow = 0;
+                edgeGlow = max(edgeGlow, pow(1-saturate(i.uv.x / _RimEdgeGlow), _RimEdgePow));
+                edgeGlow = max(edgeGlow, pow(1-saturate(i.uv.y / _RimEdgeGlow), _RimEdgePow));
+                edgeGlow = max(edgeGlow, pow(1-saturate((1-i.uv.x) / _RimEdgeGlow), _RimEdgePow));
+                edgeGlow = max(edgeGlow, pow(1-saturate((1-i.uv.y) / _RimEdgeGlow), _RimEdgePow));
+
+                c.rgb = max(c.rgb, _RimColor.rgb * _RimColor.a * edgeGlow * _RimEdgeOpacity);
+
+                return c;
+            }
+
+            ENDCG
+        } 
+    }
+}