Cleaned up code and sorted pith detection

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Assets/UCLAGameLab/Wireframe/Shaders/UCLA GameLab Cutout Wireframe.shader

+Shader "UCLA Game Lab/Wireframe/Single-Sided Cutout" 
+{
+	Properties 
+	{
+		_Color ("Line Color", Color) = (1,1,1,1)
+		_MainTex ("Main Texture", 2D) = "white" {}
+		_Thickness ("Thickness", Float) = 1
+	}
+
+	SubShader 
+	{
+		Pass
+		{
+			Tags { "RenderType"="Opaque" "Queue"="Geometry" }
+
+			Blend SrcAlpha OneMinusSrcAlpha 
+			LOD 200
+			
+			CGPROGRAM
+				#pragma target 5.0
+				#include "UnityCG.cginc"
+				#include "UCLA GameLab Wireframe Functions.cginc"
+				#pragma vertex vert
+				#pragma fragment frag
+				#pragma geometry geom
+
+				// Vertex Shader
+				UCLAGL_v2g vert(appdata_base v)
+				{
+					return UCLAGL_vert(v);
+				}
+				
+				// Geometry Shader
+				[maxvertexcount(3)]
+				void geom(triangle UCLAGL_v2g p[3], inout TriangleStream<UCLAGL_g2f> triStream)
+				{
+					UCLAGL_geom( p, triStream);
+				}
+				
+				// Fragment Shader
+				float4 frag(UCLAGL_g2f input) : COLOR
+				{	
+					float4 col = UCLAGL_frag(input);
+					if( col.a < 0.5f ) discard;
+					else col.a = 1.0f;
+					
+					return col;
+				}
+			
+			ENDCG
+		}
+	} 
+}

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Assets/UCLAGameLab/Wireframe/Shaders/UCLA GameLab Double-Sided Cutout Wireframe.shader

+Shader "UCLA Game Lab/Wireframe/Double-Sided Cutout" 
+{
+	Properties 
+	{
+		_Color ("Line Color", Color) = (1,1,1,1)
+		_MainTex ("Main Texture", 2D) = "white" {}
+		_Thickness ("Thickness", Float) = 1
+	}
+
+	SubShader 
+	{
+		Pass
+		{
+			Tags { "RenderType"="Opaque" "Queue"="Geometry" }
+
+			Blend SrcAlpha OneMinusSrcAlpha
+			Cull Off
+			LOD 200
+			
+			CGPROGRAM
+				#pragma target 5.0
+				#include "UnityCG.cginc"
+				#include "UCLA GameLab Wireframe Functions.cginc"
+				#pragma vertex vert
+				#pragma fragment frag
+				#pragma geometry geom
+
+				// Vertex Shader
+				UCLAGL_v2g vert(appdata_base v)
+				{
+					return UCLAGL_vert(v);
+				}
+				
+				// Geometry Shader
+				[maxvertexcount(3)]
+				void geom(triangle UCLAGL_v2g p[3], inout TriangleStream<UCLAGL_g2f> triStream)
+				{
+					UCLAGL_geom( p, triStream);
+				}
+				
+				// Fragment Shader
+				float4 frag(UCLAGL_g2f input) : COLOR
+				{	
+					float4 col = UCLAGL_frag(input);
+					if( col.a < 0.5f ) discard;
+					else col.a = 1.0f;
+					
+					return col;
+				}
+			
+			ENDCG
+		}
+	} 
+}

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Assets/UCLAGameLab/Wireframe/Shaders/UCLA GameLab Double-Sided Wireframe.shader

+Shader "UCLA Game Lab/Wireframe/Double-Sided" 
+{
+	Properties 
+	{
+		_Color ("Line Color", Color) = (1,1,1,1)
+		_MainTex ("Main Texture", 2D) = "white" {}
+		_Thickness ("Thickness", Float) = 1
+	}
+
+	SubShader 
+	{
+		Tags { "RenderType"="Transparent" "Queue"="Transparent" }
+		
+		// First pass that renders the back faces of the model (cull front faces)
+		Pass
+		{
+			Blend SrcAlpha OneMinusSrcAlpha 
+			ZWrite Off
+			Cull Front
+			LOD 200
+			
+			CGPROGRAM
+				#pragma target 5.0
+				#include "UnityCG.cginc"
+				#include "UCLA GameLab Wireframe Functions.cginc"
+				#pragma vertex vert
+				#pragma fragment frag
+				#pragma geometry geom
+
+				// Vertex Shader
+				UCLAGL_v2g vert(appdata_base v)
+				{
+					return UCLAGL_vert(v);
+				}
+				
+				// Geometry Shader
+				[maxvertexcount(3)]
+				void geom(triangle UCLAGL_v2g p[3], inout TriangleStream<UCLAGL_g2f> triStream)
+				{
+					UCLAGL_geom( p, triStream);
+				}
+				
+				// Fragment Shader
+				float4 frag(UCLAGL_g2f input) : COLOR
+				{	
+					return UCLAGL_frag(input);
+				}
+			
+			ENDCG
+		}
+		// Second pass to render the fronts of polygons.
+		// Guarantees render order of back then front to avoid render artifacts
+		Pass
+		{
+			Blend SrcAlpha OneMinusSrcAlpha 
+			ZWrite Off
+			Cull Back
+			LOD 200
+			
+			CGPROGRAM
+				#pragma target 5.0
+				#include "UnityCG.cginc"
+				#include "UCLA GameLab Wireframe Functions.cginc"
+				#pragma vertex vert
+				#pragma fragment frag
+				#pragma geometry geom
+
+				// Vertex Shader
+				UCLAGL_v2g vert(appdata_base v)
+				{
+					return UCLAGL_vert(v);
+				}
+				
+				// Geometry Shader
+				[maxvertexcount(3)]
+				void geom(triangle UCLAGL_v2g p[3], inout TriangleStream<UCLAGL_g2f> triStream)
+				{
+					UCLAGL_geom( p, triStream);
+				}
+				
+				// Fragment Shader
+				float4 frag(UCLAGL_g2f input) : COLOR
+				{	
+					return UCLAGL_frag(input);
+				}
+			
+			ENDCG
+		}
+	} 
+}

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Assets/UCLAGameLab/Wireframe/Shaders/UCLA GameLab Wireframe Functions.cginc

+//Algorithms and shaders based on code from this journal
+//http://cgg-journal.com/2008-2/06/index.html
+
+#ifndef UCLA_GAMELAB_WIREFRAME
+#define UCLA_GAMELAB_WIREFRAME
+
+#include "UnityCG.cginc"
+
+// DATA STRUCTURES //
+// Vertex to Geometry
+struct UCLAGL_v2g
+{
+	float4	pos		: POSITION;		// vertex position
+	float2  uv		: TEXCOORD0;	// vertex uv coordinate
+};
+
+// Geometry to  UCLAGL_fragment
+struct UCLAGL_g2f
+{
+	float4	pos		: POSITION;		// fragment position
+	float2	uv		: TEXCOORD0;	// fragment uv coordinate
+	float3  dist	: TEXCOORD1;	// distance to each edge of the triangle
+};
+
+// PARAMETERS //
+
+//float4 _Texture_ST;			// For the Main Tex UV transform
+float _Thickness = 1;		// Thickness of the wireframe line rendering
+float4 _Color = {1,1,1,1};	// Color of the line
+float4 _MainTex_ST;			// For the Main Tex UV transform
+sampler2D _MainTex;			// Texture used for the line
+
+// SHADER PROGRAMS //
+// Vertex Shader
+UCLAGL_v2g UCLAGL_vert(appdata_base v)
+{
+	UCLAGL_v2g output;
+	output.pos =  mul(UNITY_MATRIX_MVP, v.vertex);
+	output.uv = TRANSFORM_TEX (v.texcoord, _MainTex);//v.texcoord;
+
+	return output;
+}
+
+// Geometry Shader
+[maxvertexcount(3)]
+void UCLAGL_geom(triangle UCLAGL_v2g p[3], inout TriangleStream<UCLAGL_g2f> triStream)
+{
+	//points in screen space
+	float2 p0 = _ScreenParams.xy * p[0].pos.xy / p[0].pos.w;
+	float2 p1 = _ScreenParams.xy * p[1].pos.xy / p[1].pos.w;
+	float2 p2 = _ScreenParams.xy * p[2].pos.xy / p[2].pos.w;
+	
+	//edge vectors
+	float2 v0 = p2 - p1;
+	float2 v1 = p2 - p0;
+	float2 v2 = p1 - p0;
+
+	//area of the triangle
+ 	float area = abs(v1.x*v2.y - v1.y * v2.x);
+
+	//values based on distance to the edges
+	float dist0 = area / length(v0);
+	float dist1 = area / length(v1);
+	float dist2 = area / length(v2);
+	
+	UCLAGL_g2f pIn;
+	
+	//add the first point
+	pIn.pos = p[0].pos;
+	pIn.uv = p[0].uv;
+	pIn.dist = float3(dist0,0,0);
+	triStream.Append(pIn);
+
+	//add the second point
+	pIn.pos =  p[1].pos;
+	pIn.uv = p[1].uv;
+	pIn.dist = float3(0,dist1,0);
+	triStream.Append(pIn);
+	
+	//add the third point
+	pIn.pos = p[2].pos;
+	pIn.uv = p[2].uv;
+	pIn.dist = float3(0,0,dist2);
+	triStream.Append(pIn);
+}
+
+// Fragment Shader
+float4 UCLAGL_frag(UCLAGL_g2f input) : COLOR
+{			
+	//find the smallest distance
+	float val = min( input.dist.x, min( input.dist.y, input.dist.z));
+	
+	//calculate power to 2 to thin the line
+	val = exp2( -1/_Thickness * val * val );
+		
+	//blend between the lines and the negative space to give illusion of anti aliasing
+	float4 targetColor = _Color * tex2D( _MainTex, input.uv);
+	float4 transCol = _Color * tex2D( _MainTex, input.uv);
+	transCol.a = 0;
+	return val * targetColor + ( 1 - val ) * transCol;
+}
+
+
+#endif
\ No newline at end of file

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+Shader "UCLA Game Lab/Wireframe/Single-Sided" 
+{
+	Properties 
+	{
+		_Color ("Line Color", Color) = (1,1,1,1)
+		_MainTex ("Main Texture", 2D) = "white" {}
+		_Thickness ("Thickness", Float) = 1
+	}
+
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