Tiling Shader

for all your current and future tiling needs. (taken from nvidia's website)

Code (csharp):

1.  
2. Shader "Tiles" {
3.     Properties {
4.         _MainTex ("Base (RGB)", 2D) = "white" {}
5.         _gNumTiles ("Number Of Tiles", Range (1,100)) = 1
6.         _gThreshhold ("Edge Width", Range (0.0,2.0)) = 0.15
7.         _gEdgeColor ("Color", Color)  = (.5, .5, .5, 1)
8.     }
9.     SubShader {
10.         Tags { "RenderType"="Opaque" }
11.         LOD 200
12.        
13.         CGPROGRAM
14.         #pragma surface surf Lambert
15.  
16.         sampler2D _MainTex;
17.  
18.         struct Input {
19.             float2 uv_MainTex;
20.         };
21.        
22.         float _gNumTiles;
23.         float _gThreshhold;
24.         float4 _gEdgeColor;
25.        
26.     void surf (Input IN, inout SurfaceOutput o) {
27.            
28.         half size = 1.0/_gNumTiles;
29.         half2 Pbase = IN.uv_MainTex - fmod(IN.uv_MainTex,size.xx);
30.         half2 PCenter = Pbase + (size/2.0).xx;
31.         half2 st = (IN.uv_MainTex - Pbase)/size;
32.         half4 c1 = (half4)0;
33.         half4 c2 = (half4)0;
34.         half4 invOff = half4((1-_gEdgeColor.xyz),1);
35.         if (st.x > st.y) { c1 = invOff; }
36.         half threshholdB =  1.0 - _gThreshhold;
37.         if (st.x > threshholdB) { c2 = c1; }
38.         if (st.y > threshholdB) { c2 = c1; }
39.         half4 cBottom = c2;
40.         c1 = (half4)0;
41.         c2 = (half4)0;
42.         if (st.x > st.y) { c1 = invOff; }
43.         if (st.x < _gThreshhold) { c2 = c1; }
44.         if (st.y < _gThreshhold) { c2 = c1; }
45.         half4 cTop = c2;
46.         half4 tileColor = tex2D(_MainTex,PCenter);
47.         half4 result = tileColor + cTop - cBottom;
48.         o.Albedo = result.rgb;
49.         o.Alpha = result.a;
50.            
51.         }
52.         ENDCG
53.     }
54.     FallBack "Diffuse"
55. }
56.