Fur shader

Just finished porting Fur shader to shaderlab.
It was an easy one, and I'm pretty sure that I've done it 100% right, although I might have made a mistake somewhere so you might want to read through it.

I'm not quite sure how to use it properly lol, I tried attaching it to a sphere, and even though the shader works fine and has some decent effect, I can't seem to understand why it's called "Fur shader" because it doesn't do anything fur-ish

Maybe I just don't know how to use it properly, tell me if you manage to get anything interesting out of it

Code (csharp):

1. Shader "Edvinas/FurShader" {
2.     Properties {
3.         s_diffuse_texture("g_diffuse_texture", 2D) = "white" {}
4.         s_detail_texture("g_detail_texture", 2D) = "white" {}
5.         g_layer("g_layer", Float) = 1.0
6.         g_fur_current_length("g_fur_current_length", Float) = 1.0
7.         light_colour("light_color", Color) = (1,1,1)
8.            
9.         g_wind_direction("g_wind_direction", Float) = 1.0
10.         g_wind_magnitutde("g_wind_magnitutde", Float) = 1.0
11.         g_wind_speed("g_wind_speed", Float) = 1.0
12.         g_wind_fizzling("g_wind_fizzling", Float) = 1.0
13.            
14.         _Cutoff ("Alpha cutoff", Range (0,1)) = 0.5
15.        
16.     }
17.    
18.     SubShader {
19. Pass {
20.  
21. Cull Off
22. Blend SrcAlpha OneMinusSrcAlpha
23. AlphaTest Greater [_Cutoff]
24.    
25. CGPROGRAM
26.  
27.  
28. #pragma target 3.0
29. #pragma vertex vert
30. #pragma fragment frag
31. #include "UnityCG.cginc"
32.  
33.  
34.     sampler2D s_detail_texture;
35.     sampler2D s_diffuse_texture;
36.  
37.    
38.     float g_layer;
39.     float g_fur_current_length;
40.    
41.     float2 g_wind_direction;
42.     float g_wind_magnitutde;
43.     float2 g_wind_speed;
44.     float g_wind_fizzling;
45.    
46.     float3 light_colour;
47.    
48.     float3 directional_lighting_colour(float3 normal, float3 light_dir)
49. {
50.     return light_colour * saturate(dot(light_dir, normal));    
51.  
52. }
53.  
54. struct v2f
55. {
56.     float4  position    : POSITION;
57.     float3  normal      : TEXCOORD0;
58.     float2  texcoord_uv : TEXCOORD1;   
59. };
60.  
61.  
62.  
63.  
64. v2f vert ( appdata_base v) {
65. appdata_tan n;
66. v2f r;
67.  
68.   //r.position = mul(glstate.matrix.mvp, v.vertex);
69.   float4 pos = v.vertex;
70.    
71.     float fur_length        = float(float(g_layer + 1) / 30.0f);
72.     float fur_length_scalar = 0.8;
73.     pos.xyz                 += (v.normal * fur_length);
74.    
75. // now apply the wind effect
76.     //g_dir                 = mul(g_dir, g_world);
77.     float k                 = pow(fur_length , g_wind_fizzling);
78.     //float k                   = pow(fur_length , 3);
79.     pos.xz                  += k * g_wind_direction;
80.     r.position              = mul(glstate.matrix.mvp, pos);
81.     // pass the normal
82.     r.normal                = v.normal;
83.    
84.     // pass the texture coordinates as is
85.     r.texcoord_uv           = v.texcoord * 20;
86.    
87.   return r;
88.  
89. }
90.  
91. float4 frag (v2f v) : COLOR {
92.    
93.     // read the pixels from the samplers
94.     float4 diffuse_pixel    = tex2D(s_diffuse_texture, v.texcoord_uv);
95.     float4 detail_pixel     = tex2D(s_detail_texture, v.texcoord_uv);
96.    
97.     // Detail Mapping
98.     diffuse_pixel.rgb       = lerp(diffuse_pixel.rgb, detail_pixel.rgb, detail_pixel.a);
99.  
100.     // calculate diffuse color
101.     detail_pixel.rgb        *= directional_lighting_colour(v.normal.rgb, light_colour);
102.    
103.     float4 finalcolor       = float4(detail_pixel.rgb,diffuse_pixel.a);
104.     //finalcolor            = float4(diffuse_pixel.rgb + glstate.lightmodel.ambient,diffuse_pixel.a);
105.     //finalcolor            = float4(diffuse_pixel.rgb, diffuse_pixel.a);
106.     //finalcolor            = float4(normal_pixel.rgb, diffuse_pixel.a);
107.     //finalcolor            = float4(v.normal.rgb, diffuse_pixel.a);
108.    
109.     return finalcolor;
110.  
111. }
112.  
113. ENDCG
114.  
115. }
116.  
117.     }
118.  
119. }
120.  
121.  

Thanks

 

Where did you port this from?

 

Hmm this is an Old thread, but honestly i haven't read this yet. Is anyone tried it already?