SurfaceShader vert function

hello

I want to change texture UV in Vert function of Surface shader
here is Vertex\Fragment code:


I want same thing on Surface shader
how can i use this code on Surface shader code?

My purpose is change UV tiling on vertex shader of surface shader

 

Use a custom vertex function.

See the example for "Custom data computed per-vertex":
https://docs.unity3d.com/Manual/SL-SurfaceShaderExamples.html

Replace float3 customColor; with float2 customUV; and o.customColor = ... with o.customUV = v.texcoord.xy * _MainTex_ST.xy * 7 + _MainTex_ST.zw;

Alternatively you could just use tex2D(_DetailTex, IN.uv_MainTex * 7) in your surface shader and get basically the same result; exactly the same if you don't use any texture offset.

 

Thank you. I'll try it


My purpose is create custom UV like Unreal mobile uv tiling solution. Its fast and solve Tiling blocky texture in Mali400 GPUs


I test on simple fragment shader and it worked
https://docs.unrealengine.com/latest/INT/Engine/Rendering/Materials/CustomizedUVs/


Its unreal mobile test:
download APK:Link

 

you help me a lot. I spend 7 hours yesterday without result and your help solve my hole problem.
thanks again.


my code:

Code (CSharp):

1. Shader "Custom/DetailSurface" {
2.     Properties {
3.         _MainTex ("Base (RGB)", 2D) = "white" {}
4.         _DetailTex ("Base (RGB)", 2D) = "white" {}
5.     }
6.     SubShader {
7.         Tags { "RenderType"="Opaque" }
8.         LOD 200
9.        
10.         CGPROGRAM
11.         #pragma surface surf Lambert vertex:vert
12.         #pragma target 3.0
13.         sampler2D _MainTex;
14.         sampler2D _DetailTex;  
15.  
16.         struct Input {
17.             float2 uv_MainTex;
18.             float2 uv_DetailTex;
19. float2 customUV;      
20.            
21.         };
22.         void vert (inout appdata_full v, out Input o) {
23.           UNITY_INITIALIZE_OUTPUT(Input,o);
24.           o.customUV = v.texcoord.xy * 7;
25.       }
26.         void surf (Input IN, inout SurfaceOutput o) {
27.             half4 c = tex2D (_MainTex, IN.uv_MainTex)*tex2D (_DetailTex, IN.customUV);
28.             o.Albedo = c.rgb*7;
29.  
30.             o.Alpha = c.a;
31.         }
32.         ENDCG
33.     }
34.     FallBack "Diffuse"
35. }
36.  

result on Mali400: