Getting vertex color data in surface shaders

I simply can't get vertex colors to work using the "with COLOR semantic" line in my suface shader Input struct.
This is what it says in the docs:

float3 viewDir - will contain view direction, for computing Parallax effects, rim lighting etc.
float4 with COLOR semantic - will contain interpolated per-vertex color.
float4 screenPos - will contain screen space position for reflection effects. Used by WetStreet shader in Dark Unity for example.
float3 worldPos - will contain world space position.
float3 worldRefl - will contain world reflection vector if surface shader does not write to o.Normal. See Reflect-Diffuse shader for example.
float3 worldRefl; INTERNAL_DATA - will contain world reflection vector if surface shader writes to o.Normal. To get the reflection vector based on per-pixel normal map, use WorldReflectionVector (IN, o.Normal). See Reflect-Bumped shader for example.

But when I put in the "float4 with COLOR semantic", I just get this error:

 

haha... of course, I get it now.
Well, that is somewhat a confusing way of documenting it, as in all other lines in that section you write exactly what it says. But in this one case it is an actual sentence
Well, I'm just stupid, I guess... It confused me, that's for sure...

Thanks a lot, Daniel!

 

Hmm i'm trying the same thing but I'm getting the error:

Code (csharp):

1. Shader error in 'PlayerShipShader': GLSL vertex shader: ERROR: 0:350: 'color' :  no such field in structure  at line 10
2.  

This is the code:

Code (csharp):

1.  
2. Shader "PlayerShipShader" {
3.  
4.     Properties {
5.  
6.         _Color ("Main Color", Color) = (1,1,1,0.5)
7.  
8.         _MainTex ("Base (RGB)", 2D) = "white" {}
9.  
10.     }
11.  
12.     SubShader {
13.  
14.         Tags {"Queue" = "Geometry" }
15.  
16.         Lighting Off
17.  
18.        
19.  
20.         CGPROGRAM
21.  
22.         #pragma surface surf Lambert
23.  
24.  
25.  
26.         float4 _Color;
27.  
28.         sampler2D _MainTex;
29.  
30.  
31.  
32.         struct Input {
33.  
34.             float4 screenPos;
35.  
36.             float4 vertColor : COLOR;
37.  
38.         };
39.  
40.  
41.  
42.         void surf (Input IN, inout SurfaceOutput o) {
43.  
44.             float2 screenUV = IN.screenPos.xy / IN.screenPos.w;
45.  
46.             half4 c = tex2D (_MainTex, screenUV);
47.  
48.             c = c * _Color * IN.vertColor;
49.  
50.             o.Albedo = c.rgb;
51.  
52.             o.Alpha = c.a;
53.  
54.         }
55.  
56.         ENDCG
57.  
58.     }
59.  
60. }
61.  

 

Yeah.. I have the same problem... Have somene solved this problem?

 

Ok... if you don't use.. float4 color : COLOR: it's not going to work!

 

yes I just encountered the same problem. The docs don't give you required information. You HAVE to have:

float4 color : COLOR;

 

It works for me

Code (csharp):

1. Shader "Vertex Colored Alpha Surf Shader" {
2.     Properties {
3.         _MainTex ("Base (RGB)", 2D) = "white" {}
4.     }
5.     SubShader {
6.         Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" }
7.         LOD 200
8.        
9.         CGPROGRAM
10.         #pragma surface surf Lambert alpha
11.        
12.         sampler2D _MainTex;
13.  
14.         struct Input {
15.             float2 uv_MainTex;
16.             float4 color: Color; // Vertex color
17.         };
18.  
19.         void surf (Input IN, inout SurfaceOutput o) {
20.             half4 c = tex2D (_MainTex, IN.uv_MainTex);
21.             o.Albedo = c.rgb * IN.color.rgb; // vertex RGB
22.             o.Alpha = c.a * IN.color.a; // vertex Alpha
23.         }
24.         ENDCG
25.     }
26.     FallBack "Diffuse"
27. }
28.