Unity iphone shader with vertex blending and lightmaps?

ZacD · Aug 2010

I don't know anything about making shaders, and was wondering if anyone can help me with this.

osman · Aug 2010

I think if you have the Unity iPhone, you get some that already do that

. If you're like me, and first develop most of your stuff on a pc, using Unity Basic, then what you can do is, download a trial of Unity iPhone, and snatch the shaders from there. And once you're ready to publish your game you'll have to buy Unity Iphone anyways.
Hope that helps.

ZacD · Aug 2010

I couldn't find any finished shaders doing what I wanted, I think I figured out everything but how to do the actual blending.

I think I figured out how to get everything set up and loaded, now I just need to figure out set up the actual blending, if anyone has any ideas.

[code]Shader "1UV lightmap with vertex blending" {

ZacD · Aug 2010

I think I realized my problem, The vertex colors wont export. What format should I work with? I'm using XSI.

ZacD · Aug 2010

Finally got the colored vertexes to work, now I gotta figure out how to blend it properly.

ZacD · Aug 2010

Yay for more issues, vertex colors with no shading.

rube · Aug 2010

check the #unity irc channel on irc.freenode.net (same network as #model_design). There's a few iphone devs there that may know the answer.

ZacD · Aug 2010

Got it working properly, finally.

renderhjs · Aug 2010

post at least some nugget or directions on how you did it or what the issue was, otherwise its a useless post for anyone else,
thx

ZacD · Aug 2010

There's not many XSI users here, but I'll throw together a quick tutorial.

Here the shader.

Shader "Blend + Lightmap" {

Properties
{
   _MainTex ("Texture 1  (vertex A  = white)", 2D) = ""
   _Texture2 ("Texture 2  (vertex A = black)", 2D) = ""
   _LightMap ("Lightmap (RGB)", 2D) = "" { LightmapMode } 
}

SubShader
{
   BindChannels
   {
      Bind "vertex", vertex
      Bind "color", color
      Bind "texcoord", texcoord
   }
   
   Pass
   {
      SetTexture [_MainTex]
      SetTexture [_Texture2] {combine previous lerp(primary) texture}
      SetTexture [_LightMap] {combine texture * previous} 
    }
}

 
}

In xsi set up the lighting for the scene, make sure everything has unique UV's, and create a render map.

shift+w brings up vertex color mode.
ctrl+w brings up the options.

It has to be in alpha mode, and in order for the alpha colors to show up in the view port, go to display options > Vertex color > show alpha.

I exported as a fbx, I dunno if it works with the other formats.

If you have the weird vertex issue that I had above, just select the geometry under polygon selection and extract polygons and delete, my issue may of happened because I tried to merge floaters/seperate pieces of geometry.

sama.van · Aug 2010

Maybe you already know this section of Unify but....

http://www.unifycommunity.com/wiki/index.php?title=Shaders

Unity iphone shader with vertex blending and lightmaps?

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