Raydium 3D Game Engine

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PostPosted: Thu Jun 01, 2006 7:06 am 
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Joined: Sun May 28, 2006 7:17 pm
Posts: 12
Location: USA
Hi again, more dumb questions from me.

I've got a few objects loaded, using raydium_ode_object_create, and then raydium_ode_object_sphere_add. I don't have a uv map applied to them and I just want to change their colors. I found the function raydium_rendering_rgb_force, and that worked fine for changing both of the meshes to the same color, but what can I do to make the 2 meshes have different colors?

I think I could just set the material in blender, but I'm wondering if I could do it with something like the rendering_rgb_force function to have a bunch of different colors in game. I would like to just be able to pass an rgb value to different objects I have loaded.

If not, do I need to load a material with something like this?
raydium_texture_load("rgb(0.8,0.1,0.1)")

After loading the material or texture, I was confused how to apply it to the mesh. I think I need to apply the texture to each vertice, but I'm still confused. This is my first time working with opengl, so I was wondering if Raydium had something built in to do that for me. I've taken a look through the code to see how it's loading the texture from the .tri files but it's a bit overwhelming to me.

Thanks :)


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PostPosted: Thu Jun 01, 2006 9:40 pm 
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Joined: Sun Mar 16, 2003 2:53 am
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The idea is quite simple : use the raydium_ode_BeforeElementDrawCallback and raydium_ode_AfterElementDrawCallback callbacks to force the needed color.

You must be able to detect each element to apply the correct color, and the best method is to use tags :

Code:
char draw_element_before(int elem)
{
int tag;
tag=raydium_ode_element_tag_get(elem);
switch(tag)
   {
   case 1: raydium_rendering_rgb_force(...); break;
   case 2: raydium_rendering_rgb_force(...); break;
   ...
   }
return 1; // draw element
}

void draw_element_after(int elem)
{
raydium_rendering_rgb_normal();
}

[...]
// objects creation
raydium_ode_object_sphere_add("element1",obj1,0.5,RAYDIUM_ODE_AUTODETECT,RAYDIUM_ODE_STANDARD,1,"mesh.tri");
[...]
raydium_ode_object_sphere_add("element2",obj2,0.5,RAYDIUM_ODE_AUTODETECT,RAYDIUM_ODE_STANDARD,2,"mesh.tri");
[...]
// before calling raydium_callback() :
raydium_ode_BeforeElementDrawCallback=draw_element_before;
raydium_ode_AfterElementDrawCallback=draw_element_after;


Dunno if it's clear ? :)


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PostPosted: Fri Jun 02, 2006 6:51 am 
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Joined: Sun May 28, 2006 7:17 pm
Posts: 12
Location: USA
That works great, thanks for all the help again Xfennec. :D


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