[ODE] vanishing objects and clearing all objects

[Thomas Grimes]

I have made a simple ODE demo that does the same thing as the box dropping 
demo that comes with the ODE source. Well for some odd reason mine is having 
issues. For one, when I made my demo let me drop more than one box at once I 
noticed that sometimes, not always, a small group of my boxes will just 
vanish! Now I have my program setup so that you can't drop more than 10 
boxes and if you try to it does nothing, it wont execute the code that 
creates new boxes and such. What would cause some of the objects to just 
vanish?

Also, I have an option that when I hit the 'c' key, all of the boxes get 
cleared so I can drop some more. Here is what that part looks like:

if( KEYDOWN( buffer, DIK_C ) && !KEYDOWN( oldbuff, DIK_C ) )	// Clear the 
box (C key)
{
   for( int i = 0; i < obj_num; ++i )
  {
      dBodyDestroy( g_obj[i].body );
      dGeomDestroy( g_obj[i].geom[0] );
      memset( &g_obj[i], 0, sizeof( g_obj[i] ) );

      t = next_obj = obj_num = 0;
  }

  dropped = false;
}

Ok after I do this all boxes are gone. But when I start dropping more boxes, 
it's like those old boxes still exist in the world and my new ones will 
bounce or sit on the old but invisible boxes. Why would it be doing that? 
When I hit 'c' I want all box objects I created to be gone completely and 
not leave their "ghost" in the world. Thanks.

_________________________________________________________________
The new MSN 8: smart spam protection and 2 months FREE*  
http://join.msn.com/?page=features/junkmail