[Gambas-user] gb3: OpenGL help

[Kevin Fishburne]

I need some general help with implementing a few things in OpenGL. I 
know many new OpenGL functions were added to gb3, but am not sure of the 
extent or what I need to do with them.

I need to create a polygonal grid and apply different textures to 
different parts of it. The grid should be a single object for purposes 
of shading and light sources. I've heard of a "multitexture" function, 
but am not sure if that's what I need.

As a usage example, let's say I have a 16x16 grid of landscape tiles. 
The images for each tile are in an array of OpenGL textures, so I have 
256 separate OpenGL textures. I want to create a polygonal grid object 
with subdivisions representing the 16x16 tiles and draw the 256 textures 
onto the grid. Is this possible in OpenGL in general, or in gb3's OpenGL 
implementation specifically?

Think of it like drawing the screen tiles for an old Ultima-style game, 
but the tiles would be on a single polygonal object.

I'd also like to know if billboard-style textures are supported in gb3's 
OpenGL implementation, which I'll need to implement should the first 
point be possible. Any help would be greatly appreciated. A kind gb user 
also sent me the OpenGL redbook, which I can use for reference if the 
functions are supported by gb.

-- 
Kevin Fishburne
Eight Virtues
www: http://sales.eightvirtues.com
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