RE: [Algorithms] Bullets on walls

[Steve W. <Ste...@im...>]

Now you know why only the most efficient 3D engines provide battle damage.
Stephen has indicated the industry standard for adding damage to a texture.
It's not too expensive if you find the most efficient place to code it in
your engine...it's just an extra UV calc and blt, or discover a new way.  In
either way it's one of the features that really makes a difference...cause
without it it's like shooting blanks...think about some of the other
references with that phrase...and you'll see why it's unthinkable to go
without it.  :)

R&R

> From: Stephen J Baker [mailto:sj...@li...]
> 
> On Thu, 20 Jul 2000, Jaimi McEntire wrote:
> 
> > In d3d, this is the way I do it:
> > 
> > Create decals with a one pixel transparent border.
> > Then, set the texture address mode to "Clamp".
> > Calculate new UV coordinates for your decal based on the 
> wall, instead
> > of the Decal - then redraw the entire wall with your decal 
> texture and
> > new UV coordinates.
> > This way you do not have to clip at all. I would assume you could
> > do the same in OpenGL.
>  
> Doesn't this get a bit expensive when someone fires of an entire
> clip of ammo at one wall - and then walks right up to it to
> examine the damage?  Seems like each bullethole would be another
> complete overwrite of the entire wall...bye-bye pixel-fill rate!
> 
> 
> Steve Baker                      (817)619-2657 (Vox/Vox-Mail)
> L3Com/Link Simulation & Training (817)619-2466 (Fax)
> Work: sj...@li...           http://www.link.com
> Home: sjb...@ai...       http://web2.airmail.net/sjbaker1
> 
> 
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