i'm currently using billboarding for trees and clouds in my flight simulator. The problem is that it works only in two dimensions: it is perfect for a game like Quake, but in a flight simulator, when you pass above the trees you clearly see they are quads. How is possible to overcome to this ? There are other techniques ?
Originally posted by penetrator:
i'm currently using billboarding for trees and clouds in my flight simulator. The problem is that it works only in two dimensions: it is perfect for a game like Quake, but in a flight simulator, when you pass above the trees you clearly see they are quads. How is possible to overcome to this ? There are other techniques ?
Trees - the first one solution comes to mind is to use polygonal trees. Where to get - for ex speedtree http://www.idvinc.com/
tool assist to develop the trees
we at the company are developing trees manually http://www.vrtainment.com/vrtainment...ects/trees.htm
clouds take a look here http://www.cs.unc.edu/~harrism/SkyWorks/
also from DX sample the idea of multiple cloud layers could be used link to DX sample is http://www.ati.com/developer/samples/clouds.html
some more on trees...
I'm not sure but maybe
Relief Tetxure Mapping see http://www.paralelo.com.br/en/portfo...d/cg/index.php
could be used...
[This message has been edited by SergeVrt (edited 06-15-2003).]
For cheap, in-the-distance trees, try modeling the tree as three quads: an X capped with an upwards-facing quad on or near the top.
For better quality, use polygonal models, although these get expensive fast. Look into various impostor techniques (render-to-texture) to improve the rendering speed (assuming you have the texture memory).
"If you can't afford to do something right,
you'd better make sure you can afford to do it wrong!"
Posting Permissions
