On 2/12/07, Ken Taylor <[EMAIL PROTECTED]> wrote: > chris wrote: > > On 2/11/07, Ken Taylor <[EMAIL PROTECTED]> wrote: > > > > > > > if your physics - say bouncing boxes like my example - is performed in > > > > it's own local coordinate space then it could be made consistent every > > > > time - but I can't see how you would combine the rendering of this in > > > > realtime with the rendering of the scene > > > > > > I don't see why transforming from "physics simulation space" to world > space > > > for the purpose of rendering the frame is any more difficult than > > > transforming from, say, a model's local coordinate system to world > space. > > > > if it's not part of the scene when u simulate the physics then when > > you add the objects of the physics sim into the scene (assuming you > > have a way to do this over a series of frames) you could have all > > sorts of unrealistic things like objects passing thru others, objects > > not occluding when they should, no shadows etc. > > > > Well I could certainly see physics-related problems (passing through other > objects, collision detection, etc), but shadows and occluding should be > easy. Just change your transformation matrix while rendering the boxes to > move their vertices from physics-space to rendering space -- exactly the > same as if you were rendering a model defined in its own space. They should > be rendered just the same as everything else in the world.
ok, I can see how this would work now for rendering: as the physics moves the local objects, each frame you add them to the scene before rendering the scene. As you noted, the physics of the world and the local objects would not work together, but the rendering would. As long as it is efficient to add/remove them from the scene each frame, it's not ideal but I suppose it would work well for some situations. chris > > For example, if I wanted to put an md2 model in my world -- say, an > avatar -- it's defined in its own coordinate space, so I'll have to set up a > transformation to map from that space to where I want it to be in the world > I'm rendering. md2 models can still be rendered with shadows and proper > occlusion, so why couldn't a physics sub-system of a bunch of boxes? > > Ken > > > _______________________________________________ > vos-d mailing list > vos-d@interreality.org > http://www.interreality.org/cgi-bin/mailman/listinfo/vos-d > _______________________________________________ vos-d mailing list vos-d@interreality.org http://www.interreality.org/cgi-bin/mailman/listinfo/vos-d
