Re: [Pyode-user] Collision Detection Bug

[Ethan Glasser-C. <gl...@cs...>]

Sorry Chris for the duplicate mail..

Chris Spencer wrote:
> As you can see, even those the circles never visibly come in contact
> with the square, PyODE is still registering collisions with the left
> circle. It's almost like PyODE thinks the square is positioned at
> (0,0), even though geombox.getPosition() confirms it's positioned in
> the center of the screen.

When I run this script, I get a huge amount of output, including a
huge number of lines like this:

Exception exceptions.ValueError: 'Non-placeable geoms do not have a
position.' in 'ode.collide_callback' ignored

However, I think I understand what you did wrong. Your error is "in"
the pygame drawing code. The position of a geom is always the center
of that geom. You got this right for your circles, but wrong for your
boxes. Attached is a patch which should draw boxes correctly.

There's 400 lines of source here. In the future, please give a simpler
reproduction case!

Ethan