Turn on Collision, but still can go through

[Qiliang He]

This is a weird thing. I turn on the collision using viz.collision(viz.ON), and all of the objects inside the boundary are impenetrable. But the problem occurs on the boundary. When I go really hard to the wall, sometimes I can go through!?

Does anybody have this experience? I use google sketchup to make the objects.

[Jeff]

How are controlling the viewpoint movements? Does the viewpoint go through when using the standard mouse navigation with default speed?

[Qiliang He]

Thank you for your prompt reply!

Yes. I use vizcam.KeyboardCamera with default speed and viz.WalkNavigate, and both of them would go out of the boundary if I keep hitting the wall.

I also implement the joystick version, same result. But I have to emphasize that it only happens when you try to hit the wall for more than 1 second.

[Jeff]

Do you still have this issue if you export (http://help.sketchup.com/en/article/140409) the model with the Export Two-Sided Faces option enabled?

[Qiliang He]

Oh, you are a genius. Thanks!