Shapes Can't Pass Through Rings

[katlandreth]

While the center of the ring is transparent, its behavior is more like a disk than a ring.

Unexpected Behavior:

• I place ring on the canvas, and turn it on its side
• Place some spheres inside the ring hoping to corral them in place
• Spheres end up sitting on top of an invisible plane instead of inside the ring
• Other shapes can't pass through rings

Expected Behavior:

• The center of the ring should behave as empty space
• Other shapes should be able to pass into and through the center of the ring

Video: https://www.dropbox.com/s/hliuztcyy0r6qi6/ShapesCantPassThroughRing.mov?dl=0 this shows a ring sitting on top of a wedge instead of having the wedge pass through the ring. You can also see some spheres and a pyramid sitting on top of a ring, seemingly floating in space.

[katlandreth]

Same thing is happening with the center hole of the gear.

[katlandreth]

Maybe related-
I stacked this pyramid on top of a cube. It's not snapped. There's a small gap between the pyramid and the cube. Problem with collision box maybe?

[kmcurry]

Concave collision not yet supported. In progress soon.

[kmcurry]

It turns out that concave surfaces are problem for every physics engine out there. We might be able to add it at some point in the future. We'll take this issue off the Path to Sales milestone. We'll also remove Ring, Tube and Elbow for now and possibly add more convex Parts.