Stephen Gold

TODO: 1. Verify this is the first simulation step. 2. Verify N = 2459

Actually, `N` = 4914. Then `newLeafNodes.size()` = 2597, then 1398, then 773, then 455, then 290, then 203, then 156, ... It eventually gets to 1, but then `buildTreeBottomUp()` gets...

The 2nd time, `adj` is based on the soft body's links, but the body has **zero** links!

Adding links to the body resolves this issue. I'll add an option to the `SoftBodyControl` constructor.

Added at b2cd3339fd0990f334ce63c2896f861fe1cc708e

> @stephengold I've been able to fix this, but I wanted to talk though my solution (mostly because I don't understand why the non-VR version doesn't do the same thing...

Thanks for digging into this. I'm glad you found a suitable workaround. In my mind the real issue is much deeper than physics debug. There seems to be a fundamental...

I've reviewed the changes, and I approve this for integration.

I'd like to integrate this PR. However I can't figure out how to do so using the mechanisms built into GitHub. My plan is to integrate the diffs into a...

I plan to merge this after PR 1748 is integrated.