Tweaking some settings to get the cups to behave nicely #27
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I had set cube collision shapes on the cups to work around issues with the cylinder shapes. After getting some feedback experimented with changing settings.
First, you can't set the margin below 0.01 in the IDE. That is 1cm for a cup that is 10 cm high. Way to much.
But you can change it programmatically so I've set it to 0.001.
The problem we now get is that bullet has great problems handling this properly unless you up the physics update rate. They recommend going as high as 300 updates per second.
Because we want the physics update rate to be in sync with the headset update rate I've added a factor to our init script that defaults setting the update rate to 2x the headset rate (160 updates per second on a Rift S). That already makes the simulation of our cups pretty stable.
Going higher works even better.