Spheres wild drifting

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ihmc3jn09hk
Posts: 4
Joined: Thu Nov 26, 2015 2:33 pm

Spheres wild drifting

Post by ihmc3jn09hk »

Hi all,
I am testing the RigidBody dynamic of Bullet3 especially in the OpenCL module. A simple sphere scene with ~12k spheres sampled on a mesh and a plane as ground.
Capture.PNG
Capture.PNG (167.17 KiB) Viewed 2741 times
The simulation is only ~12k spheres free falling with gravity -980 m/s. :P (Yah, my scene is in 0.01 metric-scale.) Broadphase, narrowphase and pipeline setups are all identical to the shipped example in version 2.87. There are some wild driftings on batches of spheres as shown in the attached video.
Video.7z
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This happens when I was using the GPU (1080Ti) to do the simulation. When I use the CPU (5930k) with the same setup in Bullet3's OpenCL implementation.
Anyone knows the reason? (Would it be my GPU is naughty to trick me up :?: :mrgreen: :!: )
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