Search found 11 matches

by Mark97
Sun Oct 10, 2021 6:00 pm
Forum: PyBullet Support and Feedback
Topic: make visible only part of object
Replies: 0
Views: 180

make visible only part of object

Hello,

How can one visualize only a part of an object? Let's say that I want to 'cut' an object in two based on the x-axis or overlap with another object?
Or could we do a 2D projection of a certain surface?

Is that possible?

Thanks!
Mark
by Mark97
Mon Oct 04, 2021 9:18 am
Forum: PyBullet Support and Feedback
Topic: How to create slider in PyBullet
Replies: 0
Views: 168

How to create slider in PyBullet

How can one create a slider in PyBullet?

In other words: how to create an object with only one degree of freedom? Let's say that I want my object to freely move in the x-direction, but is restricted in the y- and z-direction. It this possible in PyBullet?
by Mark97
Sat Oct 02, 2021 5:37 pm
Forum: General Bullet Physics Support and Feedback
Topic: J impulse is wrong in all Physics Engines
Replies: 3
Views: 1432

Re: J impulse is wrong in all Physics Engines

Have you considered WORLD_FRAME, instead of LINK_FRAME?

The link follows the object, resulting in practically no displacement. The world is a static, resulting in a deformation over time.

Hope that helps.
by Mark97
Sat Oct 02, 2021 10:10 am
Forum: General Bullet Physics Support and Feedback
Topic: 30x perfomance difference between PyBullet and Bullet3
Replies: 0
Views: 229

30x perfomance difference between PyBullet and Bullet3

I've just ran the benchmark of 3000 cubes in Bullet3 (using Visual Studio), and found a total step time of about 7 ms. (4 threads) I've copied the C++ code and translated it into Python code, and ran 3000 standard cubes in PyBullet (using Anaconda Navigator, Notebook), and found a total step time of...
by Mark97
Fri Oct 01, 2021 7:37 pm
Forum: PyBullet Support and Feedback
Topic: How to build PyBullet with CMake
Replies: 0
Views: 201

How to build PyBullet with CMake

Hello, I've tried to build PyBullet (tiny differentiable simulator) using cmake. However, I got the error message that 'files might be invalid'. Also, the quickstart guide states that I should rename 'pybullet_vs2010.dll to pybullet.pyd'. However, I could not find this file. If anyone reads this and...
by Mark97
Fri Oct 01, 2021 7:01 pm
Forum: Release Announcements
Topic: PyBullet and Bullet 2.89 with FEM deformables, PyBullet deep_mimic and Laikago
Replies: 1
Views: 12449

Re: PyBullet and Bullet 2.89 with FEM deformables, PyBullet deep_mimic and Laikago

do FEM deformables have options for complex contact models, like nonlinear stiffness, and permanent deformation / viscosity?
by Mark97
Fri Oct 01, 2021 4:23 pm
Forum: PyBullet Support and Feedback
Topic: PyBullet cannot load urdf file
Replies: 0
Views: 181

PyBullet cannot load urdf file

When I try to run an example file, like the one below, I keep getting the error that the bunny won't load. https://github.com/bulletphysics/bullet3/blob/master/examples/pybullet/examples/load_soft_body.py The plane, samurai, cube, table, and sphere2 can all be imported. But objects like the bunny ca...
by Mark97
Fri Oct 01, 2021 9:55 am
Forum: General Bullet Physics Support and Feedback
Topic: Cannot load URDF file (for soft objects)
Replies: 1
Views: 166

Cannot load URDF file (for soft objects)

When I try to run an example file, like the one below, I keep getting the error that the bunny won't load. https://github.com/bulletphysics/bullet3/blob/master/examples/pybullet/examples/load_soft_body.py The plane, samurai, cube, table, and sphere2 can all be imported. But objects like the bunny ca...
by Mark97
Tue Sep 28, 2021 3:20 pm
Forum: General Bullet Physics Support and Feedback
Topic: Multithreaded simulation in Bullet3
Replies: 1
Views: 236

Multithreaded simulation in Bullet3

Hello, I'm simulating a few of the examples in Bullet Physics ExampleBrowers using OpenGL3+ (from Visual Studio). However, the 'deformable Body' simulations are slow, and only 1 thread of my cpu is being used. I have 8 threads in total, and would like to speed up things. Is this possible? If so, how...
by Mark97
Tue Sep 28, 2021 9:41 am
Forum: General Bullet Physics Support and Feedback
Topic: Nonlinear contact model
Replies: 0
Views: 226

Nonlinear contact model

Hello, Is it possible for PyBullet to have a nonlinear contact model? I'm trying to use Burgers model, with lots of springs and dampers, to model viscous material behaviour. Is this option available, or should I implement it in the source code? In case of the latter, where can I best do this? Thanks...
by Mark97
Mon Sep 27, 2021 7:33 am
Forum: General Bullet Physics Support and Feedback
Topic: Use PyBullet in Visual Studio - Windows 10
Replies: 0
Views: 216

Use PyBullet in Visual Studio - Windows 10

Hello, I've just installed PyBullet in Jupiter Notebook, and it works fine. However, my goal is to modify the source files / add files for specific scientific research purposes. Therefore I would like to work in Visual Studio. As far as I know, I have the most recent version of everything. I've down...