Real-Time Physics Simulation Forum

The shapes involved are : Sphere, Cone, Cylinder, and will also probably involve convex and combined shape in future. The collision happens against a static triangle mesh. Basically a "cutter" is dropped on the surface of the object to be milled. So, only first hit is important for this co...

Thanks for your reply. I am not planning to switch to PhysX, for these reasons: I develop in blender, and want to keep my development synced with it's current version. Also, I am mainly python developer, so from your point of view, an amateur ;) I am big fan of open source and bullet too, so I won't...

Hello, still got no answer, after several months. Am I asking wrong question, or in wrong forum?
I would be willing to pay for a solution to this...

Hello, I am still trying to find any advice on how to optimize sweep test performance. Could HACD potentially be used to optimize sweep tests, even when I need best precission possible? Is that possible also for non-manifold meshes? Sorry for asking again, but I just didn't find any solution to this...

Not taking into account the emotional stuff in this thread, I can mention that I struggle with the sweep test performance in Bullet still, and don't know how to optimize it. I did test in Blender(bullet) vs Unity(PhysX), testing a sphere against a highpoly mesh(unity supports max 65k meshes). Unity ...

Hello,
I am still struggling with this, anybody has an idea about how the performance could become better with the way it is currently implemented in bullet?
thanks..

Thanks for you reply. My use case is : I am testing the same convex shape(so far only sphere, cone, cylinder) many times against a single or maximally several complex not-moving triangle mesh(es)(concave). I am interested only in the first hit. The mesh can have up to hunderds of thousands of triang...

Hello, I've implemented a convex sweep test function(inside blender 3d ) and want to improve the performance of it.
Is it possible to use multithreading when testing collision against the same meshes somehow? if yes, how?
thanks

I still didn't get any answer here :) and allraedy have a different question: Can the convex sweep test be faster when searching just for first hit instead of all hits? I didn't find out if and how. but - I realized an interesting thing. Convex sweep against a btGimpactMeshShape is actually a bit fa...

I decided to post the code, maybe someone can help? I am thinking if the fact that I have to create a convex shape from the collision shape can be a problem? I don't know how not to do this. I will be glad for any help... void RB_body_convex_sweep_test(rbDynamicsWorld *world, rbRigidBody *object, co...

I thought it's allready there...?
http://www.youtube.com/user/rtrius?feature=watch

Good news is I got it working inside blender. Bad news is, for my purpose the performance is not stellar and I am sometimes getting inprecise results. My use case is - I am developing a CAM addon, where I need to check a convex primitive(Sphere, Cone, Cylinder, Capsule), against a (sometimes very co...

Hello, I am curious if the sweep test can be done for many positions with an efficient way. I am using blender to create paths for a cnc machine with a new addon for bleder: http://blendercam.blogspot.cz/ , and I would love to use bullet for collision. It would be mainly testing the same primitive a...

on erwins request, the videos have been youtubed, see them here: http://www.youtube.com/watch?v=7CzsJpL0Fss http://www.youtube.com/watch?v=f0tV66XvA2U (for the other videos, click on my profile, this is just one of last volumic tests) also uploading an attachment here, which is the zipped crackler a...

Hello, although this isn't directly involving bullet implementation by myself, I did some scripts in Blender which use Bullet heavily for the simulation part. Heaper is a very simple script for making big natural looking heaps. Crackme are currently actually 2 scripts, where 1 is for generating brok...