Real-Time Physics Simulation Forum

No problem

And yes, collision in general worked fine in the tests I made.

The bug was already reported almost a year ago here:
http://code.google.com/p/bullet/issues/detail?id=636

It seems there is a need to support the old behaviour by having a flag before it's integrated on master.

I have tested the code before and it did work, however sometimes there were issues when the shape scaled down due to caching of contact points (if something was on top of the shape and it scaled down, it would remain there "floating" until it moved or something), however clearing the cache...

You should cast a ray, otherwise you'll probably get missing bullets because of tuneling.

http://bulletphysics.org/mediawiki-1.5. ... ng_RayTest

Looks like a wrong local inertia is set.

Are you using cylinders alone or using compound shapes? I get similar results if using compound shapes and the shapes aren't centered.

Hi Considerations: I have a rigid body box (let's call it Player) sitting on a static btBvhTriangleMeshShape (let's call it Platform), and I'm using lateral friction to slide the Player over the Platform. Works pretty good. Both the Player and the Platform has a friction of "0.5". I am not...

It's fixed.

I cannot build the extras though:
"BulletXmlWorldImporter/btBulletXmlWorldImporter.cpp:589:16: error: ‘intptr_t’ was not declared in this scope"

I think "cp.m_lateralFrictionInitialized = false;" on line 835, file btSequetialImpulseConstraintSolver.cpp is not supposed to be there?

Works great.

However it appears in some cases the friction info is getting cached somehow and the object gets stuck, not responding to variations in lateral friction. Clearing the relevant overlapping pairs within updateAction() solves it, though it seems more like a workaround...

Hello

I have a box, and would like one of it's faces to act like a tank's continuous track so that if it falls on the ground with that face, it will begin to slide in a direction.

How could I implement this?

Thanks in advance

Perhaps you have some friction going on between the player and the wall? Or maybe the force you're pressing the wall makes it somehow penetrate it in a way that the generated impulses will make your Y velocity zero... I still believe you'd be better of using a sphere as a wheel below the player, els...

If properly implemented, a dynamic body doesn't seem like a bad idea at all to me. I am currently developing a project (2D platformer) and I'm using a dynamic body because of all the benefits that come with it such as walking on moving platforms, mostly automatic collision handling and so on. Here's...

Usually btMultiSphereShape's setLocalScaling appears to scale only the spheres on their own origin, this patch I created appears to fix the problem: Index: src/BulletCollision/CollisionShapes/btMultiSphereShape.cpp =================================================================== --- src/BulletCol...