Real-Time Physics Simulation Forum

Hmm... I actually don't know what the coordinates would be, because i'm reading them from file (a previously saved mesh). And how to change the center of mass of a shape? A rigid body has a function named setCenterOfMassTransform() but i didn't help. Perhaps because it's not a shape's function. I co...

Hi! It seems i just can't get it right. Here is a snippet: btConvexHullShape *shape = new btConvexHullShape(&vertex->x, vertexCount, 12); //doesn't work //btBoxShape *shape = new btBoxShape(btVector3(5.0f, 5.0f, 5.0f)); //works as expected btVector3 localInertia(0.0f, 0.0f, 0.0f); shape->calcula...

Hi! Can someone point me in direction on what can be the cause of this assertion? btConvexShape.cpp on line 108 in convexHullSupport() function: btAssert(ptIndex >= 0); ptIndex is "-1" I just don't know what i did wrong, because i don't know what can lead to this error. I'm not doing any m...

strange.. is your btMotionState implementation right? I mean, what happens if you take out everything apart from the mast and apply a force - does it move as you expect? Something must be wrong if an off axis impulse doesn't make it rotate at all... Here is how my class looks like (taken from previ...

Hi! It seems that i can't delete collision shapes when exiting my app. It crashes with "Access violation reading location 0xcdcdcdc9" in btAlignedAllocator.cpp on line 198: ... if (ptr) { real = *((void **)(ptr)-1); sFreeFunc(real); } ... ptr - is 0xcdcdcdcd Call stack: > ShipViewer.dll!bt...

Any other ideas about this?

Yeap. I tried: applyImpulse with different impulse and rel_Pos settings; applyTorque/applyTorqueImpulse with different torque settings; And many other things, but it's just not working like it should. Have you seen how other masts behaive on video? It's strange! And with different settings of impuls...

Thanks for an advice. I guess i'll ask there too.

Tested with what you proposed. No luck, but there is a difference.
The mast falls like before (sliding), but when touches the ground, it starts to..... perhaps a video will better explain.
http://www.youtube.com/watch?v=Y9yxjOCTJgY

Anyone?

Thank you! I guess i missed that part in tutorials. I will test it and report back.

P.S. Yes i have tried with cylinders. Same thing.

Hi! What is the best way to check for collisions of many (say more then 100) projectiles (simple spheres)? And ofcource respond with special effects, health decrease, etc. Projectiles should not bounce back or anything like that. Just explode on hit. I suppose setting CF_NO_CONTACT_RESPONSE flag is ...

Sorry... forgot about it. BreakableMast::BreakableMast(Node *node, const float *vertices, const unsigned long vertexCount): mastNode(node), convexShape(vertices, vertexCount, 12), rigidBody(1.0f, this, &convexShape) { convexShape.calculateLocalInertia(1.0f, btVector3(0.0f, 0.0f, 0.0f)); TheBulle...

Perhaps this is where i made mistakes. Here is my class: class BreakableMast: public btMotionState { private: Node *mastNode; btConvexHullShape convexShape; btRigidBody rigidBody; void setWorldTransform(const btTransform &worldTrans) { Transform4D transform; worldTrans.getOpenGLMatrix(static_cas...

Yes, an impulse to the top of the mast should certainly give it some rotation. How are you calculating the relpos value? I got caught out by assuming it would be in object local coordinates, but it's actually in world space. That's strange. I sure read from the forum that they are in local space an...