Real-Time Physics Simulation Forum

Any reason why activate() isn't called by Bullet when applying forces/impulse?

Hey all!

I have a box that has it's origin in at the lower front left corner, how can I create a btBoxShape that will wrap this? Did I miss some function?

Thanks!

So I ended up doing this, which works really well. Comments are welcome! float const player_rotation_speed = configuration.get("player_rotation_speed", M_PI*2.0f) * dt; auto const player_rotation = self.get_rotation(); float const player_acceleration = configuration.get("player_accele...

If so, how can I apply a force to rotate every object? I should apply it relative to the center of mass I guess?

Can I apply a rotation only force, or do I have to use applyForce and calculate where and how I have to push it to get it to rotate?

When I set CF_NO_CONTACT_RESPONSE as a flag on a btRigidBody, that's all that's necessary to only detect collisions but not act upon them right? //! The body will come into contact, (so it will register that it hit something) but will not actually bounce back or something, just pass through. Like a ...

The objects don't seem to have any contact points when drawn with the debugdrawer. Interesting. The getNumContacts in the manifold is also 0! But why are the objects even "colliding" then? Because they are about to? Long story short, fixed it by checking the number of contacts in the manif...

checkCollideWith also says the bodies are colliding... but they are not.

I have made a small testcase (for me small) and it seems like objects are reported as colliding when checking for collisions like this: void Physics::check_collisions(){ std::vector<std::pair<btCollisionObject const*, btCollisionObject const*>> bullet_objects_colliding; int const manifolds = dynamic...

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So my question is basically if there's some known issue or how I can debug this. Anyone?

I encircled the block that will collide with the sphere at the bottom.

EDIT2: Objects seem to collide when they spawn in each others's AABB EDIT: Turns out it's not the btTriangleMesh! That's fine. :) It's the tiny object that somehow has a huge hitbox the first frame. See my later posts for information and screenshots. Hey guys, I'm creating a btTriangleMesh like this...

Ah yes thanks! That was what I was looking for. How stupid. Thanks man!

I'm doing that now, but I can't get the swinging motion to dissapear. Here's some sample code of what I'm doing now. void Planet::update(float const dt, Player& player, motor::Scene& scene, btDynamicsWorld& physics){ for(auto& city : cities){ for(auto& h : city->get_houses()){ if...