Pause physics while re-positioning nodes

Developer Talk
#1

At a certain point in my game I need to reposition nodes that have rigidbody physics attached to them. When I use SetRotation the physics engine kicks in causes the nodes interact with other components in the scene. I would like to temporarily suspend the physics engine while I reposition the nodes and then turn it back on again. Any suggestions on how to do this?

#2

Very easy. You can disable whole physics world or only certain components.
To disable whole physics world use:

auto* physicsWorld = node_->GetScene()->GetComponent<PhysicsWorld>();    
physicsWorld->SetUpdateEnabled(false);

To disable physics of one object use:

auto* rigidBody = object->GetNode()->GetComponent<RigidBody>();
rigidBody->SetEnabled(false);

To enable it again set ‘true’ in these functions.

3 Likes
#3

Also, you can stop the time.

Scene* scene = node_->GetScene();
scene->SetTimeScale(0.f);
1 Like
#4

Thanks, this is just what I was looking for.

1 Like
#5

Instead of Scene::SetTimeScale(float) you could also use Scene::SetUpdateEnabled(bool).