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There are many types of forces that can be used. More are easy to add as well. The three main types are environmental forces, N-body forces, and simple forces.
Environmental forces are added to a `ctWorld' and act on all bodies in that world, for example gravity, air resistance, etc.
ctGravityF* gf = new ctGravityF(9.81 / M_PER_WORLDUNIT); phyz_world.add_enviro_force(gf); |
N-body forces are forces that act between multiple bodies, for example springs and planetary gravity.
ctVector3 spring_attachment_point1(0, 1, 0); ctSpringF* sf = new ctSpringF( rb1, spring_attachment_point1, rb2, spring_attachment_point2); sf->set_magnitude(200.0 / M_PER_WORLDUNIT); // Need to add force to each body it affects. rb1->add_force(sf); rb2->add_force(sf); |
Specify the second body as `NULL' to indicate that end is attached to the world and is therefore immovable.
Simple forces would be something like a rocket engine or other kind of force that only acts on one body.