What happens when a dynamic and static body collide?
Even without gravity, having a dynamic body collide at the same time with a static body and another dynamic body causes problems. Since the velocity is swapped, it all depends on the order of collision. If the static body is collided last, the body will stop moving. If the dynamic one is, the body will move again.
How do you resolve a collision in physics?
In my 2D physics engine, I can detect AABB vs AABB collisions, and resolve them by finding the shortest penetration vector and adding it to the AABB’s position. Doing this “pushes” the first AABB outside of the second AABB, but doesn’t deal with velocity/acceleration changes at all.
What happens when a collision with a force is too big?
Eventually, the velocity will become too big and the collision won’t be detected (the dynamic AABB will fall through the static one). What should really happen is an acceleration force that is going in the opposite direction as gravity should cancel gravity out. (This is called the normal contact force).
When to handle a collision of two bodies?
It is sufficient to handle the first two bodies that collide, then handle any following collisions using the new velocities from the previous collision resolutions. This is a good reason to keep your physics time steps as small as possible and handle collisions before any penetrations occur.
Do you need collision on a static mesh?
Chances are, whatever you have your Static Mesh do in your level, you do not want to have the player able to walk or shoot through the mesh. That is where setting up collision on your Static Mesh is useful. You may already have a level and Static Meshes of your own to work with. If you do, you can skip this step.
Can you model a collision between idealized rigid bodies?
When modelling a collision between idealized rigid bodies, it is impractical to simulate the compression and expansion phases of the body geometry over the collision time interval. However, by assuming that a force , the notion of instantaneous impulses may be introduced to simulate an instantaneous change in velocity after a collision.