Collision detection

[pkulev]

• add to entities field collider with some type and parameters
• add common mechanism for checking collisions
• provide set of colliders for different shapes (Sphere, Box, Custom shape)

class ERocketLauncher(Weapon):
    super(ERocketLauncher, self).__init__(**CONFIG[self.type])
    self._collider = SphereCollider(pos=Vec3(0, 0), radius=1)
    ...

• insert somewhere to right place collision detection routine for every appropriate object (maybe in event handlers)

  * add code for actions on collision

Further collision detection code will be moved into engine and colliders will turn into components for lightweight entities.

Collision detection tightly coupled with event system and object system.

[alex-eg]

>    self._collider = SphereCollider(pos=Vec3(0, 0), radius=1)

And right after this, on next update the object should already check for collisions with other objects, right? @pkulev

[pkulev]

Yes. All collisions should check on events stage of iteration, on update stage game objects should know that collision detected and where.

[alex-eg]

What is event stage? I'm afraid we don't quite have it.

[pkulev]

Please consider with State class.

Application calls 3 functions of current state.

events()
update()
render()