How do I implement a physics engine in my 2D game using C++?

How do I implement a physics engine in my 2D game using C++?

To implement a physics engine in your 2D game, start by defining the basic physics concepts like gravity, collision detection, and response. You can use libraries like Box2D or create your own from scratch.

What are the key components I need to consider for collision detection?

Key components for collision detection include bounding boxes, circles, and polygons. You can use algorithms like the Separating Axis Theorem (SAT) for more complex shapes.

Can you explain how to handle collisions once they are detected?

Once a collision is detected, you need to resolve it by adjusting the positions of the colliding objects and applying forces to simulate realistic reactions, like bouncing or sliding.

Are there any performance tips for optimizing my physics engine?

Yes! Use spatial partitioning techniques like quad-trees, limit the number of active physics objects, and consider using fixed time steps for updates.