Understanding Collision Detection Algorithms in Game Development

AABB Collision Detection

Axis-Aligned Bounding Box collision is efficient:

• Rectangle overlap testing
• Simple arithmetic calculations
• Fast broad-phase detection
• Perfect for grid-based games

Circle Collision

Circle-to-circle uses distance formula:

• Compare distance vs combined radii
• Efficient for many game types
• Works well for projectiles

SAT (Separating Axis Theorem)

Handles complex polygon collisions:

• Project shapes onto axes
• Find separating axis
• Accurate but computationally expensive
• Used for precise collision

Spatial Partitioning

Optimize with grid or quadtrees:

• Reduce collision check pairs
• Divide space into regions
• Only test nearby objects

Conclusion

Choose collision algorithms based on performance needs: AABB for speed, SAT for accuracy, spatial partitioning for optimization.