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Miloslav Ciz 2022-11-01 21:41:16 +01:00
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# Collision
Collision happens when two or more things want to occupy the same spot. This situation usually needs to be addressed somehow; then we talk about **collision resolution**. In [programming](programming.md) there are different types of collisions, for example:
Collision, sometimes also *conflict*, happens when two or more things want to occupy the same spot. This situation usually needs to be addressed somehow; then we talk about **collision resolution**. In [programming](programming.md) there are different types of collisions, for example:
- **[hash](hash.md) collision**: When two items produce the same hash, they will map to the same index in a [hash table](hash_table.md). Typical solution is to have a [list](list.md) at each table index so that multiple items can fit there.
- **collision of bodies in a [physics engine](physics_engine.md)**: See [collision_detection](collision_detection.md). These collision are resolved by separating the bodies and updating their velocities so that they "bounce off" as in [real life](irl.md).