Forums » Help » How much impact do collision checks have on performance?

I always figured setting "type", "checkAgainst", and "collide" create recurring processes while the entity is alive - is this right or am I mistaken? And if this is the case, would there be any benefit in setting everything to none/never until these checks are actually required?

Eg I have various kinds of enemy entities that do not need to have a type or checkAgainst setting until a bullet is spawned. Is it worth me setting them to NONE and then setting them again when the player shoots?

You only save time if you set all three to no collision:

entity.type == ig.Entity.TYPE.NONE &&
entity.checkAgainst == ig.Entity.TYPE.NONE &&
entity.collides == ig.Entity.COLLIDES.NEVER

Otherwise, checkAgainst & type govern whether or not check() gets called, and collides dictates what happens during collision resolution.

Thanks, quidmonkey, that helps. I've already been setting as much as possible to none/never so I can set all three to no collision in at least several entities.