# Arcing projectiles?

**URL:** <https://forum.kirupa.com/t/arcing-projectiles/291608>\
**Category:** Uncategorized\
**Created:** [July 2, 2009, 7:43am UTC](https://forum.kirupa.com/t/arcing-projectiles/291608 "2009-07-02T07:43:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![flyingmonkey456](https://avatars.discourse-cdn.com/v4/letter/f/e47774/32.png) [@flyingmonkey456](https://forum.kirupa.com/u/flyingmonkey456)\
**Post date:** [July 2, 2009, 7:43am UTC](https://forum.kirupa.com/t/arcing-projectiles/291608/1 "2009-07-02T07:43:34Z")

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i’m making a turret defense game (the kind with one aimable turret) and one of the weapons will be a bomb. i think i know part of the formula for making it move in an arc, but i need to know the whole thing :). it has to start at the turret (duh) and the top of the arc has to be the mouse’s position when it was fired. if i use \_xmouse as the y axis (by subtracting it from the \_x) i think i should be able to use the simple y=mx+b equation. b would be the \_y of the turret, x and y are obvious, and m would be somehow related to x to make y increase in an arc. not sure how to figure that part out. a simple link to somewhere that the formula is explained would be helpful, i’ve searched and can’t find it.