# Mathematics (curves)

**URL:** <https://forum.kirupa.com/t/mathematics-curves/114679>\
**Category:** Uncategorized\
**Created:** [June 30, 2004, 4:53pm UTC](https://forum.kirupa.com/t/mathematics-curves/114679 "2004-06-30T16:53:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cooleyo](https://avatars.discourse-cdn.com/v4/letter/c/8dc957/32.png) [@cooleyo](https://forum.kirupa.com/u/cooleyo)\
**Post date:** [June 30, 2004, 4:53pm UTC](https://forum.kirupa.com/t/mathematics-curves/114679/1 "2004-06-30T16:53:31Z")

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Hi there! I can’t pinpoint or make up a set of calculus to determine the right formula which describes a curve that goes through 3 specific points…

Do I express myself correctly? I’ll try to say it with a more hand-on approach. I have a spaceship which can move vertically, located to the left. The enemies, obviously, arrive from the right. Now, when i click anywhere on the scene, I want a missile/plasma orb/projectile to be shot from the spaceship, but doing more than going in a straight line: imagine 3 points, one at the spaceship, one in front (therefore to the right) of the spaceship (5/10 units in front) and the third at the click location. How do I determine the formula of the curve that goes along these three points?