Direction formula?

Member

Posts: 43
Joined: 2009.02

Post: #1

Nov 11, 2009 — 11:11 PM

I was wondering if anyone has any information on how to calculate the angle at which to rotate an object based on an x,y set of information?
Ie:
A circle has a point on it that I want to face the mouse. I have the x,y of the circle, and the x,y of the mouse. How can I figure the angle at which to rotate the circle?

Skorche

Sage

Posts: 1,478
Joined: 2002.09

Post: #2

Nov 11, 2009 — 11:22 PM

Code:

atan2(mousey - circley, mousex - circlex)

Result is in Radians. Multiply by 180/PI to convert to degres.

Scott Lembcke - Howling Moon Software
Author of Chipmunk Physics - A fast and simple rigid body physics library in C.

TimMcD

Member

Posts: 43
Joined: 2009.02

Post: #3

Nov 11, 2009 — 11:42 PM

Thank you very much!

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