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DarkBASIC Professional Discussion / calculate angle

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bitJericho
23
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Joined: 9th Oct 2002
Location: United States
Posted: 27th Aug 2004 13:58 Edited at: 27th Aug 2004 14:00
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I want to calculate an angle in which the properties I know of is the:

x1, y1
x2, y2

and the angle is calcualated from the horizontal..

so here's an example..




I'd be happy to answer any questions if you don't understand
if anyone knows the solution to the angle of ? from the horizontal axis, I'd be very grateful if you share


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Codger
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Posted: 27th Aug 2004 14:50
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1/. Learn Trig
2/. object angle x ()

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Ric
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Location: object position x
Posted: 27th Aug 2004 15:23
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If you haven't learned the basics of trigonometry yet - it's really not hard, give it a go! The answer, by the way, is angle = arctan (y/x) where arctan is 'atan' in DBPro, and y and x are the distances found from y2-y1 and x2-x1.


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IanM
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Posted: 27th Aug 2004 22:22
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To find the angle from one point to another you use the following command

Angle# = atanfull(x2-x1, y2-y1)

That finds the angle from 'north' that point 2 is from point 1.

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bitJericho
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Posted: 28th Aug 2004 01:00
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heh, thanks guys.. I've always had problems trying to transfer my education in trig into programming^_^ Which wasn't very good education in the first place

Perhaps I should see if my library has any trig books^_^

But anyway, that answered my questions


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JerBil
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Location: Somewhere along the Z axis...
Posted: 28th Aug 2004 02:39 Edited at: 28th Aug 2004 02:42
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This is not exactly what you wanted, but there's some
good basic info on the site below, although sometimes the
site is down...

http://www.geocities.com/siliconvalley/campus/9449/physics.htm#5


-JerBil
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