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Newcomers DBPro Corner / Calculating Angles from x,y co-ordinates

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Scraggle
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Joined: 10th Jul 2003
Location: Yorkshire
Posted: 28th Oct 2003 21:25
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Hi!

I was wondering if anyone could tell me a way to calculate angles from x,y co-ordinates?

For example: If obj was moving 10 places along the x axis and zero on the Y axis then obj would be travelling at 90 degrees. Similarly if obj was moving 10 places along the x axis and minus 10 along the y axis then obj would be travelling at 45 degrees.

That's easy but is there a way to calculate these angles and any others just from the amount of movement along each axis?

Thank you

P.S. I am, of course, talking about 2D only.
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spooky
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Location: United Kingdom
Posted: 28th Oct 2003 21:43
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Found this on my drive, author unknown



If your mansion house needs haunting, just call Rentaghost!
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Scraggle
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Posted: 28th Oct 2003 21:48
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Thanks spooky

ATANFULL might do the trick I think.

Thanks
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Magpie
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Posted: 28th Oct 2003 21:56
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AHATFUL Of Ghosts
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Magpie
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Posted: 28th Oct 2003 21:58
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Can you do it backwards? Like find the x and y stuff from the angle value itself? I'm working on a breakout game called Blockout 2004.
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BatVink
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Posted: 28th Oct 2003 22:01
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Quote: "AHATFUL Of Ghosts"


Is that along the lines of SOHCAHTOA? If so, what does it stand for?

Sin=Opp/Hypoteneuse
Cos=Adj/Hypoteneuse
Tan=Opp/Adj

BatVink (formerly StevieVee)
http://facepaint.me.uk/catalog/default.php
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Magpie
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Posted: 28th Oct 2003 22:31
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I know SOHCAHTOA but I think ATANFULL is something different.
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Scraggle
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Posted: 28th Oct 2003 22:49
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@Helix

NEWXVALUE and NEWYVALUE might be what your looking for.
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Northern Fist
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Posted: 29th Oct 2003 17:44
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Scraggle is correct, look into those keywords - they will make your like easier...

"Power, precision, and don't forget about speed. If you practice everyday with these things in mind... you begin to develope A FIGHTING MODE." - Fist of Legend (Jet Li)
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