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Topic: cartesian to polar / polar to cartesian (Read 836 times) |
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Dimitre
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cartesian to polar / polar to cartesian
« on: May 19th, 2003, 4:34pm » |
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I think it could be nice if processing have commands to make the conversion of coorinates system.
I use a tool called filtermeister ( www.filtermeister.com - photoshop plugins development) to test computer graphics, like in processing.
There are four commands that helps in that kind of conversion. here are they:
c2d(x,y); - converts the cartesian to direction (angle)
c2m(x,y); - converts the cartesian to magnitude (radius)
r2x(d,m); - converts polar to cartesian X
r2y(d,m); - converts polar to cartesian Y
mmm, it sounds like a op art machine 
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fry
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Re: cartesian to polar / polar to cartesian
« Reply #1 on: May 20th, 2003, 7:57pm » |
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as someone who has made use of such functions, i could probably be convinced that they should be in the api.. i'll put them on the list and see what happens.
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| « Last Edit: May 20th, 2003, 7:57pm by fry » |
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Dimitre
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Re: cartesian to polar / polar to cartesian
« Reply #2 on: May 23rd, 2003, 11:15pm » |
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I don't know if is the best way to do, but I think it worked:
Code:// cartesian to angle
float c2a (float x, float y){
float angle = (atan2(y,x) * 180/PI);
return angle;
}
// cartesian to magnitude (radius)
float c2m (float x, float y){
float magnitude = (sqrt(sq(x) + sq(y)));
return magnitude;
}
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I started with functions returning an Int, but later I needed float for more resolution.
it is running at http://dmtr.org/generative/?id=46
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| « Last Edit: May 23rd, 2003, 11:16pm by Dimitre » |
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fry
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Re: cartesian to polar / polar to cartesian
« Reply #3 on: Jun 24th, 2003, 9:14pm » |
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cool, thanks.. i was thinking of the 3D case but the 2D makes even more sense. 
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