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<math.h> functions
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Is there any way that I can get the sin(), cos() and tan() functions to return an angle? For example, like when you press 2nd then sin on a calculator. Or should I use different functions?
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Join Date: Jul 2005
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Hard time converting radians to angles?
Klatu Barada Nikto
I am new at this. I am trying to make a little top down 2D game where the character rotates towards the mouse. Got any ideas?
So, I think the previous post was alluding to the fact that:
degrees = radians * 180/pi
Hope that helps?
degrees = radians * 180/pi
Hope that helps?
Last edited by bnekolny; Jul 9th, 2009 at 8:09 pm.
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i belive what you are looking to use are the acos(), asin(), and atan() functions.
for instance: tan() returns the ratio of the sides (y/x or opposite/adjacent) when given the angle in radians as the argument .... whereas atan() returns the angle in radians, when given the ratio of the sides ( y/x or opposite/adjacent) as the argument.
('arctan' -- called 'atan' here -- is the inverse function of 'tan'. it is the one that is actually used when you use the 2nd key on your calculator in conjunction with 'tan'. And as mentioned, angles are in radians. to convert to degrees, muliply the radian value by 180/pi)
[edit] the functions are called as "atan"... not "arctan" as i originally typed. sorry[/edit]
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for instance: tan() returns the ratio of the sides (y/x or opposite/adjacent) when given the angle in radians as the argument .... whereas atan() returns the angle in radians, when given the ratio of the sides ( y/x or opposite/adjacent) as the argument.
('arctan' -- called 'atan' here -- is the inverse function of 'tan'. it is the one that is actually used when you use the 2nd key on your calculator in conjunction with 'tan'. And as mentioned, angles are in radians. to convert to degrees, muliply the radian value by 180/pi)
[edit] the functions are called as "atan"... not "arctan" as i originally typed. sorry[/edit]
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Last edited by jephthah; Jul 9th, 2009 at 8:40 pm.
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sorry, i made a typing mistake .. in C/C++ the functions are actually called as "asin()", "acos()" and "atan()"
follow the links i provided above and you'll see the prototypes.
the header is still the same <math.h> (aka <cmath>)
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follow the links i provided above and you'll see the prototypes.
the header is still the same <math.h> (aka <cmath>)
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Last edited by jephthah; Jul 9th, 2009 at 8:45 pm.
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