Trigonometry

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Trigonometry #77613 06/13/06 19:14 06/13/06 19:14
Joined: Apr 2006 Posts: 265 V vartan_s OP Member
vartan_s OP Member V Joined: Apr 2006 Posts: 265	I'm having a little problem with my trigonometry. I can use it to find lengths, but how do I give it as a reciprocal so I can work out angles? I already searched the site for this.

Re: Trigonometry [Re: vartan_s] #77614 06/13/06 19:22 06/13/06 19:22
Joined: Jul 2002 Posts: 4,436 Germany, Luebeck Xarthor Expert
Xarthor Expert Joined: Jul 2002 Posts: 4,436 Germany, Luebeck	You mean you have the length of two sides of a triangle and now you want a certain angle in this triangle? (where one has 90°) Please explain your problem more precisly.

Re: Trigonometry [Re: Xarthor] #77615 06/13/06 20:21 06/13/06 20:21
Joined: May 2005 Posts: 83 Texas mocosgames Junior Member
mocosgames Junior Member Joined: May 2005 Posts: 83 Texas	You would use atan or asin or acos for example fatan(adjacent,opposite) would give you tha angle of x in a right triangle

Re: Trigonometry [Re: Xarthor] #77616 06/14/06 18:43 06/14/06 18:43
Joined: Apr 2006 Posts: 265 V vartan_s OP Member
vartan_s OP Member V Joined: Apr 2006 Posts: 265	Quote: You mean you have the length of two sides of a triangle and now you want a certain angle in this triangle? (where one has 90°) Please explain your problem more precisly. Yes that's the problem. So do I use fatan or atan? Or is it different?

Re: Trigonometry [Re: vartan_s] #77617 06/14/06 19:47 06/14/06 19:47
Joined: Feb 2003 Posts: 6,818 Minot, North Dakota, USA ulillillia Senior Expert
ulillillia Senior Expert Joined: Feb 2003 Posts: 6,818 Minot, North Dakota, USA	Quote: I'm having a little problem with my trigonometry. I can use it to find lengths, but how do I give it as a reciprocal so I can work out angles? I already searched the site for this. For a reciprocal, just raise a value to a negative exponent: some_var = pow(some_angle, -1); another_var = pow(some_angle, -0.5); The top one takes the reciprocal of the variable, some_angle and the bottom one takes the square root of some_angle then gives the reciprocal. If some_angle was 4, you'd get 0.25 in the top one and 0.5 in the bottom one. I don't know if this is what you're after. "You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip My 2D game - release on Jun 13th; My tutorials

Re: Trigonometry [Re: ulillillia] #77618 06/15/06 13:50 06/15/06 13:50
Joined: Apr 2006 Posts: 265 V vartan_s OP Member
vartan_s OP Member V Joined: Apr 2006 Posts: 265	Nope. Unfortunately not it. I don't think I've explained well. Say you have an angle x, which you want to find out, and you have the adjacent and opposite sides. Usually you would get the reciprocal of tan and put the opposite side/adjacent side to work out x. I'm asking how you could work this out in gameplay, with functions.

Re: Trigonometry [Re: vartan_s] #77619 06/15/06 14:01 06/15/06 14:01
Joined: Sep 2003 Posts: 4,959 US G Grimber Expert
Grimber Expert G Joined: Sep 2003 Posts: 4,959 US	angle = atan(opposite/adjacent);