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  Rise / Run  (Read 1998 times)
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Offline jynx

Junior Newbie





« Posted 2011-08-10 19:33:14 »

Hello, I'm having troubles figuring out how to convert my direction (in degrees) to rise over run for my player's x and y variables and still be able to limit the speed of the player.
Offline Mads

JGO Ninja


Medals: 26
Projects: 3
Exp: 6 years


One for all!


« Reply #1 - Posted 2011-08-10 19:55:58 »

Math.atan2 should do the job Smiley

EDIT:
I'm lazy, and my reply suggests it aswell. I'm going to give you more than just that little hint: The source code I used to calculate the velocities of a projectile shot form the player.
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Shot shot = new Shot(player.getX(), player.getY(),
         player.getRotation());
shot.setXV(shot.getXV()
         + Math.cos(Math.toRadians(player.getRotation()))
         * GameMain.shotSpeed + player.getXVelocity());
shot.setYV(shot.getYV()
         + Math.sin(Math.toRadians(player.getRotation()))
         * GameMain.shotSpeed + player.getYVelocity());

It should be pretty selfexplainatory. The angle was entered in radians, and is normally in degress for my convinience. Smiley

Cheers!  Smiley

Offline Eli Delventhal

JGO Kernel


Medals: 42
Projects: 11
Exp: 10 years


Game Engineer


« Reply #2 - Posted 2011-08-10 20:23:13 »

cos = X, sin = Y.

See my work:
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Offline jynx

Junior Newbie





« Reply #3 - Posted 2011-08-10 20:32:12 »

Yep, thanks a bunch guys, works perfectly!
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