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1  Game Development / Newbie & Debugging Questions / Re: degrees question on: 2005-08-07 13:49:06
thx i've found this code :
 lijnbreedte is the Xpos of the beginning of the drawed line
 lijnhoogte is the Ypos of the beginning of the drawed line
 Straal is the length of the drawed line

The code :

if (player.getY() <= lijnhoogte && player.getX() >= lijnbreedte){
     graden = (int) (90 - Math.toDegrees(Math.acos((player.getX()- lijnbreedte)/Math.sqrt((Math.pow(player.getX()- lijnbreedte,2)+ Math.pow(player.getY()- lijnhoogte,2))))));
     }
     if (player.getY() > lijnhoogte){
     graden = (int) (90 + Math.toDegrees(Math.acos((player.getX()- lijnbreedte)/Math.sqrt((Math.pow(player.getX()- lijnbreedte,2)+ Math.pow(player.getY()- lijnhoogte,2))))));
     }
     if (player.getY() <= lijnhoogte && player.getX() < lijnbreedte){
     graden = (int) (270+(180-Math.toDegrees(Math.acos((player.getX()- lijnbreedte)/Math.sqrt((Math.pow(player.getX()- lijnbreedte,2)+ Math.pow(player.getY()- lijnhoogte,2)))))));
     }

     g.drawOval(lijnbreedte - straal,lijnhoogte - straal,2*straal,2*straal);
     double hoek = (2*Math.PI)/360*graden;
     g.drawLine(lijnbreedte,lijnhoogte,(int)(lijnbreedte+straal* Math.sin(hoek)),(int)(lijnhoogte-straal* Math.cos(hoek)));


And it works  Smiley

thx for helping me out, i'm going to try your code now.
2  Game Development / Newbie & Debugging Questions / degrees question on: 2005-08-07 10:19:56
hi ,


this is my code

      formule = Math.abs( Xlength) /  ( Math.sqrt( Math.power(Xlenght,2)+Math.power(Yhight,2) )  )
      now i need to put that formule into arc  (degrees)
      example : the arc from (0.706214689) = 45°


       Is there a Math formule for it to covert it to arc?

example:


I want that the drawed line is always directed to the player.

thx for helping

     
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