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  Making a simple circle  (Read 852 times)
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Offline Middy

Junior Member




Java games rock!


« Posted 2003-10-26 12:27:41 »

Any goods tips on that I know it must be a number of small line segments but I cant figure out the algorithm

When do I get my makeMyGameAsILike() extension?
Offline Orangy Tang

JGO Kernel


Medals: 56
Projects: 11


Monkey for a head


« Reply #1 - Posted 2003-10-26 13:12:25 »

Copy & pasted from some nearby code:
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            int numSubdivisions = 32;
           
            gl.glBegin(GL.GL_LINE_STRIP);
            {
                  // Set edge colour for whole of shape
                 gl.glColor3f(1f, 1f, 1f);
                 
                  for (float angle=0; angle<=Math.PI*2; angle+=((Math.PI*2)/numSubdivisions) )
                  {

                        gl.glVertex3f(      radius*(float)Math.cos(angle) + center.x,
                                                radius*(float)Math.sin(angle) + center.y, Renderer.WIREFRAME_RENDER_DEPTH);
                       
                  }
                 
                  gl.glVertex3f(center.x+radius, center.y, Renderer.WIREFRAME_RENDER_DEPTH);
            }
            gl.glEnd();

Obviously you might want to switch the depth or even the axies depending on which plane you want it to lie. I suppose it might be a better idea to use LINE_LOOP and omit the last vertex as well.

[ TriangularPixels.com - Play Growth Spurt, Rescue Squad and Snowman Village ] [ Rebirth - game resource library ]
Offline Middy

Junior Member




Java games rock!


« Reply #2 - Posted 2003-10-26 13:27:26 »

thanks it works perfectly Smiley

When do I get my makeMyGameAsILike() extension?
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