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Drawing sinusoidal wave

Posted on 1998-12-18
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1,025 Views
Last Modified: 2008-03-10
Hi all again!! do you have a function which draws a sin wave using the sin method of Math class? Or at least, can you guide me in programming that function by myself?

Thanks a lot in advance
jstuardo@aclaris.cl
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Question by:skel
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malexiev earned 50 total points
ID: 1229731
Try this:

  import java.awt.*;  
  import java.applet.*;
 
  public class Test
  extends Applet {  
   
    private final double scale = 50;
    private double step = 1 / scale;
   
    public Test() {
    }    
   
    public void drawSin(Graphics g, double x0, double x1) {
     
      g.setColor(Color.red);      
      int i = 0;      
      int y0 = getBounds().height >> 1;
      for (double f = x0; f < x1; f += step,i++) {
        g.drawLine(i, (int)((Math.sin(f)) * scale + y0),
                   i, (int)((Math.sin(f)) * scale + y0));
       
      }
    }
   
    public void paint(Graphics g) {
      drawSin(g, -Math.PI, Math.PI);
    }
  }

Hope this helps.
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