1.[代碼][Java]代碼

public class DrawLineByDDA extends JPanel {

private float dx, dy, length,x, y;

private int zx,zy;

private int x0, y0, x1, y1;

private Color color;

private Logger logger=Logger.getLogger(this.getClass().getName());

/**

* Constructor

*/

public DrawLineByDDA(int x0, int y0, int x1, int y1, Color color) {

this.x0=x0;

this.y0=y0;

this.x1=x1;

this.y1=y1;

this.color=color;

}

@Override

public void paint(Graphics g) {

super.paint(g);

g.setColor(color);

zx = Math.abs(x1 - x0);

zy = Math.abs(y1 - y0);

logger.log(Level.INFO, "zx:"+zx+",zy:"+zy);

if (zx >= zy) {

length = zx;

logger.log(Level.INFO, "length:"+length);

} else {

length = zy;

logger.log(Level.INFO, "length:"+length);

}

dx = (x1 - x0) / length;

dy = (y1 - y0) / length;

logger.log(Level.INFO, "dx:"+dx+",dy:"+dy);

x = x0;

y = y0;

for (int i = 1; i < length; i++) {

logger.log(Level.INFO, "x:"+x+",y:"+y);

g.drawRect((int) (x + 0.5), (int) (y + 0.5), 0, 0);

x = x + dx;

y = y + dy;

}

}

}

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