dot.java

Cubic Spline Interpolation

import java.awt.*;

public class Dot
  implements Drawable
{
  public String name;
  public int x, y;
  public boolean xMovable;
  public boolean yMovable;
  public Color color;
  public Drawable xSrc;
  public Drawable ySrc;

  public Dot( String name, int x, int y,
                boolean xMovable, boolean yMovable, Color color )
  {
    this.name = name;
    this.x = x;
    this.y = y;
    this.xMovable = xMovable;
    this.yMovable = yMovable;
    this.color = color;
  }

  public void paint( Graphics g )
  {
    if( color == null )
      return;
    g.setColor( color );
    g.fillOval( getX() - 2, getY() - 2, 5, 5 );
  }

  public int getX()
  {
    if( xSrc != null )
      x = xSrc.getX();
    return x;
  }
  public int getY()
  {
    if( ySrc != null )
      y = ySrc.getY();
    return y;
  }

  public void requestMove( int x, int y )
  {
    if( xMovable && ( xSrc == null ) )
      this.x = x;
    if( yMovable && ( ySrc == null ) )
      this.y = y;
  }

  int separation( int x, int y )
  {
    int dx = Math.abs( x - getX() );
    int dy = Math.abs( y - getY() );
    return Math.max( dx, dy );
  }
}