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Simple, reusable, 3D surface-plotter library in Java/Swing.
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/*----------------------------------------------------------------------------------------*
* LineAccumulator.java *
* *
* Surface Plotter version 1.30b1 17 May 1997 *
* version 1.30b2 18 Oct 2001 *
* *
* Copyright (c) Yanto Suryono *
* *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published by the *
* Free Software Foundation; either version 2 of the License, or (at your option) *
* any later version. *
* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for *
* more details. *
* *
* You should have received a copy of the GNU Lesser General Public License along *
* with this program; if not, write to the Free Software Foundation, Inc., *
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
* *
*----------------------------------------------------------------------------------------*/
package com.googlecode.surfaceplotter;
import java.awt.Graphics;
import java.util.Enumeration;
import java.util.Vector;
/**
* The class LineAccumulator accumulates line drawing information and
* then draws all accumulated lines together. It is used as contour lines accumulator
* in Surface Plotter.
*
* @author Yanto Suryono
*/
public class LineAccumulator {
private Vector accumulator;
/**
* The constructor of LineAccumulator
*/
LineAccumulator() {
accumulator = new Vector();
}
/**
* Adds a line to the accumulator.
*
* @param x1 the first point's x coordinate
* @param y1 the first point's y coordinate
* @param x2 the second point's x coordinate
* @param y2 the second point's y coordinate
*/
public void addLine(int x1, int y1, int x2, int y2) {
if (x1<=0 || y1<=0 || x2<=0 || y2<=0 ) return;
//System.out.println("("+x1+","+y1+","+x2+","+y2+")");
accumulator.addElement(new LineRecord(x1,y1,x2,y2));
}
/**
* Clears accumulator.
*/
public void clearAccumulator() {
accumulator.removeAllElements();
}
/**
* Draws all accumulated lines.
*
* @param g the graphics context to draw
*/
public void drawAll(Graphics g) {
Enumeration enumeration = accumulator.elements();
while (enumeration.hasMoreElements()) {
LineRecord line = (LineRecord)(enumeration.nextElement());
g.drawLine(line.x1,line.y1,line.x2,line.y2);
}
}
}
/**
* Represents a stright line.
* Used by LineAccumulator class.
*
* @see LineAccumulator
*/
class LineRecord extends Object {
/**
* @param x1 the first point's x coordinate
*/
public int x1;
/**
* @param y1 the first point's y coordinate
*/
public int y1;
/**
* @param x2 the second point's x coordinate
*/
public int x2;
/**
* @param y2 the second point's y coordinate
*/
public int y2;
/**
* The constructor of LineRecord
*
* @param x1 the first point's x coordinate
* @param y1 the first point's y coordinate
* @param x2 the second point's x coordinate
* @param y2 the second point's y coordinate
*/
LineRecord(int x1, int y1, int x2, int y2) {
super();
this.x1 = x1; this.y1 = y1;
this.x2 = x2; this.y2 = y2;
}
}