/*
* Open Source Physics software is free software as described near the bottom of this code file.
*
* For additional information and documentation on Open Source Physics please see:
* <http://www.opensourcephysics.org/>
*/
package org.opensourcephysics.display3d.simple3d;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import org.opensourcephysics.controls.XML;
import org.opensourcephysics.controls.XMLControl;
/**
* <p>Title: ElementCircle</p>
* <p>Description: A Circle using the painter's algorithm</p>
* @author Francisco Esquembre
* @version March 2005
*/
public class ElementCircle extends Element implements org.opensourcephysics.display3d.core.ElementCircle {
// Configuration variables
private double angle = 0.0;
// Implementation variables
private double[] coordinates = new double[3];
private double[] size = new double[3];
private double[] pixel = new double[3]; // The ouput of position projections
private double[] pixelSize = new double[2]; // The ouput of size projections
private Object3D[] objects = new Object3D[] {new Object3D(this, 0)};
private AffineTransform transform = new AffineTransform(), originalTransform = null;
{
setSizeXYZ(0, 0, 0);
}
// -------------------------------------
// New configuration methods
// -------------------------------------
public void setRotationAngle(double angle) {
this.angle = angle;
}
public double getRotationAngle() {
return this.angle;
}
// -------------------------------------
// Abstract part of Element
// -------------------------------------
Object3D[] getObjects3D() {
if(!isReallyVisible()) {
return null;
}
if(hasChanged()||needsToProject()) {
projectPoints();
}
return objects;
}
void draw(Graphics2D _g2, int _index) {
// Allow the panel to adjust color according to depth
Color theColor = getDrawingPanel3D().projectColor(getRealStyle().getLineColor(), objects[0].getDistance());
Color theFillColor = getDrawingPanel3D().projectColor(getRealStyle().getFillColor(), objects[0].getDistance());
drawIt(_g2, theColor, theFillColor);
}
void drawQuickly(Graphics2D _g2) {
if(!isReallyVisible()) {
return;
}
if(hasChanged()||needsToProject()) {
projectPoints();
}
drawIt(_g2, getRealStyle().getLineColor(), null); // getRealStyle().getFillColor());
}
// -------------------------------------
// Interaction
// -------------------------------------
protected InteractionTarget getTargetHit(int x, int y) {
if(!isReallyVisible()) {
return null;
}
if(hasChanged()||needsToProject()) {
projectPoints();
}
if(targetPosition.isEnabled()&&(Math.abs(pixel[0]-x)<SENSIBILITY)&&(Math.abs(pixel[1]-y)<SENSIBILITY)) {
return targetPosition;
}
return null;
}
// -------------------------------------
// Private methods
// -------------------------------------
private void projectPoints() {
coordinates[0] = coordinates[1] = coordinates[2] = 0.0;
sizeAndToSpaceFrame(coordinates);
getDrawingPanel3D().project(coordinates, pixel);
objects[0].setDistance(pixel[2]*getStyle().getDepthFactor());
size[0] = getSizeX();
size[1] = getSizeY();
size[2] = getSizeZ();
getDrawingPanel3D().projectSize(coordinates, size, pixelSize);
setElementChanged(false);
setNeedToProject(false);
}
private void drawIt(Graphics2D _g2, Color _color, Color _fill) {
int xc = (int) (pixel[0]-pixelSize[0]/2), yc = (int) (pixel[1]-pixelSize[1]/2);
_g2.setStroke(getRealStyle().getLineStroke());
if(angle!=0.0) {
originalTransform = _g2.getTransform();
transform.setTransform(originalTransform);
transform.rotate(-angle, pixel[0], pixel[1]);
_g2.setTransform(transform);
}
if(getRealStyle().isDrawingFill()&&(_fill!=null)) { // First fill the inside
_g2.setPaint(_fill);
_g2.fillOval(xc, yc, (int) pixelSize[0]+1, (int) pixelSize[1]+1); // Is this a bug in Awt?
}
if(getRealStyle().isDrawingLines()&&(_color!=null)) {
_g2.setColor(_color);
_g2.drawOval(xc, yc, (int) pixelSize[0], (int) pixelSize[1]);
}
if(angle!=0.0) {
_g2.setTransform(originalTransform);
}
}
// ----------------------------------------------------
// XML loader
// ----------------------------------------------------
/**
* Returns an XML.ObjectLoader to save and load object data.
* @return the XML.ObjectLoader
*/
public static XML.ObjectLoader getLoader() {
return new Loader();
}
static private class Loader extends org.opensourcephysics.display3d.core.ElementCircle.Loader {
public Object createObject(XMLControl control) {
return new ElementCircle();
}
}
}
/*
* Open Source Physics software is free software; you can redistribute
* it and/or modify it under the terms of the GNU General Public License (GPL) as
* published by the Free Software Foundation; either version 2 of the License,
* or(at your option) any later version.
* Code that uses any portion of the code in the org.opensourcephysics package
* or any subpackage (subdirectory) of this package must must also be be released
* under the GNU GPL license.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA
* or view the license online at http://www.gnu.org/copyleft/gpl.html
*
* Copyright (c) 2007 The Open Source Physics project
* http://www.opensourcephysics.org
*/