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Java source code of 'jhplot.jadraw.JaPArc'
/*
* Title: japlot.jaxodraw
* Description: Graphical user interface for drawing Feynman diagrams
* @author Daniele Binosi
* @author Lukas Theussl
Copyright (C) 2003-2006, Daniele Binosi and Lukas Theussl
See the file LICENSE in the source distribution home directory
for a full copy of the GPL (GNU General Public License).
This file is part of japlot.jaxodraw.
japlot.jaxodraw is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
japlot.jaxodraw 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 program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package jhplot.jadraw;
import japlot.jaxodraw.JaxoColor;
import java.awt.BasicStroke;
import java.awt.Dimension;
import org.freehep.graphics2d.VectorGraphics;
import java.awt.geom.AffineTransform;
import java.awt.geom.Arc2D;
import java.awt.geom.FlatteningPathIterator;
import java.awt.geom.GeneralPath;
import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
/** A photon arc. */
public class JaPArc extends JaArcObject {
/**
*
*/
private static final long serialVersionUID = 1L;
/** Constructor: calls super() and initializes the stangle to 0.*/
public JaPArc() {
super();
setStangle(0);
}
/** Returns an exact copy of this JaPArc.
* @return A copy of this JaPArc.
*/
public final JaObject copy() {
JaPArc temp = new JaPArc();
temp.setArcPts(getX1(), getY1(), getX2(), getY2(), getX(), getY());
temp.setX(getX());
temp.setY(getY());
temp.setAmp(getAmp());
temp.setFreq(getFreq());
temp.setColor(getColor());
temp.setStroke(getStroke());
temp.setDoubleLine(getDoubleLine());
temp.setDLSeparation(getDLSeparation());
temp.setSize(getWidth(), getHeight(), getRelw(), getRelh());
temp.setBoundingBox(getBoundingBox());
return temp;
}
/** Returns true if all serializable variables of this JaObject
* and those of the specified one are equal.
* @param comp A JaObject to compare with.
* @return True if the objects are equal, false otherwise.
*/
public final boolean isCopy(JaObject comp) {
boolean isCopy = false;
if (comp instanceof JaPArc) {
JaPArc arc = (JaPArc) comp;
if ((arc.getX1() == getX1()) && (arc.getX2() == getX2())
&& (arc.getY1() == getY1()) && (arc.getY2() == getY2())
&& (arc.getX() == getX()) && (arc.getY() == getY())
&& (arc.getAmp() == getAmp())
&& (arc.getFreq() == getFreq())
&& (arc.getColor().equals(getColor()))
&& (arc.getStroke() == getStroke())
&& (arc.getDoubleLine() == getDoubleLine())
&& (arc.getDLSeparation() == getDLSeparation())
&& (arc.getRelw() == getRelw())
&& (arc.getRelh() == getRelh())) {
isCopy = true;
}
}
return isCopy;
}
/** The method that draws this JaPArc.
* @param g2 The graphics context where the JaPArc has to be drawn.
* @param drawToScreen A boolean variable that indicates whether the
* drawing is done on the screen or somewhere else. This is used for
* exporting/printing, where the object handles should not be painted,
* even if they are visible on the screen.
*/
public final void jaxoDraw(VectorGraphics g2, boolean drawToScreen) {
GeneralPath gp = getGeneralPath();
if (testArea()) {
return;
} else {
gp.reset();
gp.moveTo(0.f, 0.f);
double[] par = getArcParameters();
if (isResizing()) {
g2.setStroke(new BasicStroke(1.f));
g2.setColor(JaxoColor.RED);
Arc2D arc = new Arc2D.Float();
if (getDoubleLine()) {
arc.setArc(-par[2] - getDLSeparation(),
-par[2] - getDLSeparation(),
2 * (par[2] + getDLSeparation()),
2 * (par[2] + getDLSeparation()), 0,
Math.toDegrees(par[3]), Arc2D.OPEN);
gp.append(arc, false);
arc.setArc(-par[2] + getDLSeparation(),
-par[2] + getDLSeparation(),
2 * (par[2] - getDLSeparation()),
2 * (par[2] - getDLSeparation()), 0,
Math.toDegrees(par[3]), Arc2D.OPEN);
} else {
arc.setArc(-par[2], -par[2], 2 * par[2], 2 * par[2], 0,
Math.toDegrees(par[3]), Arc2D.OPEN);
}
gp.append(arc, false);
gp = newtransarc(gp, par[0], par[1], par[4], 1.f);
g2.draw(gp);
} else {
g2.setColor(getColor());
g2.setStroke(new BasicStroke(getStroke()));
int a = getAmp();
int n;
float ts;
double arcLength = 2 * par[2] * Math.abs(par[3] / 2.d);
n = (2 * ((int) Math.round(arcLength / getFreq()))) + 1;
ts = (float) arcLength / n;
if (getDoubleLine()) {
//gp.reset();
gp.moveTo(0.f, getDLSeparation());
for (int i = 1; i <= n; i++) {
gp.quadTo((((2 * i) - 1) * ts) / 2.f,
-a + getDLSeparation(), i * ts, getDLSeparation());
a = -a;
}
//gp.reset();
gp.moveTo(0.f, -getDLSeparation());
for (int i = 1; i <= n; i++) {
gp.quadTo((((2 * i) - 1) * ts) / 2.f,
a - getDLSeparation(), i * ts, -getDLSeparation());
a = -a;
}
} else {
for (int i = 1; i <= n; i++) {
gp.quadTo((((2 * i) - 1) * ts) / 2.f, (float) -a,
i * ts, 0.f);
a = -a;
}
}
gp = conformalGP(gp, arcLength, -par[3]);
AffineTransform at = new AffineTransform();
at.translate(-par[2], 0.f);
at.scale(1 / (Math.abs(par[3]) / 2.d),
1 / (Math.abs(par[3]) / 2.d));
gp.transform(at);
gp = newtransarc(gp, par[0], par[1], par[4], 1.d);
g2.draw(gp);
}
Rectangle2D bb = gp.getBounds2D();
double[] bbox =
{bb.getMinX(), bb.getMinY(), bb.getMaxX(), bb.getMaxY()};
setBoundingBox(bbox);
}
}
/** The LaTeX command that is necessary to draw this JaPArc
* using the axodraw.sty package.
* @param scale A scale factor to translate Java coordinates to
* LaTeX coordinates.
* @param canvasDim The current dimension of the canvas.
* @return The corresponding axodraw LaTeX command.
*/
public final String latexCommand(float scale, Dimension canvasDim) {
double[] par = getArcParameters();
double cx = par[0] / scale;
double cy = (canvasDim.height - par[1]) / scale;
double r = par[2] / scale;
double ea = Math.toDegrees(par[3] - par[4]);
double sa = -Math.toDegrees(par[4]);
double amp = getAmp() / (2.d * scale);
double nwig =
(double) Math.round((2 * par[2] * Math.abs(par[3] / 2.d)) / getFreq())
+ 0.5;
String command = "";
String base = "\\PhotonArc";
if (getDoubleLine()) {
float offSet = getDLSeparation() / scale;
String command1 =
base + "(" + D_FORMAT.format(cx) + "," + D_FORMAT.format(cy)
+ ")" + "(" + D_FORMAT.format(r + offSet) + ","
+ D_FORMAT.format(sa) + "," + D_FORMAT.format(ea) + ")" + "{"
+ D_FORMAT.format(amp) + "}" + "{" + D_FORMAT.format(nwig)
+ "}";
String command2 =
base + "(" + D_FORMAT.format(cx) + "," + D_FORMAT.format(cy)
+ ")" + "(" + D_FORMAT.format(r - offSet) + ","
+ D_FORMAT.format(sa) + "," + D_FORMAT.format(ea) + ")" + "{"
+ D_FORMAT.format(amp) + "}" + "{" + D_FORMAT.format(nwig)
+ "}";
command =
command1.concat(command2.concat("%%JaxoDrawID:DoubleLine"
+ "(" + D_FORMAT.format(getDLSeparation()) + ")"));
} else {
command =
base + "(" + D_FORMAT.format(cx) + "," + D_FORMAT.format(cy)
+ ")" + "(" + D_FORMAT.format(r) + "," + D_FORMAT.format(sa)
+ "," + D_FORMAT.format(ea) + ")" + "{" + D_FORMAT.format(amp)
+ "}" + "{" + D_FORMAT.format(nwig) + "}";
}
return command;
}
/////////////////////////////////////////////////////////////////////////
//
// private auxiliary methods //
//
/////////////////////////////////////////////////////////////////////////
private Point2D conformal(float px, float py, double length, double angle) {
float nx =
(float) (
length / 2 * (
1
+ (
Math.exp((py * angle) / length) * Math.cos((
px * angle
) / length)
)
)
);
float ny =
(float) (
-length / 2 * Math.exp((py * angle) / length) * Math.sin((
-px * angle
) / length)
);
return new Point2D.Float(nx, ny);
}
private GeneralPath conformalGP(GeneralPath gpp, double length,
double angle) {
GeneralPath gp2 = new GeneralPath();
FlatteningPathIterator pi =
new FlatteningPathIterator(gpp.getPathIterator(null), 0.05);
float[] segm = new float[6];
int type;
float corr = (1.f - (20.f / (float) length));
gp2.moveTo(0.f, 0.f);
while (!pi.isDone()) {
type = pi.currentSegment(segm);
float px1 =
(float) conformal(segm[0], segm[1], length, angle).getX();
float py1 =
(float) conformal(segm[0], segm[1], length, angle).getY();
float px2 =
(float) conformal(segm[2], segm[3], length, angle).getX();
float py2 =
(float) conformal(segm[2], segm[3], length, angle).getY();
float px3 =
(float) conformal(segm[4], segm[5], length, angle).getX();
float py3 =
(float) conformal(segm[4], segm[5], length, angle).getY();
if (type == PathIterator.SEG_MOVETO) {
gp2.moveTo(px1, py1);
} else if (type == PathIterator.SEG_LINETO) {
gp2.lineTo(px1, py1);
} else if (type == PathIterator.SEG_QUADTO) {
px1 = (float) conformal(segm[0], corr * segm[1], length, angle)
.getX();
py1 = (float) conformal(segm[0], corr * segm[1], length, angle)
.getY();
gp2.quadTo(px1, py1, px2, py2);
} else if (type == PathIterator.SEG_CUBICTO) {
gp2.curveTo(px1, py1, px2, py2, px3, py3);
} else {
gp2.closePath();
}
pi.next();
}
return gp2;
}
}