// Copyright 2001 freehep
package org.freehep.graphicsio;
import com.google.code.appengine.awt.Shape;
import com.google.code.appengine.awt.geom.AffineTransform;
import com.google.code.appengine.awt.geom.PathIterator;
import java.io.IOException;
/**
* Implements some of the PathConstructor functionality
*
* @author Mark Donszelmann
* @version $Id: AbstractPathConstructor.java 8584 2006-08-10 23:06:37Z duns $
*/
public abstract class AbstractPathConstructor implements PathConstructor {
protected double currentX, currentY;
protected AbstractPathConstructor() {
currentX = 0;
currentY = 0;
}
public void flush() throws IOException {
currentX = 0;
currentY = 0;
}
public boolean addPath(Shape s) throws IOException {
return addPath(s, null);
}
public boolean addPath(Shape s, AffineTransform transform)
throws IOException {
return addPath(this, s, transform);
}
public static boolean addPath(PathConstructor out, Shape s,
AffineTransform transform) throws IOException {
PathIterator path = s.getPathIterator(transform);
double[] coords = new double[6];
double pathStartX = 0.;
double pathStartY = 0.;
while (!path.isDone()) {
int segType = path.currentSegment(coords);
switch (segType) {
case PathIterator.SEG_MOVETO:
out.move(coords[0], coords[1]);
pathStartX = coords[0];
pathStartY = coords[1];
break;
case PathIterator.SEG_LINETO:
out.line(coords[0], coords[1]);
break;
case PathIterator.SEG_QUADTO:
out.quad(coords[0], coords[1], coords[2], coords[3]);
break;
case PathIterator.SEG_CUBICTO:
out.cubic(coords[0], coords[1], coords[2], coords[3],
coords[4], coords[5]);
break;
case PathIterator.SEG_CLOSE:
out.closePath(pathStartX, pathStartY);
break;
}
// Move to the next segment.
path.next();
}
out.flush();
return (path.getWindingRule() == PathIterator.WIND_EVEN_ODD);
}
public static boolean isEvenOdd(Shape s) {
return s.getPathIterator(null).getWindingRule() == PathIterator.WIND_EVEN_ODD;
}
}