private void drawLine(Graphics g, Vector p, Vector q) {
// FIXME: maybe eliminate class instantiations
// from this method for performance reasons:
// use static point arrays for transformations
Vector u = rotation.apply(p.sub(origin));
Vector v = rotation.apply(q.sub(origin));
Point2D.Double from = new Point2D.Double(u.getX(), u.getZ());
Point2D.Double to = new Point2D.Double(v.getX(), v.getZ());
Point ifrom = new Point();
Point ito = new Point();
transform.transform(from, ifrom);
transform.transform(to, ito);
// g.drawLine(xInt(u.getX()),yInt(u.getZ()),
// xInt(v.getX()),yInt(v.getZ()));
g.drawLine(ifrom.x, ifrom.y, ito.x, ito.y);
}
private void initTransform(Graphics g) throws Exception {
// Perform transformation
transform = new AffineTransform();
double dw = 1;
double minw = 0;
double dh = 0;
double minh = 0;
double scale;
double x;
double y;
// double abs;
final int margin = 5;
int showLevel = previewTree.getShowLevel();
class FindAStem extends DefaultTreeTraversal {
Stem found = null;
int level;
public FindAStem(int level) {
this.level = level;
}
public Stem getFound() {
return found;
}
public boolean enterStem(Stem stem) {
if (found == null && stem.stemlevel < level) return true; // look further
else if (found != null || stem.stemlevel > level) return false; // found a stem or too deep
else if (stem.stemlevel == level) found = stem;
return true;
}
public boolean leaveTree(Tree tree) {
return (found != null);
}
}
if (showLevel < 1) {
setOrigin(new Vector());
//////////// FRONT view
if (perspective == PERSPECTIVE_FRONT) {
// get width and height of the tree
dw = previewTree.getWidth() * 2;
dh = previewTree.getHeight();
minh = 0;
minw = -dw / 2;
///////////////// TOP view
} else {
// get width of the tree
dw = previewTree.getWidth() * 2;
minw = -dw / 2;
}
} else {
// find stem which to show
/* Enumeration e = previewTree.allStems(showLevel-1);
if (! e.hasMoreElements()) throw new Exception("Stem not found");
Stem stem = (Stem)e.nextElement();
*/
Stem aStem = null;
FindAStem stemFinder = new FindAStem(showLevel - 1);
if (previewTree.traverseTree(stemFinder)) {
aStem = stemFinder.getFound();
}
if (aStem != null) {
Vector diag = aStem.getMaxPoint().sub(aStem.getMinPoint());
Vector orig = aStem.getTransformation().getT();
setOrigin(new Vector(orig.getX(), orig.getY(), 0));
Vector max = aStem.getMaxPoint();
Vector min = aStem.getMinPoint();
// get greatest distance from orig
x = Math.max(Math.abs(min.getX() - orig.getX()), Math.abs(max.getX() - orig.getX()));
y = Math.max(Math.abs(min.getY() - orig.getY()), Math.abs(max.getY() - orig.getY()));
dw = Math.sqrt(x * x + y * y) * 2;
minw = -dw / 2;
dh = diag.getZ();
minh = min.getZ();
}
// DEBUG
// System.err.println("O: "+ orig +" min: "+min+" max: "+max);
// System.err.println("maxX: "+x+" maxY: "+y);
// System.err.println("dg: "+diag+" dw: "+dw+" minw: "+minw+" dh: "+dh+" minh: "+minh);
}
//////////// FRONT view
if (perspective == PERSPECTIVE_FRONT) {
// how much to scale for fitting into view?
scale = Math.min((getHeight() - 2 * margin) / dh, (getWidth() - 2 * margin) / dw);
if (previewTree.params.debug) System.err.println("scale: " + scale);
// shift to mid point of the view
transform.translate(getWidth() / 2, getHeight() / 2);
// scale to image height
transform.scale(scale, -scale);
// shift mid of the tree to the origin of the image
transform.translate(-minw - dw / 2, -minh - dh / 2);
///////////////// TOP view
} else {
// how much to scale for fitting into view?
scale = Math.min((getHeight() - 2 * margin) / dw, (getWidth() - 2 * margin) / dw);
// shift to mid point of the view
transform.translate(getWidth() / 2, getHeight() / 2);
// scale to image height
transform.scale(scale, -scale);
// shift mid of the stem to the origin of the image
transform.translate(-minw - dw / 2, -minw - dw / 2);
}
// DEBUG
Point p = new Point();
transform.transform(new Point2D.Double(0.0, 0.0), p);
if (previewTree.params.debug) {
System.err.println("width: " + minw + "+" + dw);
System.err.println("height: " + minh + "+" + dh);
System.err.println("Origin at: " + p);
System.err.println("view: " + getWidth() + "x" + getHeight());
}
}