/**
* Z-Sorts and draws all 3D objects which have been added to the collection of objects to draw via
* the add3DObject() method.
*
* @param g the Graphics on which to draw the 3D objects.
*/
public void drawObjectsOnThis(Graphics g) {
synchronized (objects) {
// calculate all rotations
for (Iterator<Object3D> it = objects.iterator(); it.hasNext(); ) {
Object3D currentObject = it.next();
// very rarely, when the "objects" list is being modified by
// another thread, "currentObject" is null here
if (currentObject != null) currentObject.calculateRotation(window);
else
// if we are here, then that strange thread error has
// occurred, and it causes an exception to be thrown
// when
// Collections.sort() is called later, so just
// return now to prevent further errors
return;
}
// Z-Sort
Collections.sort(objects, depthComparator);
// Draw all objects
Graphics2D g2D = (Graphics2D) g;
for (Iterator<Object3D> it = objects.iterator(); it.hasNext(); ) it.next().drawOnThis(g2D);
}
}
/**
* Figures out the object which, when drawn on the screen, the specified point is "inside"
*
* @param point the point to look for objects under
* @return the object which, when drawn on the screen, the specified point is "inside", or null if
* the point is not over an object.
*/
public Object3D getObjectWhichContainsPoint(Point point) {
for (Iterator<Object3D> it = objects.iterator(); it.hasNext(); ) {
Object3D currentObject = it.next();
if (currentObject.contains(point)) return currentObject;
}
return null;
}
/**
* Z-Sorts and draws all 3D objects which have been added to the collection of objects to draw via
* the add3DObject() method. The progress of the drawing is instrumented with the specified
* progress monitor.
*
* @param g the Graphics on which to draw the 3D objects.
* @param progressMonitor the progress monitor which will be updated with the progress of drawing
* the objects. If the progress dialog is cancelled, then the drawing stops.
*/
public void drawObjectsOnThis(Graphics g, ProgressMonitor progressMonitor) {
synchronized (objects) {
progressMonitor.setProgress(1);
progressMonitor.setNote("Calculating rotations...");
for (Iterator<Object3D> it = objects.iterator(); it.hasNext(); ) {
Object3D currentObject = it.next();
// check for cancellation
if (progressMonitor.isCanceled()) return;
// very rarely, when the "objects" list is being modified by
// another thread, "currentObject" here is null
if (currentObject != null) currentObject.calculateRotation(window);
else
// if we are here, then that strange thread error has
// occurred, and it causes an exception to be thrown when
// Collections.sort() is called later, so just
// return now to prevent further errors
return;
}
progressMonitor.setNote("Z-Sorting...");
// Z-Sort
Collections.sort(objects, depthComparator);
// Draw all objects
Graphics2D g2D = (Graphics2D) g;
double numberOfObjects = (double) objects.size();
double currentIndex = 1;
progressMonitor.setNote("Drawing objects...");
int maxProgress = progressMonitor.getMaximum();
for (Iterator<Object3D> it = objects.iterator(); it.hasNext(); ) {
// check for cancellation
if (progressMonitor.isCanceled()) return;
else {
progressMonitor.setProgress((int) (currentIndex++ / numberOfObjects * maxProgress));
it.next().drawOnThis(g2D);
}
}
}
}