@Override
public void start(Stage stage) throws Exception {
Point[] sample =
new Point[] {
new Point(20, 10), new Point(50, 50),
new Point(10, 20), new Point(100, 30),
new Point(100, 200), new Point(30, 30),
};
ArrayList<Point> result = convexHull(sample);
System.out.println("Left with: " + result.toString());
// for animated spawning of dots
Circle[] sampleDots = new Circle[sample.length];
for (int i = 0; i < sampleDots.length; i++) {
sampleDots[i] = new Circle(sample[i].x, sample[i].y, 3);
sampleDots[i].setFill(Color.RED);
sampleDots[i].opacityProperty().set(0);
if (result.contains(sample[i])) sampleDots[i].setFill(Color.DARKCYAN);
bp.getChildren().add(sampleDots[i]);
sampleDots[i].toFront();
}
// polygon of result
Polygon p = new Polygon();
p.setFill(Color.TRANSPARENT);
p.setStroke(Color.BLACK);
p.setStrokeWidth(3);
for (Point pt : result) {
p.getPoints().addAll(Double.valueOf(pt.x), Double.valueOf(pt.y));
}
bp.getChildren().add(p);
// scene & stage related
Scene scene = new Scene(bp, 250, 250);
stage.setScene(scene);
stage.setResizable(false);
stage.setTitle("Sample Convex Hull");
stage.show();
// animated spawning of dots
p.toBack();
Timeline tl = new Timeline();
for (int i = 0; i < sampleDots.length; i++) {
tl.getKeyFrames()
.add(
new KeyFrame(
Duration.seconds(1), new KeyValue(sampleDots[i].opacityProperty(), 1.0)));
}
tl.setCycleCount(1);
tl.play();
}
@Override
public void start(Stage stage) {
/*
The following snippet of code creates two triangles. Both use MITER line join by
default. The first triangle uses 2.0 as the miter limit. The second triangle uses the default miter limit, which
is 10.0. The stroke width is 10px. The first triangle tries to join the corners by extending two lines up to 20px,
which is computed by multiplying the 10px stroke width by the miter limit of 2.0. The corners cannot be
joined using the MITER join within 20px, so a BEVEL join is used.
*/
SVGPath t1 = new SVGPath();
t1.setContent("M50, 0L0, 50 L100, 50 Z");
t1.setStrokeWidth(10);
t1.setFill(null);
t1.setStroke(Color.BLACK);
t1.setStrokeMiterLimit(2.0);
SVGPath t2 = new SVGPath();
t2.setContent("M50, 0L0, 50 L100, 50 Z");
t2.setStrokeWidth(10);
t2.setFill(null);
t2.setStroke(Color.BLACK);
/*
A MITER line join joins two path elements by extending their outer edges. If the path elements meet at
a smaller angle, the length of the join may become very big. You can limit the length of the join using the
strokeMiterLimit property. It specifies the ratio of the miter length and the stroke width. The miter length
is the distance between the most inside point and the most outside point of the join. If the two path elements
cannot meet by extending their outer edges within this limit, a BEVEL join is used instead. The default value
is 10.0. That is, by default, the miter length may be up to ten times the stroke width.
By default, the stroke draws a solid outline. You can also have a dashed outline. You need to provide
a dashing pattern and a dash offset. The dashing pattern is an array of double that is stored in an
ObservableList<Double>. You can get the reference of the list using the getStrokeDashArray() method of
the Shape class. The elements of the list specify a pattern of dashes and gaps. The first element is the dash
length, the second gap, the third dash length, the fourth gap, and so on. The dashing pattern is repeated to
draw the outline. The strokeDashOffset property specifies the offset in the dashing pattern where the
stroke begins.
*/
Polygon p1 = new Polygon(0, 0, 100, 0, 100, 50, 0, 50, 0, 0);
p1.setFill(null);
p1.setStroke(Color.BLACK);
p1.getStrokeDashArray().addAll(15.0, 5.0, 5.0, 5.0);
Polygon p2 = new Polygon(0, 0, 100, 0, 100, 50, 0, 50, 0, 0);
p2.setFill(null);
p2.setStroke(Color.BLACK);
p2.getStrokeDashArray().addAll(15.0, 5.0, 5.0, 5.0);
p2.setStrokeDashOffset(20.0);
HBox root = new HBox(t1, t2, p1, p2);
root.setAlignment(Pos.CENTER);
root.setSpacing(10);
root.setStyle(
"-fx-padding: 10;"
+ "-fx-border-style: solid inside;"
+ "-fx-border-width: 2;"
+ "-fx-border-insets: 5;"
+ "-fx-border-radius: 5;"
+ "-fx-border-color: blue;");
Scene scene = new Scene(root);
stage.setScene(scene);
stage.setTitle("Using Different Stroke Types for Shapes");
stage.show();
}