// int x1, x2, y;
private void drawLine(int currentY, int index) {
// добавление рассматриваемых плоскостей
for (; index < setBorders.size() && setBorders.get(index) >= currentY; index++) {
changeDrawnSurfacesList(currentY, true);
}
// поиск всех точек, пересекающих эту плоскость, и составление из них отрезков
// поиск точек пересечения между этими отрезками
findAllIntersections(currentY);
// сортировка
pointsList =
(ArrayList<Point>)
pointsList
.stream()
.sorted((a, b) -> Double.compare(a.getX(), b.getX()))
.collect(Collectors.toList());
// отрисовка
Point last = new Point(0, currentY, 0);
for (Point p : pointsList) {
ArrayList<PointEvent> events = listPointsEvent.getEvent((int) p.getX());
for (PointEvent event : events) {
if (event.event == PointEventsList.START) {
drawnSegments.add(event.point.getParent());
}
}
if (drawnSegments.size() > 0) {
double maxZ = -Double.MAX_VALUE;
Segment chosen = null;
for (Segment seg : drawnSegments) {
double z = seg.getZOnX(p.getX());
if (z > maxZ) {
maxZ = z;
chosen = seg;
}
}
if (chosen != null && maxZ > -Double.MAX_VALUE) {
context.setStroke(chosen.getSurfaceColor());
double x1 = canvas.getWidth() / 4 + last.getX() * 2,
x2 = canvas.getWidth() / 4 + p.getX() * 2,
y = canvas.getHeight() / 2 + currentY;
context.strokeLine(x1, y, x2, y);
}
}
// актуализация отрезков
for (PointEvent event : events) {
if (event.event == PointEventsList.FINISH) {
drawnSegments.remove(event.point.getParent());
}
}
last = p;
}
}
public void initTimer(int currentY, int index) {
for (; index < setBorders.size() && setBorders.get(index) >= currentY; index++) {
changeDrawnSurfacesList(currentY, true);
}
findAllIntersections(currentY);
pointsList =
(ArrayList<Point>)
pointsList
.stream()
.sorted((a, b) -> Double.compare(a.getX(), b.getX()))
.collect(Collectors.toList());
Point last = new Point(0, currentY, 0);
for (Point p : pointsList) {
ArrayList<PointEvent> events = listPointsEvent.getEvent((int) p.getX());
for (PointEvent event : events) {
if (event.event == PointEventsList.START) {
drawnSegments.add(event.point.getParent());
}
}
if (drawnSegments.size() > 0) {
double maxZ = -Double.MAX_VALUE;
Segment chosen = null;
for (Segment seg : drawnSegments) {
double z = seg.getZOnX(p.getX());
if (z > maxZ) {
maxZ = z;
chosen = seg;
}
}
if (chosen != null && maxZ > -Double.MAX_VALUE) {
// context.setStroke(chosen.getSurfaceColor());
double x1 = canvas.getWidth() / 4 + last.getX() * 2,
x2 = canvas.getWidth() / 4 + p.getX() * 2,
y = canvas.getHeight() / 2 + currentY;
Segment segment =
new Segment(new Point(x1, y, 0), new Point(x2, y, 0), chosen.getSurfaceColor());
result.add(segment);
// context.strokeLine(x1, y, x2, y);
}
}
// актуализация отрезков
for (PointEvent event : events) {
if (event.event == PointEventsList.FINISH) {
drawnSegments.remove(event.point.getParent());
}
}
last = p;
}
AnimationTimer timer =
new AnimationTimer() {
@Override
public void handle(long now) {
if (indexResult == result.size() - 1) {
stop();
return;
}
segmentResult = result.get(indexResult++);
context.setStroke(segmentResult.getSurfaceColor());
context.strokeLine(
segmentResult.getStart().getX(),
segmentResult.getStart().getY(),
segmentResult.getFinish().getX(),
segmentResult.getFinish().getY());
}
};
timer.start();
}