private Point isMoreClose(int x, int y, Point closestPoint, Point[] intersectionPoints) {
double clothestDistance =
closestPoint != null
? Math.sqrt(Math.pow(x - closestPoint.getX(), 2) + Math.pow(y - closestPoint.getY(), 2))
: -1;
Point selectedPoint = null;
for (Point point : intersectionPoints) {
if (point == null) {
continue;
}
double distance = Math.sqrt(Math.pow(x - point.getX(), 2) + Math.pow(y - point.getY(), 2));
if (distance < clothestDistance || clothestDistance == -1) {
clothestDistance = distance;
selectedPoint = point;
}
}
return selectedPoint;
}
private synchronized void calculateInstantImpacts(
Person shooter, Projectile projectile, Room room) {
double xStart = projectile.getxStart();
double yStart = projectile.getyStart();
Person closestPerson = null;
Point closestPoint = null;
for (AbstractZone zone : room.getMap().getZones()) {
if (zone.isShootable()) {
continue;
}
Bounds zoneBounds = GeometryService.getRectangle(zone);
Point[] zoneIntersection =
LineService.lineBoundsIntersections(
new Line(
new Point(shooter.getX(), shooter.getY()),
new Point(projectile.getxEnd(), projectile.getyEnd())),
zoneBounds);
Point closest =
isMoreClose(
(int) projectile.getxStart(),
(int) projectile.getyStart(),
new Point(projectile.getxEnd(), projectile.getyEnd()),
zoneIntersection);
if (closest != null) {
closestPoint = closest;
projectile.setxEnd((int) closest.getX());
projectile.setyEnd((int) closest.getY());
}
}
for (Person person : room.getPersons().values()) {
Point linePointB = new Point((double) projectile.getxEnd(), (double) projectile.getyEnd());
Point[] intersectionPoints =
LineService.lineIntersectCircle(
new Line(new Point(xStart, yStart), linePointB),
new Circle(person.getX(), person.getY(), PersonWebSocketEndpoint.PERSON_RADIUS));
if (shooter == person) {
projectile.setxStart((int) intersectionPoints[0].getX());
projectile.setyStart((int) intersectionPoints[0].getY());
continue;
}
if (intersectionPoints != null && intersectionPoints.length > 0) {
Point closest =
isMoreClose(
(int) shooter.getX(), (int) shooter.getY(), closestPoint, intersectionPoints);
if (closest != null) {
if (projectile.isPiercing()) {
onDamage(shooter, projectile.getDamage(), person, room);
} else {
closestPoint = closest;
closestPerson = person;
}
}
}
}
if (closestPerson != null) {
onDamage(shooter, projectile.getDamage(), closestPerson, room);
}
if (closestPoint != null) {
projectile.setxEnd((int) closestPoint.getX());
projectile.setyEnd((int) closestPoint.getY());
}
}