void QChain::cutCircle(Circle circle) {
if (m_vertices.size() == 0) return;
circle.setCenter(circle.pos());
QPainterPath cr;
cr.addEllipse(circle.x - circle.r, circle.y - circle.r, 2 * circle.r,
2 * circle.r);
QPolygonF polygon;
for (QPointF p : m_vertices) polygon.append(p);
QPainterPath chain;
chain.addPolygon(polygon);
if (!chain.intersects(cr)) return;
chain = chain.subtracted(cr);
for (const QPolygonF &poly : chain.toSubpathPolygons()) {
std::vector<Vector2d> pts(poly.begin(), poly.end() - 1);
if (std::fabs(Geometry::area(pts.begin(), pts.end())) > 5.f) {
auto chain = std::make_unique<QChain>(world());
chain->setVertices(std::vector<QPointF>(pts.begin(), pts.end()));
chain->initializeLater(world());
world()->itemSet()->addBody(std::move(chain));
}
}
m_vertices.clear();
destroyLater();
}
void Bullet::beginContact(QFixture* f, b2Contact*) {
if (f->isSensor()) return;
if (dynamic_cast<Enemy*>(f->parent()))
m_punchSound->play();
else {
m_destroyed = true;
destroyLater();
}
}
void Bullet::beginContact(QFixture *other, b2Contact *) {
if (other->isSensor()) return;
destroyLater();
ParticleSystem *p = static_cast<World *>(world())->particleSystem();
p->addExplosion(worldCenter(), 5, 0.1, 20);
if (QChain *chain = dynamic_cast<QChain *>(other->body())) {
chain->cutCircle(Circle(Vector2d(worldCenter()), 5));
}
}
