QList<RVector> RSnapTangential::snapEntity(
QSharedPointer<REntity> entity,
const RVector& point,
const RBox& queryBox,
RGraphicsView& view) {
QList<RVector> ret;
RDocumentInterface* di = view.getDocumentInterface();
if (di==NULL) {
return ret;
}
QSharedPointer<RShape> shape = entity->getClosestShape(point, queryBox.getWidth()/2, true);
if (shape.isNull()) {
return ret;
}
QSharedPointer<RCircle> circle = shape.dynamicCast<RCircle>();
if (!circle.isNull()) {
QList<RLine> lines = circle->getTangents(di->getLastPosition());
for (int i=0; i<lines.length(); i++) {
ret.append(lines[i].getEndPoint());
}
}
QSharedPointer<RArc> arc = shape.dynamicCast<RArc>();
if (!arc.isNull()) {
QList<RLine> lines = arc->getTangents(di->getLastPosition());
for (int i=0; i<lines.length(); i++) {
ret.append(lines[i].getEndPoint());
}
}
QSharedPointer<REllipse> ellipse = shape.dynamicCast<REllipse>();
if (!ellipse.isNull()) {
QList<RLine> lines = ellipse->getTangents(di->getLastPosition());
for (int i=0; i<lines.length(); i++) {
ret.append(lines[i].getEndPoint());
}
}
return ret;
}
QList<RVector> RSnapPerpendicular::snapEntity(
QSharedPointer<REntity> entity,
const RVector& point,
const RBox& queryBox,
RGraphicsView& view) {
QList<RVector> ret;
RDocumentInterface* di = view.getDocumentInterface();
if (di==NULL) {
return ret;
}
QSharedPointer<RShape> shape = entity->getClosestShape(point, queryBox.getWidth()/2, true);
if (shape.isNull()) {
return ret;
}
ret.append(shape->getClosestPointOnShape(di->getLastPosition(), false));
return ret;
}