RVector RSnapGrid::snap(const RVector& position, RGraphicsView& view, double range) {
Q_UNUSED(range);
RGrid* grid = view.getGrid();
if (grid==NULL) {
RVector ret = position;
ret.valid = false;
return ret;
}
lastSnap = grid->snapToGrid(position);
return lastSnap;
}
RVector RRestrictOrthogonal::restrictSnap(const RVector& position, const RVector& relativeZero) {
RVector ret;
RVector retX;
RVector retY;
if (documentInterface==NULL) {
return ret;
}
RGraphicsView* view = documentInterface->getLastKnownViewWithFocus();
if (view==NULL) {
return ret;
}
ROrthoGrid* grid = dynamic_cast<ROrthoGrid*>(view->getGrid());
if (grid!=NULL && grid->isIsometric()) {
double d1, d2;
double a1, a2;
switch (grid->getProjection()) {
default:
case RS::IsoTop:
a1 = RMath::deg2rad(30);
a2 = RMath::deg2rad(150);
// d1 = x / cos(30):
d1 = (position.x - relativeZero.x) / (sqrt(3.0)/2);
d2 = -d1;
break;
case RS::IsoLeft:
a1 = RMath::deg2rad(150);
a2 = RMath::deg2rad(90);
d1 = (position.x - relativeZero.x) / (-sqrt(3.0)/2);
d2 = (position.y - relativeZero.y);
break;
case RS::IsoRight:
a1 = RMath::deg2rad(30);
a2 = RMath::deg2rad(90);
d1 = (position.x - relativeZero.x) / (sqrt(3.0)/2);
d2 = (position.y - relativeZero.y);
break;
}
retX = relativeZero + RVector::createPolar(d1, a1);
retY = relativeZero + RVector::createPolar(d2, a2);
}
else {
retX = RVector(relativeZero.x, position.y);
retY = RVector(position.x, relativeZero.y);
}
switch (mode) {
case RRestrictOrthogonal::Vertical:
ret = retX;
break;
case RRestrictOrthogonal::Horizonal:
ret = retY;
break;
case RRestrictOrthogonal::Orthogonal:
if (retX.getDistanceTo(position) > retY.getDistanceTo(position)) {
ret = retY;
}
else {
ret = retX;
}
break;
}
lastSnap = ret;
return ret;
}