bool updateBrushAndCursorByIntersection (const ViewPointingEvent& e, bool useRecentOctree) {
WingedFaceIntersection intersection;
if (this->self->intersectsScene (e, intersection)) {
this->cursor.enable ();
this->cursor.position (intersection.position ());
if (e.primaryButton ()) {
this->brush.mesh (&intersection.mesh ());
if (useRecentOctree) {
Intersection octreeIntersection;
if (this->self->intersectsRecentOctree (e, octreeIntersection)) {
return this->brush.updatePointOfAction ( octreeIntersection.position ()
, octreeIntersection.normal () );
}
else {
return this->brush.updatePointOfAction ( intersection.position ()
, intersection.normal () );
}
}
else {
return this->brush.updatePointOfAction ( intersection.position ()
, intersection.normal () );
}
}
else {
return false;
}
}
else {
this->cursor.disable ();
return false;
}
}
bool initializeDraglikeStroke (const ViewPointingEvent& e, ToolUtilMovement& movement) {
if (e.primaryButton ()) {
WingedFaceIntersection intersection;
if (this->self->intersectsScene (e, intersection)) {
this->brush.mesh (&intersection.mesh ());
this->brush.setPointOfAction (intersection.position (), intersection.normal ());
this->cursor.disable ();
movement.resetPosition (intersection.position ());
return true;
}
else {
this->cursor.enable ();
this->brush.resetPointOfAction ();
return false;
}
}
else {
this->cursor.enable ();
this->brush.resetPointOfAction ();
return false;
}
}