public void GrabUsingMouse(
Point screenSpaceClick,
bool allowMultigrab,
double limit = 0.2
)
{
var selectables = GetSceneSelectables();
if (selectables.Count == 0)
{
return;
}
ISceneSelectable closestObject = null;
var closestDistance = double.MaxValue;
foreach (var selectable in selectables)
{
var screenSpacePosition = ActiveRenderer
.GetStandardScreenSpacePosition(selectable.WorldPosition);
if (!screenSpacePosition.HasValue)
{
continue;
}
var candidateLength =
(screenSpacePosition.Value - screenSpaceClick).Length;
if (candidateLength >= closestDistance)
{
continue;
}
closestObject = selectable;
closestDistance = candidateLength;
}
if (closestObject == null || closestDistance > limit)
{
return;
}
if (allowMultigrab)
{
_scene.ToggleObjectGrab(closestObject);
}
else
{
_scene.SetObjectGrab(closestObject);
}
}
public void GrabNearestPoint(bool allowMultigrab, double limit = 1.0)
{
var selectables = GetSceneSelectables();
ISceneSelectable closestSelectable = null;
var closestDistance = double.MaxValue;
foreach (var t in selectables)
{
if (t.IsGrabbed && allowMultigrab)
{
continue;
}
var candidateDistance =
(t.Position - _scene.Manipulator.Position).Length;
if (candidateDistance >= closestDistance)
{
continue;
}
closestSelectable = t;
closestDistance = candidateDistance;
}
if (closestSelectable == null || closestDistance > limit)
{
return;
}
if (allowMultigrab)
{
_scene.ToggleObjectGrab(closestSelectable);
}
else
{
_scene.SetObjectGrab(closestSelectable);
}
}
