PickContext is needed to set a RhinoView before using .But for a viewport in a wpf application using Rhino.Inside, the ParentView property is Null. I use ActiveView to replace it . But another problem comes up. When the viewport is parallel , it works. When the viewport is perspective , the pickcontext dosent work correctly when magnify the viewport . Here is my code, “Viewport.Magnify(magnificationFactor, false)” is to keep the camera length. Once I do so, it work incorrectly.
protected override void OnMouseWheel(MouseEventArgs e)
{
if (HostUtils.RunningInRhino)
{
double magnificationFactor = 1.0 / ViewSettings.ZoomScale;
magnificationFactor *= magnificationFactor;
magnificationFactor *= (e.Delta < 0) ? -1.0 : 1.0;
if (magnificationFactor < 0.0)
{
magnificationFactor = -1.0 / magnificationFactor;
}
Viewport.Magnify(magnificationFactor, true);
}
Refresh();
}
{
PickStyle = PickStyle.PointPick,
PickLine = frustumLine,
View = RhinoDoc.ActiveDoc.Views.ActiveView,
PickMode = PickMode.Shaded
})
{
var pickTransform = vp.GetPickTransform(e.Location);
pick.SetPickTransform(pickTransform);
}
It works correctly in parallel view.
