public static Rhino.Commands.Result MoveGripObjects(Rhino.RhinoDoc doc)
{
// The following example demonstrates how to move a surface's grip objects.
// In this sample, all grips will be moved a fixed distance of 0.5 units
// in the normal direction of the surface at that grip location.
Rhino.DocObjects.ObjRef objRef;
Rhino.Commands.Result rc = Rhino.Input.RhinoGet.GetOneObject("Select surface for control point editing", false, Rhino.DocObjects.ObjectType.Surface, out objRef);
if (rc != Rhino.Commands.Result.Success)
{
return(rc);
}
Rhino.DocObjects.RhinoObject obj = objRef.Object();
if (null == obj)
{
return(Rhino.Commands.Result.Failure);
}
Rhino.Geometry.Surface srf = objRef.Surface();
if (null == srf)
{
return(Rhino.Commands.Result.Failure);
}
// Make sure the object's grips are enabled
obj.GripsOn = true;
doc.Views.Redraw();
Rhino.DocObjects.GripObject[] grips = obj.GetGrips();
for (int i = 0; i < grips.Length; i++)
{
Rhino.DocObjects.GripObject grip = grips[i];
// Calculate the point on the surface closest to our test point,
// which is the grip's 3-D location (for this example).
double u, v;
if (srf.ClosestPoint(grip.CurrentLocation, out u, out v))
{
// Compute the surface normal at a point
Rhino.Geometry.Vector3d dir = srf.NormalAt(u, v);
dir.Unitize();
// Scale by our fixed distance
dir *= 0.5;
// Move the grip to a new location
grip.Move(dir);
}
}
// Altered grip positions on a RhinoObject are used to calculate an updated
// object that is added to the document.
doc.Objects.GripUpdate(obj, false);
doc.Views.Redraw();
return(Rhino.Commands.Result.Success);
}