PointsOn

Displays control points or polygon mesh vertices.

Steps:

• Select objects.

Notes

• When you control-point edit curves that are smooth and consist of several curve segments joined together, the curve will fuse into a single curve that cannot be exploded. If necessary you can use the Split command with the Point option and Knot object snap to break the curve into segments.

• To ensure the seams of polysurfaces do not accidentally crack open, polysurface control points cannot be turned on. To control-point edit a polysurface, Explode the object into separate surfaces first or use the ExtractSrf command to separate the surfaces you want to edit.

PointsOff

Turns off control point and edit points display.

PtOffSelected

Turns off control points and edit points for selected objects.

EditPtOn

Displays points on the curve evaluated at knot averages.

Edit points are like control points except they are always located on the curve and moving one edit point generally changes the shape of the entire curve (moving one control point only changes the shape of the curve in a sub region). Edit points are most useful when you need a point on the interior of a curve to pass exactly through a certain location. Control point editing is preferred when you need to change the look of a curve and maintaining "fairness" is important.

Steps:

• Select curves.

Note: The edit points in Rhino are points on the curve evaluated at knot averages. They are not knots themselves.

CullControlPolygon

Toggles the display of surface or mesh control points so that only points on the side of the surface that face the camera are displayed. For open surfaces the normal direction of the surface will determine which points are visible to the camera.

This can make it easier to edit surface control points.

Options

Cull

No

Yes

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