About Point on Curve

You can create a point on a curve in 3D and for each 2D projection on the images. These points make the drawing stage easier. When that kind of points are placed at curve's extremities, the curve is called a floating curve. Floating curves can help improving surface quality.

This page discusses:

General Information

The creation of a point on a curve is possible using Create Point on Image from the Reconstruction section of the action bar.

Important: The curve on which the point is placed must be already reconstructed in the 3D model.

A point on curve is always created in all the corresponding 2D curves and also in the 3D model. This type of points cannot be used into a planar constraint or to define a symmetry.

Curved-based points are represented differently from the classical points.

The position of the point can be moved along the curve. The process is to select the point and slide it along the curve to the desired position.

Floating Curves

Points on curve can be used as the first and the last point of a curve. This type of curves, based on two points on curve, is called a floating curve. A Floating curve is involved in surfaces creation as any other curve. As an example, it can be set as surface boundary when possible.

The creation of a floating curve is possible using the following commands:

  • Edge Snapping
  • Manual Control Points
  • Polylines
Note: You cannot create a curve from a classic point on one side and a point on curve on the other side. Both points must be from the same type: classic or curved-based.

Compatibility

The following table indicates which commands can be used with points on curve and the floating curves.

Commands Compatible with Points on Curve Compatible with Floating Curve
Tangent
Symmetry
Tangent Constraint
Perpendicular Constraint
Planar Constraint
Calibrate 3D
Position the 3D
Update

Deletion Process

When you delete a point on curve, it deletes automatically all the floating curves linked to the deleted point.