Curve

Sub-function

Description

Plane

Creates a curve or curves in surface or panel by intersection with plane.

Accept the prompt to select location, surface or panel and then select the intersecting planes and also give absolute coordinates.

Repetition Terms:

Curves can also be created using repetition terms. Syntax for repetition is <start> <step> <end> <optional offset> as illustrated below:

Grid Plane

Creates a curve or curves in the grid plane by intersection with surface, grid plane or plane.

Select the Grid Plane and then the intersecting element.

Points

Creates a knuckle or spline curve from selected points.

Prerequisite for this function is that necessary points are created either in a point world (in CRM) or locally in another element for example in a panel.

Accept the prompt to select points in order. By default, the function selects CRM points and creates a CRM curve. If instead a local curve is requested the mode is changed by using the drop-down function Curve at panel. Once accepted, a spline curve is created. If a polyline curve is requested, then the mode is changed by the drop-down function Polyline curve that must be selected prior to accepting the selected points.

General Cylinder

Creates a general cylinder curve from a number of points selected in order. Select location surface and then select points in order. Choose projection direction. By default, the view direction is used. To change it key in the projection vector, or rotate the view with the scroll-button on the mouse or use the Power Compass visible in the canvas.

Once accepted, the general cylinder curve is projected and created as a curve in the selected surface.

Surfaces

Creates a curve between two intersecting surfaces or panels.

Select two intersecting surfaces or panels and when accepted select the intersecting surface or panel. The first element that is selected defines the location of the curve to be created.

Offset

Creates an offset curve from the selected curve with given offset value and direction.

At start of the function there is a prompt to select a curve to give an offset value (with sign to get direction). A new curve is created referencing the selected curve.

Equal Girth

Creates an equal girth length curve from a selected curve.

Select a curve created in a surface and give an offset value (with sign to get direction). A new curve is created referencing the selected curve.

External Curve

Create a curve from a curve stored directly in a surface, for example boundary curves.

Prior to using this function, the external curves must be made available in the canvas. Pick the surface making it current element in the database tree browser. The external curves are stored below the element SRFCGR, which should be dragged into the canvas. The external curves are made available for selection by picking the surface again and using the in-canvas command IN.

The external curves are now possible to pick, and the function External Curve is ready to use. To get better visualization, the shading in canvas can be turned off by using the F11 key on the keyboard.

Select external curves and curves are created when accepted.