Creating Projections

This task shows you how to create geometry by projecting one or more elements onto a support. The projection may be normal or along a direction.
You can project:

	a point onto a surface or wireframe support
	wireframe geometry onto a surface support
	any combination of points and wireframe onto a surface support.

Generally speaking, the projection operation has a derivative effect, meaning that there may be a continuity loss when projecting an element onto another. If the initial element presents a curvature continuity, the resulting projected element presents at least a tangency continuity. If the initial element presents a tangency continuity, the resulting projected element presents at least a point continuity.

Open the Projection1.CATPart document.

Click the Projection icon .

The Projection Definition dialog box appears.

Select the element to be Projected.

You can select several elements to be projected. In this case, the Projected field indicates: x elements

Select the Support element.

Use the combo to specify the direction type for the projection:

Normal: the projection is done normal to the support element.

Along a direction: you need to select a line to take its orientation as the translation direction or a plane to take its normal as the translation direction.

You can also specify the direction by means of X, Y, Z vector components by using the contextual menu on the Direction field.

Click OK to create the projection element.

The projection (identified as Project.xxx) is added to the specification tree.

Whenever several projections are possible, you can select the Nearest Solution check box to keep the nearest projection.

The following capabilities are available: Stacking Commands and Selecting Using Multi-Output.

Multi-selection is available. Refer to Editing a List of Elements to find out how to display and manage the list of selected elements.