Menu : CURVE

Command: Change:Project

Shortcut : None

This command projects the target 3D B-spline or Bézier curve or curve set onto a surface. You may use the resulting 3D curves as projections for 3D building.

Before executing the command, the curve should be positioned on one side of the surface and the surface for the projection should be visible on the screen. After executing the command, you will be asked to select the surface by pointing and clicking with the left-hand mouse button and then to give the direction for the projection. The direction may be either x, y or z, or the current viewing direction. The command then projects the curve onto the nearest side of the surface. This is shown in the before and after pictures below.

The accuracy of the result depends on the shape of the curve(s) and the surface, and on the number and distribution of the control points on the curves. If the number of points in the curve are low, refining the curve with the CurveÞChange:Approximate command before projecting will improve the accuracy of the result.