Navigation:  Sections > Using Real Time Sections

Orca3D can compute and draw the sections in real-time as a surface is modified. This is only true if you are using Orca Control Points, rather than Rhino's standard control points.

The first step is to define sections. After that, simply use the Orca Control Points when editing the surface(s).

 

Orca Control Points

1. Start the command from the toolbar, menu, or command line.

2. Select the surface(s) you wish to edit, and hit Enter.

3. The control points for the surface(s) will be shown. Orca control points, and the lines that connect them, are drawn differently than the standard Rhino control points. You may control the color of the lines in the control polygon in the Orca Properties dialog (). By default, control lines in the U direction (longitudinal, in general) are drawn in cyan, and the V direction (transverse, in general) are drawn in green.

4. Move the control points just as you would the Rhino control points. If you have defined Orca Sections, they will update in real-time (remember that the smoothness of the real-time curves is controlled by the smoothness of the Orca Mesh, which can be adjusted in Orca Properties). If you have checked the Real-Time Hydrostatics box in the Define Design Condition dialog, you will also see a window showing the hydrostatics data updating.