Creating a Midship Section Using an X-Topology Surface

This tutorial goes through the process of creating a basic midship section of a ship.

1. Create a new file.

2. Change the view to (Y/Z) Stations.

3. From the create menu, create an X-Topology Curve, (Create -> X-Topology Curve).

4. Draw four control points in the basic 'U' shape of a ship section.

5. Once the curve has been drawn, select and edit the entity.

6. Select the two internal points.

7. Apply a Blended Segment constraint.

The curve should now interpolate the two internal points with straight segments on each side.

8. In the attributes panel, update the definition to create a ship section with breadth 20.0m, depth 12.5m and a bilge radius of 2.0m. The control point coordinates are shown below.

The ship section should now be accurately defined and look like the image below.

4. Rotate the view to show the ship section in a three dimensional view.

5. Finished editing the curve and make sure it is selected.

6. From the main toolbar, press the button to bring up the translate dialog. Create a copy of the midship section curve 10.0m forward of the original shape.

There should now be two similar curves in the view.

6. Create a X-Topology Curve and snap to the centreline point on the first curve.

7. Draw the curve and snap to the corresponding point on the second curve.

8. Repeat the process to connect the remaining control points together on both curves.

9. Once all six curves have been drawn, select all the curves by dragging a box around all curves or by pressing Ctrl+A.

10. Using the Right-Click menu, create an X-Topology Surface, (Right-Click -> Multiple Selection -> Create XTSurface Group).

11. Select the surface that has just been created.

12. Change the colour so that the specular shaded area will be visible when the surface is rendered.

13. View the surface with perspective, (Right-Click -> View -> Perspective). Render the surface.

The surface should now look similar to the image below.

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