The following examples shows how a ShipLINES hull surface is generated and modified.The commands and operations used to generated Yachtlines surface are shown in more detail in the help.

The ShipLINES hull surface produced in this example can be downloaded here: shiplines.geo

When the hull surface is first shown, the surface is ungenerated and only the boundary curves are shown.

Turning on 'Interactive Update' allows the surface to update after each parameter change

The parameter lines do not always give a good indication of hull shape, turning on the hull contours gives a better appreciation of hull shape.

Adding a bulb to the surface.

An adjustment to the size of the bulge radius, from 2.05 to 1.0

Reducing the size of the radius of the deck near the stem, from 5.275 to 3.0

Reduction of the extent of the parallel middle body, from 40 -> 60 to 49 -> 51.

Adding curvature to the stem shape, from 15 to 80.

Adding curvature to the transom, from 50.0 to 100.0.

Now some adjustments to the skeg...

Increasing the radius near the propellor boss, from 0.332 to 0.6.

Pushing the root (gap above the boss) of the skeg forward, from 1.3 to 2.0.

Lowering the height of the boss, from 1.906 to 1.0.

Hydrostatics, illustrative waterplane and buoyancy centroid for the hull surface.