11. Hull for a boat (Example 1)

This exercise is designed to compare three methods of making a boat hull from the same set of curves. You will see differences depending on the method used because the surface is not skinned the same way; the first hull is the most rounded and the third one is the least.
1rst method: Hull	2nd method: Coons	3rd method: Ruled Surface

Boat Hull 1 (1rst method: Hull)

Þ Step 1: Construction drawing

q Tool: Drawing tool, Interpolated Curve q Do it: Draw 3 NURBS curves, each on a different plane: Each curve must have a null dimension (x or y or z = 0) and each one must line on a plane: x,y (z=0), x,z (y=0) & y,z (x=0) These curves make a closed shape. q See the detailed explanations in the chapter: User Manual/Tools/Construction/Drawing/ Interpolated Curve

Þ Step 2: Surface generation

q Tool: Hull q Open the model file: Hull1 q Do it: 1. The example model looks like a half boat hull. 2. With the Hull tool, click first on the vertical curve, then on the two others. A mesh is generated. q See the detailed explanations in the chapter: User Manual/Tools/Construction/Surfaces/Hull Tool

Þ Step 3: Mirror the mesh

q Tool: Mirror 3D q Do it: Mirror the object from the vertical axis. The result is something that looks like a boat hull. q See the detailed explanations in the chapter: User Manual/Tools/Assembly/Symmetry

Boat Hull 1 (2nd method: Coons)

Þ Step 1: Surface generation

q Tool: Hull, Coons q Open the model file: Hull1 q Do it: From the same curves and selecting them in the same order as shown above, but with the Coons Hull tool, the result is a half hull also, but it is less rounded. q See the detailed explanations in the chapter: User Manual/Tools/Construction/Surfaces/Coons Surfaces

Þ Step 2: Mirror the mesh

q Tool: Mirror 3D q Do it: Mirror the object from the vertical axis. The result is something that resembles a boat hull. q See the detailed explanations in the chapter: User Manual/Tools/Assembly/Symmetry

Boat Hull 1 (3rd method: Ruled Surface)

Þ Step 1: Surface generation

q Tool: Ruled Surface q Open the model file: Hull1 q Do it: Using only the two horizontal curves, and clicking the two ends not joined (delete the vertical curve), we still get a half hull, but tighter than with the two previous methods. q See the detailed explanations in the chapter: User Manual/Tools/Construction/Ruled Surface

Þ Step 2: Mirror the mesh

q Tool: Mirror 3D q Do it: Mirror the object from the vertical axis. The result is something that resembles a boat hull. q See the detailed explanations in the chapter: User Manual/Tools/Assembly/Symmetry