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Hans-Maarten Bais
 Hans-Maarten
Bais is a young Dutch naval architect who graduated just two
years ago from the Higher Institute of Technology in Haarlem, Netherlands. Since graduation he's been working at Diana Yacht Design, a firm
specializing in the design of super yachts. The firm works together with Jaron
Ginton (one of our earlier featured users), and it was through him
that Hans-Maarten was introduced to 3D computer design and MultiSurf. John
Letcher remembers him as a very enthusiastic but struggling beginner in
the training course he taught two years ago in Haarlem. "It's
exciting to see one of my former trainees who has turned into such a
productive and advanced MultiSurf user in this short time," says
John. Hans-Maarten has been using the program ever since and claims, "I
enjoy it
every time I use it."  Hans-Maarten has always enjoyed hand-drawing;
left is one of his
pre-MultiSurf drawings, and it shows the hand of an accomplished marine
artist (click on the thumbnail to see a full-size picture). MultiSurf has, to a great extent, come to
replace hand-drawing in his work: "I like the way I can visualize
my design
ideas in the 3D program," he says. "When I become
enthusiastic, I keep on modeling and adding components. I use MultiSurf throughout the design process:
During the first stage I calculate the weight using a comparable
MultiSurf model scaled to the leading dimensions of the new project. I use
subsurfaces to calculate plate areas, and contours to find the length and
center of gravity of construction parts."
 The 40m motor yacht (left),
built on a hull design by Jaron Ginton, is Hans-Maarten's most complex
design so far (more about the model at www.DianaYachtDesign.com/diana40m.htm). He describes the process: "I modeled every part in
MultiSurf and used almost every possible feature of the program creating some 3500 objects, 212 surfaces and 750 curves/snakes!
To organize such a huge model file and to make it accessible to other
users, I used numerous layers and kept dependency very low. For
example, a railing depends completely on just one absolute point and a projection
plane. All related points, curves and surfaces are connected to that one
absolute point. And, by saving the railing as a component, I can use it again
in another model: in my new project, I select an absolute point and import
the railing. I have found MultiSurf's component feature
very useful, and have created dozens of components, ranging from a simple
arc with its supports to a complete superstructure level including
wheelhouse windows. The relational characteristics of the components make
it easy to adapt them to a new environment. For instance, 
the windows
depend on intersection beads, and their dimensions may be changed easily by simply
moving a few points. Furthermore, the shape of their front only depends on
one curve, so the shape may be easily changed while the dimensions remain intact.
Spending time to create components really pays off!"
 A
new design at Diana Yacht Design still starts with a sketch. When the
hand-drawing is ready for further development, it is scanned and saved in
AutoCAD for reference. This helps in digitizing and creating a profile
drawing with the right dimensions. The CAD drawing can be imported
 into
MultiSurf where a detailed 3D model is created following the original
sketch. The pictures left (click on a thumbnail to see a larger image)
show the work progressing from the initial hand-sketch to a CAD drawing, a
3D MultiSurf model and to a photo realistic rendering.
 It
is such a pleasure to see MultiSurf used by this talented young naval
architect who knows how to combine traditional marine design principles
with the newest tools of the field to create such handsome designs. We
know that his next creation will be something to look forward to, and wish
him all the best in all his design endeavors.
Hans-Maarten Bais
Diana Yacht Design Int. BV
Engelandlaan 232
2034 NH Haarlem
Holland
http://www.DianaYachtDesign.com
hmb@dianayachtdesign.com
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