View Full Version : Quick hull in Rhino


Polarity
03-01-2003, 10:33 AM
OK Here goes!
This sequence assumes some basic knowledge of Rhino - the Snaps, Ortho, curves etc. Almost all of the commands used here come from the standard bar on the left. A free evaluation of rhino is available here: http://www.rhino3d.com/download.htm - you get 25 saves and they dont want your age and shoe size before they let you download!

If you download now you will get V3 which is essentially the same but looks a little sexier!

NB: I am just a sailing Rhino addict with little design talent and only a very basic knowledge of the principals of yacht design (mostly picked up from this forum!) So my apologies if the hull in the tutorial looks to you like a bathtub ! (also sorry about the numerous speeling mistuks!)

The sequence we are going to go through is as follows:

plan deck shape and (in this case) straight transom
profile of bow and hull bottom
sheer line
max beam line
Rough surface
lines plan
editing and seam smoothing
lofting surface
hydrostatics

After this you can use the basics to form a transom and if enough people like this, the next stages are deck,cockpit, keel, rudder, mast, rigging, interior.....

The idea is a quick and dirty way to get a boat on screen using basic principals.
Let me have feedback! and if anyone want to add more text to the pics, or another pic pm me with it and I will add it to each message in the thread (let me know which pic!).

Have fun!

Paul

Polarity
03-01-2003, 10:34 AM
Plan and transom, First draw a line from 0,0,0 out to the right as a centerline! - Make sure your curves are snapped to this line (Near)

Polarity
03-01-2003, 10:42 AM
pic 2
"Lovely and smooth" is of course a highly technical naval engineering term....

Polarity
03-01-2003, 10:43 AM
pic 3
Lift the transom edge at the same time as the deck edge...

Note that the 0 Axis line is the waterline.

Polarity
03-01-2003, 10:45 AM
pic 4.5

Polarity
03-01-2003, 10:46 AM
pic 4.7

Polarity
03-01-2003, 10:48 AM
pic 5
Create a rough hull shape at the maximum beam and the transom - ignore the bit about the extra point we will deal with it differently...

Polarity
03-01-2003, 10:50 AM
pic 7

Polarity
03-01-2003, 10:51 AM
pic 12 (erratic numbering I know!)

Polarity
03-01-2003, 10:52 AM
pic 13

Polarity
03-01-2003, 10:52 AM
pic 14
This is a good way to get regular station lines, if you want to place them by hand dont bother with the array and project shown here, use "Extract isoparm" from the "curve from object" button, if it wants to extract the horizontal instead of the vertical change u to v or vice-versa in the command line. And make as many lines as you want.

Polarity
03-01-2003, 10:54 AM
pic 15

Polarity
03-01-2003, 10:55 AM
pic 16

Polarity
03-01-2003, 10:56 AM
pic 17

Polarity
03-01-2003, 10:57 AM
pic 17.3

Polarity
03-01-2003, 10:58 AM
pic 17.5
...smooth as a Mini's Bottom (http://www.oceanenergie.com/english/building.htm)

Polarity
03-01-2003, 10:59 AM
17.7
Whilts you are lofting you might find you need to change the position of the bottom to bow transition. This is easy - jut join the two split lines and re split with another point. Here I have changed it to the waterline.

Polarity
03-01-2003, 11:01 AM
pic 18

Polarity
03-01-2003, 11:03 AM
pic 19 ... hmm seems a little heavy !

Polarity
03-01-2003, 11:55 AM
lets make her a little shallower...

Polarity
03-01-2003, 11:56 AM
pic 21

Polarity
03-01-2003, 11:58 AM
pic 22
How to shed those unwanted tons...

Th.. th... thats all folks! for this series anyway!:)

ratrace2
02-09-2008, 11:49 AM
OK, Now add strakes, a chine plane, and flare the top at the bow.....:) :)

View Full Version : Quick hull in Rhino