hein
1
How many shapers out there know what that is?
Here’s a link if you are interested…
http://www.cs.mtu.edu/~shene/COURSES/cs3621/NOTES/curves/continuity.html
In my previous life as a water molecule, I found
that running along a C2 surface was much easier.
-Hein
hein
2
This is a much better explanation
and relates mostly to rocker and
outline curves.
http://www.coe.org/newsnet/may04/knowledge.cfm
-Hein
mtb
3
I may be wrong, but doesn’t the “coe” discussion represent a subset of the “mtu” discussion? (…and hence one might expect would be easier to follow)
hein
4
You are right, MTB
I’m familiar with C2 continuity from my CAD background.
The “mtu” discussion is a bit heavy so I kept looking
for a better explanation after I saw my post got some
views but no replies. Too brainy for Monday morning I
presume.
I thought the “coe” discussion would help.
Thanks for noticing.
-Hein
moai
5
Since you’re familiar with C2 from CAD, you might also realize you can have to surfaces that are extremely close but one of them has a discontinuity.
the way shaping and glassing works could very easily render the design effort to satisfy C2 continuity useless.
not to mention that sometimes you need a discontinuity (to release water flow).
I’m and Industrial designer, and I’ve played with C2 surfaces for a long time, I really don’t think it’s worth the effort here.
d
hein
6
noboby cares about C2?
that’s a shame,
since water molecules do.
-Hein
hein
7
What about ASP3000?
Does it have the ability to maintain C2?
-Hein
daddio
8
Hein, how about a sixer of Budweiser to take out the night watchman, then you and me pull a “splash” mold off this surface?
the 100 incher at Mt. Wilson Observatory…
Sleep tight.

hein
10
C2 is not just about surface finish smoothness.
Good C2 means that the change in curvature
is smooth and gradual as you move along a curve.
Here’s an example of two virtually identical
rocker curves for skim board:

Notice how the curvature in the top image undulates
and in the second computer optimized rocker it’s nice
and smooth.
Now if I were a water molecule, I would find it much
easier to flow along the second rocker.
-Hein
High end computer aided surfacing can make a difference.
kenz
11
Shape3D has this. Check out the demo:
shape3d.com