[Obsolete] Catmull-Rom Spline

fredo6

Edit 19 Oct 08: I released a comprehensive version of BezierSpline,version 1.2, which includes this extension. It is advised to refere to the following post:
http://www.sketchucation.com/forums/scf/viewtopic.php?f=180&t=13563#p100509

Here is an extension to the BezierSpline plugin for drawing Catmull-Rom splines (in 3D).
You need to drop the two attached files (BZ__Catmull.rb and BZ_Catmull.png) in the BZ_Dir subfolder.

As for Cubic Bezier, this type of curve passes through all the control pointsand a move of a control point will only affect the shape of the curve locallyaround this control point (exactly the portion before and the two after).

Note that it can be 'nicely' closed by a Catmull spline, not by an approximate Bezier curve, as I do for other curves.

All this said, Cubic Bezier and Catmull splines are quite close, though Catmull seems to stay closer to the polygon of control points.

Below is a comparison:
Catmull vs. Cubic Bezier.jpg

PS: You probably noticed that the icon is mine!

to drop in the BZ_Dir subfolder

Burkhard

@unknownuser said:

PS: You probably noticed that the icon is mine!

Not for long, I'm sure

Nice one, thanks again Fredo

Matt666

Thank you Fredo6 !

CadFather

Thanks Fredo!

also here's me icon/s

and the whole set in case anyone finds it useful

24.zip

16.zip

Matt666

Hey ! Great icons ! Thank you CadFather !

There are still 2 icons :
Courbette Polyline divider

kwistenbiebel

Thank you
Much appreciated.

The surface tools really have become a wonderful toolpack.

marcosrodrigues

Thank you, Fredo. And Max, for the icons.

CadFather

@matt666 said:

There are still 2 icons

Thanks for that Matt!! will give it a shot this eve..

PS. it's actually pretty cool, i'll get more thanks than Fredo!

plot-paris

thanks, FREDO, FREDO, FREDO!!!

(and thanks CadFather for the icons)

pilou

@unknownuser said:

The surface tools really have become a wonderful toolpack.

These 2 new tools are surface tools?

Matt666

Bezier toolpack...

free agent

Thanx Fredo!!!

viga1978

thanks Fredo & Cadfather for icons

CadFather

@plot-paris said:

thanks, FREDO, FREDO, FREDO!!!
(and thanks CadFather for the icons)

well, here's the set with courbette - i think BZ_divider was already included (am i wrong?)

Fredo, i tried to add/rename the icons _24 or _16 but the toolbar does not update like TOS.
if it is something you can do in some spare time it would be great (though we can still keep 2 sets one of which we just drop in the BZ folder)

here they are:

BZ_16.rar

BZ_24.rar

pilou

Neat tools bar!