? Bezier Nurbs ?

[Grey]

Bezier Nurbs is basically a nurbs patch, but I haven't figured out any of it's functions other than manually manipulating points...

[kiwi]

Bezier nurbs make excellent landscapes.Just set to about 13 x 13 {points} and pull up some ridges and grooves,then make editable and add some more etc.Only down side you cant see the points as being active in the other view windows :)



Stu.

[LucentDreams]

well you should have bought it from the german office as there is german dcumentation ;)

[ndat]

Here is the link to all the online doccumentation stuff... Its in German :) http://www.maxon.net/pages/download/download_documentation_d.html

[neilyb]

Sind Sie Deutsch?
Vielleicht nicht?

But if you are you can send back the manuals (to Maxon)and have them swapped for the right version, providing they are in good condition.

Wenn Sie die buch zurück zum Maxon Schicken, dann bekommt mann die richtige spache! (wenn die buchen nicht beschädigt sind?) Ruf Maxon erst!

Sorry für meine Deutsch!

[dirtySanchez]

They also make pretty cool nose cones...

DS

[dirtySanchez]

Originally posted by kiwi
Only down side you cant see the points as being active in the other view windows


You can if you change the display type to wireframe (from say, Isoparm)

cheers. DS

[kiwi]

Doh! :hmm: I have never thought of doing that good idea.



Stu.

[alienNash_gt]

Hi :beer:
Well i do not speak German by the Way I am Arabian.
Ok, I do not see deference in between regular { plane }[from the object menu ] and Bezier Nurbs I can do any thing you showed me using Plan object , make it editable and chose what ever I want to make.
Sorry guys if I made it longer.
Thanks

[kiwi]

No dont make it editable until you have the shape you want....select a point and pull on it and it will bend like a nurbs surface and arc instead of crease etc :)



Stu.

[Erik Heyninck]

Some background info: from the very start of computer work, the industry needed a universally accepted way to define curves. This was done by using mathematical formulae with parameters. (2x+3y=10 is a formula, 2, 3 and 10 are called the parameters) This mathematical way of representing curves is called "vector" in 2D apps. In fact, only a few points and the formula that tells how the curve is defined have to be remembered. One advantage of this is that any vector-based curve can be enlarged or made smaller without becoming pixelated.
Bézier curves have a specific property: they can have none, one or two levers or handles that allow you to change the curve at a given point. You can make these handles longer and shorter, and you can also change the angle at which they are placed. This allows you to make very precise curves. 2D Apps like Xara, Freehand, Illustrator and CorelDRAW work with these.
In 3D, a completely different terminology has to be learned. This is one of the things that make 3D rather difficult at the beginning. I don't always understand the exact meanings of all these words, but I interpret Spline as a shorter way of saying "SPecial LINE". In computer graphics, a spline is a curve that connects two or more specific points, or that is defined by two or more points. The term can also refer to the mathematical equation that defines such a curve. Nurbs is also shorthand for something even more complicated. (Non Universal Resource B-Spline :buttrock: )
Splines (vectors) cannot be seen. What we see on the monitor is a representation of them. The "points" I talked about are called "vertices" in 3D world. (singular: vertex).
So Cinema4D (three dimensions plus time) says that a spline (a vector in 3D space) is built up of vertices (points) that are connected by parametric formulae. You don't have to do the math, although under formula in the objects menu, you can fill in your own formula.
A Bézier curve in Cinema goes through all the vertices (points) you defined. A B-spline for example doesn't.

In Cinema, it is best to change to a flat view (XY, XZ or YZ) depending on where you want this curve to be. Now when you click on the Bézier Spline icon, you are automatically in Point Edit Mode.
When you click in the viewport, a point(=vertex) will appear. When you click somewhere else, both points are united by a curved line that is dependant on the handles. (see examples in the manual). When you click agai on the first vertex (point) you set, the curve is closed. If you have drawn a curve with Bézier, you can always change it by changing the handles. With other curves, this is far more difficult to do, or even impossible.

-In case you want to change the handles independantly from one-another, use shift while you drag one handle.
-In case you want to see your curve, right-click on it (I suppose that's Cmd+click on Mac?).
-You can double click on a vertex (point) to get a dialog window that allows you to set precise info.

Don't hesitate to ask if things are not clear, and for the more experienced users: don't hesitate to correct me or add info.

[Grey]

Erik Heyninck, this is the reason I couldn't go so often to the RHINO Newsgroup... people got into these explanations wich I couldn't fathom :bounce:

Even so... I understand most of what you're saying.

It is nice to have someone around who understands these things :applause:

[Erik Heyninck]

Yeah...wish my modelling was as good as my "understanding" of how things work. I *need* to understand what I'm doing before I can see what can be done. I've been stuck at this basic level for weeks and weeks because me too I feel that the Cinema manuals are badly written, and the tutorials are not elementary enough. So while people who don't "understand" all this background theory dive into experimentation and get fascinating results, people like me can't get the engine going and try to re-invent the app to be able to start working. Ahhh...humans!!!

[alienNash_gt]

Hi. :beer:
Thank you a lot for Taking time to Write . I really appreciate people like you ,
SO up there I said I could not understand the manual well cause it is not my language :) , and now I see I miss-explained what I am asking for . Ok Bezier nurbs (the curves you drew as you kindly explained ). I already know how to use ( I wonder how stupid did you think I am to ask about them ), but I meant the other Bezier nurbs ( could not they find another name or what?) , the one I am confused with is from the menu[ object->NURBS->Bezier NURBS ] , I know how to use the rest within this menu but this one [Bezier NURBS] I do not , and the only use I do use it for is to manubilate it as if it were a plane , and I guess there must be a good reason for having it , come on C4D is not Microsoft product to have a lot of useless features :) , Thank you Again.

[Per-Anders]

I'm afraid that no seriously this is what they are for. It's just a Bezier Plane. C4D doesn't really have all that great Nurbs capabilities, and really with the release of V8 looming it's time to put these things behind us for the most part as SUBD weighted modelling will be able to do this only with much more control. This is the only nurbs object in C4D that gives you access to the Hulls and Nurbs control points (unless you count Bezier curves as nurbs objects). It's useful for mechanical objects, rolling landscapes, car wings, bonnets etc... personally i would rather use HyperNURBS any day of the year... but i guess it may be a lagacy thing... or perhaps one of those dead ends that people go down thinking that at some point C4D would have full Nurbs modelling... but never got round to implementing it fully.

[Erik Heyninck]

There is no such thing as being stupid, and in fact, it was I who did not read your question well.
When I want to use the Bezier nurbs, I usually go to allviews (F5). When you click on the B.N., you get a flat rectangle in the XY direction. Double clicking on the icon in the objects managers brings up a dialog box in which you can choose X and Y subdivisions, grid points and whether these are closed or not.
When in points mode, you can easily make cloth and folds with Bezier Nurbs. When you select closed, you can make envelopes etc. Just click on a point and drag it in 3D view.
By adding grid points, you get more points to drag, by adding subdivisions, your shape renders more fluently.
The attached image may show you more tha all my words:

[Erik Heyninck]

A typical use is to make a deforming mirror:

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