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Questions tagged [nurbs-surface]

A NURBS Surface is a mathematical model representing a surface. Use this tag for any questions pertaining to the "Surface" Object type in blender.

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15
votes
1answer
1k views

Automatically draw hidden portions of paths with dashed lines

This is a follow up to a question of mine on TeX stackexchange site. Is it possible in blender to have an open surface that would render as opaque but the render would show automatically, depending ...
12
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3answers
16k views

Lofting between Splines

I’ve seen some C4D users use a tool called Loft-NURBS it seemed like a good way to speed up my workflow. Is there a tool in Blender to create a surface from ...
8
votes
2answers
5k views

What are surfaces and metaballs used for?

I use very often meshes and curves, because I know what they are used for (meshes for renders and curves for follow curves). But I actually don't use surfaces and metaballs. What are surfaces and ...
8
votes
2answers
5k views

Create NURBS surface with Python

How can I write a script to create a NURBS surface with given control points? I did find a helpful piece of source code that got me here: ...
7
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2answers
2k views

How to extract side-view outline (e.g. top view) of a 3D object to 2D surface?

I want to make some 2D version of 3D particles. I used to shrinkWrap the 3D mesh to a plan, and draw NURBS curve manually along the boundary. However it is too time-consuming! Is there any easy way ...
5
votes
2answers
1k views

Why do I get large bevels on a curve with such a small bevel object?

I am bevelling a simple circle with another simple circle and as you can see from the screen shot below I have to make the bevel circle incredibly small and I still end up with a very large cross ...
5
votes
1answer
5k views

Why can I not use the Make Segments command on my Surface NURBS Curves?

I followed the tutorial on the Modeling/Surfaces/Skinning wiki page, and then I created a simple test. I created a Surface NURBS curve, made 3 copies with space between them, selected all, and hit F, ...
5
votes
1answer
3k views

How can I add control points to a NURBS surface

How can I add control points to the default 16 control points of a NURBS surface?
4
votes
2answers
464 views

Why does cloth simulation not work on a NURBS sphere which has been converted to a mesh?

I have created two spheres: A UV sphere with 48 segments and 24 rings A NURBS sphere, which I converted to a mesh using Object -> ...
4
votes
1answer
768 views

Rounded wireframe with big cells

I'm pretty new to Blender and I'm trying to create a perfectly round NURBS sphere. I need a wireframe of this sphere with big cells (like on the image below) but I also need curved (sic!) not straight ...
4
votes
1answer
1k views

NURBS trimming, blend surfaces

I'm exploring Blender's NURBS functionality. So far, I've been able to define two curves and create a NURBS surface between them. Does Blender support more advanced NURBS features like trimming and ...
4
votes
3answers
1k views

NURBS surface from branching curves?

I'm looking for a way to do something very similar to the technique using the skin modifier, but with NURBS. In other words, I'm looking for a way to do something similar to a convex hull, but not ...
4
votes
1answer
2k views

Export/list the control points of a NURBS

30 minutes ago, I launched blender for the first time. I'm rather overwhelmed by the options, so I dare to ask this novice question. I'd like to export the control ...
4
votes
1answer
2k views

Convert imported SVG shape to Bézier/NURBS surface

I have a closed Bézier curve created in Illustrator which I've imported into Blender via SVG. I don't want to extrude it, but rather make it a filled surface (at the moment it's just a path) which I ...
3
votes
3answers
674 views

Aligning tangents in connecting NURBS-curves

I want to smoothly connect two NURBS-curves. To that purpose, how can I align their common vertex tangents? Right now, they're at an angle (see picture). I could do it manually (on sight), put that ...
3
votes
3answers
12k views

how can I make a mesh from curves?

I'm trying to mesh a rear wing of a vintage car. I've done some Bezier curves and converted them into mesh. I have the same amount of vertices, so I should be able to connect everything together but I ...
3
votes
1answer
240 views

Surface cannot be created with nurbs curves by pressing F key [duplicate]

I followed several tutorial to create a nurbs curve, and duplicate it in edit mode. Of course I pressed A key to select all points and F key to create surface. But there was no surface be created, a ...
3
votes
1answer
1k views

How to get a straight Nurbs

I have added a nurbs curve. Im extruding it in the L direction and i do not need that curve shape. On the red axis its going straight but when i turn to green axis it makes a curve. With the orange ...
2
votes
3answers
3k views

Can we smooth selected faces to make curved surface more precise?

Is there a way to smooth selected faces to make curved surface more precise? This kind of mathematical accuracy is of course easier achieved by using nurbs oriented workflow, but it could be handy to ...
2
votes
1answer
271 views

How to get rid of imperfections after applying subsurf?

I'm trying to model a simple sofa in blender but after I applied subdivision surface modifier i got that nasty gap. On the other side it looks good. here ^ is how it looks in edit mode, there are not ...
2
votes
2answers
1k views

How to bend nurbs surfaces

I modeled a simple flat square, adding thickness by extruding. Now I want the Surface to not be flat but a Kind of buldged. How do I accomplish that?
2
votes
1answer
50 views

Nurb Interface Tool question - lost my way

When I add a Nurbs curve now I get the wrong icon and no hairy catapillar. Whaa, What did I do?
2
votes
2answers
792 views

How to get world coordinates of a UV parameter on a NURBS Curve Surface?

I am looking for a solution to get the world x, y, z coordinates of a given UV parameter on a NURBS Curve Surface. The output should be a mathutils.Vector, or at ...
2
votes
1answer
69 views

How to bring 3d effect in surface?

Can anyone tell me how this surface looks like 3d which covers red sphere and blue cylinders. see the blend file here https://blend-exchange.giantcowfilms.com/b/3570/
2
votes
1answer
801 views

Mesh curve to Nurbs

I'm new here. I'm want ask you if there is the possibility to transform the curve that comes from subdivision surface (shown in the photo) in NURBS curve.
2
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0answers
773 views

why is my displacement map not sharp?

The displacement map is an animation of the letters being engraved in the metal. The animation itself works just fine. The only problem is the edges of the letters. How can i get them straight instead ...
2
votes
0answers
496 views

Create a Nurbs Circle Surface using python

I am trying to achieve the following post I see doing this two ways. Create a large circle and small circle and fill the inbetween. Perform the same steps as the GUI programmatically, create NURBS ...
1
vote
1answer
422 views

How can I make this surface in blender…?

How can I make a surface like this....? I made this using nurbs in maya. Please Help. Thank You :)
1
vote
2answers
1k views

how would you texture map a rope?

I would like to make a rope for a game object (so it should be fairly low poly). I know how to divide a cylinder into segments (K key with Z key) and form it around a nurbs path. for my game engine (...
1
vote
1answer
310 views

Curves: how to make circular shapes within curves

Is there a way to make a "perfect" circle with the points of my nurbs circle (the ones around the cursor)?. I tried "as sphere" and "bend angle", but the results are not very satisfactory. Ideally I'...
1
vote
2answers
231 views

How to make evenly spaced pillars for a roller coaster track?

I am a beginner in Blender. I am making a roller coaster and I want to put an array of stands under my roller coaster tracks. To do that, I used DupliFrame on my pillars, parented them to my NURBs ...
1
vote
2answers
778 views

Hard edges and curved surfaces

I'm quite new to Blender(and 3D graphics in general) and I can see that there is only 2 kinds of 3d surfaces, meshes and NURBS, meshes only have hard edges, while NURBS have only got curved surfaces, ...
1
vote
1answer
30 views

Curvy hard surface

I am running into a bit of a struggle here with a curved surface and was wondering if anyone could provide a tip to mode this. I highlighted the panel in green and the curved '' flow'' in orange. ...
1
vote
1answer
197 views

Sampling points of a nurbs surface using projections

I'm trying to sample a nurbs surface given certain constraints. Basically I'm trying to reproduce in 3D the following 2D situation. I don't know how to do this in 2D either so I need suggestions ...
1
vote
1answer
495 views

Conversion of fine organic surface mesh to a few patches of NURBS

Note: cross-posted in stackoverflow as well. Would this be OK? I have a very fine mesh (STL) of some organic shapes (e.g., a bone) and would like to convert it to a few patches of NURBS, which will ...
1
vote
2answers
74 views

Can't patch nurbs

Someone know why when i press F to patch between 2 nurbs curves it just connect the 2 spines instead of patch them? Thanks!
1
vote
1answer
363 views

Creating a smooth spherical surface

I am designing some parts for 3D printing and I have been banging my head for several days already trying to accomplish the following: I have a "frame" that looks like this: I am trying to create a ...
1
vote
2answers
650 views

Can't fit plane to nurbs path to create a race track

I'm new here and I'm making a racing track for Assetto Corsa. I don't know what's exactly happening, but something doesn't let me to apply a Curve modifier to a plane. I'll explain myself: to make the ...
1
vote
1answer
479 views

How can I subdivide a Surface NURB without affecting the shape?

Say, I lay down a Surface NURB Circle in Blender. It has 4 control points, and it is circular. Now, if I Subdivide it to add more control points, it starts to become a square. The more I subdivide ...
1
vote
1answer
444 views

Getting exactly circular/rounded NURBS corners

How can the weight of a NURBS curve/surface be calculated such that corners are exactly circular? It has something to do with the angle of the corner, but that doesn't seem to be displayed anywhere.
1
vote
1answer
233 views

Blender 3d NURBS Path objects move

I was trying to create train tracks using NURBS path and everything looks to be great till I press play. As soon as I play it in Blender Game Engine, the objects are no longer merged and have a clear ...
1
vote
2answers
22 views

NURBS convert to MESH and reverse operation

I encoutered the same problem asked by @Travis here, and I applied the solution proposed by @Moog. I tried thus to convert NURBS Sphere to MESH and delete Vertex, but when I tried to perform the ...
1
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0answers
23 views

How to turn off editing an object with NURBS [closed]

I'm trying to edit my object in edit mode, but it is slowing down my computer. I figured out that I turned on nurbs, but I'm not sure how I did that. Now I can't turn off nurbs to edit my object ...
1
vote
0answers
87 views

How to snap NURBS Surface Curve to vertex-es?

I've noticed strange difference between how snapping work for NURBS Curve's and NURBS Surface Curve's - for the second, it always snap to increment, even if different snap target is selected. I mean, ...
1
vote
0answers
262 views

How to get a 2D silhouette of a 3D mesh in Blender 2.8? [duplicate]

I would like to just take a 2D silhouette outline of a side of one of my 3D meshes. I located the question How to extract side-view outline (e.g. top view) of a 3D object to 2D surface? but since it ...
1
vote
0answers
845 views

Can we extract just the outside surface of a 3D model?

I am new to using Blender and wanted to know if this software can serve my purpose before jumping into using it. I have CT(Computed Tomography)-scanned an object and exported the mesh into a PLY file....
1
vote
0answers
162 views

Join multiple NURBS circles without collapsing circles/losing positions?

I'm trying to join and fill multiple NURBS circle surfaces (similar to the YouTube video here https://www.youtube.com/watch?v=_kGmh9r6pkE) but when I join my circles, they collapse into one circle, as ...
1
vote
0answers
272 views

Is it possible to have mesh with NURBS editable surface

I have a mesh that has flat top and bottom and I want to know if it's possible to edit the top and bottom just as if they were NURBS surfaces. I have an example cube and two NURBS surfaces: And I ...
1
vote
0answers
71 views

Q Automated surface generation?

I have a NURBS surface definitions (i.e. the control node positions) but want to automate the generation of the surface in Blender. Currently I generate a flat regular grid of control nodes by ...
1
vote
0answers
81 views

what does manifold mean in context of surface building [duplicate]

This question is different as I seek to know a particular context of this subject i.e. wrt 3d printing. It is important for me to know what this means. " So, projection onto the first coordinate ...