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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Knot Vector in NURBS Curve (PYTHON)

I have been trying to convert Bezier to NURBS (Converting Bezier to NURBS Curve). But by clicking the Set Spline Type menu, there is no curve created. So thought of doing it through python. But the ...
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40 views

Converting Bezier to NURBS Curve

I was trying to convert a Bezier curve to a NURBS curve by clicking Curve->Set Spline Type->NURBS. But after the conversion to NURBS, the curve disappears. Is there any way to preserve the ...
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31 views

How do I add a loop cut to a NURBS surface?

The only way I have found to add a Loop Cut to a NURBS surface is to select an entire strip of faces and then using Subdivide. This is sub-optimal for two reasons: if I don't select the entire strip ...
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2answers
94 views

How to fill face with NURBS curve?

I'm trying to close a NURBS shape with the F key. It closes the shape (the control points), but does not fill the face. The editor is set to view objects in Solid Mode and X-Ray is disabled. I'm ...
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101 views

Create surface from a curve (and from control points)

I'd like to make 3D balloon shapes: The outlines will be given (for example as planar Bézier curves). And maybe one or a few points on the surface in the middle are given in order to dictate the ...
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Parametizing parabolic nurbs surface

Wireframe of nurbs selected, default z-surface parabola underneath How to model an accurate parabolic mirror with a known focal point? Animating z surface math functions Reminded me of an afterthought ...
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1answer
69 views

Surface material properties on geometry level

I am very new to 3D surface/object design and rendering. My goal is to generate image data for testing computer vision algorithms. I want to simulate/render a painted surface which is not completely ...
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104 views

How to see 'Edit points' on the NURBS curve in Blender? (Equivalent to 'Edit Points' of 'CV Curve Tool' in Maya.)

Blender: Maya: How do I make these points visible? I see the control points and the hulls but not the edit points which normally stay on the line of the NURBS curve. For those who have never used ...
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2answers
57 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 ...
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How to close a NURBS cylinder?

I encountered the same problem as described here :http://forums.cgsociety.org/t/how-do-you-close-a-nurbs-surface/1438485 I can't close the two extremities of a NURBS cylinder. Is it possible ? Thanks ...
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92 views

Merging nurbs sphere with cylinder [duplicate]

I want to merge the nurbs sphere with a cylinder as shown in the image below. I am a bit new to blender and very unsure how to go about doing it. The way I learnt to merge two objects is with ctrl + j ...
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27 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 ...
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64 views

NURBS surface to mesh logic in blender source

I'm trying to dig into the logic of "Convert to mesh from Curve/Surf" functionality in Blender but unable to pinpoint the exact source file where this logic is taking place. In my walk ...
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25 views

how to bevel curve without problems?

i want to make curved surface , so i add a Nurbs path and play with it to have the curve profile that i want to bevel it with Nurbs curve , the proble is start to overlapping and make some sort of ...
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1answer
39 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. ...
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2answers
57 views

Surface Edges Appear Beveled

I extruded a curve and the result has the right geometry but the shadows appear wrongly on the flat surface. How/what do I have to adjust to correct it? I already checked for duplicate vertices.
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52 views

Changing the shape of a Nurbs Path that's already animated

I don't think I asked my question to its fullest earlier. I have a NurbsPath animation. The tube NurbsPath shape wraps around the cylinder. Is there a way to alter the shape of this object (NurbsPath) ...
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25 views

create 2D surface which exactly covers given irregular surface

I want to make a 2D surface which exactly follows the undulations of another surface. If the given surface looks like the attached one; how can I create another surface which exactly covers it without ...
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Camera not staying on nurbs path

my camera won't stay exactly on the nurbs path (there's a small space between them) and then it randomly jumps onto it near the end. I've checked for any rogue keyframes, cleaned keyframes and made ...
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196 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, ...
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165 views

Curvature combs/ curve and surface evaluation tools

I have just started learning about blender and came from the world of Alias Auto Studio. As I try to play with the Nurbs curve tools, I couldn’t find any tools to help evaluate curve and connection ...
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100 views

Object dissappearing when rotating

I m new to Blender and I am using Blender 2.8 My problem is that after an operation where I loft a Nurbs circle along a NURBS path using bevel and applied a subsequent taper using a second NURBS cirle ...
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102 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!
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2answers
519 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 -> ...
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363 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 ...
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1answer
460 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 ...
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1k 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....
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1answer
456 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'...
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237 views

How to make a Morph Object follow the surface of a model

I'm trying to create a character with admittedly unorthodox eyes and pupils. What I'm attempting to do is make the pupils in 3D and them change their shape using morph targets, a little like the 3D ...
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1answer
616 views

Drawing a nurbs curve along a surface

I think I've asked this question once before, but I am not sure if anyone out there has an answer. My question is, is there away that I could draw a Nurbs Curve right along a surface? As in the Nurbs ...
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1answer
2k views

Particles don't follow curve

I'm trying to create a traffic simulation with the particle system. I want to create a lot of cars that walk along a path...I'm just following this tutorial : The problem is that when I setup the ...
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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 ...
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1answer
220 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 ...
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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 ...
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2answers
251 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 ...
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72 views

Convert a Normal Curve to NURB with less control points/Curve points

I have a Human spine cross section image and I am trying to develop it's 2D surface model in blender as I feel its more flexible than CAD design software( Solid Works, Solid Edge etc). I have data ...
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188 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 ...
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1answer
1k views

How to remove lines from wireframe...?

I made a surface and added a wireframe modifier on top of that. I want to remove just horizontal lines from the mesh. How can I do that..? Please help. I have highlighted it in the picture below.
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1answer
480 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 :)
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430 views

Joining Nurbs Circles?

I was trying to do this simple tutorial but when I tried to join the circles these just smashed into one and I can't even move them along the z axys. Thanks in advance!. EDIT: Adding de blend file, ...
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1answer
500 views

Distorted mesh when I use a bevel object on Nurbs curve vs. Bezier curve

I have a series of objects that I have procedurally generated use Bezier or Nurbs curves for which I then attached a Bevel and Taper object. When I use a Bezier curve the objects come out correctly. ...
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277 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 ...
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1answer
1k views

How do I select Edges?

I apologize in advance for asking such a beginners question, and I assume this will come down to my view/window being wrong. I used Blender a few years back, and I am familiar with how shapes work ...
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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/
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1answer
527 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 ...
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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 ...
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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 ...
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38 views

Bend object with curves modifier [duplicate]

I'm trying to make Wheat How to bend this object without affecting target size? When I add this Object in Curve modifier with NurbsPath in object section my object changes sizes and moves, looking ...
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3answers
13k 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 ...
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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?