Questions tagged [curves]

A Curve is an object that is expressed in terms of mathematical functions, rather than as a series of points such as vertices. Use this tag for any questions pertaining to the "Curve" Object type in blender.

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48
votes
1answer
4k views

Trace visualisation in 3D - how to wrap curves onto a 3D mesh

Dear Stack Exchange Community, i'm trying to achieve the following effect with curves: Source of this image is here: https://www.behance.net/gallery/57143191/Visualizing-Concepts-in-Houdini-...
35
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2answers
166k views

How can curves be converted to meshes?

Is is possible to remove the curves and only have the mesh of a tree that was created with the saplings add-on? I'd like to apply a decimate modifier to have a few low-poly trees, but this doesn't ...
33
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3answers
26k views

How can I convert an SVG to a mesh?

In Blender, extruding and beveling of SVG imported objects, works very well when they are still bezier objects, but the conversion of a SVG path to a mesh is very ugly, with a lot of unnecessary ...
31
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1answer
37k views

How can I duplicate a mesh along a curve?

I want to outline a curve in the form of text with a mesh (UV-sphere, cube etc.). How can I do that while saving mesh geometry without using the Curve modifier?
30
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3answers
45k views

Model a simple 3D spiral shape?

I need to model a simple spiral shape. I imagine the best way to do this is with curves, but I am unsure how to create a perfect spiral shape with curves. What's the best/easiest way to make a spiral ...
30
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2answers
73k views

Extrude along path

Is there a way to extrude an object or shape along a path/curve, so you get a solid object? For example, a rectangle shape along a curve to get a long bendy sidewalk. I feel this was in an older ...
29
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7answers
9k views

Organic yet accurate modeling with the golden spiral

Foreword First off, let me say that I am profoundly amazed at the orderliness in nature. If you haven't heard about the Fibonacci sequence (0, 1, 1, 2, 3, 5, 8, 13, ...), you should check it out. ...
28
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3answers
31k views

What is the fastest way to add vertices to a curve at a specific point?

For example, in inkscape you can double click to add a new control vertex: Is there a way to do that in Blender? The closest thing I have found so far is CtrlLMB, but it just adds an unconnected ...
28
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1answer
18k views

Can blender export 2D curves to svg?

Is it possible to convert/export 2D curves to an svg? I know you could render it to a raster image and then convert it with inkscape/potrace, but it would be nice ...
23
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4answers
18k views

How do I prevent object distortion when applying a curve modifier?

This is the profile of the object I'd like to wrap... Here is the object's profile after being wrapped... Is it possible to prevent the distortion? The following post here: http://blenderartists.org/...
21
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2answers
35k views

Make a 3D tube with a Bézier curve?

How can I make a Bézier curve into a 3D-noodle-like structure (like a tube)? When I try, it keeps turning out like a rectangle with corners.
20
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4answers
5k views

Convert Curves to Grease Pencil?

I'd like to know if there's a way/add-on to convert curves to Grease Pencil strokes? I know you can convert in the other direction, but I can't find anything to create Grease Pencil strokes from ...
19
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1answer
3k views

How to achieve this spline and particle effect

does someone have any idea of how to achieve the following effect in Blender? the source of this file is http://www.rawandrendered.com/camp-2016-titles I tried to apply curves to a deformed surface, ...
17
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3answers
9k views

How to cut an object along a curve?

I want to divide this model into separate pieces to prepare it for the next stage of a project. The divide needs to be made down a curved line (which I hope is visible in picture). , I figured out ...
16
votes
3answers
25k views

Adding a texture map to a beveled curve or path

I really want to be able to apply mapping to a curve object. For instance a rope or pipe that has a repeated pattern along its length that follows it's twists and turns. There must be a simple way to ...
16
votes
1answer
35k views

Repeating objects along a path

Is it possible to repeat my track object along a path? I tried using the method shown here Extrude along path using an array and then a curve modifier, but this happened when I added the curve ...
14
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3answers
7k views

How to animate A curve segment?

How can I animate the position of a Bézier curve segment as shown in the images below?
14
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1answer
2k views

How to model the curly cable part of the phone

Hello. I am a beginner in Blender. I started modeling this phone and when I got to the curly cable part it was a real challenge. Could someone guide me on this.
14
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4answers
5k views

Make a quarter curve with curves

What I want: What I have: So basically I need to use curves to make a quarter circle. What is a good trick to do that?
14
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1answer
5k views

How can I simplify or resample a Bezier curve?

When I use the Grease Pencil to draw out quick curves in the 3D Viewport, and then convert the pencil to a Bezier curve, the result is always consisting of very dense geometry and handles which are ...
14
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1answer
12k views

How to vary the thickness of a Bezier curve?

I have made a bezier tube and I want some parts of it to be large and others to be small. When I try to set the depth for one of its vertices, it just changes the depth for the whole object. Is there ...
13
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6answers
5k views

Complex extrusion howto

I want to extrude a profile (either a mesh or a curve) along a "guide" curve such that: Its local Z axis is and remains parallel to the global Z axis at every point of the extrusion Its X axis must ...
13
votes
1answer
5k views

Pipe with round caps (ends)?

I was trying to make a pipe with rounded cap or ends. Something like in the image, where I just added to spheres as "ends". I've already surfed the internet a little and it looks like an uncovered ...
13
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2answers
1k views

How to colour vertices of a beveled curve mesh without converting to mesh?

For scientific visualisation, I'm using a lot of splines which are bevelled with an object (i.e. a hexagon). I control the level of details depending on the context. Without losing the benefits of ...
12
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2answers
689 views

Modeling a twisty tree: How do I twist a beveled curve?

Hello Blender community! First time posting. I’m a fairly recent 3D NOOB playing around with Element 3D and C4D renderer in After Effects, and I have a project that’s allowing me to dig deeper into ...
12
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1answer
11k views

Poly / Bezier curve from a list of coordinates

I'm trying to create curves from a list of points, I have the xyz coordinates in text files. I could make it manually via the python console for a single curve, but I have to do it many times and I ...
12
votes
2answers
516 views

Can I color a curve in Cycles by the direction it's running?

I'd like to colour a beveled curve in Cycles by its tangent (the tangent of the actual curve - not its beveled faces). For example: In this image, the curves running up/down are blue, and the left/...
12
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1answer
3k views

How to aproach the modeling of duct work, piping, wiring?

I'm wondering what the best way is to approach duct work, piping, and wiring? In the past, I have used the spin tool to make corners, but I find it very cumbersome. How do you do duct work and ...
11
votes
4answers
9k views

Why does a bezier curve twist when rotated?

If I create a bezier curve and rotate it in edit mode it does not accordingly rotate the tilt of the handles which creates an undesirable twisting along the curve. Here is an example using a bezier ...
11
votes
3answers
9k views

How can I make a Bézier curve have sharp and curved points?

How can I make a Bézier curve have sharp and curved points? Like a zig-zag. And also being able to make more 'circular' parts too. (I want to make fig 2, but I can only get to 1 by creating curves ...
11
votes
2answers
4k views

Keeping Bezier spiral curve handle tilt perpendicular to a specific axis

It's doesn't seem to matter if I use the curves "extra objects" to make the spiral or just create it on my own. I can't seem to find a way to keep tilt parallel to any one axis. Or make tilt uniform ...
11
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2answers
2k views

Mathematical formula for Bezier curves

What mathematical formula does Blender use to calculate Bezier paths?
11
votes
3answers
14k 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 ...
11
votes
4answers
4k views

Color of spline in 3d view

Is there a way to change the color of a curve object in 3D view? (change the black lines only for this object to green). I've got over 1000 curves generated by a python script and would like to ...
11
votes
3answers
11k views

Extrude and bevel an imported svg curve

I exported an svg 1.1 file from Adobe Illustrator CS6. I joined all the shapes by pressing Ctrl+J. I set the curve shape to 2D. Then I extruded using the right hand side panel: So far so good. But ...
11
votes
3answers
2k views

3D tube with sharp corners and uniform radius?

By using a vectorized bezier curve, I have successfully created a tube/pipe in 2D (with sharp corners) that a ball of the same radius can roll through: However, when trying to achieve the same in 3D, ...
11
votes
2answers
2k views

Normalize a spline

Is there a way to redefine a spline/bezier object into segments of even length or to tile the spline into a number of segments. (like the "normalize spline" function in 3dmax) example video Or to be ...
11
votes
4answers
7k views

Three bones following a curve

I have a chain of three bones and I want them to follow a curve (bezier curve). I've tried to do this creating a bone constraint follow path but it doesn't work. I'...
10
votes
3answers
6k views

How to make UV loft like 3ds Max in Blender using curves?

I am try to make a car Body using the technique like UV loft in 3ds Max. How to apply this technique in Blender using curves or closer to this technique? I have seen this technique in a Blender ...
9
votes
4answers
3k views

Dotted line on curve?

I'm making a video, and I have two identical objects that start in the same place and then separate. I want to have a dotted line connecting them which appears only when the two objects start ...
9
votes
1answer
4k views

How to make tied knots in Blender?

I don't know how to make tied knots, for example when I want to make shoe lace. Someone can help me, please? Thank you (:
9
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3answers
2k views

Generating jigsaw pieces from svg curves

I have generated the laser cut of a jigsaw in Inkscape. After importing the svg in Blender I am now trying to extract each jigsaw piece into it's own object. The problem is that my SVG is made of ...
9
votes
2answers
8k views

Straighten bezier curve?

Is there any way to straighten out the default Bezier Curve? By default it looks like this: What I end up doing is selecting the left control handle and rotating by 45° to make the curve straight. Is ...
9
votes
2answers
9k views

Why is the curve modifier deforming strangely?

I modelled a part of a bicycle chain added an Array and a Curve Modifier everything worked nicely until I added cogs and translated and scaled the chain parts to fit the cogs. I tried to apply ...
9
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1answer
4k views

Curve from Mesh, how to enable handles?

I'm trying to enable the handles of Control Points in a Curve that I got from Mesh, selecting the Control Points and pressing V didn't get any results, I tried all types of Control Points. Anyone ...
9
votes
3answers
1k views

How to animate multiple lines

I wonder what would be the best way of animating multiple 2 dimensional lines in blender. Lets say I have lots of line, that are parallel and have some sort of rule, kind of like a PCB board with ...
9
votes
1answer
12k views

Fill Bezier Curves

I'm having a big problem with the bezier curves in Blender. I'm trying to fill up the curves, but I can't. I have already seen some videos from YouTube, that say that I have to click on the 2D button. ...
9
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3answers
1k views

Is there an equivalent to Remove Doubles for Bezier curves?

I have been doing a lot of work with curves recently (mostly Bezier because of the greater control) and I have stumbled across an issue, I can't seem to find an equivalent option to Remove Doubles ...
9
votes
1answer
754 views

Deform mesh along two curves

I'm trying to modify a mesh so that one side gets modified along a curve, and one other side gets modified along another curve. I tried with vertex groups but it only moves the vertexes in the group, ...
8
votes
3answers
645 views

Wrap text around a Circle without deforming it. (numbers on clock)

Currently I'm creating a pocketwatch, but im having a difficulty in spacing out the text evenly, as can see here: If I tried to space it out by scaling with x, this happens: Is there any way I could ...