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Questions tagged [splines]

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Creating Distinct Tree Crown Zones of Different Sizes with Geometry Nodes

I need help creating a procedural geometry nodes tree with splines. I want to distribute three "crown zones" of different sizes, from the biggest to smallest, like the tree on the left. Can ...
Boxon's user avatar
  • 1
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0 answers
24 views

Deforming instances along a curve geometry nodes

I'm hoping someone can help as I can't work it out and can't find the answer anywhere. What I have is an object instanced along a spline, and I want to deform these instances based on a curve, which ...
Mal's user avatar
  • 1
0 votes
1 answer
45 views

Using Curve ID to drive Random Value Node for Instances

I've instanced a Curve Circle at the end of two splines, which are part of the same geometry. I'd like to assign a random number between 0 to 5 to the Resample Curve count, before it's instanced at ...
Gano711's user avatar
  • 13
4 votes
3 answers
365 views

How can I separate curve from profile using Geometry Nodes?

How can I separate curve from profile like shown in the example image below?
YASIN IMGIN's user avatar
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0 answers
26 views

How to draw an irregular shape made of lines, arcs and splines?

What is the most straight forward way to draw a irregular shape made of lines and arc and spline, as shown in the screenshot? Thanks for your help.
persyst's user avatar
  • 93
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0 answers
28 views

How to export curve vertex animation to gltf/glb file?

I have animated a curve with 2 vertex in python by changing the position of the two vertex coordinates, and when exporting to glb the curve does not move. I am using blender 4.1. I animated the curve ...
Iván's user avatar
  • 171
1 vote
1 answer
41 views

Geo Nodes: Set object scale between spline points

Coming from 3ds max and Raiclone to create parametric models like houses I wonder how to change the scale of an object between 2 spline points on a multiple points spline: I can get that to work ...
1k0's user avatar
  • 13
1 vote
2 answers
90 views

Planes on Curves

My blend works, but when I wanted to respond to this post "Geometry Node: How would I convert a series of Curve Lines into a series of Planes", I proceeded using an empirical approach. ...
Fred I. R.'s user avatar
  • 1,039
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0 answers
51 views

Define custom Spline Index OR Rebuild Sample Curve Node

Is there a way to set a splines index or otherwise store an attribute on a spline that can be read as 'curve index' in the 'Sample Curve Node'? I'm asking because i have a setup where meshlines are ...
Rolando's user avatar
  • 57
0 votes
1 answer
45 views

Flickering problem on a curve

Hello everyone,my project is to animate a growth of branches on a trunk, and other branches on the firsts, and so on... To do so, in order to offset branches with the seem radius that the trunk have ...
Fred I. R.'s user avatar
  • 1,039
1 vote
3 answers
112 views

Taper a geonodes curve to center of curve & adjustable via group input?

I've created and resampled a curve and want to smoothly taper it to the center. I'm able to do exactly what I need using the spline parameter node and a float curve, but the problem is that I'm unable ...
Zero Dean's user avatar
  • 159
0 votes
1 answer
75 views

How to set the normal value of a point on a spline?

How does one go about setting the normals of individual points on a spline? Adding to that question, are these attributes listed on the spreedsheet window? Part of my confusion is figuring out the ...
Badboi3d's user avatar
  • 118
0 votes
1 answer
27 views

spline node with randomized siblings (smooth end and start converge to a givven spline)

I am trying to get the following spline effect. A group of splines (maybe starts from a grid), who follow a given spline but with some random offsets to the given spline. though this offset should be ...
Peter's user avatar
  • 2,355
2 votes
0 answers
57 views

Criteria for Spline direction

I often work with instances or deform geometry along splines, and I consistently find myself struggling to control the output of my operations. Blender sometimes changes the spline direction randomly ...
Juan Manuel Lynch's user avatar
1 vote
2 answers
35 views

Help finding a proper method to make roads, tracks, superelevation

I have some experience with Blender and found it impossible to make optimized roads with proper superelevated corners (road camber/tilt). I looked into Race Track Builder on Steam for track building ...
serow4869's user avatar
0 votes
1 answer
26 views

How do I change the length of the secondary bone segments with Geometry Nodes

I am trying to make spines generated on a Bezier curve and have it 95% working. The rotations are all correct and the scaling is how I like it BUT I cannot figure out how to change the length of the ...
Nik's user avatar
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2 votes
2 answers
169 views

Curve tilt of instanced curves to follow sampled geometry

I have a node set up that requires curves to follow a plane. (the plane is manipulated outside of geonodes and the curves follow) Is it possible to have the curve tilt follow the normals of the plane? ...
special_frog's user avatar
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0 answers
30 views

Geometry Nodes - Reversing splines depending on distance or radius of start and end points

I have tree object constructed with multiple splines. I'd like to make sure the end point of each spline is always the point facing outwards from the center of the tree. I'd like to do this by either ...
Adkopras's user avatar
3 votes
1 answer
109 views

Capturing Spline Factor Attribute for Linear Interpolation on Geometry

I am attempting to perform linear interpolation using the spline factor, transitioning from yellow altitude to green altitude. However, when I try to capture the factor attribute, I consistently ...
Burak Kahraman's user avatar
1 vote
1 answer
157 views

Get the length of the longest spline in Geometry Nodes [duplicate]

I'm working on a tree that needs to have a vertex color gradient depending on how far each vertex is along the branches of the tree, normalized in a 0-1 range. To do this I'm trying to get the length ...
Adkopras's user avatar
1 vote
1 answer
140 views

How to model coiled up cables

Blender to the rescue? After working pretty extensively with Solidworks for 2 years, I was tasked to model some realistic looking coiled up cables for solar panels. SW is definitely not made for that ...
Magnesia's user avatar
0 votes
1 answer
123 views

Spline IK moves weird and unpredictable

I have a Dog Model that I rigged from scratch. I used spline IK constraints for the Eyelids and Lips. Whenever I move any Ctrl Bones that are hooked to the related bezier curve, the movement of the ...
Eli Garussi's user avatar
5 votes
2 answers
167 views

Get information about spline cyclicity

How can I get the information whether the spline is cyclic or not? The example shown above does not work. What is wrong with my approach? With this method (Capture attribute), I manage to get ...
arachnoden's user avatar
  • 1,349
2 votes
1 answer
256 views

Geometry Nodes: How to find the intersection of two splines (not line segments)

This is not the same question as Geometrynodes Curve Intersections - or at least not how the answers interpreted it. That question solicited answers dealing entirely with two straight line segments, ...
Emily's user avatar
  • 361
2 votes
1 answer
191 views

Geometry Nodes: How to Generate ID based on order on X axis

I have a curve object with multiple splines. I can loft them, using something like the Higgsas GeoNodes "Loft Splines" node-group. This kind of approach uses the spline Index to determine ...
Emily's user avatar
  • 361
2 votes
1 answer
367 views

On mesh to curve geo node, how to get a seperate spline per edge

I am working on a roof project and want to automate the placement of ridge tiles on selected edges of a roof. Selecting the appropriate edges I was able to master. Now, ridge tiles require a direction ...
Quantor54's user avatar
0 votes
0 answers
466 views

Geometry Nodes Curve deform array on multiple splines

Since I seem to have made it too complicated. My goal is to line up objects with deform on a curve, but in order not to constantly use a new curve, it should also work with several splines of a curve. ...
TM1988's user avatar
  • 11
3 votes
1 answer
156 views

Make profile curve resolution variable across the spline

With geometry nodes I would like to convert spline into mesh in a way, where result mesh (tube) profile resolution is based on the main spline factor. Like for example on start of the spline (factor 0)...
skywalger's user avatar
2 votes
1 answer
317 views

Offsetting a 3D bezier curve on the XY plane in Geometry Nodes

I have a catenary bezier curve that I generated in Geometry Nodes from mesh vertices. I would like to duplicate and offset the curve on the XY plane (and make it work for both cyclic and non cyclic ...
Karolina's user avatar
  • 681
1 vote
1 answer
92 views

Keep resampling count on spline after being divided, geometry nodes Blender

I have a sequence of splines which its being resampled with a fix number each one, this number represents how many instances each spline will be instancing and its is saved in an field coming from ...
Juan Manuel Lynch's user avatar
0 votes
1 answer
459 views

How to get Splines/Curves generated with Geometry Nodes on Mesh object using bpy?

I add Geometry Nodes to the default Cube but instead of using its geometry I use a Curve Line: How to get this Curve Line data with bpy? I've tried the following ...
Andrey Sokolov's user avatar
0 votes
1 answer
50 views

Spline "motion tracking" indicators

Learning blender (3.4 installed), I see people creating a spline then turning on motion tracking to view the path with arrows. They do this with the Viewport Overlays drop-down, enabling the Motion ...
Robinson's user avatar
  • 101
0 votes
0 answers
16 views

more density curve on start [duplicate]

How to make a denser curve at the start via geometry nodes?
timur gibadulin's user avatar
3 votes
0 answers
113 views

How does 'Trim Curve' node evaluate the order of splines?

I'm animating trimming of Curves with Geo nodes. My setup looks something like this. I'm delaying the start of the animation for multiple curves. I don't know how to control the order in which the ...
wojtas's user avatar
  • 31
1 vote
2 answers
2k views

Curve Index of control point

I have a Curve object with two Splines and I want to use the Sample Curve node in conjunction with the Set Position Node to move the curve points. But with two splines all points are mapped to the ...
Phönix 64's user avatar
0 votes
1 answer
60 views

Resample Curve Clears Tilt

I have a cluster of generated splines made to look like plant stalks. They are instanced on points and then I set their individual properties. In order for me to set the curve radius I have to ...
Haskell McRavin's user avatar
0 votes
0 answers
13 views

Connect Planes generated by coordinates to a curve

I have some coordinate data generated by an app that I'm generating planes which allows me to visualize in 3d space a path (see screenshot).. Ideally this is good but it would be awesome if I could ...
Steve's user avatar
  • 101
2 votes
0 answers
164 views

Geometry nodes tries to join splines when deforming mesh along a curve object

EDITED: I'm trying to deform copies of a mesh-cube along a curve (and eventually animating them moving along the curve). My problem is that as I'm drawing multiple splines for the curve, the objects ...
Niilo Heinonen's user avatar
4 votes
2 answers
1k views

Geometry Nodes: How can I target each spline individually in a curve object?

Let’s say I want to build ladders with geometry nodes, using a bezier spline as « main » object. I would duplicate the spline to have two rails and add points on the curve to instanciate the ladder’s ...
gordie's user avatar
  • 2,550
3 votes
1 answer
510 views

Set Curve Radius of **Realized Instances** by Spline ID

I have a series of Splines (10 in the below example), created by realizing the instances generated by an Instance on Points node: I am attempting to randomize the radius of these Splines. If I ...
SlickRed's user avatar
  • 971
1 vote
0 answers
192 views

Geometry Nodes - Move points from other Splines using proximity

I have a horizontal curve (red node in below image), which is instanced on a vertical curve (green node in below image). The vertical curve has 3 points (ID 0, 1, 2) and the horizontal curve is ...
SlickRed's user avatar
  • 971
1 vote
1 answer
346 views

Rotate instanced curve vector to point away from original curve

I am utilising aspects of the following tutorial in a project but am deviating from the tutorial: https://www.youtube.com/watch?v=T__5FyCHL4E&t=1273s&ab_channel=MaxEdge So I am instancing a ...
special_frog's user avatar
3 votes
1 answer
239 views

GN: Convert spline factor to gaussian curve function

How would I convert spline factor into a gaussian curve using math? I am able to do it with a float curve but would like to make it parametric. example with float curve: EDIT: figured out how to ...
special_frog's user avatar
0 votes
0 answers
451 views

Geometry Nodes : handle each spline individually

using Geometry Nodes on a curve object, is it possible to handle each spline separately ? For instance, I would like to compute some stuff depending on each spline's length. But the Curve Length Node ...
gordie's user avatar
  • 2,550
3 votes
2 answers
1k views

Geometry Nodes Curve / Spline length simple math

I finally figured out, after searching for a while, how to make my Curve extend the way I want it to. But now I have the problem that I do not know how long the curve is. The goal is to multiply the ...
Andi 's user avatar
  • 751
2 votes
2 answers
736 views

How to remove instances from some parts of a curve? (Geo Nodes)

I'm trying to create a prodecural rollercoaster. I managed to include the pillars, but I want that, in some parts, the pillars don't show up, like in a loop: How can I do this? A side problem that I ...
Mateus Rocha's user avatar
2 votes
1 answer
227 views

How does the spline-to-mesh conversion algortithm work?

I'm puzzled by the process that Blender uses to convert splines (from an imported SVG) to meshes. This is the original SVG: and as (Inkscape's) SVG ...
simone's user avatar
  • 765
0 votes
2 answers
49 views

When animating End Mapping, can the spline ends stay with each other until they split off?

While experimenting, I found out that the endpoints of splines can extend so that they stay together until they split off. Unfortunately, however, I do not understand how this works. I managed to do ...
Andi 's user avatar
  • 751
3 votes
1 answer
706 views

Spline IK with control of both ends

Hiyo! I'm trying really hard to come up with a way to take a bone chain, for example of 5 bones, and use a Spline IK to match this bone chain to a curve WHILE controlling the exact position of both ...
Ryth Azhur's user avatar
1 vote
1 answer
738 views

How to access the position of the previous control point in a curve line in geometry nodes

This node setup is meant to generate routes for drops of water. It wraps curve lines on the surface with the geometry proximity node. Setup Result I would like each control point (except the first ...
Lucho's user avatar
  • 115