Questions tagged [splines]

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7
votes
1answer
1k views

Spline wrap animation

I want to create in blender an animation similar with this one: I am wondering how could I do and if it possible to interact with rigid body objects? Who can help me, please ... thank you!
6
votes
1answer
832 views

Access hair child strands (animation nodes)

Animation nodes has a Hair Data node that allows you to get Splines from Particle Hair strands. However, it does not seem to output child hair strands. Is there any way to get the Child hair strands ...
4
votes
1answer
705 views

How to control object's path follow speed based on its position

I am trying to animate a rollercoaster. For now I have a cube following the Bezier path of the track. I need the cube to change its follow speed based on its height. (the higher it is, the slower it ...
4
votes
1answer
541 views

Animation Nodes - Blend distribution of objects on a curve into another curve

I've been trying to recreate the effect from the Cinema 4D tutorial below: https://www.youtube.com/watch?v=BPv2HVvQfGo I'm stuck at 9:55 where he uses the inheritance effector to be able to morph ...
4
votes
1answer
917 views

How to delete bezier points from curve splines with low-level code

I'm trying to edit curves via python, but deleting bezier points is causing me trouble. I'm able to do it using high-level operators (see sample code below), but I would prefer edit the data more ...
4
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0answers
1k views

Dependency cycle detected

Older user of 3ds Max, I am a new user of blender. A friend introduced me to your forum to ask my questions. I'm delighted to be here. On this moment, I'm trying to learn the rigging on blender and ...
3
votes
1answer
888 views

Animation Nodes: Merge spline points

I have been trying to use Animation nodes to create splines on certain edges, as can be seen in this question. It is working, but I am running into a problem: The splines that are generated by the ...
3
votes
1answer
828 views

Rollercoaster Problem: Bones following Curve

I'm trying to make a train mesh follow a curve path. The Curve modifier does this admirably, unfortunately I need to export the animation to a game engine so a modifier just won't do. I tried adding ...
2
votes
1answer
89 views

Joining two curves in edit mode

I'm trying to get rid of some gaps in my mesh. In object mode it looks like this So it is one object. When I switch to edit mode it turns out that splines are subdivided. How do I join them?
2
votes
1answer
509 views

how to connect objects with splines with animation nodes?

I have a group of objects all with keyframed movement. I want to a create splines between the closest objects as they move like this... https://www.youtube.com/watch?v=k9MvcCXsHHY I know you can ...
2
votes
2answers
796 views

Create one curve object per spline in Animation Nodes?

I am trying to create a scene where a list of spheres are positioned onto the verts of a hidden icosphere, and as I move an empty through the icosphere, the visibility of the balls is toggled, and ...
2
votes
1answer
581 views

How to assign different colors to splines viewable in the viewport?

When importing a .dxf architectural drawing I get all lines drawn in a dark green color. (however they had been assigned unique colors in autocad) Is there an option to change the appearance of one ...
2
votes
1answer
767 views

How to do basic parametric modeling onto a spline

I'm looking for a way to do some basic parametric modeling in blender. I have 3 pieces i'd like to use as a base. 1 starting section, 1 middle and 1 ending. Is it possible to generate a combined ...
2
votes
2answers
222 views

How to get radius of a spline in animation nodes?

Similar to Is there a way to address the shrink / fatten / radius values of individual vertices on a curve with animation nodes? I've got one main spline that acts as a driver. This spline will have ...
2
votes
0answers
31 views

Drawing/editing spline shapes. How?

I have been using 3DS Max for years in my profession as an exhibition designer, I use extruding spline shapes quite often. A simple example would be drawing a rectangle to the size I need and extrude ...
2
votes
0answers
128 views

Procedural Wire Generator in Animation Nodes

I’d like to figure out the method to creating this procedural wire generator inside Animation Nodes 2.1 as depicted in this youtube video here: https://youtu.be/lsXb5ywrg_I The video gives little ...
1
vote
2answers
444 views

create gaps between spline points with animation nodes

Following this answer curve intersection with volume in animation nodes, I've managed to create a spline which i use to distribute objects inside a volume. Here is how: But I still need to avoid ...
1
vote
1answer
83 views

How to make a mesh deform accurately along curves?

I started to make a mountain pass based on a real road, but I encountered this problem. It gets better when I drag a curve point before the curve down to hell(see pictures), but that's not a great ...
1
vote
1answer
182 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
40 views

(Animation Nodes) How do I get an object to follow a spline without rotating along it?

Fairly simple question but I'm new to animation nodes and don't know how to do this. I want an object to follow a spline using the Follow Spline Action, but maintain its rotation. Basically like ...
1
vote
1answer
344 views

Animation Nodes -> splines generated and how have a random material color for each spline?

following How to store particle locations in a list? you can trace particles to splines (list), but how can we have a random color in the material for each of the splines... they are all in one ...
1
vote
1answer
84 views

Custom squash and stretch without spline length ratio

When I add a hook, calc_length() is calculated without modifiers. I don't fully understand the purpose of calc_length() now, ...
1
vote
1answer
297 views

Extrude multiple Shapes along the same Curve

I wish to switch from C4D to Blender and I'm trying to replicate the same workflow I'm already used to before making the step. In this specific case, I need to extrude a number of different Shapes (...
1
vote
1answer
629 views

Force redraw / update of curve object

I have written a script that syncs the position of a bezier curve handle to an empty via a handler (bpy.app.handlers.scene_update_post): ...
1
vote
0answers
32 views

Animation node - How to change the shading (smooth or flat) of a series of splines?

I managed to create an animation with concentric circles in animation nodes, made from points in a circle that I duplicated inside an object output. I want to change the shading of the splines (...
1
vote
0answers
17 views

how to copy an animation from one mask to another mask

I Have an animated mask. I can copy the splines to create a new second mask of it very easily, but the animation does not appear on the dopesheet of the second mask. Is there a way to copy this ...
1
vote
0answers
29 views

Defining locked start and end points on turbulent splines in Animation Nodes

I'm attempting to make an animated "sound wave" effect using AN. So far I have the bouncing spline looking the way I want it -- How do you define specific points along the spline to NOT ...
1
vote
0answers
63 views

Define UV coordinates for a curve

I have a file that define some curves and values from 0 to 1 for each point in the curve. I am trying to create a material which uses this values from 0 to 1 as the UV coordinates for a colormap ...
1
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0answers
20 views

How to change color along spline?

Would like this spline to have a repeating pattern of red, white and blue along the length. Right now I'm stuck with just one red, one blue and one white along the length.
1
vote
1answer
214 views

Assign random color to spline list

I created a spline list following this guide. Now I want to assign a different color to each spline using Cycle's random node, but it doesn't work because the splines are grouped into one object. My ...
1
vote
0answers
69 views

Spline IK gets disabled on random frames (new depsgraph) / bone drivers get updated too late

I’m trying to get my Spline IK working. It’s behaving the way I want to, except for random frames where it looks like the Spline IK doesn’t get applied to the bone chain and the bones go back to their ...
1
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0answers
81 views

Interpolation bpy.types.Spline

Is there any bpy python function that I can use to interpolate over bpy.types.Spline ? Function with some 'factor of spline' argument and result in translation and quaternion
0
votes
2answers
124 views

How to create a progressive coil spring in Blender 2.82?

I've been trying to create a coil spring with a progressive elongation of the spiral in the Z direction and so far have been coming up short. Seems like it's possible to scale the radius easily enough,...
0
votes
2answers
62 views

cut out a piece of the terrain

See image. I'm trying to cut out a small piece of the terrain to use for particle system (scatter trees, grass etc). I used the knife tool to draw the area (orange line). How can I then delete the ...
0
votes
1answer
68 views

Ice-Rock Spell Animation Nodes

I'm trying to get effect below in Animation Nodes. The effect seems simple enough, I just don't know how to set it up. Anyway thanks for looking.
0
votes
1answer
51 views

rig for hardsurface deformation

I'm trying to build a simple rig in order to deform a rectangular prism (simple mesh for the time being), but it needs to have its deformation locked to just one an axis. The resulting mesh should be ...
0
votes
1answer
1k views

Armature shifts between Pose mode and Edit mode

I'm using s Spline IK system to create the spine for a creature I'm making, but when I activated the Spline IK, some parts of the same seem to shrink or shift a bit. Which slitghly deforms my mesh a ...
0
votes
1answer
248 views

Spline auto UV not working

I'm trying to add a simple repeating patter to an extruded spline by clicking "Use UV values as Generated Texture Coordinates" and also using "Generated" mapping in Cycles. Howeever nothing happens at ...
0
votes
1answer
22 views

how to find close points between two values in animation nodes

I'm trying to make some splines and I found "find close points" node but the problem is it has just one value : max distance , but how can I make edges between two values min and max? or ...
0
votes
1answer
44 views

I have accidentally toggled something to show some weird dotted lines [duplicate]

I have just accidentally toggled on some weird dotted lines. Any idea how to turn these off. P.S. the model was imported from Fusion 360.
0
votes
1answer
62 views

How does this works? verts = [[float(i) for i in r[:3]] for r in rows]

I looked over here and found a csv reading script that creates curves, wich is exactly what I need, it´s cool, but I need to modify it because I need to read a differently formated csv, in fact I need ...
0
votes
1answer
52 views

Keeping track of splines in curve -> splines.get(), but what is the key?

I have a curve and want to check whether a spline already exists. As other data types, there is a get() method. But what is the key? Since splines.new() takes only one argument (the type), there ...
0
votes
1answer
46 views

Animation nodes - Replicate splines - random bevel size

Id like to build set of spline with applied vector noise to simulate lightnings. I have followed Chris.P. tutorial and its done. But I have two problems. How can I set different Bevel Depth on each ...
0
votes
1answer
44 views

Getting 90 degrees out of a bezier path

So trying to create this wire and I can't seem to find the solution for how to keep the end from collapsing, or pinching, on itself when making a turn like this. Tried adding more points but that ...
0
votes
0answers
12 views

How to delete vertex without delete Active Splines moudel?

Problem: Delete 1 Bezier or Path curve vertex will delete the Active Splines moudel. Is there a way can keep Active Splines moudel? or a py script can create Active Splines moudel for a curve? Blender ...
0
votes
0answers
14 views

New specialized 2D viewport [duplicate]

I'm making an addon where I auto generate a spline with a bevel and taper object. The taper object serves as profile of the thickness along the spline R(t). So it would be very nice to have this in a ...
0
votes
1answer
33 views

For loop splines amplified ! , why? How can I stop it?

I am creating a for loop to connect pairs of objects by a Splines To understand better image atoms in a molecule. It seems that every time I create a new spline is in someway taking in consideration ...
0
votes
1answer
36 views

Animation baking error

To showcase the problem the easiest way, this is what the issue looks like: https://youtu.be/esihE0ob7U8 As you can see, the track chain makes a momentary 'jump' when the baked animation is played ...
0
votes
1answer
34 views

Is there a faster process for converting splines into rigged meshes?

I wanted to have my character's arms be more akin to that of a cartoonish noodle, so I decided that the best way to accomplish this would be to create a Bezier curve, create a mesh out of that curve ...
0
votes
1answer
45 views

Problem with imported SVG - cannot convert curves to mesh properly

I imported an SVG caption from CorelDRAW and all letters are fine and get converted nicely to mesh, except the first one - "S". When I convert it to mesh it disappears. Also, it's the only ...