Questions tagged [constraints]

Constraints are object features, they control in various fashions the object's transform properties such as its position, rotation and scale. Use this tag for questions pertaining to constraints and their usage within Blender.

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Animating a solar system: 'child of' constraint resets after 180° rotation when influence is lower than 1

So I'm trying to animate a solar system with planets progressively being less and less influenced by the sun's rotation as they stand further and further away. I set an empty object where the sun is, ...
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2 answers
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Animation using Child of Constraint - cannot move the object from original place

This one is hard to explain. I have worked hard to produce the animation you see below. My plan was to have the missile launcher animated and packed in the box where finally I could just grab the box ...
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How do you make bones follow each other in an After Effect like way?

The After Effect way is something like a sword trail or the Tron bike trail effects. The trail is a plane mesh connected to bones and it's just like a gradient. All I need is to get the bones to trail ...
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17 views

How to set hinge friction?

I am using a hinge in my animation. The problem is that the friction rapidly limits the movements. Is there a way to tune it?
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Mesh array + follow curve which is moving

guys! I know this theme popped up several times, but no one solution is suitable for this situation. It's hard to understand, but i'll try. Actually this puzzle is very interesting ) I need to make an ...
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1 answer
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How to clear constraints for all objects?

Is there any way to remove, apply or clear all the constraints for all the objects (or selected) in scene?
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2 votes
1 answer
104 views

Why isn't this Track To constraint working?

I'm using the Cats plugin to optimize this character model for vrchat! Unfortunately, getting eye tracking to work has been rough. [Update 2022-5-30: This Cats feature is apparently deprecated! I ...
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Constrained object teleports after influence becomes 0

I'm currently trying to animate a character pulling out a gun and came across a problem with my "Child Of" constraints. The gun is constrained to the character's thigh and at the part when ...
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Animation Best Practices - Child Of transitions [duplicate]

I've got this scene doing what I wanted it to, specifically with the breadroll that starts off in the right hand, transfers to the left, then gets set down in the basket and moves along with it. It ...
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Is there a way to force a bone to snap to fixed-step rotation?

As in, is it possible for me to set up an armature so that a bone's X-rotation will snap to, say, 30°, -30°, or some multiple of 60° from there? I'm working on a toggle switch, and while I can ...
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Im trying to copy the rotation of a gear to an object but the gear is inbetween 2 axis so cant copy the constrain gear to an exact axis

Hi so I'm trying to copy the rotation of a gear I made to an object but the rotation of the object rotates on the Z axis and I want the gear to rotate on on the X and Y axis at once as the gears make ...
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1 vote
1 answer
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Constraints for shafts with a universal joint

I'm very new to Blender and have run into a Constraint problem. I want to design a couple of shafts with a universal joint that can have its output shaft repositioned by a half sphere on its local Z ...
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How to return to first keyframe after parent and unparent

I'm new here and first sorry for my english. So, I'm trying to create an animation of reloading a revolver, that is, I put the cartridge child of the cylinder and after being ejected I wanted the ...
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2 votes
3 answers
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Crossbow rig doesn't bend properly

I am trying to create a rig for the limbs of a crossbow in blender. Here is what I have so far: Each of the limbs is controlled by an an IK constraint. The targets of the IK constrain have a limit ...
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Set multiple Child Of constraints properly [duplicate]

I didn't see another question/answer on this topic - please point it out if you know of one. I'm trying to get these two characters to pass this canteen. Making one Child Of constraint, to make the ...
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1 answer
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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 ...
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3 votes
2 answers
116 views

Constraint controlled reflective mesh

Is there a way to use constraints such that a mesh with reflective material will be at the correct angle to reflect light from a point source to a target object? Or if not with constraints, is there a ...
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1 vote
2 answers
53 views

How to get Z Euler Rotation value of constrained object?

I have a shader that uses the Z rotation of an empty (called Sara_Origin) through drivers to calculate the shadows on the face. The empty's rotation is constrained to the head bone of the character ...
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1 vote
1 answer
45 views

Blender 3: rigging a trailer

I've been searching for a way to get a trailer rig, but the solutions I found are bullet physics method I can't find and a way using IK that's not clear at all. Anybody has a clearest solution (please,...
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2 answers
40 views

How to make an animated object follow a path?

Greetings, I'm working on an animation with multiple objects (150 spheres). I've animated the spheres and would like to make them follow a path without altering the previous location keyframes. I've ...
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3 votes
1 answer
35 views

Apply copy transform constraint using script

I'll try writing this the best I can. I want to be able to apply a copy transform on Rig 1 so it can be controlled by Rig 2. Both rig has the same bone names etc. Instead of manually going to each ...
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Animated bendy bone for copy position is wonky

Working with bendy bones and Auto Rig Pro. https://docs.blender.org/manual/en/latest/animation/armatures/bones/properties/bendy_bones.html I am animating this bendy bone with a handle. All fine and ...
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19 views

Dynamic spring system problem

I am trying to make a dynamic spring animation in blender. First, I followed this tutorial to create a simple spring model. https://www.youtube.com/watch?v=P50aMnJKvR0 Then I built the dynamic spring ...
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1 answer
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Maintain camera pointed at object while navigating past it?

I'm recording camera movement while moving around using walk mode. While moving, I'd like the camera to remain pointed at a particular object (e.g. an empty). E.g. in the scene below, I'd like to walk ...
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1 vote
1 answer
25 views

amature bone issue

Blend file: https://pasteall.org/blend/71bce00a56eb4703afa318be6672f20e Here is the tutorial. https://www.youtube.com/watch?v=07e1NUjYY_8&t=243s&ab_channel=BlenderFun I am following a tutorial,...
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1 vote
1 answer
22 views

Copy Rotation constraint without affecting Curve modifier

I have a Circle Curve with a Copy Rotation constraint with the Camera. I have Texts with Curve Modifier with the Circle Curve. When I move the camera, the Circle Curve follows the cam, but it breaks ...
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2 votes
1 answer
78 views

Something wrong with Follow Path Object Constraint

So I just rigged my car model and wanted to do the follow path constraint. I created a curve that has a shrink wrap modifier and constraint to follow the terrain. So now when I put a constraint on my ...
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Armature Track to Constrain works fine in top view, and the rotation mash up in from view

1- I have a sample rig with two bone one is vertical(have a track to constrain) and the other is horizontal(a roaming bone) as you can see above, the z axis is always looking at the bone, 360. 2- but ...
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1 answer
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Armature with a shrinkwrap constraint exported as animation data

I guess my question is how to bake the animation data from the Shrinkwrap constraint onto my Armature, but I'm so confused... So I really want to export from Blender to Marvelous Designer my character ...
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14 views

Objects are automatically attaching themselves to rigify rig

My rigify rig has dotted lines to the world origin as if there are object constraints, however I haven't added any contraints. I am unable to add new objects in to my scene without them automatically ...
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1 vote
1 answer
30 views

Why one of my finger bones refuses to follow IK constraint

I recently added a question about how to make my finger bones follow a rotating crank handle. That was solved. But of course this was not a full solution as I now have a problem that has no logical ...
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0 answers
11 views

Disable bone constraints at export time

Exporting rig to Unity via FBX, need to disable IK and other bone constraints before export so i can reproduce them in-engine. Any way to do this?
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2 votes
1 answer
31 views

How do I rig a folding door onto another rotating object that can rotate without actuating the folding door rig?

When I rotate this door it actuates the folding of the rest by the "copy rotation" object constraints I have the folding door controller parented to the empty that rotates the bridge. When ...
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0 votes
1 answer
41 views

How to make rigged fingers follow a rotating crank handle's bone

So I have a simple musical box rigged and animated rotating its crank handle. I have also a rigged hand posed to hold the crank handle of the box. I want the rigged hand to follow the rotating crank ...
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4 votes
1 answer
27 views

Armature Copy transformations Constraint Options in Blank

A Little help here pls... I made a COpy transformations constraint between 2 bones from diferent armatures and it has no options to customize.. help pls
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9 views

Are there any differences in animating a rig on a curve with Follow Path Object Constraint vs. Follow Path Bone Constraint on root bone?

The Object constraint will move the origin point, while the Bone constraint won't. But that's all that I can notice. Are there ...
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23 views

Object path tracking needs smoothness on a curve

I have added a constraint to my object to follow the path and the rotation of a front empty that is set to follow the curve; upon the first curve, the empty and the wheels snap back to the front ...
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2 votes
1 answer
34 views

How to parent a bone to a bone on another armature

I'm making a model with different sets of hair, so I want to the hairs to have separate armatures. The issue is how do I connect the armatures to the main one so the function properly. I tried using a ...
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0 votes
1 answer
70 views

How to add Shrink-wrap bone constraint to a child bone?

As you can see in the image, I added the constraint to the child bone and that should prevent it from going below the plane. But it seems that the parent bone overrides the constraint and moving it ...
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1 vote
0 answers
26 views

How to remove object constraint from parent bone?

I am trying to use an object constraint to make a bone tip follow a path. However, when I try to assign the constraint in pose mode the parent bones also get the constraint. Is there a way to remove a ...
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Shrinkwrap constraint has no effect on some objects

I struggle to shrinkwrap objects to the surface of a mesh. It works well with the default cube. But it doesn't work with objects in a collection although I have the same settings. These objects were ...
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0 answers
26 views

I set the Child Of inverse after already animating the object and character, is there a way to set the inverse retrospectively?

I didnt set the inverse on the Child Of constraint of the plate until after i animated it. I tried setting the inverse afterwards and setting the keyframe again and it works in the render for, like, a ...
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0 answers
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Need Solution for Train following curve (Bone Rigging & Constraints) [duplicate]

i am trying to make a simple scene of a train moving along a curve. I'm using this particular youtube video as a guide https://www.youtube.com/watch?v=-4a6XPYfWIM&t=190s however, i cant seem to ...
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29 views

Push bone to surface of mesh

I am wondering if it is possible without physics to have an armature bone be dynamically "pushed" away based on mesh surface. I know something like that is possible with the Limit Distance ...
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1 vote
1 answer
63 views

How to kill(or update) track-to/aim constraint for camera with Python API

I can track objects with camera constraints. I want to update object which we aimed(tracking new objects). So, I tried to update target object of the constraint but it does not work. Now, I am trying ...
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0 answers
25 views

How can I use fly mode on a camera with constraint?

as you can see if I try to use fly mode on a constrained camera it wouldn't let me not even if i check "offset" in the copy location constraint
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0 votes
0 answers
43 views

How to apply vertex data of bone constraint deformation to other mesh?

I'm using Blender 3.0.1 and the add on X-Muscle System from the blender market. I'm trying to add a mesh deformation achieved by that add on, which is basically a bone constraint to an empty, to apply ...
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0 votes
1 answer
32 views

Stopping a body part from moving

I am working on an animation of a cyclist on a bike, and I encounter a problematic situation while trying to make the rotational movement of the pedal: when I am moving the crank, the chain ring of ...
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1 vote
1 answer
51 views

Camera/object shake while following path

Hi everyone and please forgive me for my bad English :p I have a problem on my project when I add a path or a NURBS Curve. Indeed I want both an object and my camera following the path (a cockpit in ...
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0 votes
0 answers
23 views

Rig transforms using rigify and follow path constraint

I've been learning blender for a couple months now and I have created a character that I am attempting to animate. The rig for my character was created using rigify which worked wonderfully initially. ...
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