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Questions tagged [constraints]

Constraints are object features, they control in various fashions the object's transform properties such as its position, rotation and scale.

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Pull target rotates leg wrong direction

I followed a tutorial to rig my character, but the pull target for the leg makes it bend the wrong direction.
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14 views

Clone Animation to Controller Rig?

I have a tool that exports animations to blender, but those animation keyframes are applied directly to the rig. I have a better rig setup with constraints and a controller rig. The controller bones ...
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1answer
10 views

Why is Bone Transformation Constraint Speed too high?

link to a video of my problem : https://youtu.be/EI8dHZs6VF0 I have a problem from my rig. Apart from my IK I have made some bone constraint transformation mapped to the relative position of the ...
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9 views

Export objects dependencies to unity

How can i export object constraints correct? I have this in blender: And when I open fbx in Unity I get wrong result give me link to tutorial if i do something wrong help me please Export ...
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7 views

Ik constraint bone is not sticking to Ik bone target for all frames

Take a look at frame 71 in the images I attached. When I go from frame 70 to 71 the bone with IK constraint location is different from when I go from frame 72 to 71. Basically, for certain frames, the ...
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1answer
22 views

How could I have an object's Z axis align with the first derivative of is location F-Curve

I want an object to follow a path in space (specified via F-Curves, or by clamping to a Bezier curve), but I want the Z axis of this object to always be tangent to this trajectory (the same way that ...
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1answer
31 views

Copy relative positions of empties to bone rotations in a smaller armature

I have an armature and a set of empties that line up with each endpoint of a bone by their relative positions, but not by their literal locations or overall scale. The empties are animated in the way ...
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1answer
25 views

How to use API to get an object's constrained position? [duplicate]

I'm using Blender 2.8 but this question probably applies to older versions as well. Scenario: I have an Empty located at the origin. I have a Bezier Curve. The Empty has a Follow Path constraint ...
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18 views

Damped track object with snap

Is there a way to make a Damped track constraint but with rotation snap to value like each 90° ? Something like a "snap constraint object " i can add under a the damped track object ?
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Animation/position of vertices or faces controlled by another object's position relative to it [duplicate]

So I'm trying to artificially enhance a 3D objects look to look more 2D, by having certain parts of the geometry shift in specific positions when the camera is facing those faces/vertices from ...
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2answers
44 views

How can I stretch a bone's tail to another bone or empty with a constraint?

A want the second bone's tail to stretch to the third's head. I have tried to use the Stretch To constraint but then I would need the target to be at the tail at start. Is there a way to force the ...
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1answer
35 views

Python - Creating a empty per selected object and get the selected object position, rotation

I want to know how can you do the following thing in python. I have a Empty(null or locator) I want to create one for every object selected then I want that nulls to parent or constraint to the ...
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Hydraulic Cylinder with Damped Track Constraint not aligning (2.8)

trying to make a cylinder..watched several tutorials and did the following.. Center the axis for Rod and Cylinder at the pivot points Add an empty plain axis for the rod and the cylinder Parent Rod ...
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1answer
37 views

Set active bone in pose mode from Python script

I'm trying to use the function bpy.ops.pose.constraint_add() on bones through a script, but stupid thing is that I can't find how to set the bones as active ones which is needed to call this function.
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1answer
59 views

Limited bone doesn't rotate on a plane

(check this video for better visualization of problem) A bone with a limit rotation constraint doesn't rotate on a plane. Why?
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18 views

Animating a car crash while using rigacar?

So, i started to animate a car drive, that car will crash into a tree at the end. But how do i use the rigid body simulation while using "steering-bones" from the Rigacar-Add-on, those Bones have a ...
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1answer
43 views

eyes not moving 100% with head / eyes lagging behind

I've checked many other same questions. but none of them helped. It is still not working at my object. I hope that someone can take a look at it and help me out. Problem is that the eyes are lagging ...
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33 views

physics-based tank rig - interaction problems between OBJECT constraints and rigid-body physics

(I would attach my blend file, but I can't figure out how to attach non-image files (and haven't found any documentation on how); if someone needs it, just explain how in a comment and I can edit the ...
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Weapon animation constraints help

I'm having trouble with the constraints staying attached to the weapon. The weapon has its own rig, the root bone has the "Child Of" constraint to the separate player_rig's right hand bone.(The ...
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How to achieve automated followthrough with splines and constraints? (troubleshoot)

I'm creating a rig that involves the flapping of wings. The goal is to have the long finger/feathers act almost like a reverse IK constraint where the target is the root bone. I attempted this by ...
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UPBGE - setting a Rigid Body Joint to 'breakable' with Python?

I'm trying to create breakable RBJ constraints in-game. I can make a regular 'Generic 6DOF' just fine, I'm just not sure how to enable the 'use_breaking' tickbox from Python. Here's the code I have ...
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26 views

ferris wheel rigid body constrain

So i try to make a ferris wheel but using rigid body physics. The ferris wheel itself using a motor constraint and it work just great. But when i try to attach the cab with point constrain, well it ...
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Copy transforms constraint and the Limit distance constraint don't work like I thought

I am currently working on my first major project, for which I made an office chair. I have rigged most of it (although I probably brutally slaughtered all of the rules of rigging). My problem is with ...
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21 views

reset bone to use bone constraint

I want to use the bone constraint "copy transform" to a bone,but when a set a target the bone change position,rotation is all mess up without i move the target. I apply the location and rotation of ...
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Mute/unmute IK via Python API

I'm trying to mute/unmute an IK constraint via Python, but unfortunately the change is not applied. ...
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1answer
49 views

Follow path constraint location

Whenever I apply the follow path constraint to an object and a path, the object totally changes location to a way far away location. How can I make it so the object doesn’t move it’s location at all ...
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Drivers / Constraints resourses usage

I'm trying to optimize the rig of a cartoon creature, and this rig has really large amount of bones (more than 400) to have all the abilities according to the plot. I have IK/FK chains, Stretch To ...
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1answer
43 views

Using Python loop to attach empty to each bone in Armature

I'm stuck at the part of my loop where the empty gets constrained to the bone. I don't know how to refer to the bones and empties I want to constrain since their names vary as the loop runs. Here's ...
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1answer
27 views

Add ONE constraint to several bones?

So, I want to add a Limit Rotation constraint with "Limit Z" option checked for many bones at once. Now, I know about the "Copy Constraints" function, BUT in this case, the bones already have other ...
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30 views

Weapon Constraint Is Happening On Every Animation

Hi so I have a ton of animations set up for a character I have in Blender. I rigged the weapon and added a constraint to it so that it becomes a child of the characters right hand. And that works ...
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1answer
13 views

Bone Constraint/ Location rotation issue

Trying to get my model to clench his fist with the location rotation bone constraint however when applied the bone barely rotates at all. Is there something i left out? Blend file
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How to constrain vertices of an object to tracked point

I have a video where I'm moving my fingers around (4 points) and what I want to achieve is having an object whose vertices I want to move using my fingers. I already set up the tracking of the points ...
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32 views

Changing Influence value on Bone Constraint frame by frame

So i'm new to animating in Blender. And I'm currently having trouble with the 'Child Of' on the Bone Constraint, for some reason the 'Influence' value is not working frame by frame. What I mean by '...
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1answer
74 views

Simulating an egg on a conveyor belt getting smashed

I have a short animation of an egg shape (solid w/o liquid) and the egg is on a conveyor belt (follows directional movement of belt via driver) then was supposed to have the egg get smashed by a large ...
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1answer
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Pause in relationships and constraints

I want to talk about relationships between (for example) two bones. There are two bones (A and B), bone B has a Cconstraint, bone A is the target of that Constraint. Let the Constraint be "Child Of". ...
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1answer
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Bone constraint to 2 other bones

I have 3 bones (in the same armature) a sword, a sheath and a hand So I put 2 constraint (childOf) to the bone of the sword. One, attached to the bone of the sheath and the other to the hand. Now, if ...
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39 views

Bone Constraints do not appear in the bone constraints tab

I imported an XPS model into Blender with the XPS addon. Then I found that its IK doesn't work properly. So I decided to clear the constraints and fix it myself. But I found nothing in the bone ...
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1answer
31 views

Setting constraint influence in Python behaves differently inside vs outside 'If' statement?

The code snippet below contains a block code; running once in the global scope, and once inside the else branch of a condition: ...
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31 views

Can't add a Follow Path Constraint in Object Mode

For some reason I can't work out how to apply a Follow Path Constraint to my character in Object Mode. Something has gone a bit wrong in my outliner somewhere... The option to add a Bone Constraint ...
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1answer
40 views

Rigging simple objects

Here is the object I want to animate. It's pretty much about piston moving in the syringe. But how do I make it move along the syringe's axis, "lock" it in the axis so I don't have to position it ...
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Remove path constraint in object linked from another scene

I have a starship model following a path in scene A. The model is linked to scene B where I would like to do other things with it. However, the object keeps the movement animation from scene A. There ...
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52 views

Apply visual transform in animations

So I have 2 bones and a have a child of constraint on one of them. I keyframe the influence to make it seem that one bone is picking up another.I need to export this and use the apply visual transform ...
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Automate setup of bone constraints with script? [duplicate]

I have a few hundred bones in an armature that I want to add some constraints in pose mode to make the bones follow anther armature with the same bone structure. To do it all by hand is tedious and I ...
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27 views

Gizmo constraints are not constraining? [closed]

I've been using the bleeding edge 2.8 builds and downloading the latest build every day from Blender.org. On top of this, I've also been heavily tweaking shortcuts and trying to get myself as ...
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1answer
227 views

How can I use physics connect functions in Blender 2.8?

I've been taking tutorials of Blender at the age of 2.79(we still live in this age basically), and I am pretty used to the physics tool bar functions in 2.79, you can create physical constraints ...
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34 views

My IK hand doesn't work right

https://www.youtube.com/watch?v=RAL509I7fa4 I recorded this video to show you that the configuration for the bones of both sides of the body are exactly the same. At the end of the video, you can see ...
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39 views

Is there better way to rig this mechanical object?

I have an object consisting of 4 tubes and 4 pivot points. I'd like to be able to "skew" the object like this (it can only skew left/right, not in the third dimension): I managed to get it working, ...
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1answer
85 views

Why some constraints work in view port, but don't work while render? (Blender 2.8)

I've attached an example for Blender 2.8. I tried the same scene on Blender 2.79b and everything worked as it should. This is how it works in ViewPort: This is what I get by rendering (any render ...
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37 views

creating an adjustable center of rotation for a bone

I want to create an adjustable center of rotation for a rig i have so i created an intermediate control bone between the Root bone and the rig, and a pivot point target bone for it to rotate around. I ...
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47 views

Child Of constraints not working (blender file attached)?

I've got 2 rigs imported as FBX. Both are the same rig minus the second being imported with Automatic Bone Orientation. I've applied constraints to the first rig setting it up to be a child of the ...