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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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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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13 views

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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9 views

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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8 views

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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18 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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11 views

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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18 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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7 views

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
18 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
33 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
24 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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27 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
10 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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17 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
60 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
25 views

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
40 views

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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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
28 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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21 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
35 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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9 views

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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28 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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15 views

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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21 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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80 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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26 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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34 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
62 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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21 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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32 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 ...
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Using two objects to control a third object's rotation (hinged landing leg)

I'm trying to set up a landing leg so that I can control the orientation + position of the actual landing foot by moving + rotating the two main vertical connectors, but I can't figure out a way to ...
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1answer
34 views

Solution for constraints - need help

Hi fellas I have a problem with solving an issue possible to find in the .blend file provided. If You open the file there is a simple scene with constraints applied to the AXIS parenting two objects. ...
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1answer
71 views

“track to” object under “parent” constraint

I work on this project for which we have a robot arm (6 servos), a camera attached to its extremity which tracks a physical object, and we wish to set up the experiment in Blender. We used an armature ...
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1answer
93 views

Set inverse Child OF constraints via python [duplicate]

A few years ago I used to be using a little script found here in order to reset every "Stretch to" constraints of an armature, in pose mode, even on unselected/offlayered bones : ...
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1answer
123 views

drivers and custom properties for buttons

I'm just beginning to get into drivers and custom properties for bones and I was wondering if its possible to set up drivers or custom properties for buttons rather than sliders. The reason is I have ...
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14 views

Inverse kinematics without a target, or by targeting to self

I have a complicated rig where the end bone in an IK chain needs to exactly copy the transforms of a separate control bone, so i can't have a target bone because that would mess up the "copy ...
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2answers
643 views

Problem using transformation constraints to rotate gears

So, I'm working on a clock and to help me animating it I am using transformation constraints, but when I put it in the third gear it started reversing the rotation after rotating some degrees, going ...
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14 views

changing the pivot point of a bone with “damped track” constraint

I am rigging a gun and I have a bone in the barrel of the gun that has the damped track constraint to follow a target bone. The thing is i don't want the bone to pivot from the back of the barrel, i ...
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1answer
103 views

Inverse Kinematics constraint with pole target

Salutations, I am currently trying to make a rig for a project involving 2D planes to create some kind of equivalent of DragonBones in Blender (I'm working on Linux and DragonBones isn't available ...
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23 views

Why does the Transform's Z not change for an object constrained to an object that does move along Z?

I have a "motorbox" object (just a plain box for now) animated to move vertically. A "rod" (long thin cylinder) near it has a Copy Location constraint to copy the Z coordinate. When I scrub the ...
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20 views

resetting all “stretch to” constrained bones at once

Whenever you edit the position of a bone with the stretch to constraint, it ends up causing the bone to be out of position in pose mode. To fix this theres a "reset" button in the constraint window. I ...
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27 views

Move a gear rack with the Transformation Constraint?

I used the inverse Copy Rotation constraint to get the gear to "spin" the gears with the shaft, but I can't figure out how to move the rack (the straight gear) along the y axis as the others spin. ...
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47 views

Tracking constraints lagging in render (can't redo whole rig)

I spent a couple weeks rigging some angel wings, using track to constraints to line up the biggest feathers. Now, the feathers lag behind the animation I made. There's so much in the rig, I can't redo ...
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1answer
45 views

very simple Z Normal axis rotation

new to Blender, so please forgive if obvious.I have been looking for an answer on this.... Goal: Simple object (e.g. cube) , once rotated 45 degrees, can have rotation on its Z Normal animated. I ...
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1answer
71 views

Turret Tracking with Polygon-Aligned sets of Objects in Animation Nodes 2.1

I'm attempting to add gun turret style tracking to objects that have been placed onto the polygons of another object using Animation Nodes 2.1. I'm currently attempting this with blender's built in ...
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1answer
39 views

Orient an object relative to another and constrain distance to radius

I've got two objects: a cylinder and a cone. I want the cylinder to effectively act as a constraint on the cone such that the cone is always the same distance from the cylinder and the cone is ...
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25 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 ...