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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rigging mechanicle tentacle

I modelled the tentacle you see here: -One big module should only move as a whole under each Gland is a ball every ball is connected trough a screw to a Connection ring (even not shown) ball, module ...
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29 views

How to scale child object when only part of the parent object is scaled

I am trying to make child cube scale properly when only inner surface of the parent object is scaled. It's better to show an image: I can easily make it so, that if whole parent object is scaled, ...
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Copy rotation constraint and simulation not working in blender 2.8 final render

I made a character animation with a cloth simulation in Blender 2.79. Among others there is a copy rotation constraint on the pelvis bone that copies from upperleg01. I need that to achieve a ...
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Is there a way to enable the Child Of constraint without offset?

Oftentimes I encounter a situation where I need to disable the Child of Constraint, adjust position of the 'parent' without moving its 'child' and then enable the constraint back in such way that the ...
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I can't ignore constraints when duplicating or adding a modifier to a group/collection

I am trying to make an array of a collection/group, each object in the group has a constraint applied to it. I want to apply an array modifier to the collection/group. the issue I am am having is that ...
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Blender constraint, parent issue

I'm new to blender it's really amazing. I'm animating some mechanical engineering parts. I want to create a small 2 finger gripper with a transform constraint so that when i move 1 object the other ...
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2answers
95 views

How to properly make an object to follow a path?

a have a considerably simple path and an object to follow that path. Following the basic procedures: Create a path and object, Add Follow Path constraint to the object and select path to follow, ...
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34 views

How do I limit the movement of an object to two directions?

I'm trying to get a 'rigged' mechanical arm to move in 2 certain directions: Some other objects in my Blend-file are able to go in a certain direction using transform constraints. But this won't ...
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Floor constraint makes armature move floor

I have a model with an armature, with IK legs, that I want to animate. Before I begin animating, I would first like to constrain it to a rooms boundaries, specifically the floor. When I set up the "...
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33 views

How to create a pole to follow and empty with arbitrary origin

I want my "pole" follow point B from point A with no stretching, this way Intead of this I get this: How can I follow the point B using the pole, keeping the point A as origin, and keeping the ...
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Use multiple Child Of constraints in one bone and animation

I have a model and rigged this model then i added 2 Child Of constraints to one of the bones and in timeline i want to change parent but when i do this , bone and attached mesh go to other place and ...
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Animating constrained/child objects

What im trying to do is to animate hands with pistol. When i animate it is usefull to have pistol connected to hand when i move it around. But in actual game i'll have pistol as separate object, NOT ...
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Adapt Limit Location Constraint to Bounds of Mesh Object

I recently asked a question here looking for advice on constraining a bone to within the internal space of a custom mesh object, using the default bone constraints available in Blender. I've been ...
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Limit Possible Bone Location Within Custom Object

I would like to be able to constrain the possible X,Y and Z locations of an armature bone to within the 3D space inside a specified mesh object, such as a cube or sphere (and eventually a custom shape)...
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81 views

Make a Soft-Body to follow path

I am making a small tetris animation but the problem is that the blocks are not falling as they should. Sometimes they collide with the container walls and sometimes they do not land on the position ...
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1answer
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Lock Limit Location Constraint Out of Bounds Values

From blender.org: https://docs.blender.org/manual/en/dev/animation/constraints/transform/limit_location.html Says right there: When an owner is grabbed and attempted to be moved outside the limit ...
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2.80 nla.bake - returns 'Nothing to bake' - when selecting bones through script

I'm trying to write a script that bakes constraints to bones. However if I select a bone via script the bpy.ops.nla.bake() operations won't run, it just returns "Nothing to bake" in the system console....
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Blender Constraint : Slide Link

I am writing this post because after hours of browsing I can't really find what I am looking for... Or maybe didn't look in the right place... So I'd like to know how I can simply apply a slide link ...
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Sticky option on Floor constraint in 2.8?

Is this not implemented yet? It works in 2.79 but not in 2.8.
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How do I remove a bone constraint in the middle of an animation meanwhile keeping location [duplicate]

Im trying to do a first person animation of unsheathing a sword, i have child of constraint on the sheath with the actual sword as the target, and the actual sword has a child of constraint and target ...
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Object Constraint menus and data Not showing up once constraint is added

in 2.79b, when I add a constraint to anything no additional edit menus appear. Usually, and I checked this with a version at the school I teach for, a constraint menu will appear under "ADD OBJECT ...
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Copy Rotation constraint rotates on the wrong axis

I have a foot bone that has copy rotation contraint applied to it. It copying the rotation of an IK footcontrol bone as seen in the picture below. On the copy rotation bone I have Local with Parent ...
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Animation keyframe - lost after removal of copy transform?

So, let's say I have 2 bones on 2 different armatures within 2 different layers. I have the bone from layer 2 armature 2 with a copy transform to replicate the exact shape form transforms rotations ...
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1answer
48 views

Rotation problem with Action Constraint

I would like to trigger an action that I created earlier on a bone (Drumhit on the upper arm bone of a drummer). The action would be triggered by another bone of another armature (snare on Drumcontrol)...
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1answer
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Circuit board (technical elements) with particles

So I was watching this video the other day: https://youtu.be/-pH48mSEH0M?t=243 and at one stage they show off how they made some of the technical elements of their VFX's. 3DS was being used for this, ...
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44 views

How could i make rotating tiles animation like in this video

So i've been triyng to replicate something that you can see in this new game of thrones intro starting at the 10 second mark, where the ground is made of these slabs/tiles and they rotate in this sort ...
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41 views

set specific bone as child of object

The pencil in picture follows a path, and the hand bones connected with IK, I want the last smallest bone to follow the pencil location. when I add constrain in edit or pose mode, it parents the ...
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Camera Movement with Constraints Issue (Blender 2.80 Beta)

I have a camera with "Track to", "Clamp to", and "Follow Path" constraints set. Everything works fine except the camera moves along the path and then bounces back along the path. I just want the ...
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32 views

The Transformation Constraint Can't Evaluate a Target's Local Space? Why?

I've been playing with the transformation constraint in Blender 2.8, and it seems the contraint will not read a target's local space; it will only read a target's world space. I was looking for a way ...
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26 views

Action Constraint is being animated for some reason

Something strange is happening to my rig. I'm using Blender 2.8 and I began rigging with an Action Constraint and for some reason it's playing the Action that I made and stored. I've double checked ...
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25 views

Is there a way to record absolute position?

When using a Child-Of constraint, I sometimes want to toggle it off in an animation, but still make a new animation based off of where an object was when the constraint was active. When I do this ...
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suspension with follow path constraint

just delving into physics in blender for the first time. I have a car following a path, everything's set up, drivers turning wheels based on the evaluation time, but one thing I'm struggling with is ...
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46 views

Armature: Align and rotate bones at the same time around center point

I try to make an armature where the bones are aligned in a circle around a MasterBone. In Pose Mode I would like to be able to e.g.: Bring all tails of the LowerBones towards the center (so they all ...
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Amrature Character Rigging: Skirt bones rotate when Root Bone is rotated as well. Any way to prevent this?

In the example shown above, I have an armature of a character. In said armature is the set of bones referenced in this question. The skirt bones have a, "Child of" bone constraint on them that follow ...
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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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20 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
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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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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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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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30 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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57 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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22 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
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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
66 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
297 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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60 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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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 ...