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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17 views

constrained bone not moving correctly

I am having and issue with rigid body physics. I have a main object that acts as a collision, and four objects around the first that have constraints that attach them to the first. I also have an ...
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Rigid bodies being affected by bone constraints

I am having and issue with rigid body physics. I have a main object that acts as a collision, and four objects around the first that have constraints that attach them to the first. I also have an ...
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1answer
31 views

Why copy rotation constraint does not register actual rotation?

I have an example, where I need eyelids of the character to follow eye movement. Eyelids movement is based on blendshapes driven by X and Z axis of an eyebone. Whenever I set target bone for eyes to ...
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How do you convert a rotation to use as a value between 0 and 1?

Basically I have a bone that rotates, and I want to use it's rotation to drive an Influence of another bone that ranges between 0 and 1... For example: If the bone rotates 0 degrees, the value is 0.0 ...
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24 views

How to only show the faces of an object based on relation to another object

I'd like to only show the faces of an object that another object can "see". So far I've been able to achieve this by putting a bounding box around the object I wan't to be partially seen and ...
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1answer
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How can I automatically move a robot's body to the correct height based on its leg(s) rotation?

When I rotate the leg the body or the luggage bag should come down slowly. Which constraint or any other way will achieve this? video Blend File
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1answer
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How to identify mysterious physics force affecting my objects?

I have some connected rigid body objects (a ragdoll). When I let physics do its thing, the ragdoll doesn't just fall - it acts as if some mysterious force hits it. While investigating what might be ...
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2answers
38 views

Blender camera with follow-path constraint does weird turns along curve

I have imported a 3D curve into Blender. It was obj and is now NURBS. All the curve points' tilt values are set to 0. I have created a camera with an empty parent object. Then, attached a follow-path ...
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Offset the bone in edit mode so animation isn't offset as well in pose mode?

I extracted a character's armature along with it's mesh model from a game's asset files, and when I import said character into Blender, some of the bone's location and rotation are messed up, they are ...
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1answer
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Baking animations on a Rigify rig with child of constraints does not preserve constraint

I am trying to bake a simple animation made with a Rigify Human rig. My rig is a humanoid mesh (the Unreal Engine mannequin but configured for use with Rigify). I have placed a "child of" ...
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2answers
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Why we need MCH bone?

Below in the pictures I have clarified the question and made it concrete. Simple Rig Example Blender File - for more details P.S. - setting of our rig - all axes of bones perfectly aligned. All ...
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1answer
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Transformation Constraint - Can't map location to rotation

I am unable to use an object Transformation constraint to map a location to a rotation. The manual says I should be able to do it, but it is not working. Here is a simple example. The Cube has a ...
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Add camera shake to a camera with track to mod

How can I add camera shake to a camera that has a track to constraint to a moving object?
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Why do my new ik rigs twitch after the 2.9 update?

I'm not sure if people had similar issues and asked a question similar to this, or if its just me, but after the new 2.9 update, any new ik rigs I make don't act properly Instead they start to twitch ...
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Constraints for mechanical linkage — linear to rotational

I'm trying to model a mechanical linkage using constraints and drivers (not rigging). In particular, I have a shaft (orange) that travels linearly, and it drives a pinion gear (purple) to rotate. I've ...
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Making a custom property driver in python

Hello I am trying to build a custom space switcher in my rig that is driven by a custom property. I will use this property as a driver for constraints in my rig. I also want this property to run some ...
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1answer
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Follow Path Constraint with Object with Array and Curve modifier not working properly

I can't get the stars to follow the path. Tried everything I found in other questions to no avail. here's the file
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1answer
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How to setup reasonable ragdoll constraints between body parts?

I'm trying to create a ragdoll to animate a falling person, following How To Make Any Rig Into a Rag Doll in Blender (Tutorial). Basically, it means that you create a cube (rigid body) for each bone, ...
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60 views

Non-wrapping rigid body rotations?

The simulated transformations of a rigid body can be read out through .matrix_local, .matrix_world, and animation drivers set to ...
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1adding object constraints to 2 animation

I have a dish attached to the one end of a bar. when the bar pivots up and down on the Z axis, the dish with copy location on, remains horizontal. Which is what i want at the end of the bar, I parent ...
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1answer
8 views

Why is the “source to destination mapping” controls is missing?

I am following an online tutorial on constraints transformation. The following is what I see in the tutorial m This is what I see on my laptop The interface is different and I couldn't continue with ...
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Is there a Way to Set Up the Transform Minimums/Maximums of Constraints by Merely Moving the Owner and then Pressing Some Button?

I find it counterintuitive to try to set the minimum/maximum transform limits of constraints by directly entering minimum/maximum values into the text fields for the owner of those constraints. It's ...
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Child of constraint two hands problem

Working on this fps animation and im trying to get the left hand to hold and move along with the gun like the right hand, but the gun bone has already been set a constraint for the right hand. The gun ...
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1answer
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'Child of' constraint not working on armature

Basically i am trying to make some first person shooter animations and i just can't get the child of constraint to work, As you can see, i tried setting the constraint on the right hand so that it ...
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1answer
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Bones with copy rotation rotate when the parent bone rotates

I'm trying out a way to rig a coat's hem using copy rotation bones that are copying the rotation of the legs, so it would rotate when the leg moves. So far it's working fine, until I rotate the waist ...
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Object Constraints - Floor: Wrong side?

I'm trying to constraint a camera inside a "complex" (i.e. not a cube or a sphere) mesh. Since I couldn't find any built-in way to do it, I'm splitting my mesh and separating it by its faces,...
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1answer
31 views

How do I set up a Follow Path constraint and also control its influence?

I need to add a Follow Path constraint to an object and also set up key frames to turn off the influence of that constraint after one rotation around the path: https://docs.blender.org/api/current/bpy....
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why hinge is not rotating with the empty

Any suggestion whats going wrong with the hinge. The top part of the hinge is parent with the empty arrow. And the empty (single arrow) is parented to the (Plain axes) empty. The (Plain axes) empty ...
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Constraint camera movement inside an object

I have shaped an object to try to define the "allowed" space for my camera. Now I'm trying to constraint the camera to its inside, but I can't make it work in spite of all the browsing I've ...
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1answer
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Constraints- My circle is not following the selected path in my follow path constraint

I am trying to make the circle follow the brazier curve path with a follow path constraint but it is only the blue line that is following it. What am I doing wrong? Saw lots of tutorials but still, ...
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1answer
39 views

How limit rotation constraint work?

Creating a door for the cabinet. I want to rotate it until it touch the base. Uptill 180 the slider (influence) works perfect 0 to 1. After increasing from 180+ value the slider (influence) does not ...
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How to let go the object with armature constraint?

So I`m doing a scene in which a man is waving with the sword and then he must stick it into the ground (like bownig before someone) and step away (disconnect from the sword). But I dont know how to do ...
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1answer
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Copy Transform Constraint Wrong Rotation

I have created an empty to hold the relation of the resting position of a bone to a weapon. I am setting a copy transform constraint on the hand IK with this empty as the target. The constraint ...
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1answer
136 views

Drivers don't see the final rotation of a constraint. How to get copied rotation instead of (0,0,0)?

The Premise: Say you have a driver on Bone A that makes it's rotation = 50% of the rotation of Bone B. Bone B has a copy rotation constraint to copy Bone C's rotation. My expectation would be that ...
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1answer
46 views

constraint one object within another & then rigid body

I am completely new to blender so, if the question seems incorrect or stupid, please excuse & guide me to relevant site/page. Here is what is want to achieve. I have the red object (it is a ...
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2answers
25 views

Snap bone back to an offset relative to another bone

I am creating a reload animation for a rifle where the left-hand needs to move to grab the magazine and replace it. I currently have the magazine set up with a child of constraint on the left hand so ...
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1answer
35 views

How to drive object's local transform by another object, while relative to third object?

That title is probably a bit confusing so lemme try to explain what I mean: Let's say I have two objects: Object A and Object B, and two cameras: Camera A and Camera B. I want the position and ...
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1answer
30 views

Eyebrow bone is detached from the head mesh

Exercising facial expression animation with settlers rig... ...and having a problem with keeping the eyebrow bones on the face surface. The rig and mesh are from Blender Cloud, Settlers. (see links ...
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I want an already rigged game character (Both Deform and Control) to be able to fall apart/be animated in pieces, and still be usable in unity

I have rigged my character using a deform armature that will be exported to unity, as well as a control rig, that I will use in Blender to animate the character. The deform armature bones have copy ...
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21 views

Locked track Camera error [closed]

Locked track object to camera x axis is very strange When camera is on z axis(rotation) x axis of cube turn up Is python can change it?
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3answers
29 views

Object rotates when Copy Location Constraint enabled

Blend file I have a character that picks up an object using the Child Of Constraint, turns and then releases the object at an Empty using the Copy Location Constraint. When the Copy Location is ...
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26 views

Rotation Euler in Constraints python

Transformation constrain have an Euler mode in Blender 2.9. I need it in Blender 2.79. Thank you in advance! https://developer.blender.org/rBS18d4ad5a59d32922f9d70b0412da0c830baceb17
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1answer
39 views

Optimal way to animate dragging objects through space from a spaceship

So I'm working on a short 5 second animation for a stream alert. I've made a rocket and constrained it with follow path, then used some custom animation to make it appear to (shoddily) fly. I also ...
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1answer
11 views

Apply transformation from axis of one object to different axis of another object in Blender?

I'm designing a kind of hinge mechanism. I want a sliding part's movement along the y axis to be applied to another part's movement on the z axis. I'm fairly new to blender so possibly I'm missing ...
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2answers
55 views

Limit Rotation to keep tip of rotating bone within a circle when rotating diagonally?

I'm rigging some eyes, and I want to limit the rotation so that the iris stays within a realistic movement range. This is easy to do for horizontal and vertical movement, but runs into a problem when ...
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Constraint Limit position not working well

I´ve made this synthesized train that uses a little mechanism to run. The thing is that it just goes bananas and i dont know why at all. Mechanism going bananas Let´s take the first frame as reference:...
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1answer
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Bones Mirroring Opposite Rotation

All my bones are mirroring perfectly except for my fingers which for some reason rotate in the opposite direction. Not sure what might be causing this the only thing unique to these are that the tip ...
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2answers
246 views

How to connect value from custom properties to value of object's translate/rotation/scale

Sorry I'm new to Blender, came from Maya. Let's say I want to move object A via changing value from object B's custom properties, how can I do it in Blender? In Maya, there's something called ...
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1answer
36 views

Trouble with Local Space Limit Rotation

I set the limit rotation, but the constraint not restrict the rotation, here is my setup, I can still freely rotate the object in all axis, So I tried to tick the affect transform option, but it gave ...
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1answer
24 views

Camera acts like it has a child of constraint, when there is none

My camera acts like it has a child of constraint when it doesn't. It has a track constraint but that shouldn't (and doesn't look like) it affects the position of the camera. It is under the armature ...

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