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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16 views

Is there a list of standard human bone constraints

I've rigged my character using a modified version of Rigify, and have just started working on bone constraints. I understand the technical side of this, but as I started experimenting with my own ...
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How to build with connected triangle planes?

How can I use one triangle as an element for constructing a large organic structure? I want to do the following: I model the shape like a i would normally do, the triangles will 'replace' it. All of ...
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Make constraints to fit cylinder into centre of icosahedra joint

This is a little cylinder I want to fit into the exact centre of joint of icosahedra. How to make proper constrains? Distance from cylinder to each bend must be equal Central axis of cylinder should ...
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How to access a follow path constrained object's location from a command line render

In Blender 2.82a, using Eevee as the render engine, I can access the following matrix_world attributes successfully to obtain the location of a Cube move in an animation using the "follow path" ...
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Copy location contraint breaks when scene is opened from different computer

I have 2 character rigs linked into a blender scene. I want to animate a shot when one character is holding the other one. and I want to use a copy location. When I do so, it works correctly on my ...
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armature copy rotation weirdly flips the direction

I am trying to make an animation of closing/opening of a Book. For this I'm using bones to control the same. I have added the bones as shown in the image, the closing of the covers are controlled by a ...
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Facial Motion Capture Help

I'm trying to apply facial tracking markers to a 3D model and I've run into a bit of a snag.. While setting the constraint depths of the trackers to a face mesh, the trackers stay locked in below the ...
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1answer
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Limiting minimal scale to 1 still goes to negative values

So if I limit objects scale (by a constraint) to minimum of 1 and maximum of 2 and start scaling it, it still manages to go over on inverting it self to negative values keeping the limits to -1 and -2....
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How to snap to a face with axis constraints?

I'm trying to work out a problem that's best described visually: the problem. I'm trying to snap a vertex to where its y-axis contraint intersects the face of another object, which apparently doesn't ...
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Copy Location constraint is applied to all bones in armature even though I want to apply a different constraints to each bone

I'm working on a project where I'm using multiple tracking points to which I want to link bones that deform a mesh. I want to use a copy location constraint to link each individual bone to a different ...
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Why can't I access the rotation and location values of an object moved with empties and constraints with Python?

I created a mesh in a script that has 5 vertices and each vertex is moved by an empty using Hook constraints. This animates the plane to follow the path of a spinning torus based on the animation I ...
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can the bone become a 'child of' a parent object?

I want to make the hands of the person 'track' the handle of object and I can't make the hand bone the parent using 'child of' constraint because my object is not fully merged together and when i ...
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Interpolate motion between motion track keyframes

I'm trying to get a simple 2d track from points on a finger. Sometimes the finger moves quickly and the tracker loses it for a few frames. Once the finger settles, I'll manually move the track back ...
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Customizing the Rigify meta-rig, Constraints & Custom Drivers, what's the solution?

basically as the title says I am interested in two things: How do I add constraints (Copy Rotation, TrackTo, etc.) to bones in the metarig, and then have them created/applied to/copied to the ...
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Bone Roll and transform lock, is there a trick to getting bones that face the right way for child's rotation?

I've tried every imaginable combination of Roll value and "Inherit Orientation" for both parent and child both Before and After creating the child. When I create my child bone (a horizontal one) and ...
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How to change canvas size in 2D Animator

Is it possible to set specific pixel dimensions for the 2D Animator canvas Or even to change the canvas ratio? I want to create an image with the specific dimensions of, say, 273x400p.
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Rigging a tank without distortion

I've made a tank model, kinda futuristic so there is actually less rigging to do (the idea is a tank that has 4 treads that are each rotating at their joint with the body at the outermost. this would ...
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37 views

Throwing Objects in blender

I wanna know how to throw objects in blender 2.8 when grabbing and then throwing it while keeping it in place because every time something picks up and i use transform to move the object around, it ...
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Funny rotation differences between Quaternion wxyz and xyz Euler

I am rigging my character. The Central thigh bone has copy rotation of FK thigh control bone. Pls refer the picture for clearer circumstances. I hit R -> Y -> -90 to open the leg to test rig. Then ...
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Limit rotation to 180+ in X axis?

Here is my problem. I'm trying to limit the X axis to the local space, at 185 degrees, but as I rotate, it snaps at 0 as expeced. But when rotating as so, it snaps back to 0 from 180 degrees. I ...
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Bullet Constraints Tool Add-On [duplicate]

I downloaded this add-on, but can't seem to find where to use it in any of the menus. I'm using version 2.81 of blender. Does anyone know where I can find it in version 2.81? Or does it even work in ...
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'Bone' object has no attribute 'constraints'

I'm trying to code a script that will copy the rotations of the bones from one rig to another on all the bones ...
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1answer
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Copy bone transform question

What i'm trying to do is to duplicate whole armature and add Copy Transform to each bone on duplicate. Basically i want arm from armature duplicate to have Copy Transform constraint with target on arm ...
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How to solve blender's additive parenting?

If I parent a bone(A) to a master bone and give it a 'child of' constraint to get influenced by a certain bone(B), Moving the master bone will exaggerate the movement of bone(A) as if it's going ...
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Stop bone roll when using constraints to move bones?

I'm trying to animate a wheel spinning and following a certain path determined by the positions of animated empty objects. This armature is created from having the heads and tails of the bones follow ...
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How to read the dependency cycle log

I am building a rig and met a dependency cycle. And I tried to read it from the system console. The overall context is grasped, but I didn't realize what was going on specifically. Things like ...
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Sphere distortion when attached to path

I'm new to Blender. Now I'm working on a low-poly model of Earth orbiting Sun and I have a strange problem. I added Follow Path constraint to my Earth so it follows elliptic path around the star. But ...
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how can I position an object at a moving bonehead?

I would like to draw a steam locomotive with rotating wheels, driven by a horizontal rod. Cannot find an Object Constraint to couple an empty to the head of a rotating bone. The base of a second ...
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Is there a more efficient way to get F-Curves from tracking daa?

I have about 20 tracks of mocap data that I want to convert to F-Curves so that I can use the graph editor to calibrate and edit them when applied to bones in my rig. The only way I've found to do ...
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28 views

Blender 2.8 Copy 50% bone rotation between different local axis

I am trying to make the Bone 1 copy 50% rotation of Bone 2, as below. Mixed axis of the bones make it difficult. Please, what should I do? I spent hours trying, I will do everything you say. I ...
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How do I rotate the viewport, without leaving the x/y-plane?

I'm looking at an object, sometimes very close, to check visual heights. I'm in orthographic view, straight front. Now I want to rotate slowly to the left/right side, without leaving the xy-plane (...
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37 views

Rotate an object and move up local z axis at the same time

I need to rotate these two objects around the same pivot point with the outer object sliding up it's local z axis and ending up inside the inner object. I have tried using a transformation constraint ...
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How to use array modifier with follow path constraint (Cableway Chairs)

I am making a ski lift, pictured below. For the chairs, I am hoping to use a mix of an array modifier and a follow path constraint. I have tried to use a curve modifier, but this offsets the whole ...
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Can't edit speed of camera with keyframes

I've got a camera following a path in my animation, tracking an empty in the center of my scene. That all seems to be going well, and I've got keyframes set up for the beginning of the movement to ...
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How do I constrain the bone tip?

I want each bone to have its base constrained to a certain direction (acting like a sliding pivot) and its tip fixed to the base of the next bone and both moving along another direction. Basically I ...
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1answer
19 views

Combining Curve modifier with Follow Path constraint

Is there a way to deform a mesh along the curve but also move the object along the curve? if I add a Follow Path constraint with ...
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1answer
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How to get local rotation from Matrix but taking parent transforms into account

beI have this simplified blend file were I need to match the bone 'shoulder' to this other bone called 'shoulder_extra_snap': https://pasteall.org/blend/9f468cbe96f145eb9d77553f3ebf1b89 So, both ...
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Messed up camera orientations with Follow Path and Track To constraints

I’m having trouble setting up camera animations using the following setup: I’ve set an empty to follow a path, and a child empty to aim at target empties. Like this: Empty.Cam.Following Follow Path:...
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29 views

How to activate a bone in pose mode with Python?

summary How do I activate a bone in pose mode with Python? Specifically what I want to do I have many bones that have child of constraints. During the process of setting characters, I often need ...
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1answer
50 views

How to make assemblies from multiple objects?

I am working on a project were I need to render a product with multiple parts. Each part is a separate object generate in Fusion 360 and imported in Blender as a .obj file Now, I need to assemble all ...
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Why does baking the armature (as an object) stop the bones from moving?

I want to get rid of the Follow Path Constraint without while keeping the animation of the armature as a whole or as an object. In Object Mode, I baked it by going to Object menu > Animation > Bake ...
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Constrainted objects displaced during rendering animation

Faced the following problem. When I've rendered an animation, some details were not where they should be according to the timeframe. This problem occurs only when rendering an animation (3 problematic ...
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1answer
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Rigging - Sword like object influenced by 2 bones

As in topic. How to attach a sword to have it be influenced by two bones. Not off course in the same time. I was fighting with "child-of" constraint, but with no luck. Well it works, but if I was in ...
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Effect of child-parent on rotation constraints

Totally new to Blender, excuse the newness! I am watching a tutorial that shows how to make a finger with two joints using three cylindars and an Empty sphere for rotation controller. The steps: ...
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Damped Track constraint issues. Bone twists at a certain point

Having issues with the damped track constraint here. I want to be able to move it all the way around and have the arm follow it. However, at a certain point, this weird rotation thing happens. I don'...
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Constraints don't work on curved arrays

I'm trying to do some curved arrays: I need my duplicates to rotate ONLY horizontally, following the direction of my curve (Image green). I set the twist method of the curve to "Z-Up" which prevents ...
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Rigidbody that moves back to its original position?

Is there a way to make physic simulation that at first is falling to the ground (let's say 15 objects), then they are coming back at original position with dynamics? Some type of spring constrain ...
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How to attach bone(s) to object

Is there some way how I can attach hands to the winch? So hands will follow a winch smoothly and not weirdly shaking. Thank you.
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Rigging a tank on a basic level question

I'm trying to learn rigging, and only recently started familiarizing with bone constraints. I am attempting to rig a tank, and to not make things too advanced for me, the most complicated thing I ...
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objects with child of contraints “exploded” when I reopened my file

I have modeled several robotic arms. Each segment on an arm is an object with a "child of" constraint targeting the adjacent segment closer to the base of the arm. Everything was working and I saved, ...

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