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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117 views

how to rig a car engine piston [duplicate]

i need some help setting up what is basically the same as a piston in a car engine's cylinder. i know i can just use keyframes and NLA strips but im after a more dynamic approach that wont require a ...
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37 views

Bake bone movement

I have added bone constraint to make bone a child of a moving empty. For exporting purposes I need to bake the bone's movement into an action of the bone's armature (so I can delete the empty and ...
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Blender 2.9 Constraints always minimized?

Is there a way to always have all the constraints open ? In the new versions of blender 2.9+ constraint tab always has all the constraints minimized which i find really annoying due to the need of ...
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575 views

Bake animation from complicated IK rig to simpler rig for export to Unity

I made a character, gave it 8 animations that look great (as good as I could) in Blender and they break down in Unity. What else is new. The problem has to do with the constraints "fighting" ...
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33 views

Simulating piece of cloth between two moving points

I am trying to simulate a piece of cloth with two points of control. The controllers will move towards each other, leaving the straps to loosen and fall on the ground. I want to then animate the ...
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Hi, Is there any way to know how many objects are referencing other object?

Example- I have a object named Master. Master object is used as a reference in many drivers and constraints(like master object rotation is used in some driver and it is also referenced in constraints ...
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261 views

How to export animations with bone constraints for Unity?

I'm using Blender 2.82a and I've made first-person arms for a game I'm working on. I had to add bone constraints to avoid the infamous wrist-twisting issue (copy rotation). All of my animations are on ...
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62 views

Creating dynamic coordinate vectors

I would like to make an animation similar to this one(This was made on manim). The white line from the origin should be a 3D arrow object tracking the position of the blue cube at every key frame.(The ...
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Not able to set Follow path constraint

i am trying to pan my camera around my Falcon 9 , but the follow path constraint's Target is not listing the curve visible in the photo
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Primitive shapes whose parameters are dependent on their relative postiton

Fist time posting. I love Blender (a hobbyist new user making stills and stuff) but if it is not the right software, feel free to send me off. I'd like to have a sphere and a cone whose base is formed ...
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62 views

How to stop eyes clipping through head mesh?

So I created a character using MakeHuman and imported it with its rig into blender. I needed to create a way to control the pupil size so I modeled separate eyes and have the system working. However, ...
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Custom bone controller : parenting/space issues

I've a project in blender wich is driving me crazy. I'm animating an hornet and I'd like to have custom bones acting like controllers for the wings (kind of buttons to drag along axes to get a nice 4 ...
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Armature set up for animation

Ive set up the bone structure. From what i understand is that i can use the inverse kinematics restict the movent along the z and x avis and only allow the pivot along the y axis. But the main big ...
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Old Style fan system bone/armiture set up

I need to animate this old style Indian fan. The crank shaft would need rotate 360 and the flat plane (aka the canvas fan) would need to sway back and forth. I've set up the bone structure. From what ...
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100 views

Animating active object in physics simulation

I would like to pick an object from a conveyer belt.but I find difficulty in animating the active object(rigid body simulation) and assigning 'child of' constraint to the active object which in this ...
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The Armature deforms my object unevenly, no matter what rotation I try. What am I missing?

I'm trying to animate a book opening, and have tried multiple different ways, but I can't get rid of this issue. The armature closes one side of the books crooked and the other straight. I have no ...
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Drive value to follow path while driving object?

I’m working in a portable conveyors like this: Source: https://youtu.be/I1LRYNS4ndo I used copy rotation to expand it and a driver to active it, but I don't know how to make it follow the bezier ...
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37 views

Armature constraints not rendering

Apologies if this is a simple 'duh' question as this is my first time rigging in Blender (or using Blender at all) This character has a hat and hair that don't really need to deform, so I attached ...
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58 views

I can't seem to reset the position of the control bone

I have made a foot control rig here, but I try alt-G, and alt-R and it does not reset the pose. I even tried resetting it from the pose menu up there in the top left. Any ideas? I'm just sure it has ...
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Lattice control of multiple objects without distortion

what i am doing : I am looking for a simple way to animate a cobblestone floor ripping apart in a specific and easily controllable way. I currently have broken down the floor into segments, each ...
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Avoid armature deformation after add Track to Constraint

actually I want to add multiple empty controlers for each bone in armature actually I can do all Track To bone constraints but I get unwanted deformations after checking, the problem is with the ...
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1answer
24 views

NOOB: What method for constraining?

I am new to Blender. I have made strides learning modeling and material creation, but now looking to take my modeling a little further. I want to be able to create a complex model with multiple ...
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214 views

How to change the direction of motor rotation?

What am I trying to do? I tried make a small motor (2cm) because I need simulate (physics, not only animation) this, but I can't its rotation correctly. See in the image, I have a "Motor Body&...
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1answer
86 views

Inverse Kinematics locks ignored

Here is a very simple leg. Leg.lower.L has an ik constraint applied, of chain length 2. Foot.L has no ik applied but copies its rotation from IK_Foot.L As discussed here here this enables the ...
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1answer
240 views

How to limit rotation on the last bone of an ik chain

The last bone here, Bone7, has an ik constraint of chain length 3. As in the image, moving ikBone moves the bones all the way back to bone4. This makes me think that the length of a chain doesn't ...
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Can I limit what IK bends? Need bones to only move certain way

I was working with a model of a robot arm type thing, and wanted to use an IK constraint with an empty as the target to assist in posing. I abandoned the idea because: The IK constraint seems to run ...
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172 views

Landing Gear Rigging Constraints using empties

So, I am working on a landing gear structure. I am using empties to connect the various parts. One in particular I am having trouble with is the "torque arm" which is supposed to move up and ...
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Animating Violin and Bow - Constrain Rigid Body Between 2 Moving Points

Here is a challenge for animation gurus...I am attempting to add a violin and bow to a model with a mocap violin performance. The Mocap has worked quite well, and I have been able to rotate the and ...
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Pole target prevent IK restraints

I'm trying to rig a character and I encountered a rather annoying problem: I followed tutorials to create IK and pole targets etc And it work fine, except: if I use pole target the IK constraints will ...
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Bending a bar with a torus attached to one end

I'm an absolute beginner with Blender (5 days so far) and I'm hoping someone can help me. I'm trying to bend a flat bar with a torus attached to one end. I used the bend feature in the "simple ...
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2answers
214 views

How to Join two Armatures without losing constraints in Blender 2.8?

I want to join two separate armature objects, But when I join two armatures using "Ctrl + J" then the bones with constraints not working properly.Also I renamed all the bones differently. Is ...
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1answer
353 views

How to prevent Parent bone rotates the child bone in pose mode in Blender 2.8?

As you can see in the figure 1 , I have one child bone connected to the parent , Although I locked all the rotation axis(fig 1) and applied limit rotation constraint to the child bone; when I move ...
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196 views

How to get rotation of constrained object?

So let's imagine I have a gun pointing at a target. Gun has copy location constraint to locate to another object that rotates around the same axis as the gun. Gun has track to constraint to keep it ...
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1answer
221 views

Move object in direction it's facing in

Is there any way to change an object that is moving forward change its rotation and continue to move in the direction it is facing in, as if it was moved according to local coordinates? like a vehicle ...
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59 views

The bending direction of IK constraints

I modeled the octopus and I am working on rigging. I applied IK constraints to the legs and the direction in which they bend is as shown in the GIF. This is generally good. However, my octopus ...
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How to make one bone “push” another?

I'm very new to Blender and try to learn to make some stuff. This is what I have as an in-progress "proof of concept": Three cylinders(top, middle, bottom) linked to three bones. All bones ...
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41 views

Blender 2.8 which processes fastest, skinning or bone constraint?

Just out of curiosity so as not to slow down Blender needlessly: When rigging solid parts of a character like a robot, which will run fastest: Mesh that is bone constrained to the bone ? Mesh that is ...
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594 views

Why do I get a 'Failed to set value' error when trying to add a 'Copy Location' constraint to my rig?

I'm trying add a Copy Location constraint but it doesn't work. I am making a metarig like in the video but if I press enter its cast nothing happens. I tried picker thing I get this error: Blend file ...
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Make an object Always face the camera, and always be upright?

So I'm planning a new portfolio piece, and for it to turn out how I want, I need some help with constraints. There is going to be a star that always faces the camera, and that much I figured out. The ...
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I want an object to be both animated and controlled by a motor

I have an object (cube) that I have made an active rigid body. I connected a motor to it and it rotates when I have dynamic selected and animated unchecked. If I check animate it will animate (I'm ...
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1answer
106 views

How to make characters hand/pass each other objects

I've been animating a scene and currently have a character holding an object using the child of constraint. Is there anyway I can make the character pass the object to another character (they use the ...
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1answer
209 views

Damped Track on object in armature moves in unexpected and irregular way

A problem arises when I move the arm of a robot I am animating. A piston connected to (and a child of) this arm has a Damped Track on it. When the arm is moved using it's IK armature, the piston ...
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252 views

How to use “Context Override” on the “Disable and Keep Transform” operator?

I am trying to make a simple panel with buttons for snapping bones between IK and FK configurations, and I need to change attributes of bone constraints with python scripting. I can quite easily ...
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1answer
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Create still copies of a moving object (using python scripting)

I have an object A that is constrained to move on a path and I want to create still copies of it while it moves on the path. I tried the following code but it failed. In particular, it arbitrarily ...
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1answer
118 views

during copy transform constraint, the child object snaps to the origin point of the parent object

When i use the copy transformation constraint, the child object snaps to the origin point of the parent object. What i want is, when i constraint an object, the child object should remain where it ...
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1answer
50 views

Help with rigging 3x3 bones and root in blender

recently I started Blender and I want to recreate a simple rig I already did in Houdini. Unfortunately I am not able to recreate my setup so I am seeking advice on several issues. First of all I have ...
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How to keep triangles connected and the same shape, while modifying/transforming?

EDIT: All green triangles should keep the same shape as the purple triangle. They may not deform in any other way than location and rotation. If I work with modifiers the triangles keep deforming. I ...
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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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2answers
579 views

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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