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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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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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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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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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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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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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“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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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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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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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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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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Wheel rig broken. Wheel slips when rotating

just trying to rig a simple wheel that rolls in the direction of its parent mesh. The trick comes when I have the mesh follow a curve and then the curve circles around. I was trying to make a tutorial ...
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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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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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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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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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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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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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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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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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Two point tracking - resize bone

I have two point tracking in video footage. When I get closer to the tracked object, the points get further from each other. Then I have 3D object matched to those tracking points, so I want the ...
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1answer
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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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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 ...
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How to get an empty tracked by a camera to move smoothly between keyframes

I have constrained a camera to track to an empty, and I've constrained the empty to limit its distance from the camera to outside 5 m and inside 10 m. I have parented the camera with the track-to ...
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How to keep camera always in horizontal position?

The camera is following the path from top to the bottom, orbiting around the wires. I would like it to be focused all the time on the wires in horizontal position. Is there a way to exclude Z axis ...
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Does 'Inverse Kinematics' override other bone constraints?

Rig is for a quadruped, I have IK applied at second bone, but I want to place a limit on the to the toes, so that they can't go below 0 on the Z axis. Selecting the Limit Location bone constraint ...
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How to turn off camera's follow path constraint?

This question How can multiple Curves be used to control Camera movement? says that I can disable the camera from following a path by adding a keyframe and setting influence to 0 for that constraint. ...
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Is it possible to add a Child Of modifier without changing position of the child?

Currently, when I add a child-of modifier, the child jumps to the parent's head and rotates. Why is that? And more importantly, can I have blender not do that and keep the bone where and how it was, ...
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rotation copied every second circle

My question is pretty simple. How to make an object copy rotation of another object with same speed but only every second circle. I know I can animate that using keyframes, but I need to have in ...
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1answer
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What are the advantages of separating FK and deform bones in an IK/FK rig?

In an IK/FK rig is there any advantage to having a set of deform bones (DEF bones) that are separate from the FK bones? This is opposed to a setup where you have one set of bones you make FK ...
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How to maintain pose bone's rotation after Copy Rotation Constraint?

There is tow pose bone in the scene, child bone is child of parent bone, and child bone is use inherit_rotation. So how to maintain child bone's rotation after add Copy parent bone's Rotation ...
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What is the “standard 3-rig setup”?

The comment on this ticket states that lagging from cyclic constraints can be solved be using the 'the standard "3-rig" setup'. What is the specific setup this is referring to? Is it still considered ...
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Objects move when initial pearenting is done

So in the bone constraints tab I want to make a bone_a a child of bone_root and I have to use the Make Child Of constraint in the bone constraints tab because of how my rig is, but I do not want any ...
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Stretch or extend curves dynamically based on mesh translation (or rotation)

I recently started using Blender for a project involving multiple cables (or ropes) connected to the same object. Let's say, for instance, this is my set-up: - two cylinders containing a rolled-up ...
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How to maintain Pose Bone Transforms in this particular situation?

There is three pose bone in the scene: "Stretch Bone" "Parent Bone" "Control Bone"; Stretch Bone is Stretch To Control Bone; Parent Bone is Copy Transforms of Stretch Bone; Three bone are independent;...
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Constrain vertex positions to moving objects?

I have a schematic of a mechanism on which I would like to superpose an animated 2-D line drawing (a simplified representation of the mechanism). I'm struggling with a few things, including how to ...
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Why does it not work when I use two object constraints in blender to control one object?

I got a question, does anyone know if the option to add object constraints is limited to only one constraint of the same type for an object, because when I try to add two copy rotation constraints, ...
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how to see limit rotation range visual arc

With the IK restraint you can limit rotation and see the range displayed as shown in the attached picture as the red semi circles. How can you visualize those ranges with the "limit rotation" ...
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How to show transforms of Child Of or Copy Transforms constraint

I am trying to find a way to make the transforms from a Child Of or Copy Transforms constraint visible. Let's say the bone is in its default position and with the constraint activated changes to a ...
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Constraint's target problem

I have two objects, human and fridge. I want open the door of the fridge with my human's hand. So... I need to do two different animations, one for the human and one for the fridge. But i got a ...
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What is the efficient/fluent way to Fill (F) between something Zaxis locked with a normal vertex?

I would love to hear an efficient way to go about having this FILLED (F), thank you!
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Explain Limit Distance Constraint 'For Transform' Behavior?

The Limit Distance constraint does everything I want, except that it allows the location channels to go outside of it's bounds while posing. My understanding is that the 'For Transform' checkbox is ...
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37 views

Strange twisted bone with Copy Rotation

I'm trying to use the Copy Rotation Constraint to let an armature copy another armature. The problem is, that the copied bone somehow is turned like 360 degrees around the x axis. What could I do to ...
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Copy rotation rotates through wrong axis

I want to rotate hand bone when I rotate IK bone as well. So I decided to using Copy Rotation constraint. Here's how looks like: Nothing special, important thing is that Hand Bone has Copy Rotation ...
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Automatic Door closer - Constraint problems

I'm not very successful with a automatic door movement with constaints. Below you'll find some images where I'll try to explain the matter. Yellow automatic door closer, it has a motor and it turns ...
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Constrain two parts to slide against each other?

I have a model of a machine that needs revolute and prismatic (or slider) joints. The revolute joints are each a pivot with one rotational axis. The prismatic joints are each a slider with one ...
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About local space in action constraint

As you can see the picture below, if you change the rotation value by rotating the parent object (box), the rotation value of the child object (monkey) is retained. Child objects have their own local ...
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Rigid Body Constraints Rapidly Twitch

So I'm trying to make a simple car with rigid body constraints, but when the wheels spin they rapidly twitch around. Any help? Everything else works but I can't figure out this.
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Object with constraint CLAMP TO a curve does not behave correctly

The eye centres of my character are objects clamp to a curve and move from left to right following a control bone. When the armature is in the position the character was created, everything is working ...
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How to use spline ik with curve with modifer applied? (How to use splike ik, for snake movement animation ?)

I try to use Spline IK Constraint to make "Snake move". I have armature with 4 bones, and I apply Spline IK Constraint to it. Its don't want to work with curve after modification, it uses curve ...