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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53 views

location constraint adds too much offset

Consider i have two armatures side by side (different X values in Object mode), both armatures are in rest pose. Additionally the right armature (see image) has an additional Origin bone at <0,0,0&...
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Constraint Calculation

I would like to write a script which will effectively behave like a constraint but i can not (or i don't understand how to) find any information on how exactly the constraints in blender work, how ...
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1answer
41 views

Adjust Bone Roll with constraints

I run into an issue with bone roll when i want to retarget two rigs with different bone roll conventions. I actually am able to do the correct retarget by using a Python script. So, problem solved ... ...
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how to disable bone movement while keeping all transforms

(ignore the crazy proportions in this scene I'm just experimenting) I'm trying to make the hand IK bone (square) stay exactly where it is between frames 705-726. I have a few constraints applied to it ...
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1answer
21 views

Follow path object not following the path

I added a camera with a constraint to follow a path, but when I slide the offset factor, the camera stays still and there is a blue dotted line moving from the camera to the position the camera should ...
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1answer
26 views

Double interaction with cell fracture

what is driving me crazy right now is that I want to animate a vase that is pushed off a pedestal and when it hits the ground it breaks into pieces. To break the vase into fragments I used the cell ...
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1answer
33 views

Automatically run a script when an object is transformed or a condition is met

I am new to blender coding and I made a script to calculate a complex bone rotation. The script is intended to run like a constraint in the sense that it will execute only when the "target" ...
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24 views

Set object origin for all frames in the animation

I have a mesh sequence imported into Blender using Stop Motion OBJ. I also inserted a Bezier circle to the scene which I set as the target of a Follow Path constraint attached to an Empty (cube), ...
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1answer
35 views

Problems with Damped Track

I have 6 pistons set up in a circle which are split into 2 objects: the piston and the rod. Both are parented to individual plain empties, which have Damped Track constraints applied that point to the ...
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1answer
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Copy rotation keep offset for the bones doesn't work

I'm following this tutorial in making IK controls for the bones. https://www.youtube.com/watch?v=VVHKBSknFhA&list=PLyelx0TsmSpcgsINPt6fOh3yWjTjk2Nz9&index=7 The problem starts with 12:40 in ...
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1answer
70 views

Follow Path with Shrinkwrap Modifier

I'm trying to use a Follow Path Constraint on a Curve that is being Shrinkwrapped to a surface. When the Curve's Shrinkwrap Modifier is active, the object with the Follow Path Constraint is still ...
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1answer
28 views

Driver speed does not change #frame

I am driving an animated object on a curve through a follow path constraint via #frame in the offset. When I try to slow it down by typing #frame/10 or #frame/100 the speed does not change. What am I ...
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1answer
37 views

Sliding Points on a curve in GeoNodes

Is there a way to animate instance points on a curve in geometry nodes? I am thinking of something similar to the follow path constraint, with an easy offset value to manipulate. I have a curve object ...
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Make Soft Body more rigid in one direction

I want to make a soft body simulation that is very stretchy along Y and Z axis, but almost doesn't deform along the X axis - doesn't bend when pushed or doesn't squish. Think of a tube or a ring that ...
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23 views

How to stop driver's "TRANSFORM_FINAL" Error message from popping up in system console

There is a bone called CTRL_Head and it has Copy Location constraint. I added a driver to this Copy Location constraint's mute state. This driver simply checks scene's custom property and if this ...
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1answer
28 views

How to rotate an object arround own Z axis and arround another Object Z axis?

I am trying to animate the rotation of dancers , one in the center and 4 others arround a circle. The middle dancer rotates in the Z axis. The 4 others rotate also around their z axes and also around ...
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1answer
37 views

IK rotation control question

please see the picture below. there are 3 bones, bone A,bone B, and bone C.bone A is bone B's parent and bone A and bone B are connected. bone B has IK constraint and chain length is 2, target is bone ...
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2answers
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I can't get a shape to properly follow the path

I am trying to rotate the green rectangle following the circular path. Here is what I've tried so far Why the rectangle doesn't rotate? What I am doing wrong?
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1answer
26 views

Rotation Constraint Breaks When It's Target Gets A Copy Location Constraint

I'm trying to create an aim space rig where each bone points at a driver (in my case an empty). Blend File: Uploaded Blend File I have this setup: An empty (Target) that the system is looking at (to ...
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1answer
25 views

How to find out what functions exist?

I`m currently creating some shape key and trying to apply them with a driver. I want to find out $tan()$ function is available. How can I know what function that available in driver or anywhere?
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Tank tracks only move on one axis with constraints [duplicate]

Hi so I'm not sure if this issue has been solved in the past but I tried looking and couldn't find anything specific. My tank's tracks operate fine on the X axis and rotate the way tank tracks do when ...
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32 views

How do I "Glue" an object to the surface of a mesh that is using a modifier?

I am trying to stick a tree to a path as the path begins to spiral/screw along the Y axis. I have used the screw modifier to make the path spiral and then parented the tree using 3 vertices. This ...
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17 views

Copy transforms does not work correctly for my rig

I have been trying to make a FK IK snapping tool using this video https://www.youtube.com/watch?v=6vdHwHSMeRQ&t=68s However trying to do it myself I find that the bones with copy transforms for ...
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1answer
25 views

Camera not tracking empty

I want my camera to track the pillows on top of the bed so I added an empty and added a constraint to the camera. these are my settings for the constraint so that the camera points to the empty Then ...
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21 views

Setting the rotation at a particular frame for an object with constraints?

Can I enter e.g. a Z rotation value to set the orientation of a camera as it currently is, e.g. at frame 148? As far as I can see entering any rotation or location value will determine the initial ...
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1answer
28 views

Transformation constraint question

There are 2 cubes cube A and cube B. And cube B has a transformation constraint. target object is cube A. please see the picture. cube B needs to move faster than cube A when it moves in positive X ...
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21 views

Functional tracking eye rig

I have a pretty basic eye rig but it doesn't work with instancing and I will need a lot of these in the scene. Is there a way to do this with less parts or works with collection instances? It uses 1 ...
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2answers
58 views

How to snap/align to an edge procedurally?

With the srinkwrap constraint I can snap/align one object to another object's face (aligning with it's normal) or vertex. How can I snap/shrinkwrap an object to another object's edge aligning the ...
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How to use "shrinkwrap" constraint with "custom space"?

How to define the custom space in shrinkwrap constraint? When I select "custom space" from the list it says what I expect: "transformation relative to custom onject/bone/vertex group&...
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move plane with 3 tracking points without deforming it

I want to add images as planes onto a video with tracking points but I cant get the plane to move with them.
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1answer
63 views

Dragging towel across floor using cloth simulation

I'm attempting to have character model using a rag to clean floor and having the cloth attached to hand but dragging across the floor, the floor being the collision. I would only want cloth attached ...
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1answer
22 views

Limit Location Constraint vs Rigid Body anim

Can the limit location constraint be applied to an object that is participating in rigid body collisions? I have a rigid body ball that's bouncing up and down off of a spring-loaded rigid body paddle (...
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1answer
320 views

Rotate an object in the confinements of another object? (Paddle, Oar)

So in my case I have an oar and a brace, that the oar goes into. I want to animate the oar in a rowing motion. However every time I rotate the oar it goes out of the confinements of the brace. Is ...
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1answer
50 views

Rigid Body simulation with constraints exploding

I'm making an industrial lamp armature that is going to fall and when it hits the ground it will break. What I've done is make the mesh and connect everything in a Rigid Body simulation with ...
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1answer
25 views

How do you apply ChildOf evenly to an entire object?

I know that the title is a bad one! I am not sure what to call this. I have two models - the character and a quiver/bow. The quiver/bow object is using the Child Of constraint to follow the second ...
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35 views

Track to Camera

I tried to replicate a setup to smooth out a tracked camera which i used in 3d max. When trying to do it in Blender i came across some issues. In 3ds max i would copy the tracked camera and make it a ...
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0answers
117 views

Cannot Navigate Object with Constraints

I'm trying to connect the camera to follow a character movement, and I was also trying to figure out how to follow it with a constraint while in navigation mode/Walk mode, but it gives me an error ...
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1answer
103 views

How to get hair particles to face camera (billboard)?

I'm trying to do simple trees: I created a plane which then has a track to constraint to it which points at the camera, and that works fine. But all my particles still face the same direction. They ...
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42 views

How to combine rigid body physics of multiple objects with a follow path constraint?

I'm a relatively new Blender user. I've checked out other answers to similar questions regarding rigid body physics and the follow path constraint, but none of the answers seem to work for me. I am ...
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1answer
36 views

Why do we use IK in the lower arm (fore arm) bone? How to select IK bone?

There is no issue to be solved or artefacts to be tweaked. The purpose of this question is just to better understand how IK works. I'm just curious what bone should we choose to have the IK constraint?...
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19 views

How to parent a 3d character to a kick scooter bike?

The kick scooter is not rigged but I thought of setting it's child of constraints to the character's root bone and I'm not sure of it because I don't know which to move (whether the scooter or the ...
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1answer
42 views

Rigging exercice - Very simple setup creates a Dependency Loop

I'm trying to create four buttons (represented on the image below by the four bones). The bones are constrained in their local Y axis between 0 (corresponding to the "unpressed" position) ...
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1answer
39 views

Extruding a vertex at a given angle

I know I can extrude a vertex and type in the length but is it possible to extrude a single vertex at a given angle like 11.23 degrees and have it constrained to ...
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Possible Fixes? Older Blender File ... UI interaction .... Constraints indicators appear but cannot survive drill down .. Foreboding Console Messages

Old file opened in 2.9. Modified circ@ ‎December ‎‎2018. In the constraint panel I see 4 constraints listed. They cannot be opened. The error message in Console Window is listed below. Some other ...
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1answer
60 views

Where is Action Constraint "Evaluation Time" property on the action panel?

I am using version 2.9 and I cannot find the "Evaluation Time" Property for the Action object constraint. I saw in some videos and posts that it should be right under the "Target" ...
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20 views

Inherit rotation for Bendy Bone ends

I have a bendy bone rig with 5 bones. This rig is to animate a dancing soft drink tin, to music via MIDI (using TouchOSC from my iPad in real-time, and the AddRoutes 0.32 add-on from www.jpfep.net). I’...
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How to apply bone constraints and object constraints to the instances of my object?

Context I am using the CarRigPro addon in which I can chose the object that the car suspensions are simulated on. For that, I add my object (Ground) as the target for both a bone constraint, and an ...
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1answer
185 views

Trying to make a double pendulum swing simulation, but it keeps doing weird movements

So I'm still a beginner in blender and I'm trying to make a simulation of a double pendulum. My problem is that the swings keep glitching out of their positions and wouldn't swing properly. I watched ...
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1answer
68 views

Rigging - Copy Constraints in Version 2.80 and above

Many changes have been made since 2.80 came out. How do I copy constraints from one bone to another in versions 2.80 and above. using a keyboard shortcut as in 2.79 and below?
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115 views

How do I rig retracting cylinders so that I only need one control bone?

What I am trying to do is to move the three bones in the middle in and out, and I can do that right now, but one by one because it's an FK chain However I want the bone in red to be the controller and ...

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