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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. Use this tag for questions pertaining to constraints and their usage within Blender.

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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 ...
MiyaCNG's user avatar
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Point particles to empty

I am making a colosseum with a crowd inside. For the crowd I am using an emitter and I have a few very low poly people objects in a collection. The problem I am having, is that they are all facing ...
Ties Flippo's user avatar
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2 answers
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Why does my camera start rotating randomly when following a path?

I have a camera that follows a bezier curve with a Follow Path constraint, with a Track To constraint that follows an object (named "Viewer") moving on another bezier curve with another Follow Path ...
Squirrel's user avatar
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Is there a way to change the number of significant digits shown (for the follow path constraint)?

I'm using the follow path constraint on a very long path. I would like to see the offset with more decimal places when I'm changing frames. Is there a way to increase the number of digits shown? If ...
Ed Tate's user avatar
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Removing constraints & adding objects to group by python

I have a very basic script which I hope to do a couple things at once, but I am stuck at removing the constraint, and the group_link fails. bpy.ops.constraint.delete() and obj.group_link(group='...
V453000's user avatar
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1 answer
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Camera track to constraint in the game engine

I have tracked camera to track a ball. When I move the ball manually, the camera tracks it. But when I apply motion using w,a,s,d keys to move it top, left,down and right, the camera stops tracking ...
Gauri Chitale's user avatar
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1k views

Multiple Limit Distance Constraints

I will say that I've looked at a question called, "Distance constraints between objects/vertices/edges," but it didn't help. I am not sure if this is a known bug or if it is meant to be this way, but ...
Shady Puck's user avatar
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How to Move Bone Joints in Pose Mode like in Edit Mode? (without scaling)

I wonder how to move bones in pose mode like as you would grab the tips in edit mode and move them but without scaling the bone. Tried to set this up with damped track or ik rig. At both the target ...
Jonathan's user avatar
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How rely the orientation of an object facing the camera to the side it's looked at?

Use case / goal See the images below. The green plane is attached to a target, the grey sphere, and is facing the camera, but its orientation change depending on witch side of the target the camera ...
nliautaud's user avatar
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Can NLA strips be combined by transform matrix?

When I add two action constraints to each bone in an armature, they combine as expected and as described in the wiki, that is, translations are added, rotations are "added" (whether Euler rotations or ...
user2377's user avatar
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Soft body cloth meshes being affected differently to each other

I have created four objects using soft bodies to simulate cloth which are being affected by force fields (wind) but two are behaving abnormally and I do not know why. I have posted images (click for ...
Lindsey's user avatar
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Constraints (Transformation) are not working as expected

Help me understand the constraints. My wheel is attached to the empty box so that it rotates along the forward x-axis as the empty box moves LOCALLY forward (direction - minus Y ). And everything ...
arachnoden's user avatar
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Mirror expression

How can I rewrite an expression? I have this expression written by Leander min(1, max(0, Rest - CL) / max(0.001, FL-CL)) * 0.1 It drives a variable bone from 0 to ...
ben's user avatar
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1 answer
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How to stop a face from being affected by transformations?

I have a Muscle that I'm using Bendy Bones to transform. and was wondering if there was a way for me to make a face not be effected by it. So it doesn't do this In ...
a9e10n's user avatar
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Copy Rotation to Only Z Axis Not Working as Expected

I'm trying to get the selected ring in this picture to only rotate on its Z axis whilst tracking the lower mounting to the leg. What should happen is that the ring rotates so that the hydraulic, which ...
DrIgnatiusCole's user avatar
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336 views

track to constraint rotation values

New Blender user here. (please be gentle) I'm using a "track to" constraint to point an empty at another empty. Works exactely as expected, however the rotation values of the constrained ...
MattL's user avatar
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Align Camera Angle to Averaged Normals for Small Area Below Camera

Background: I have a large terrain mesh (~6M vertices) which I would like to "drive" over with my camera. The mesh was sourced from a high quality physical terrain DEM. I am using the ...
ProlificSwan's user avatar
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Where is Offset option in Copy Rotation in Blender 2.92

I am watching tutorial and he checks Offset option in copy rotation so he can independently rotate that bone separate from Control bone, but there is no option in Blender 2.92
Radoon's user avatar
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How to copy constraint to other object and keep the drivers?

I add a constraint to an object, and in the parameter i attach drivers. Now when i copy/paste this constraint to other objects, all the drivers are gone. The drivers are converted automatically into ...
andio's user avatar
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Armature with multiple root pivots

I am currently trying to rig a skateboard as realistically as possible. I want to be able to move and rotate everything with the Root bone (the object / "skateboard" in the picture is ...
Doe's user avatar
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How can I preserve the surface area of a mesh while editing it?

I'm trying to model a coat and I'm having difficulty creating folds while preserving the surface area of the mesh. Is there some sort of way to restrain the amount edited within the original surface ...
Hank The Tank's user avatar
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59 views

Array animation along path

I have a single curve object and while I can set an array of objects to follow the path, I seem unable to combine this with a Follow Path constraint (as I wish to have them follow that path animated). ...
Jonas's user avatar
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46 views

How to make two objects acting like parenting to each ohter?

I understand parenting two objects Circle A to B Circle B to A will result unwanted behavior. But let's say I want when Circle A rotates, B will follow, and it should work the same when Circle B ...
Juan Feju's user avatar
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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 ...
karan sharma's user avatar
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146 views

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 ...
Felina Faerlaingal's user avatar
2 votes
0 answers
1k 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 ...
CPCN's user avatar
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35 views

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 ...
Raff's user avatar
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2 votes
0 answers
1k views

What is Local space in constraints?

According to Blender's manual: Local Space is the parent of the object (or bone) is the frame of reference. Location is relative to the parent object origin. Rotation and Scale are oriented to ...
Stefare's user avatar
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72 views

Forcing two cylinders to touch when modeling

As the title said: how do you force two cylinders to always touch while modeling. What I want to achieve is that I can move or rotate one of the cylinders during modeling, but with a constraint so ...
Cubedsheep's user avatar
2 votes
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498 views

Can I use offset instead of y to map texture in displace modifier?

I'm animating a fish to swoosh around as it moves forward using a displace modifier (like here: https://www.youtube.com/watch?v=58lc8sLpJzY). The problem is that I want it to go in a circle using a ...
Rolf's user avatar
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How to constrain vertices of an object to tracked point

I have a video where I'm moving my fingers around (4 points) and what I want to achieve is having an object whose vertices I want to move using my fingers. I already set up the tracking of the points ...
Marcus Hamelink's user avatar
2 votes
1 answer
88 views

Pause in relationships and constraints

I want to talk about relationships between (for example) two bones. There are two bones (A and B), bone B has a Cconstraint, bone A is the target of that Constraint. Let the Constraint be "Child Of". ...
Arthur Shapiro's user avatar
2 votes
0 answers
264 views

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 ...
baklan's user avatar
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2 votes
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675 views

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 ...
J. SungHoon's user avatar
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2 votes
0 answers
151 views

How to make arrayed objects have independent rotation

How should I go about making an array (Modifier) of objects have independent rotation? The base has a "Locked Track" constraint to an empty, but if I move the empty (to move rotate the base) it only ...
ParallelMayhem's user avatar
2 votes
0 answers
104 views

Limit rotation doesn't work properly

I'm working with car animation. I parented brakes to the wheels and add "limit rotation" for X and Y axis And its work fine when car moving along -Y direction But flickering from 0 to 180° on z axis ...
Rumen's user avatar
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2 votes
0 answers
2k views

How can I attach an object on another object?

I'm trying to attach an object to another object. In my scene I have an object that must follow a rig. This object should get a glare effect, which is why I can not join the object with the rig. So ...
Speedys Edits's user avatar
2 votes
0 answers
549 views

How to constrain hair particles to an object

I'm looking for a way to modify hair particles similar to an armature system or the mesh deform modifier. In the screenshot below, I need the ends of the hair particles to follow the object. Is there ...
MooKorea's user avatar
  • 110
2 votes
1 answer
909 views

How can I duplicate and translate a selection of edges constrained to the original mesh?

I have a rather large selection of edges on a subdivided plane. I would like to have duplicate edges right next to the original ones (on the same plane). In other words, each of the original edges ...
user avatar
2 votes
0 answers
148 views

Copy rotation From child to parent without IK

I made a constraint on the shoulder bone of my character so that when the forearm bone moves, the shoulder follows the rotation with 50% influence. But it causes a dependency cycle and the movement ...
Jose Tomas's user avatar
2 votes
2 answers
2k views

Move/rotate object depending on another object

I have an object Cube with copy transforms constraint targeting another object Empty. The constraint is disabled, so when I ...
Tak's user avatar
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2 votes
0 answers
256 views

robot with scissor lift legs, problem with constraints and parenting

I'm trying to make a robot with legs like a scissor lift, so that it can stretch up. I'm using constraints to control the legs stretching. the rotation is controlled with a copy rotation constraint ...
The Joseph Dias's user avatar
2 votes
0 answers
387 views

Is There any way to convert a completed rig into a re-generatable python file?

Currently Rigify allows for the regeneration of custom designed metarigs (Encode Metarig (or Sample) to Python). This is a GREAT time saver, but There seems to be no way as of yet to do the same with ...
Jet Jay G.'s user avatar
2 votes
0 answers
1k views

python: get global position of parented/constrained object

I'm trying to find a solution to this other question I have. How can I get the global position of an object, that is either parented to another object (i.e. the child's global position) or has its ...
michaelh's user avatar
  • 1,959
2 votes
2 answers
613 views

How do I get an object to stay put when keyframing child of constraint influence?

I am a new animator doing some Minecraft animations. One problem I ran into was that when I keyframed influence at 1 and next frame at 0, it moves drastically when I move it to 0. Is there a way to ...
ToppolTheCat's user avatar
2 votes
0 answers
772 views

Rigid body constraint not working

I want some physics with movement in the z and without rotation in the x and y. (SO basicly 2d physics). I added a rigid body constraint but for some reason it is not working and I can't figure out ...
clankill3r's user avatar
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2 votes
0 answers
332 views

How to make gear constraints that work both ways?

I have this gear setup: I call the top gear the Rack and the bottom gear the Pinion. I can set a Transformation constraint up so that if I spin the rack, the pinion spins too (in the correct ...
Somatic's user avatar
  • 2,592
2 votes
0 answers
340 views

New BGE mouse look actuator causing camera shake

Bone-parenting the camera to an armature being rotated by a control object with the “mouse look” actuator on it causes the parented mesh shake all over the place, at least in my experience, I'm on 2....
pinsgta's user avatar
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2 votes
0 answers
283 views

Animating wheel rotation with transform constraint to a proxy rigid body

I'm animating a car to collide with some passive object. The car is parented to a proxy rigid body object, which I'm animating for the first part, and then the animation is turned off so the physics ...
pdlarry's user avatar
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2 votes
0 answers
211 views

Camera object askew (does not match pose specified by its global transformation matrix)

I ran into a (to me) really strange problem. I have a camera that is located at the origin. With various constraints I animate the camera's path to be that of a kite flying an 8 shape pattern (so it ...
nilsoe's user avatar
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