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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91 views

Is it possible to make floor constraint base on surface detection?

Let's say I created a plane as the floor And then I created a cube. Instead of detecting the center of the cube against the floor, can blender use the surface of the cube.So whenever the surface of ...
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1answer
50 views

Constrain point to surface

Is there a way to lock a vertex from object1 to the surface of object2? More specifically I am talking about the end of a spline which should be locked to the surface of a mesh (not only a single face ...
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2answers
244 views

How to make non-linear movements with a Follow Path constraint?

I try to achieve a non linear movement with the Follow Path constraint. I linked my object to a bezier circle using the Follow Path constraint. It follows the circle with a linear movement, meaning ...
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0answers
24 views

How to limit velocity on an object (Sphere)

I am new to blender 3D animation and I'm trying to create a basic animation using multiple spheres. My spheres animation has to respect a few constraints: Each spheres has to keep their distances ...
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1answer
123 views

How do I center an object in its parent?

I have 2 objects. Their dimensions are completely identical. I have applied all transformations, rotations and scales. Their locations are 0, 0, 0. I have tried parenting the objects, both in ...
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1answer
34 views

What bone constraints should I use?

I'm trying to setup rigging a scales. I have 2 main bone (pan and indicator). I want indicator to rotate when pan move up - down and I even want indicator rotation makes pan move up - down when I ...
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24 views

bone constraints get messed up when baking animation

On the video, you can see I have selected the bones which have weightpaint (I think I have all of them, I did it by hand...) from my blender humanoid rig. I also have bones for the swords of the ...
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1answer
61 views

How can I populate a model with smaller models?

My mission here is to use this Atlas model as a rough container of lego figurines. There are at least two sub-objectives that need to be accomplished: Fill Atlas object with particles represented by ...
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0answers
28 views

Don't let FK arm controllers clip through objects

I'm having a bit of a hard time with a lot of animations which involve sitting people on a table. Problem: I want the table to be no passable by specific FK controllers, like the hands (and maybe also ...
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2answers
81 views

Spheres facing to camera

I need those spheres facing to camera so I can see the letters all the time. I guess I need to use constraints but not sure how (I'm a newbie, yes) EDIT: I know Damped track do it but I need it in all ...
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22 views

Constraining axis on rigid body

I've been trying to roll a sphere down a slope and I want to constraint axis of rotation (so that it doesn't veer off course) but adding rigid body constraints (generic) or regular object constraints (...
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1answer
139 views

How to keep certain faces planar while decimating mesh

For a papercrafting application I need to decimate (collapse) the geometry in order to reduce the number of faces. The original geometry looks like this: When applying the decimate modifier (with ...
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0answers
26 views

Access to constraint modified value

I modelled a window and add an armature to it. There is a bone called Window that's used to open the window and a bone called ...
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0answers
86 views

Child of constraint with bone is not following the parent

I'm doing a simple ball pitch animation. I tried to do child of constraint for the ball to the hand, it works till set inverse step and comes back to its original place. But when I try to move the ...
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1answer
63 views

Copy Rotation Constraint not working when paired with a Shrinkwrap

So my scene is a boat on an ocean modifier. I have a shrinkwrap modifier on a plane, the rough size of the boat, directly under it. Vertex group has been set. Plane is subdivided. Boat is not ...
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1answer
52 views

Is there a way to get the shrinkwrap constraint to move the target to the object rather than the reverse?

In the image below there's a cuboid that has a shrinkwrap constraint to a distorted cylinder. As I rotate the distorted cylinder in the x-axis, the cuboid moves up and down following the uneven ...
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12 views

Getting Copy Transforms + Stretch To to work consistently during a render?

I figured out this way of making things slightly lag behind. It's quite nice and easy to set up, and I can move stuff around in real time. Everything would be alright, but the system simply does not ...
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1answer
58 views

Objects tracked to camera track to the viewport camera at current frame instead of camera location at the frame it should be rendering

I've created some text objects and to make sure they are always facing the camera I have them tracked to the camera with some constraints. I've tweaked the constraints until it looks fine in the ...
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1answer
235 views

How to remove IK Target after a certain point without breaking the animation?

I'm creating a siting animation for a dog, I used a IK target to lock his his right leg to a specific location when i was animating his left leg. everything is fine and animation is going how I want ...
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1answer
356 views

Active dynamic rigid body object does not move since linked to armature

i have tried everything and it does not move as an dynamic active object. clear parent does not help. it has an "child of" object constraint: There is no passive object. at least not yet. ...
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0answers
24 views

How do I set an object to move along an axis by changing the rotation of a different object?

So I'm trying to model an aperture like shape, and am setting up constraints to go along with it. After a long bit of trial and error, I found out I could use the copy rotation constraint all set to ...
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0answers
58 views

Action Constraint won't select Action baked from Copy Transform (2.8)

I'm trying to turn a mesh's action into an action that corresponds with a bone in my rig. I duplicated the bone in Edit Mode, separated it into it's own separate armature. We'll call this RefBone. I ...
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0answers
40 views

How to make that wheel follows road bumps [duplicate]

I'm working some simple project where I have a car which driving on road. Road has bumps. Of course, as rookie amateur :) , my wheels sinking into bumps. I tried various methods I found over internet, ...
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1answer
145 views

Rigging two-handed weapon in Blender 2.8

I'm having trouble with rigging a two-handed weapon in Blender 2.82. Basically, I want to achieve this: Such gif was retrieved from a previous questions and answer, but the solution applied for a ...
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265 views

Copy Rotation Constraint with Offset doesn't work like expected

Trying to constraint deform armature with bad bone rotations to a copied but fixed armature with proper bone rotations for animation. Some kind of puppetering. (I can't change position or hierarchy of ...
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0answers
25 views

Camera not staying on nurbs path

my camera won't stay exactly on the nurbs path (there's a small space between them) and then it randomly jumps onto it near the end. I've checked for any rogue keyframes, cleaned keyframes and made ...
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13 views

Strange results with hinge and rigid bodies

Can anyone explain me the reason for the strange animation I get with the Blender file you can retrieve here?
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0answers
12 views

Animation problem when open the scene from other pc

I have a scene with character animation (rigged with "Blenrig") done by my friend , all works fine on his pc , but when I open the scene on my pc , the eyes main control animation is wrong , ...
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2answers
38 views

How to create stacked rotation with bones? (similar to array mod with object offset)

I'm trying to achieve this kind of stacked rotation that you would get when using an array modifier on an object and having the offset controlled by another object. This is for a spine of a character. ...
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1answer
61 views

Move one object and second object on the circle path will stay in nearest distance to first object

I want to do this: I have got one object (Empty.001) and I want to move this object only on circle path. I have got second object (Empty) and I can move this second object without limitation. I want ...
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1answer
297 views

Rope Simulation Using Rigid Bodies

I'm trying to model a rope used for a guillotine - after a bit of research I've attempted to model it using a series of rigid bodies connected together by empties acting as POINT rigin body ...
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1answer
185 views

Is there a way to delete bone constraints by name?

I'm trying to delete all bone constraints containing part of the name 'Action' for selected pose bones. I'm still learning scripting and this is the best I could come up with. Any pointers would be ...
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0answers
16 views

Uniform rigid body constraints

is threre any way to connect a lot of pieces (like fragments form cell fracture) together with rigid body constraints uniformly? When you normally use connect, its just connects all fragments to the ...
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0answers
27 views

Imported model has bone fixed on point - how to fix it?

So I imported a model through an XPS plugin for Blender, and I tried to move one of the Joy-Cons via a master bone, but it's fixed in one point, so I can't move it aside from rotation. When I do move ...
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33 views

One rig, 4 meshes. Animation gets baked only to one of them and doesn't work in Unity

This one has taken me hours of trying and research and finally I decided I should possibly ask for help with it. I'm trying to make a set of simple animations with blinking. Issue: I have 4 meshes (...
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0answers
23 views

Limit Distance to object non uniformly

I need to constrain an object (an empty controlling the location of an object) to an empty, but I need the limit distances to vary per axis. The limit distance constraint only allows for uniform ...
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0answers
118 views

How do I make Hinge Joints, like an elbow or knee, restricted in rotation, but have IK?

I'm fairly new to animating in Blender, so I figured it was about time I learn more about constraints and switching between IK and FK. I just recently figured out how to switch between IK and FK, and ...
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0answers
83 views

Location Constraint Offset In Wrong Position

I would like a bone to copy the location of another bone, but I would also like to be able to manually edit the location later if need be. However, under the copy location constraint, every time I ...
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1answer
103 views

Limit Rotation Local Space Not Working

I am creating an airplane 3d model and I am rigging the wing flaps. I am using Object Constraints to rig the flaps. I have added an empty as the Rig Controller, and have rotated the Empty so that it ...
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4answers
929 views

My faces won't fill ( Blender 2.9)

Working on a human character and when i try to add faces to attach the body it wouldn't work .. Tried F , Alt + F. Relatively new to blender. Also tried on a basic cube still won't fill in faces.
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1answer
48 views

Learning Rigid Body Constraints (Slider & Piston) - Active object keeps passing through passive?

So I'm trying to teach myself some basic rigid body physics with rigid body constraints. I have a 2.83.4 .blend file with several collections (one for each constraint I'm trying to understand) and I'm ...
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0answers
17 views

Is there any way to restrict the movement of a object to a specific custom plane while maintaining distance?

I want my outer sphere to revolve around the center sphere like earth does to to sun while maintaining same distance and on the given custom plane. I tried using limit distance constraint but it ...
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1answer
82 views

Where are Blender 2.79 and later rigid body constraint angular limits documented?

Summary I can find no documentation on the frame of reference for defining the rigid body HINGE constraint Z axis rotational limits. Blender defaults these to lower = -45 deg and upper = +45 deg. ...
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1answer
106 views

Child of constraint not working for two handed object holding

I'm trying to get both hands on the sword handle the first arm works but the second arm only the rotation of movement will be applied here is what i did : 1- made a bone for the sword handle. 2- made ...
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0answers
46 views

confused with copy rotation

I have 2 plane on top of each other. Im try to rotate the below plane so that the top plane also move up and rotate in the same angle 45 degree as shown below. I try to add a copy rotation constraint ...
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1answer
35 views

Child of Constraint influence value doesn't recorded as keyframe

I'm trying to make a reload Animation but when i set child of influence of magazine at start of animation at 0 and press I to record keyframes , and at ejecting part of animation when i set it to 1 ...
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1answer
35 views

Blender Path Deform Bone Contraint Deforms Mesh

I am making a tram model to follow a path, so the "cars" turn naturally. I found this tutorial on Youtube and I have followed it to a "T", but something has gone awry. When I turn ...
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2answers
182 views

Rigid Body Constraint: how to prevent stretching

I'm trying to use Rigid Body Constraints (type=Fixed) in Blender 2.81 to connect an assembly of rigid and cloth components. a crinoline cage By Crinoline, 1860-1870. Jacoba de Jonge Collection in ...
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0answers
84 views

How to rotate mesh which has “Clamp To” constraint

I'm trying to use constraints to create animations like in the example: (I used shape keys in this example). I dont want to use shape keys since I want to use the moving parts as a target for the &...
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1answer
116 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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