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Questions tagged [bones]

Bones are the individual sections of an armature that are used to deform the mesh. Bones act like other objects (they have properties and can have constraints) but are invisible in the render.

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52 votes
2 answers
52k views

How to make rig that reacts to gravity or seem to behave physically correct?

Here's a nice, strangely familiar hat. It's rigged with three bones. Let's say I want the hat to fall like a real hat would, and bounce around when the character which it's attached to moves. I could ...
Poyo's user avatar
  • 1,595
21 votes
5 answers
122k views

Join bones in a armature?

I have a simple armature that has three loose bones that I would like to join at one joint. Is there a way I can join these 3 into a single joint?
Vader's user avatar
  • 14.8k
21 votes
3 answers
26k views

Is there a way to convert a constraint to a keyframe?

I have a model in Blender with a full rig, including IK bones. I also have a sword with two bones, on the top bone of the sword I have a set of constraints that copy the location and rotation of a ...
Goff's user avatar
  • 313
20 votes
2 answers
60k views

How do I parent another object only to a specific bone?

I have hands model which I rigged, now I want the gun to be parented to the left hand, where the problem occurs as left hand is the same object with the right hand, so by parenting the gun to the bone,...
A.D.'s user avatar
  • 3,528
20 votes
1 answer
17k views

How to Set/Calculate pole angle of IK constraint so the chain does not move?

How to calculate the exact pole angle so when I add Pole bone the IK chain does not move?
Jaroslav Jerryno Novotny's user avatar
18 votes
5 answers
56k views

How to recalculate automatic weights for single bones?

After I edited an already weighted model and its armature, the pose mode doesn't grab the limbs the right way anymore. Is there a way to recalculate weights for single bones? Because I already edited ...
xDonnervogelx's user avatar
18 votes
2 answers
73k views

How to assign vertex group to single bone

I'm trying to animate a simple character in blender. I made a very simple armature, with a bone for every moving part of the mesh. Each moving part is "stored" in a vertex group, and I would like to ...
SoulOdin's user avatar
  • 329
16 votes
1 answer
10k views

Animate the parenting of an object

let's say we have a magazine, a gun, and hands. The magazine is parented with the gun. When I make an animation of reloading, I want the Magazine to be a parent of the hand, then after the magazine ...
Knuckles209cp's user avatar
16 votes
2 answers
2k views

How to simulate Miura-fold

I'm hoping to find advice here for simulating the Miura origami in Blender. I have searched quite thoroughly on methods and have only come as far as my failed attempt in my attached image above. The ...
Chlyxu's user avatar
  • 165
15 votes
3 answers
11k views

How can I manually calculate bpy.types.PoseBone.matrix using Blender's Python API?

I have this .blend file which has a simple scene, and a python script. There's a readme section in the script, but to give a general idea: There are two identical meshes in the scene, one skinned, and ...
fergal's user avatar
  • 647
14 votes
11 answers
81k views

My Rig Changes Position in Edit/Object Mode?

I have a rig, and when I select the Armature or the Model, and go to edit mode, they move position. They just go to the left, and they come back in object mode.
blackhole's user avatar
  • 2,400
14 votes
5 answers
17k views

Three bones following a curve

I have a chain of three bones and I want them to follow a curve (bezier curve). I've tried to do this creating a bone constraint follow path but it doesn't work. I'...
Andrea's user avatar
  • 751
14 votes
1 answer
4k views

How does blender calculate poseBone.matrix?

How does blender calculate a poseBone.matrix through the hierarchy chain? A bone's final matrix is a transformation matrix which defines the bone in armature-space in the current pose (M1). I want to ...
János Turánszki's user avatar
12 votes
1 answer
6k views

How to rig a cartoon-style hose limb? (cartoon arm)

I was wondering if anyone knows how to set up a hose-like, cartoon-type limb like in this picture? My current setup for my model's limbs uses Inverse Kinematics and actually works quite well for the ...
Hungry Moogle's user avatar
11 votes
4 answers
5k views

How to rig a shirt with buttons so that the buttons follow the mesh of the shirt

I didn't address this in a while because I was busy with something else, but now it has cycled back into my schedule. Right now I have a shirt modeled and bones set in place. It's already technically ...
Krillinslosingstreak's user avatar
11 votes
2 answers
59k views

How do you merge two bones into one?

I have a generated mesh and set of bones from a makehuman model but it created two bones in the shin. How do I merge the two selected bones into one bone but keep the skeleton intact, i.e. the knee ...
Chris Stone's user avatar
11 votes
2 answers
5k views

How do you export bones relative to parent?

I'm currently writing an exporter script. So far, I can export meshes just fine, but I've got some problems with exporting the armature. According to the python api, there are three different types ...
Exilyth's user avatar
  • 308
11 votes
3 answers
15k views

Get the location in world coordinates of a bone's head and tail while in pose mode

I have a bone and I need to get the location of its head and tail. I know that I can search for the corresponding edit_bone, but this list is only filled in edit mode. Is there a way to get both ...
Miguellissimo's user avatar
10 votes
2 answers
32k views

How can I reverse the direction of bones in my armature?

I spent a lot of time building up my armature for my dragon model and then, after I was all done and started to refine it, I realized that the bones from the pelvis out to the end of the tail were ...
Thom Blair III's user avatar
10 votes
2 answers
10k views

IK-rig doesn't bend when I add elbow-target/elbow-pole

I have an IK-rig set up for my arm. An upper arm bone, a lower arm bone and the arm-IK bone, like so(front-view): The IK-rig works until I add an elbow target/elbow pole. At this point, the arm stops ...
Humilton's user avatar
  • 2,127
10 votes
1 answer
1k views

Can armature/bones be edited without edit mode?

I was looking after some information about armature and bones, so I can continue my importer script. I found some nice info here; no BMesh, and simple enough for my needs as beginner, so just perfect. ...
Zéiksz's user avatar
  • 1,979
9 votes
1 answer
45k views

How to IK rig legs

I have a simple character. I would like rig the legs so that I can easily control them. How can I IK rig my characters leg? .blend file
Vader's user avatar
  • 14.8k
9 votes
1 answer
46k views

character made with multiple objects one armature or different armatures

This is a character that I made in Blender with multiple objects When I added an armature fist, and joined the object and test, it didn't work. Then I linked parent but that didn't work either. ...
Diegoalfonso112's user avatar
9 votes
1 answer
32k views

How to re-parent a bone?

I have rigged a gun, but the bones/armature is attached to the wrong bone. I need to move all the bones which are meant for the gun to a different bone. Images which explain the problem:
Knuckles209cp's user avatar
9 votes
1 answer
9k views

How to restrict vertex weights to no more than N number of Bones?

I have a program that can animated a mesh using OpenGL but problematically it can only work and not crash when each vertex weight is affected as per the title to a maximum of four bones. The tutorial ...
RaenirSalazar's user avatar
9 votes
1 answer
25k views

Bones not moving in pose mode?

When ever I try to move or rotate a bone in pose mode, nothing happens. The bone stays frozen, not moving to any axes, no matter what bone I chose.. I tried rigify ready to use mesh but had the same ...
quryo's user avatar
  • 93
9 votes
2 answers
19k views

Is there a shortcut to keyframe an entire skeleton?

I'm new to animation in blender and I'm trying to make some character animations for UE4. I was wondering if it were possible to keyframe every bone at once instead of having to hit 'I' over rotation ...
ColeM's user avatar
  • 91
9 votes
1 answer
5k views

Delete bones via script

I want to delete all bones in an armature which contain a specific word but I can't figure out how to. This is the script: ...
leaderlord's user avatar
9 votes
3 answers
11k views

How to batch rename bones and their corresponding vertex groups?

If we have modeled a character or device or something that has many identical moving parts (arms, tentacles, etc.), and rigged one instance of such a part, how do we get all of the bones with the same ...
Mentalist's user avatar
  • 19.3k
8 votes
4 answers
17k views

How to copy constraints from one bone to another?

I've created some shapekeys driven by the bone controllers for my character. Then I gave constraints to the bones on the left side. Now I want to copy and paste them to the right side. Two questions: ...
Paul Gonet's user avatar
  • 33.4k
8 votes
2 answers
2k views

Folding a cube (animation)

I'm trying to fold a cube with an animation. I've tried inverse kinetics with no luck. Here are some images that explain what I'm trying to do. I'm trying to make this so that when the upper bone is ...
Warianos's user avatar
  • 425
8 votes
1 answer
14k views

How can I position bones in a model easily and precisely?

I tried to position the hand bones of my rig / armature, but it was SO difficult to get all those little bones to align in 3D space accurately, even when I was using Quad View. After working on it for ...
Thom Blair III's user avatar
8 votes
1 answer
12k views

How to rotate a bone using python

I have a bone, which i need to rotate. It has to be done on a server all the time, which means, that it would be nice to avoid clicking on the bone. I understand that i need to use: ...
Artmole's user avatar
  • 691
8 votes
1 answer
2k views

How are the Bones assigned to the Vertex_Groups in the API?

I´m working on an export script for Blender and I´m currently stuck at exporting bone weights. Here is what i have so far(excuse me if my Python is not that clean, the syntax is pretty new to me): <...
Luis W's user avatar
  • 255
8 votes
1 answer
16k views

Can I mirror animations on bones?

I have a model of a dragon. It's mesh was made by mirroring and also was it's bones. I want to animate a wing, but want to make the other wing to animate equally, but mirrored. Is it possible? I'm new ...
Erik Scheffer's user avatar
7 votes
1 answer
600 views

Glue like effect

I've been playing recently with rigging and tried to recreate the effect of a glue or goo like material in blender with no much success (still new with it). To clarify, I've added a pair of bones so ...
Cyanide's user avatar
  • 73
7 votes
4 answers
1k views

IK refusing to follow target around Z axis

The IK have set up does not follow the target around the Z axis. I am using an Empty as the IK target. You can download the blend here. Each bone except the bottom one has the following IK ...
Jack Wilsdon's user avatar
7 votes
1 answer
873 views

How are bones & armatures connected to the rest of a model?

Let's say I'm really new to Blender, and have just barely figured out what keyframes are for. Explain a Blender skeleton to me like I'm five. Do I need to use it, and how exactly does it connect to ...
Vector Lightning's user avatar
7 votes
1 answer
3k views

Why do some bones in an animation lose their position when applying scale to their armature?

After starting with a stock armature with a run cycle I added a few of my own bones for various armor pieces on my model. As the stock model is too large for my game and the engine requires me to ...
James Westwood's user avatar
7 votes
3 answers
18k views

Reseting the bone roll value to 0

I have an armature and i have aligned some of the bones to specific axes and now these bones have a roll value different from zero. I know that is supposed to happen but is there a way to reset to ...
Nikos Makris's user avatar
7 votes
1 answer
13k views

Bones moving wrong part of mesh?

I have an armature set up, but the bones aren't moving the mesh properly The mesh and armature: The vertex group of the bone I am going to move: As you can see, the circled region doesn't belong to ...
user avatar
7 votes
2 answers
376 views

how to rig this object (function compass)?

I'm trying to make something like a compass which is used to draw functions on paper. but I'm stuck and I have no idea how to rig it. I want to make an animation to show how it works and I want to ...
Mohammad's user avatar
  • 163
7 votes
1 answer
3k views

How does 'local with parent' space work?

My question touches the mathematical side of Blender more than the modelling one. I am having a problem understanding how the 'local with parent' space in bone constraints works. I have looked ...
Marcin Roguski's user avatar
6 votes
7 answers
40k views

In Pose mode, my bones are stuck in rotate, and wont transform

When in pose mode, the bones on my model wont transform, they are stuck in rotate mode, though I can scale them. This problem now occurs whenever I try starting a new project. Some bones that I made ...
Joshua's user avatar
  • 61
6 votes
2 answers
17k views

How to get/select a bone by it's name in python?

I am having a master armature which has multiple bones. Now I want to apply rotation to a particular bone. Now, I can loop through all the bones in the armature and check for the bone with the ...
Varun kumar's user avatar
6 votes
2 answers
83k views

Model won't follow its armature in pose mode

I've set up a rig and built it around my model, and I've linked it to my model but when I rotate the bones in pose mode, the character doesn't move with them. My rig is the human meta rig that comes ...
Edward's user avatar
  • 71
6 votes
3 answers
615 views

How do I animate a shoelace that is being pulled out of a shoe?

I want to animate a tendon transfer surgery in blender. I want the tendon to follow the surface of the bone while it is pulled out at the incision area. It should look like a shoelace being pulled ...
Laura's user avatar
  • 61
6 votes
2 answers
11k views

Set active bone in pose mode from Python script

I'm trying to use the function bpy.ops.pose.constraint_add() on bones through a script, but stupid thing is that I can't find how to set the bones as active ones which is needed to call this function.
Branck's user avatar
  • 63
6 votes
2 answers
31k views

How do I copy bones from one armature to another?

I have 2 armatures. I want to copy one subset of bones from the first armature to the second -- in Edit Mode -- in order to have the same bones, same names, same transforms on the second armature. ...
VIBrunazo's user avatar
  • 332
6 votes
1 answer
10k views

Custom shape's bone

I'm doing a rig and I want to modify the shape of my bones: in particular the control bones of torso. Here a simplified situation: I want to change the shape of my octahedral bone in the circle ...
Fuboski's user avatar
  • 2,262

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