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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.

34
votes
2answers
17k 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 ...
12
votes
1answer
9k 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?
7
votes
1answer
27k 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
5
votes
1answer
21k 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. ...
16
votes
4answers
53k 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?
17
votes
2answers
11k 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 ...
7
votes
1answer
434 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 ...
5
votes
1answer
258 views

Armature/Bone Heat Failed

I have a model which have meshes that are not aligned at x axis. When I try to use automatic weight for connecting bones to meshes, I get "Bone heat weighting: failed to find solution for one or more ...
9
votes
3answers
2k 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, ...
3
votes
2answers
2k views

How can I access bone's 'animation_data.action'?

This is the script I've got. It just basically offsets every selected objects animation for the other one as shown in this Tutorial ...
7
votes
2answers
12k 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 ...
8
votes
1answer
12k 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 ...
6
votes
1answer
6k 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 ...
13
votes
1answer
3k 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 ...
5
votes
2answers
39k 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 ...
2
votes
1answer
908 views

Two armature, two rest pose, fixing animations

So I have one FBX that have it's own armature and one object. Let's call it T pose. I have second FBX that contains one armature with let's say walk animation. I am trying to assign walk animation to ...
1
vote
1answer
2k views

Set the Rotation (in Quaternion WXZY) of a bone using API 2.49

I am using Blender 2.49b, and I have the following hand structure I would like to rotate the bones "Bone.001" to "Bone.025" using values (Quaternion WXYZ) given as input from text files. Although I ...
1
vote
2answers
522 views

Robot arm move a box

I'm doing a simple robot arm that turns the arms around and do different movements. But I can't figure out how I should do if the robot should pick up something like a small box? Should the box be ...
1
vote
1answer
169 views

How to animate a metal backbone?

Hello i've made a cyborg (a human body with metallic parts) and i have alot of difficulties with the rigging (the metallic parts deforms when i dont want them to) and especially the backbone! there ...
0
votes
2answers
327 views

blender finger mesh doesnt follow bone

I'm having this problem this is my first time rigging a bone into a mesh. My problem would be that the "left mid finger" whenever I rotate the bone the mesh doesn't quite follow. Any help would be ...
14
votes
2answers
1k 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 ...
4
votes
3answers
24k views

How to connect a mesh vertex groups with an armature bones

I have this mesh and armature found in this blend file. What I want to do is to connect the bones with the created vertex groups. And I don't want to use automatic weighting option as this will create ...
2
votes
1answer
506 views

Copy Rotation Bone Constraint not Smooth

I am struggling to get the CopyRotation bone constraint to work as I expect. Hoping someone can clear up where my confusion is. I have simplified my issue to this three bone setup: Bone C is the ...
8
votes
2answers
4k 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 ...
6
votes
1answer
7k views

Can't flip pose properly

I have a problem with flipping pose, I try to do the same thing as in this tutorial. On 3:25, he flips the pose by Ctrl+C, Ctrl+Shift+V. In my case, it only flips some rotations, but legs stay in the ...
5
votes
2answers
5k views

Separate/convert bones into their own armature

I have the following setup: Unfortunately this does not work in WorldViz. Instead I need every bone to have its own armature system. This results in an cascade of armature systems. But I would like ...
5
votes
1answer
5k 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: ...
2
votes
1answer
477 views

Parent object to bone latency (lag) issue

I'm using Pitchipoy meta rig and have come across instances where I need to parent an object or objects to a bone - I can't be the only one. Every time I do I get a latency issue where the child will ...
2
votes
1answer
2k views

Set bone constraints via python API

Is there any way to add bone constraint through python api? For example, I have two armatures: ...
2
votes
1answer
414 views

Get bones associated with specific action in python

Let's say I have a mesh with an armature and I've given it an animation action. I know I can get the action with bpy.data.actions and the bones with ...
9
votes
2answers
1k 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 ...
7
votes
1answer
6k 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 ...
3
votes
1answer
260 views

How can I move a PoseBone to a specific world space position?

I have written some code that calculates the world space coordinate I want to move the bone to but i am having trouble figuring out how to get that back into the bones coordinates. ...
2
votes
2answers
984 views

Set a bones matrix to a custom matrix

I have a script in which I compute a custom matrix for each bone of a skeleton. I know I have switch to edit mode but then I read that the property edit_bone.matrix ...
2
votes
2answers
4k views

Why do some bones in my armature disappear when I go into Edit mode?

I made a rig for a model of a dragon and for some reason, when I go into Edit Mode, some of the bones disappear: I don't know if this is relevant or not, but I created the rig using the standard ...
2
votes
1answer
406 views

Can't get armature to move mesh!

I am trying to get an armature to move one limb on a deer I have made. Here is my design process! I made the body and limbs as separate meshes. I wasn't sure how to create limbs out of the body of ...
1
vote
1answer
3k views

IK + Pole Target {Rig} is =//= Twisting my Characters Mesh

When i apply this rig i have here to my test model. With automatic weights. It totally twists my model. Any clue whats causing this? I tried to mess with the poles rotation. And i tried to apply ...
1
vote
1answer
12k views

How do you make clothes move along with model

how do you make clothes move along with your model? Do you rig the model first and then parent it to the body of the character then click cloth simulation? I am a little bit confused with the process. ...
0
votes
0answers
41 views

Weight painting moves the mesh

I am fairly new to blender. Please, if you know the answer just post it down here, and get it over with. Whenever I weight paint the model I have it moves the painted area to some weird origin ...
0
votes
1answer
223 views

weird bone axis/rotation problems (from blender to UE4)

i'm quite new, to unreal engine en blender. (installed both 1,5 month ago) and i start working on my first game/interactive experience. and i have run in a lot of problems sinds ;p (of course ;)) but ...
0
votes
2answers
342 views

How to join or articulate a group of bones?

I am rigging with bones and parenting with empty groups but when I want to join more that two bones as one unique articulation or when I move then in pose mode each vertices goes apart. This is the ...
6
votes
1answer
2k views

How do I animate a character with dangling chain

I have a fully rigged character and I would like to attach some loose parts to it, including a chain. How do I set this up, so the chain would freely 'dangle' from the character, following forces like ...
5
votes
6answers
2k views

Rigging a Pac-Man-like character

I have created a character that is basically a big moving eye with a tail. I am having problems wrapping my head around how to assign bones and weight it appropriately. Here's a picture: I have been ...
5
votes
2answers
2k views

Using spline-IK for bones but keeping control over individual bones

My goal is to rig the Ears of my quadruped character, which has huge and soft ears (rabbit-like). I've set up a Spline-IK constraint for the ear's bones chain, and added soft body physics to the ...
4
votes
1answer
4k 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 ...
2
votes
1answer
2k views

Blender Python - exporting bone matrices for animation relative to parent

I am making a homegrown 3d engine for my projects. So far, I am able to export: mesh materials Node hierarchy Each node in my engine has it own mesh(optional), material(optional) and a PARENT-...
10
votes
4answers
6k 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'...
6
votes
2answers
12k 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 ...
5
votes
2answers
2k views

How can a bone's tail be changed by a script?

I want to calculate a rotation matrix from two vectors, in order to check the steps are correct I have setup 3 armatures. A reference bone (arm_org), One that is directly rotated by applying a ...
3
votes
1answer
2k views

Weight painting deforms an object

When I weight paint my object deforms.How to fix that?