Skeletal animation is a technique in which a character is represented in two parts: a surface representation used to draw the character (skin) and a hierarchical set of interconnected bones (skeleton) used to animate the mesh.
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Skeletal Animation in DirectX
A few weeks back I asked the following question: Are there alternatives to Vertex Tweening?
I was pointed towards Skeletal Animation, or more specifically: Hardware Skinning. While I found quite some ...
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2answers
899 views
XNA: Rotating Bones
XNA 4.0
I am trying to learn how to rotate bones on a very simple tank model I made in Cinema 4D.
It is rigged by 3 bones, Root -> Main -> Turret -> Barrel
I have binded all of the objects to the ...
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1answer
321 views
importing animations in Blender, weird rotations/locations
This is for the Blender 2.6 API.
There are two problems:
1. When I import a single animation frame from my animation file to Blender, all bones look fine.
But when I import multiple (all of the ...
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1answer
412 views
OpenGL GLSL skinning problem
This time I've decided to ask a question related to my skinning problem. Two earlier ones were not really related to my problem and I've deleted them.
Ok, first of all, I'm using OpenGL 3, 3ds max, ...
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1answer
55 views
Are there alternatives to Vertex Tweening?
Now that I'm getting into animating 3D entities in my game, I was wondering what the best approach for this would be. I did some research and came across something called "Vertex Tweening". However, ...
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1answer
279 views
apply non-hierarchial transforms to hierarchial skeleton?
I use Blender3D, but the answer might not API-exclusive.
I have some matrices I need to assign to PoseBones. The resulting pose looks fine when there is no bone hierarchy (parenting) and messed up ...
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1answer
93 views
XNA Skinned Model - Keyframe.Bone out of range exception
I'm getting an IndexOutOfRangeException on this line of AnimationPlayer.cs:
boneTransforms[keyframe.Bone] = keyframe.Transform;
I don't get what it's really referring to. The error happens when ...
4
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1answer
316 views
Real Time Motion Retargeting
Using Kinect I've extracted coordinates(x,y,z) of user, I'm in search of method which can help me out transferring motion of Skeleton to any 3D model(AVATAR) using OpenNI and OpenGL.
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Mixing kinematics and dynamics in ODE
I am trying to do some animations on characters with a variety of body plans. I am trying to make a system that uses IK for moving end effector positions (some of the time), and use the actual ...
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1answer
63 views
Animation from bones?
I have a model loaded into my XNA project, it has bones that were created in 3DS Max and I am wondering can I animate my model using code?
All I will be doing is basic movements such as an arm swing.
...
2
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1answer
65 views
Adjusting a skeleton to a Specific Stance
Imagine having a climbing wall and you take 4 adjacent handholds and footholds where together they create a stance. Is there any algorithm or technique with which it would give you a realistic human ...
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124 views
UDK: Animating characters with weapons
I imported a custom character and a pistol model to UDK and both work, but the pistol doesn't appear with the animation of the pistol when I shoot or reload... Also, the character doesn't change its ...
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0answers
44 views
Swap limbs of a skinned mesh
If I have a model, such as a robot, I am able to swap its limb meshes out and replace them with other robot limb meshes by merely removing the limb mesh from the skeleton and attaching the new one to ...
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0answers
215 views
XNA - How to move skinned model and merge animations
After you helped me to resolve my loadContent problem I've wrote some code and made 3D model with animation. Because XNA 4.0 doesn't support .fbx with multiple animations I've generated 3 models with ...
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2answers
262 views
What matrix operations do I perform to translate then rotate then translate then rotate?
In an android game I want to draw a running leg. To output the thigh I do something like:
// legCX,legCY is the location on screen about which the leg rotates.
Matrix m = new Matrix();
...
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1answer
102 views
Guidelines when rigging a character
Just wondering that how many IK (Inverse Kinematic) bones should you apply to a game character before it starts to go resource hog. Basically should you try to get rid of IK bones and just try to ...
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3answers
478 views
How to position a sprite in a 2D animation skeleton?
Given two joints that define a bone, I would like to know how to decide where, between those two joints, I should draw the sprite. This should be a fairly simple thing to solve, but there is one thing ...
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1answer
245 views
How to make model's arms + weapon follow cursor?
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Just like the title says. I currently have my controlling movement working just how I want it to. Now in order to proceed with shooting I first should focus on how the model should look like to ...
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1answer
141 views
Armature in Unity3d distorted
On the left is a base mesh with armature in Blender. I imported this model and armature into Unity3d.
The result is on the right. The arms are clearly distorted, and I can't seem to fix it by ...
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2answers
225 views
Rotating a 2D Skeleton
I am currently implementing a 2D skeleton system in C# with XNA, but got stuck in how I would rotate the bones around a skeleton's axis.
A basic algorithm that I have figured out already would ...
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1answer
147 views
What are file formats that store skeletal movements, and are there databases of them?
I have a set of 3d vectors representing the positions of a character's hand, foot, shoulders and so on. Is there any kind of easy to read file I can use to animate those with walking, standing, ...
4
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2answers
275 views
Matrix interpolation for animation blending
I use the XNA Animation Component library to perform blending between animations. It uses spherical linear interpolation between matrices.
In most cases this works without problems. However, I have ...
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1answer
93 views
How stoper one annimation model on XNA?
I do not understand how to pause an animation of XNA. I can "Start" the animation of my model but not stop it. I use SkinningSample_4_0 sample dll
Here is my code to use.
Here is my code to use.
...
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1answer
141 views
Applying prerecorded animations to models with the same skeleton
well my question sounds a bit like, how do I apply mo-cap animations to my model, but thats not really it I guess. Animations and model share the same skeleton, but the models vary in size and ...
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0answers
109 views
Maya Animated Character export for XNA 4.0 problem
To begin with, I'm trying to export an animated character in .fbx format from Maya 2013 to XNA 4.0
In Maya, The Model has a basic rig and the animations are in clips made in the Trax editor.
so the ...
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0answers
359 views
exporting bind and keyframe bone poses from blender to use in OpenGL
EDIT: I decided to reformulate the question in much simpler terms to see if someone can give me a hand with this.
Basically, I'm exporting meshes, skeletons and actions from blender into an engine ...
2
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2answers
282 views
Calculate an AABB for bone animated model
I have a model that has its initial bounding box calculated by finding the maximum and minimum on the x, y and z axes. Producing a correct result like so:
The vertices are then stored in a VBO and ...
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1answer
267 views
Blender to 3ds max to cal3d format
There are quite a few questions on cal3d but they are old and don't apply anymore.
In Blender(must be 2.49a for python script to work!!!):
I have a scene with 7 meshes, 1 armature, 10 bones. I tried ...
3
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1answer
376 views
Engine for 2D Top-Down Physics-Based Skeletal Animation
I just watched at the Sui Generis video, and was completely amazed. Specifically, the part where the big troll thing is beating up the player with his flail.
This got me really excited, and I would ...
6
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2answers
718 views
How do I apply skeletal animation from a .x (Direct X) file?
Using the .x format to export a model from Blender, I can load a mesh, armature and animation. I have no problems generating the mesh and viewing models in game. Additionally, I have animations and ...
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0answers
114 views
Updating physics for animated models
For a new game we have do set up a scene with a minimum of 30 bone animated models.(shooter)
The problem is that the update process for the animated models takes too long.
Thats what I do:
Each ...
13
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3answers
1k views
How to programatically retarget animations from one skeleton to another?
I'm trying to write code to transfer animations that were designed for one skeleton to look correct on another skeleton. The source animations consist only of rotations except for translations on the ...
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305 views
Calculating the correct roll from a bone transform matrix
Read this forum topic for more info: http://blenderartists.org/forum/showthread.php?260602-transform-matrix-to-bone-%28head-tail-roll%29-bug
I'm trying to get my Blender3d modeller importer to create ...
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2answers
829 views
How to port animation from one skeleton to another?
While I need to do this in a Blender3D modeler script, the math should be similar for other modelers or realtime engines.
Blender3D specific terminology:
Armature = skeleton
EditBone = rest pose bone ...
2
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2answers
418 views
Tips on combining the right Art Assets with a 2D Skeleton and making it flexible
I am on my first attempt to build a skeletal animation system for 2D side-scrollers, so I don't really have experience of what may appear in later stages. So i ask advice from anyone that been there ...
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1answer
130 views
Finding the endpoint of a named bone in Irrlicht
I'm making a tank game that will have multiple tanks. I want to be able to define the weapon placements using bones that I can add right inside the modelling program (Blender to be exact).
All tanks ...
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1answer
499 views
Bone creation in XNA Content Pipeline
I'm trying to manually create a ModelContent instance that includes custom Bone data in a custom ContentProcessor in the XNA Content Pipeline. I can't seem to create or assign manually created bone ...
4
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1answer
616 views
Skeletal Animation - Automatically apply skeleton to model
Looking at websites such as mixamo.com or some game's development systems such as the animation editor for Overgrowth (http://www.youtube.com/watch?v=-RpqbC5-Z0E), i see that the skeleton in these ...
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0answers
159 views
Bone pivot mirroring problem in 3dmax
Im make model with animation in 3dsmax and port it to XNA game. All works fine except one character hand. I suspect its all about pivot and kinematics. When I create hand bone from scratch the ...
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1answer
208 views
Primitive Animation
I am creating a minecraft-like clone and was wondering what is the best way to go about animating a model, for example implementing the following feature: when the player presses the arrow keys, move ...
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2answers
251 views
How to make leg bones children of torso bone in Blender?
I'm a complete Blender novice and I'm trying to create a humanoid skeleton. I'm having problems figuring out how to make my leg bones children of the torso bone. Here's how my skeleton looks like:
...
