I'm trying to import an 3D-Model which I have created with blender.
My goal is to resize the 3D Frame accordingly programmatically with the help of an armature.
I could achieve this within blender but unfortunately when importing the .dae file in Xcode it looks like one location modifier was not applied...
Underneath the described behavior:
BLENDER
XCODE
Does have anybody an answer to this problem?
Thank you in advance!!!
Modifiers and constraints use code within blender to perform their functionality. These don't export to other apps. You will need to either find a way to make it work without modifiers or make your xcode project move multiple bones at the same time.
The error you are getting is from having one chain of bones, the side bones are children of the bottom bones, so both of them move as you move their parents.
If you are exporting pre-set animations to use in your app, then you can export the animations with the modifier actions baked into the final animation. If you are dynamically moving the bones in your app, you will need to move multiple bones together.
You can have two chains of bones from the one root bone, like having a left and right arm of a character parented to the spine. In xcode you then need to move the lower side bone at the same time as the bottom bones as well as the left bottom bone to move sideways with the side bones.
Related
I have a GameObject in a Unity project for HoloLens with HoloToolKit, which I need to rotate. The object has a BoxCollider and HandDraggable script, and I'm also adding a TapToPlace component in runtime. The scripts that I've tried for rotation are TwoHandManipulatable and BoundingBoxRig, and they work to resize the object, but no matter what I do, the object does not rotate.
This is how I tried with BoundingBoxRig:
And this is how it looks with TwoHandManipulatable:
None of these works, only for resize. I would appreciate the help, thanks!
For me all I had to to to get it to work was to add the Transform of your arrow2 to the box of the Two Hand Manipulatable. Just click and hold on Transform and drag it into the box next to Host Transform. I added it to my project and it looks like this:
Also I don't think you need the Hand Draggable Script if you have the Two Hand Manipulatable because the last checkbox in the Two Hand Manupulatable enables movement with one hand if you want it.
Edit: I have an Animator on it but you don't need that. I have it because I made the model in Blender and it got added automatically.
I created an animation in Blender with armature rigging. When I test it in Blender by pressing Alt-A, it works perfectly fine. However, when I export it as a .glb using the KhronosGroup GLTF exporter, the resulting animation is distorted (e.g., limbs are disconnected and moving in a weird way).
Why is this happening (and how can I fix it)?
For the past two days, I have been trying solutions from similar questions (such as applying location/rotation/scale with Ctrl-A, or deleting the Armature modifier on the mesh) but none of them have worked for me.
Links:
Here is a link to a screen-recording of what the animation should look like (this is me playing it in Blender):
https://github.com/kylejlin/hosting-for-my-stackoverflow-questions/blob/master/correct-animation.mov
Here is a link to a screen-recording of what the animation actually looks like (this is me testing the exported .glb in the browser with Three.js):
https://github.com/kylejlin/hosting-for-my-stackoverflow-questions/blob/master/distorted-animation.mov
Here is the .blend file:
https://github.com/kylejlin/hosting-for-my-stackoverflow-questions/blob/master/soldier.blend
Here is the exported .glb file:
https://github.com/kylejlin/hosting-for-my-stackoverflow-questions/blob/master/soldier.glb
I looked at your setup a bit more.. I see you have a few IK bones that are partially driving the animation. Those won't translate correctly, and will have to have the IK baked into the animation. I also investigated the mirror modifier and realize the problem there.. to get the mirrored object to export, you have to click the "apply modifiers" checkbox, but that ALSO applies the Armature modifier, which distorts the mesh so you get the wrong mesh out. To fix that you have to apply the mirror modifier manually in blender, then export Without "apply modifiers" checked. Once you do that, and once you bake the IK into the animation, you might get it to work.
I've done the IK baking in the past but forget exactly how it works, but here's a starting point: https://blenderartists.org/t/bake-ik-to-fk/587226
fwiw Here is the .glb when I pre-applied the mirror modifier.. notice the arms animate correctly now, but the legs/feet are still screwy because of the IK. I didn't figure out how to bake that yet...
https://drive.google.com/open?id=1zeA-mMirOWYZHlzdURqNnykgh_g10kbr
Set Object's transformation values:0 before Rig.
I've an object in Blender. Because I want to do some UV-unwrapping using ThreeJS (see here) I determined that I need merge two of the sides to correctly unwrap.
So before exporting the .blend as a .obj object I selected the Tris to Quads face option to create a square face for the two sides as opposed to it being made up of two triangles. Here's what it looked like in Blender:
But when I import the .obj and .mtl file into ThreeJs I get this:
Is this a problem to do with me not updating the material being added to the new object?
The handles appearing white makes me think this is the case. If so how can I go about fixing it?
When I see something like this, the first thing I usually do is to set the material to side: THREE.DoubleSide. If that helps, the problem has to do with the normal-directions (so the face is actually there but isn't rendered because it is facing away from you).
To fix this, you should try the following:
In blender you can enable displaying of normal-directions in the right-hand menu (select "Face normals in section "Mesh Display").
You should now see if any of the normals are pointing inwards/in the wrong direction.
There is an automatic fix that works well for properly constructed meshes:
select object and switch into edit-mode (<Tab>)
select all vertices (shortcut <A>)
via menu "Mesh" > "Normals" > "Recalculate Outside" (shortcut <Ctrl>+<N>).
I'm currently trying to export an animated blender model to three.js using the exporter of three.js (github.com/mrdoob/three.js/tree/dev/utils/exporters/blender/2.66/scripts/addons).
I've created a model including bones and weights and a tiny animation.
The problem I have: The model gets broken. Somehow the bones don't rotate around their origin but around the origin of the root bone. Moving the bones manually does not make a difference.
I followed these tutorials:
devmatrix.wordpress.com/2013/02/27/creating-skeletal-animation-in-blender-and-exporting-it-to-three-js/
dev.mothteeth.com/2012/10/threejs-blender-exporting-skeletal-animations/
I have:
Deleted the Armature
Checked the Vertex Groups
Keyed all bones in the first and last frame.
I've been to pretty much every thread I could find on github and stack overflow. These seem to be the main issues for these errors. But I guess I still miss any point. :(
I have uploaded all files including the blender files and exported animation.
http://www.file-upload.net/download-8068001/forum-files.rar.html
Any suggestions?
Thanks a lot in advance.
The problem was that the location/rotation/scale were not reset before exporting the model.
Before You export Your model, select the mesh and press CTRL+A and select location. Repeat for rotation and scale, then select the armature and do the same. Now it works.
I've downloaded both the tutorial package and your code. The code aspect looks fine. So looking over the model I see that your vertex groups are not well defined. When I select the Left_collarbone bone, left_upperarm, left_lowerarm I seem to be getting vertices from parts of the torso, head, etc... in the mix. I suspect that what your seeing with your funky shoulder stretch animation is that the collarbone is part of some other groupings and when exported the "weights" of the mesh are confused causing the bone to pull badly on the mesh. Try cleaning up the vertex groups and see if that helps. #lukasz1985 has the right idea, nice one! +1
P.S. Thanks for the link to the cool animation tutorials for Three.js :)
I had an issue where calling THREE.GeometryUtils.center(geometryWithBones) on a the newly imported geometry would make all the skinning look very strange. Getting rid of that fixed things.
Also make absolutely sure, that the three.js blender exporter is not set to to align your model in any way. (I had it set to "center" and it took me 4 hours to figure out why my bones rotate around some spot that was NOT the spot they rotate around in blender.)
I've acquired a great quad model. I skinned and animated it to a rig build by a
Mel script. It works great as far as editing the animation using sliders and parameters
in Maya. When I export the file as an FBX file to Unity3D, it does not animate. Is something
being lost in the translation from Mel to the rig? Unity needs a boned rig, is this procedural rig not the equivalent of a rig built and animated with the skeleton tools in Maya? I've check that I have a 'Reference' folder, I've set keys, changed root name to "Hips".
Thanks for any insight on this question.
dDuane
If you are transferring the file with no errors and there is no animation then there are three issues to look at.
First, you may have accidentally not exported the keyframes. Make sure the box is checked to export animation on the FBX export UI.
Second, it's possible that the object that contains the actual keyframes is not being exported. When you animate using the MEL scripted GUI, find out where the actual keyframes are on the rig and make sure that object is exporting with the rest of the character.
Third, the object might be transferring fine but depending on the rig setup the connections/constraints/whatever might not be working or supported in Unity. You might consider baking the animation to the skeleton before transferring to the engine. To do this, select the skeleton, click [Edit -> Keys -> Bake Simulation].
I don't know what Maya you are using, but I've always used 2010. This is the workflow that we used for a small unity 3D game project:
Export all of the
animations in one scene as a .fbx. Be sure you just select the geometry (it
usually helps to have it all grouped, but if you can't for some reason that's
okay) and hit export selected.
These FBX export options should be checked:
Geometry:
Edge smoothing,
Tangents and Bi-normals
Animation:
Animation,
Bake Animations,
Bake Animations,
(range of animation),
step = 1
Deformed Models:
Deformed Models,
Skins,
Blend Shapes (if using these),
Curve Filters,
Resample as Euler Interpolation,
Input Connections,
Instances to Objects,
Referenced Containers Content (if using any references),
FBX File Format
Binary
FBX200900
When you bring this into Unity, set animation generation
to "store in root." If all of your
animation is in this one file (which it should be). The "split
animations" box should be checked and define the names and range of these in the
chart below. When you eventually create an animation blending script, drag
and drop it on the animation object within the player prefab, not the prefab
itself.