COLLADA Public Forum

Importing problems with a specific collada file

Tue Jul 14, 2009 5:54 am

by DP007 (Posted Tue Jul 14, 2009 5:54 am)
Hi,

I tried to import the attached collada file into a 3d software like max and maya. In both cases it didn't import the file. Maybe someone here can look into the dae file and check it for errors.

Thanks in advance.

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Access Violation while trying to open a collada file

Tue Jul 14, 2009 5:34 am

by DP007 (Posted Tue Jul 14, 2009 5:34 am)
Hi,

I'm getting an access violation exception, when I call the DAE::open() function. If I run the domTest app, everything works fine. But if I try to compile my own VS9 project, I get an exception, when I open a dae file. Is it a file access problem or is it just a VS setup problem?

Thanks in advance.

Daniel

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collada and normal maps

Mon Jul 13, 2009 8:30 am

by giugio (Posted Mon Jul 13, 2009 8:30 am)
Hy.
I'm search for a tutorial on normal maps in 3ds 2008 or 2009.
Is possible also export to a collada file of the model the normal map simil to texture in the material section of the xml?
Thanks.

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collada and animations

Mon Jul 13, 2009 5:01 am

by giugio (Posted Mon Jul 13, 2009 5:01 am)
thanks.
But in the importer that parse the collada file ,how i know where an animation finish and when another animation start ?
Thanks.

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instance_node question

Fri Jul 10, 2009 7:22 pm

by aerojockey (Posted Fri Jul 10, 2009 7:22 pm)
I am curious why an instance_node element isn't allowed to appear directly insode a visual_scene element. I'd expect to be able to use an instance_node wherever a node is usable; this seems to be an unnecessary exception.

It appears the only way for a visual_scene to use nodes from a library that is to create a node specifically to nest them into. Which isn't that serious a limitation, but still.

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Max 2010 Physique Not Exported

Fri Jul 10, 2009 12:03 pm

by marcus (Posted Fri Jul 10, 2009 12:03 pm)
I found a link to the Autodesk FBX Support Page for you.

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Implementing Collada for Wikipedia

Fri Jul 10, 2009 5:10 am

by Duduman (Posted Fri Jul 10, 2009 5:10 am)
There has been an old feature request to allow Collada on Wikimedia Commons and Wikipedia. I was wondering if there was a way to do that. here is the bug report https://bugzilla.wikimedia.org/show_bug.cgi?id=1790 . Thank you.

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FCollada: Copy a part of file (some Geometry Entity)

Thu Jul 09, 2009 5:11 am

by luyen (Posted Thu Jul 09, 2009 5:11 am)
Hi all,

I'm trying to use FCollada to extract some Geometry Entity from a big collada file, but it was crash! Could you please take a look at my code:


	Code: cout << "Finding and saving meshs ... " << endl; FCollada::Initialize(); FCDocument* document = FCollada::NewTopDocument(); wstring fullpath = StringToWString(DAE_Filename); FCollada::LoadDocumentFromFile(document, fullpath.c_str()); // find a specific mesh, then save it string save_id = "Box01-mesh"; FCDocument* save_document = FCollada::NewTopDocument(); FCDGeometry* third = document->GetGeometryLibrary()->FindDaeId(save_id.c_str()); save_document->GetGeometryLibrary()->AddEntity(third); save_id = "c:\\geoid1039.dea"; fullpath = StringToWString(save_id); if (!FCollada::SaveDocument(save_document, fullpath.c_str())) cout << " fail to save " << save_id << endl; SAFE_DELETE(document); SAFE_DELETE(save_document); FCollada::Release();

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Skinning a Skeleton: Deriving JMi of Skinning Equation

Wed Jul 08, 2009 8:50 pm

by sickness18 (Posted Wed Jul 08, 2009 8:50 pm)
the following is snippets of code from the DAE (it is actually a finger):

<node id="node-Bone01" name="Bone01" sid="joint0" type="JOINT">
<translate>5.89163 -79.8736 -3.48687e-006</translate>
<rotate>-0.258444 0.683084 -0.683084 -208.981</rotate>
<scale>-1 -1 -1</scale>
<node id="node-Bone02" name="Bone02" sid="joint1" type="JOINT">
<translate>23.7247 6.86565e-007 7.62939e-006</translate>
<rotate>0.0163536 0.998265 -0.0565595 -33.6487</rotate>
<node id="node-Bone03" name="Bone03" sid="joint2" type="JOINT">
<matrix>0.99652 -0.07105 0.0436054 53.9616 0.04415 0.00611277 -0.999006 -4.76837e-007 0.0707129 0.997454 0.00922835 7.62939e-006 0 0 0 1</matrix>
<node id="node-Bone04" name="Bone04" sid="joint3" type="JOINT">
<matrix>0.993619 -0.00243863 0.112762 36.7931 0.112774 0.00598921 -0.993602 0 0.00174767 0.999979 0.006226 -7.62939e-006 0 0 0 1</matrix>
<node id="node-Bone05" name="Bone05" sid="joint4" type="JOINT">
<matrix>0.99796 -0.0221926 0.0598742 18.3381 0.059888 -4.02778e-005 -0.998205 0 0.0221551 0.999754 0.00128886 7.62939e-006 0 0 0 1</matrix>
<node id="node-Bone06" name="Bone06" sid="joint5" type="JOINT">
<matrix>0.999569 -0.0293479 1.49012e-008 19.4873 0 0 -1 -9.53674e-007 0.029348 0.999569 -3.72529e-009 7.62939e-006 0 0 0 1</matrix>
</node>
</node>
</node>
</node>
</node>
</node>

May I know how do i derive the JMi of "Joint 5"?
- So I will just use the translate,rotate and scale info and create a 4x4 matrix?
- How come the first 3 numbers in the <rotate> tag is not 0 or 1 but rather strings of dec numbers?
- Then how do I handle the <matrix> tag?

Actually i am quite lost in skinning a skeleton, is there a tutorial somewhere with step by step guide? Or anything that can point me in the right direction?

[I am actually trying to recreate a 3D Model (created and rigged in 3D Studio Max) in OpenGL so that i can control it with input from a VR glove]

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Collada Models in Google Earth

Tue Jul 07, 2009 5:09 pm

by arwise (Posted Tue Jul 07, 2009 5:09 pm)
I'm pretty hopeless when it comes to coding in Collada. I've tried using the coherency test, and at times, it would just return no results. I have no idea how to use it. Is there any documentation (besides the read me) out there that could help?

I also have a problem with coding: I'm bad at it. Just to say...i'm outright lost when it comes to interacting with XML. Can someone find/recommend a crash course? As any one can read from before, I don't exactly have the best understanding of my models, and the errors they carry. I thank everyone for the help and suggestions they've given thus far...but i'm hoping for maybe an explanation for a programming idiot.

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collada file with shader support please

Tue Jul 07, 2009 2:00 pm

by remi (Posted Tue Jul 07, 2009 2:00 pm)
you can generate those files with fxcomposer (free download from nvidia)

you can find examples in the modelbank (see link on collada.org) for example this bump map using glsl shaders:
https://collada.org/owl/browse.php?parent=81

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Generate COLLADA from base dataset

Tue Jul 07, 2009 1:23 pm

by dlundin (Posted Tue Jul 07, 2009 1:23 pm)
Hello,

I'm new to COLLADA and apologies if this question is obvious ...

Given a set of data - say aircraft tracks - what is the best way to transform it into COLLADA so it can be consumed? I'm considering using an ESB to do the transform (since it is already in the infrastructure) and either XSLT or XQuery.\

The idea is that data is coming in non-stop, the ESB sees updates and automagically transforms into COLLADA so it can be visualized in real-time.

Has anyone done something similar to this before?

Thanks
Doug

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src/dae/daeURI.cpp:16:21: pcrecpp.h: No such file or dir

Fri Jul 03, 2009 5:50 am

by theophilus (Posted Fri Jul 03, 2009 5:50 am)
Another update. I compiled and installer bullet-2.74 and updated rt/make/rt.mk and viewer/make/viewer.mk to use this bullet library. However, this resulted in compile error because of API changes in the bullet library.

From rt/external-libs/bullet/lib/linux/VERSION I found out that collada-dom 2.2 uses bullet-2.51. Luckily, I found the depricated source here: http://www.continuousphysics.com/ftp/pu ... t-2.51.tgz

With the bullet-2.51 library installed and the necessary changes to rt/make/rt.mk and viewer/make/viewer.mk files made, I was finally able to compile all projects in collada-dom-2.2 on CentOS 4.x, x86_64.... puh!!:)

May I suggest that you consider using CMake or autoconf make systems in future releases. That would be great!!

Best regards,
John

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Basic Animation in Collada

Fri Jul 03, 2009 4:59 am

by coders_gaint (Posted Fri Jul 03, 2009 4:59 am)
Thanks for your quick response

Oh! thats great.Really your post is helpful for all.

Thanks a lot,

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collada like documentation for extras xsd

Thu Jul 02, 2009 6:09 am

by newbie (Posted Thu Jul 02, 2009 6:09 am)
Hi,

We have produced a set of schemas for our own extras, and it would be nice if our documentation for these had the same layout as the collada specification (I mean the PDF).
Do you know if there is an xsd documentation generation tool which can do that ?

Thanks

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Random fragged exportation

Wed Jul 01, 2009 12:23 pm

by Hans (Posted Wed Jul 01, 2009 12:23 pm)
I used the latest version of Collada Nextgen (beta) with Maya 2009.

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Articulated System Sample

Wed Jul 01, 2009 3:03 am

by Gustavo Puche (Posted Wed Jul 01, 2009 3:03 am)


	slips wrote: Hi Gustavo, I have attached the enhanced simple.dae example with an articulated system. If you have any questions feel free to ask! Regards Steffen

A lot of thank Steffen for your sample...

Regards,

Gustavo

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From Collada to openGL ES texture coordinates

Wed Jul 01, 2009 12:37 am

by tyua (Posted Wed Jul 01, 2009 12:37 am)
you have 3 tables to deliver to opengl es when you want to draw an object :
- vertex coordinate table, with glVertexPointer
- texture coordinate table, with glTexCoordPointer
- vertex ID table, with glDrawElements

you may also have the normals table to provide but thats optional for some basic example

i was initialy rebuilding the texture coordinate table by getting each texture coordinate ID in <p> (dont forget the offset to get the right ID) and then rebuilding a table by retrieving the corresponding texture coordinate in the <float_array> node relative to texture coordinates, but i wasnt doing the same for vertices coordinates, i was using straight the <float_array> node relative to vertices coordinates and i was also retrieving from the <p> table only the vertex ID in a new table.

since we provide with glDrawElements a single table ID, the texture coordinates table and the vertices coordinates tables were not sorted the same way, and my texture was badly applied. so finaly i rebuild the vertices coordinates table the same way than the texture coordinates table. and the table i provide to glDrawElements is a new one, very simply created with each element having the same value than its rank in the table, basicaly the list is now :
vertexIDTab[0]=0;
vertexIDTab[1]=1;
...
vertexIDTab[n]=N;

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Collada - Sketchup - Support - Thread

Tue Jun 30, 2009 11:22 am

by marcus (Posted Tue Jun 30, 2009 11:22 am)
Hi Simon,

It's not clear to me that this is problem involving COLLADA yet. I.e. you haven't shown any issues with .dae content specifically. Have you contacted Crytek about these issues?

Sang can you post a link to a Google Sketchup support forum or bug tracker for Simon?

Thanks.

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Textures in 1.5

Mon Jun 29, 2009 6:01 am

by christoph_nenning (Posted Mon Jun 29, 2009 6:01 am)
I have entered a bug in khronos bugzilla. It got ID 191.

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COLLADAMaya problem in Linux

Fri Jun 26, 2009 3:17 am

by marcus (Posted Fri Jun 26, 2009 3:17 am)
According to the ColladaMaya project's README.linux file:


	Quote: To build the plugin for Maya 8.0 or 8.5, the compiler needs to be gcc 4.0.2.

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RGB COLOR and TEXCOORD combination

Fri Jun 26, 2009 2:34 am

by marcus (Posted Fri Jun 26, 2009 2:34 am)
Try the viewers listed in the products directory. Follow the link in the sticky post in the contributions forum.

viewtopic.php?f=13&t=1296

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How Can i use Animation Data...

Tue Jun 23, 2009 9:57 am

by waZim (Posted Tue Jun 23, 2009 9:57 am)
Thanks a bunch both of your replies,

I was doing the same before but there was another problem with the animation data which was creating the collapsed skeleton after i apply it.

and the problem is with Collada Max Exporter. when you export with baked matrices... it does not export the homogenous coordinates normalized.. instead they are all zeros.

and now i can see the skeleton animating.

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Articulated System implementa

Tue Jun 23, 2009 8:49 am

by slips (Posted Tue Jun 23, 2009 8:49 am)
Hi Gustavo,

I have attached an example of a robot. It enhances the kinematics model with kinematics information (e.g. activity of the joints or the indices of joints). If you have any questions feel free to ask.

Regards

Steffen

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Many submeshes result in skewed UV

Tue Jun 23, 2009 3:32 am

by marcus (Posted Tue Jun 23, 2009 3:32 am)


	Code: <triangles material="mtl" count="81"> <input source="#elemental_blue_mesh-vertices" set="2" semantic="VERTEX" offset="0"/> <input source="#elemental_blue_mesh-uv-map-1" set="2" semantic="TEXCOORD" offset="0"/>

I had a quick look too and notice that you are using the same index (offset=0) values to stream both your vertex and texture coordinates. Is your data really organized that way?

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daeTArray programming tip

Tue Jun 23, 2009 3:16 am

by marcus (Posted Tue Jun 23, 2009 3:16 am)
Caching array pointers isn't going to be sufficient to let you read values from a <source> if that's what you're trying to do. The <source> element can contain (0 or 1 of) many types of arrays and an <accessor> that describes the output data stream.

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Can't load dae models.

Fri Jun 19, 2009 11:08 am

by remi (Posted Fri Jun 19, 2009 11:08 am)
Looks like you have a space in the file name (between 12 and 34?)
Not sure what the syntax shold be, but space characters surely need to be escaped?

Argilliath wrote:

Hi Marcus:

Thanks for the reply, i tested with the name you suggested, and it gave me the same error:


	Quote: Error: Failed to open file:/e:/Proyectos/collada-dom/dom/projects/vc8-1.4/test12 34.dae in daeLIBXMLPlugin::readFromFile Error: Failed to load file:/e:/Proyectos/collada-dom/dom/projects/vc8-1.4/test12 34.dae

So, does that confirms is a filesystem issue?

Thank you for your help.

Argilliath.

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Biodroid looking for Programmers for COLLADA AI project

Fri Jun 19, 2009 10:31 am

by waZim (Posted Fri Jun 19, 2009 10:31 am)
hi Bruno,

I am interrested..

Wasim

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transform and bones

Fri Jun 19, 2009 8:26 am

by waZim (Posted Fri Jun 19, 2009 8:26 am)


	marcus wrote: All of the transforms. The animation channel replaces values that it targets.

What does that exactly means ???

Would the Local Matrix for a joint become that Matrix which you get from the Channel's targeted Values?

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import vertex info

Fri Jun 19, 2009 7:37 am

by waZim (Posted Fri Jun 19, 2009 7:37 am)
Its easy to do it in DOM.

but DOM has problems.. i imported one collada file "astroboy_walk.dae" which is created in Maya, to 3D studio Max and i exported it again... and then DOM was unable to read the Texture coordinates.. since MAX Texture Coordinates are in (S,T,P) DOM can't recognize that.

and it seems like now it even crashes ..

i tried to use DOM for exporting data from it. but it seems a waste of time. so i ultimately wrote my own exporter... go for it.. its worth it..

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