Model file type most suited for skeleton animations?

Graphics and GPU Programming Programming

Started by tapir March 31, 2011 07:31 PM

5 comments, last by RobTheBloke 13 years ago

100

Author

March 31, 2011 07:31 PM

I've heard that the obj. format is not good for making skeletal animations. Do you recommend using a another file type that already exist, or should I create my own file type that supports skeletal animations?

karwosts

841

March 31, 2011 08:51 PM

What choices do you have to select from? I assume you're restricted to whatever functioning exporters you have from some kind of modeling package?

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V-man

813

April 01, 2011 01:33 PM

.obj is for mesh data. Also it is old and shitty.

For skeletal, there is .x or milkshape
md5 but md5 belongs to id games.

Better yet, invent your own format.

Sig: http://glhlib.sourceforge.net
an open source GLU replacement library. Much more modern than GLU.
float matrix[16], inverse_matrix[16];
glhLoadIdentityf2(matrix);
glhTranslatef2(matrix, 0.0, 0.0, 5.0);
glhRotateAboutXf2(matrix, angleInRadians);
glhScalef2(matrix, 1.0, 1.0, -1.0);
glhQuickInvertMatrixf2(matrix, inverse_matrix);
glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);

RobTheBloke

2,553

April 01, 2011 03:17 PM

Better yet, invent your own format.

^^ that ^^

And write a small external tool to convert data from .x / .fbx / dot xsi / crosswalk / collada to your own format.

tapir

100

Author

April 06, 2011 04:03 PM

[quote name='V-man' timestamp='1301664796' post='4793042']
Better yet, invent your own format.

^^ that ^^

And write a small external tool to convert data from .x / .fbx / dot xsi / crosswalk / collada to your own format.
[/quote]

I was planning on making models in Maya and loading them into OpenGL. How do I create a 3D model format that supports skeletal animation and make and Maya exporter for the format? Are there any tutorials/books on that?

Bow_vernon

324

April 06, 2011 04:09 PM

Nope, but you can mimic the functionality of those formats. I learnt the ms3d spec, and created my own format that only stores relevant data.

RobTheBloke

2,553

April 08, 2011 04:47 PM

Are there any tutorials/books on that?

http://nccastaff.bournemouth.ac.uk/jmacey/RobTheBloke/www/research/index.htm

Model file type most suited for skeleton animations?

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