Beer glass scene creation
This course contains a little bit of everything with modeling, UVing, texturing and dynamics in Maya, as well as compositing multilayered EXR's in Photoshop.
# 1 24-06-2003 , 07:52 PM
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Location: Graz / Austria
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matrix concatenation for binding geometry to a skeleton

Actually i try to load in a .ma file in c++ using directX9 to render it. It is a skinned mesh. I never worked with maya since i am a programmer trying to code skinning... I choosed the .ma files cause theyre easy to understand...
So i did load in all informations i think i need ( the mesh, joint and skincluster nodes... )
I filled my vertex structure with the weigths and indices to the joints..
The problem now i have is how to concatenate the different matrices and/or informations ( at first to render the mesh in the bind pose ).

In the joint node there is a translation (.t), a joint orient (.jo) and a bind pose (.bps) matrix derived.
In the skinCluster node a bindPreMatrix (.pm) and a geomMatrix (.gm)

Can anyone give me a hint / a formular on how maya works with these matrices / information ?

Thanx Den
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# 2 24-06-2003 , 10:37 PM
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Um, why you try useing the actualy program, imstead of doing it all in C++. I dont like C++ any ways, im a Java man myself... hehe


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# 3 25-06-2003 , 11:34 AM
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easy to understand....

First i tried to load in the directx ".x" format.... but, ok, it sounds strange, but the ".ma" format is easier to understand...

Actually, it seems like it runs... i just multiplied the bindPose Matrix with the bindPreMatrix... user added image

# 4 03-07-2003 , 02:06 PM
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Join Date: Jan 2003
Location: Denmark
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Hi Den,

sounds interesting... will try to dig for some info... user added image

regards

Strarup


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Alex V. U. Strarup

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# 5 03-07-2003 , 03:10 PM
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strarup

Thanx... ! Would help me a lot... its easy to render the mesh in the bindpose but actually i couldnt find out a way to animate it...
i read in the correct rotation angles for the joints and a "dagPose" node but i dont know how to compute the right matrices....user added image

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