Horde3D

Next-Generation Graphics Engine
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PostPosted: 08.04.2011, 11:51 
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Joined: 08.04.2011, 11:38
Posts: 1
i am studing horde3D and Ogre.

In ogre, frame(animationtrack) record relative translate of a bone(joint)
first: reset bone to origin postion
then: blend and interpolate the frame
then: bone new Local postion = bone origin local postion * frame postion
then: compute bone world postion, soft or gpu skining

In Horde 3D,i see
first: bone new Local postion = frame postion
then: compute bone world postion, soft or gpu skining

See, both two method can drive skeleton move right. wo can get "horde frame postion = bone origin local postion * Ogre frame postion", as i found in "conventer project"

So why design this not that? for performance, or any other detail?

thank very much!


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PostPosted: 05.06.2011, 02:53 
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Joined: 15.02.2009, 02:13
Posts: 161
Location: Sydney Australia
Hi noetic, not too sure about that but I assume it is done like that to keep the horde scene graph very generic, so joints, lights, emitters, anything with a scene graph/node representation would be dealt with in the same manner, joints wouldn't be a special case here where you need to calculate the bind pose and then apply the delta and then the skinning on top, plus it would be cheaper CPU-side wouldn't it? I'm not familiar with Ogre so I can't comment on this further.

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