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Thread: Collada RT & Baked Matrices

  1. #1
    Junior Member
    Join Date
    Feb 2007

    Collada RT & Baked Matrices

    Hi, Will there be a version of the collada runtime that supports importing
    animated baked transforms for skinned models anytime soon?

    There seems to be a problem in the RT animation/display code in that I'm getting different results between a skinned anim shown in the Feeling Viewer and the same anim using Collada_RT (both not using baked transforms or any unknown animation targets).

    The anim I'm looking at just uses rotation around axes - but the axes that the points rotate around seem to be different from the ones in Maya and the Feeling Viewer visually.

    Has anyone else had this problem?


  2. #2
    Senior Member
    Join Date
    Aug 2005
    Can you explain a little more of what the difference is? Or is it possible to post the document you are having problems with or a similar document you create just to demonstrate the problem if the first is non distributable?

    If the rotations just seem a little backwards maybe it is a coordinate system thing. One (right handed or left I don't ever remember which does what) a positive rotation angle yeild a clockwise motion, the other a counter clockwise motion. Thats just a wild guess, don't put too much stock in it. If we can get a sample doc we can figure it out.


  3. #3
    Junior Member
    Join Date
    Feb 2007
    Thanks for the reply... I've found the problem now.

    It was an additional bind_shape_matrix in the DAE file which is ignored/unsupported by the collada_rt. Transforming all of my verts and normals through this once at load time fixed everything up nicely

    Thanks, Chris.

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