Scene_hierarchy

Maya2OSG conserves the full scene hierarchy of Maya DAG when exporting to OSG. Node names are also kept intact.

Maya transform nodes are converted to

osg::MatrixTransform

nodes. The rest of Maya groups are converted to

osg::Group

nodes.

In Maya, Emitters are a special kind of Transform nodes. They are exported as a regular osg::Transform with the emitter under it.

All features of Maya Transforms are correctly exported for static (not animated) Transforms.

This can be checked exporting the file

test_trans.ma

in the

tests

directory.

Animated Transforms

Animations connected to transform nodes (whether AnimCurves or MotionPaths) are exported to OSG AnimationPathCallbacks.

However, some features are not supported, because the class

osg::AnimationPathCallback

is based on

osg::AnimationPath::ControlPoint

objects that store only position, rotation and scale about the origin.

Maya Transforms will not be correctly exported if they apply a shear or move the scale or rotate pivot point.

To see an example, export the file

test_trans_anim.ma

in the

tests

directory and see the results (you can use the Preview buttons on the shelf).

This behaviour could be solved creating a more complex hierarchy to move the pivot point to the origin and then restoring it after rotating and scaling. Maybe this will be implemented in later versions of Maya2OSG.