Collada

The Collada specification documents, forums, wiki, model bank and more can be found at the Official Collada website.

Collada features

Collada features	Supported by OSG plugin
Geometry	Yes
VisualScene	Yes
Materials	Yes, profile_COMMON
Animations	No
PhysicsScene	No, OSG has no Physics support

How to build

The OSG Collada plugin depends on the Open Source Collada DOM library

Option strings for Collada writer

polygon	Use polygons instead of polylists for element
GoogleMode	Write files suitable for use by Google products. (Invert interpretation of A_ONE transparency as Google earth does)
NoExtras	Do not write any <extra> elements

TODO/Wishlist

• Solve differences in drawables, DAE reader should place multiple collation elements into multiple primitivesets in a single geometry where possible (only when same material)
• solve differences in matrices
• Multitexture support
• Skinned mesh and generic animations using osgAnimation
• Profile_GLSL based on AMD's Collada OpenGL Effects Viewer
• Handling more <extra> to more closely mimic the intended lighting
• Add proper <asset> info

Example Collada dae models

• Test Model Bank Collection of test models from the Collada project
• Google 3D warehouse Rename the kmz to zip and unzip to find the dae models.

Of course you may also Google for data, but be aware that there are also a lot of invalid Collada files available on the web.

Collada data may be tested for corruption at three levels:

1. Well-formedness; conform to the XML syntax rules. Most of the Collada XML data on the web will be well formed, because this is the easiest to catch by tools/parsers.
2. Validity; conform to the semantic rules specified in the Collada XML schema.
3. Coherency; all element referencing and validation not in the scope of an XML schema. Are all used materials/textures available? Do arrays contain correct data? etc.

To do this you can use the CoherencyTest command-line tool or Java based GUI-tool Collada Refinery