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Collada: Sailing the Gulf of 3d Digital Content Creation

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In 1963, Ivan Sutherland wrote Sketchpad [57], the world’s fi rst real-time computer graphics application. In that breakthrough effort, he defi ned the basic techniques for structuring scene data that are still present in today’s 3D applications.

In one way, though, Sutherland had it easy. He didn’t have to grapple with the problem that has frustrated every subsequent developer: interchange, the process of transporting 3D data between applications.

For more than 40 years, developers have implemented interchange using ad-hoc data formats and proprietary interchange techniques. Every new 3D modeling program defi nes its own proprietary scene data format and also implements partial support for importing data from other proprietary formats.

For example, in developing the Unreal Engine, my company has written importers for fi ve scene fi le formats, and export plug-ins for the three major 3D applications. Each required signifi cant development and testing effort. What’s worse, every time we wanted to add a new feature, we had to update fi ve import modules and three export plug-ins.

This is one of those classic software problems that makes a developer scream: “There must be a better way!”

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