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could you tell me how to creat ?

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Difficult to answer because it depends on the animation, but basically what I do is:

- Create the model(s) using SketchUp.

- Export the different parts of the model/animation *separately* from SketchUp as KMZ files.

- Extract the Collada (dae) models from these KMZ files using ZIP software.

- Then write some KML to put everything together and do the animating. For this I just use a basic text editor (Wordpad or Notepad), or for more complicated animations like my Ferris wheel, a Spreadsheet too.


So, if you don't already, you'll need some knowledge of how KML works:
http://earth.google.com/kml/index.html

... Particularly Collada model referencing from KML:
http://earth.google.com/kml/kml_21tutorial.html#models

...and the TimeSpan tag:
http://earth.google.com/kml/kml_tags_21.html#timespan


IMO the best way to see how KML works is by downloading kmz files from the community, unzipping them and opening up the 'doc.kml' file in a text editor.

If you do that for the Airplane you'll see that the KML contains 35 placemarks, each with different <TimeSpan> <begin> dates and each linking to a separate Collada model 'brick'.


HTH

James

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www.barnabu.co.uk
List of my Google Earth models, animations etc.

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