Validator - validateB3dm header

[lilleyse]

@JudyWeng

Write a lib file called validateB3dm that takes a Buffer containing the contents of a b3dm (like as returned by readTile) and checks that it is valid according the the b3dm spec. For now just check that:

magic is "b3dm"
version is 1
byteLength is equal to the Buffer's length
batchTableJSONByteLength - skip for now, will require more validation later
batchTableBinaryByteLength - skip for now, will require more validation later
batchLength - skip for now, this is dependent on the glTF within the b3dm

This issue will get more involved and will eventually extend to the other tile formats.

[JudyWeng]

I tried to push earlier and it says I do not have access to 3d-tiles-tools. Am I supposed to push elsewhere?

[lilleyse]

Did you receive any emails about being added to the organization?

[JudyWeng]

oh sorry, yeah, it went to my spam box for some reason. Thanks!

[lilleyse]

Fixed in #14

[lilleyse]

And #16