[X3D-Public] X3D Schema, DTD corrections: Pi/2 bounds were incorrect at 1.5708

[Don Brutzman]

X3D Schema, DTD update activity:

5 September 2011, brutzman
- changed Pi/2 limits from 1.5708 to 1.570796 for improved arithmetic correctness,
    must not exceed legal value or tools will throw errors for default values

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Also updated X3D Schema and DTD documentation.  Relevant links:

http://www.web3d.org/specifications/contents.html
http://www.web3d.org/specifications/X3dDoctypeDocumentation3.2.html
http://www.web3d.org/specifications/X3dSchemaDocumentation3.2/x3d-3.2.html
http://www.web3d.org/specifications/x3d-dtd-changelog.txt
http://www.web3d.org/specifications/x3d-schema-changelog.txt

These and related links are maintained on the X3D Resources page:
http://www.web3d.org/x3d/content/examples/X3dResources.html#AuthoringSupport
http://www.web3d.org/x3d/content/examples/X3dResources.html#Tooltips

X3D tooltips have also been updated.
http://www.web3d.org/x3d/content/examples/X3dResources.html#Tooltips

Review, comments, questions and improvements are welcome.

all the best, Don
-- 
Don Brutzman  Naval Postgraduate School, Code USW/Br      brutzman at nps.edu
Watkins 270   MOVES Institute, Monterey CA 93943-5000 USA  +1.831.656.2149
X3D, virtual worlds, underwater robots     http://faculty.nps.edu/brutzman