[x3d-public] Import/Export Example

[Alan Hudson <giles@yumetech.com>]

Xj3D has implemented the import/export capabilities of the X3D 
specification.  We've made a small set of simple examples to get the 
ball rolling on using these new features.

Import/Export allows you to expose fields from an Inline to its parent.  
Basically making an Inline have a small interface similar to a proto.  
It was felt that this interface would make content creation easier.  In 
your Inline you EXPORT the fields you want exposed.  In the parent scene 
you IMPORT those names and then you can ROUTE to them as desired. 

You can find the examples here:

http://www.xj3d.org/examples/

You will need the latest dev release version of Xj3D to run this.  Our 
dev releases now provide user installers, they are available here:

http://www.xj3d.org/snapshots.html

A simple example of the parent file would be:
#X3D V3.0 utf8

PROFILE Immersive

DEF TG Transform {
 rotation 0 1 0 0.78
 children [...]
}

DEF MVB_INLINE Inline {
 url "moving_box_export2.x3dv"
}

IMPORT MVB_INLINE.POSTION_INTERP AS PI

ROUTE PI.value_changed TO TG.set_translation

---
The inline would look like this:
#X3D V3.0 utf8

PROFILE Immersive

DEF TS TimeSensor {
 cycleInterval 10
 loop TRUE
}

DEF PI PositionInterpolator {
 key [ 0 0.25 0.5 0.75 1 ]
 keyValue [
    0 0 0
   -1 0 0
   -1 1 0
    0 1 0
    0 0 0
 ]
}

ROUTE TS.fraction_changed TO PI.set_fraction

EXPORT PI AS POSTION_INTERP

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