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Some of Blender's "Texture face" options can be used for exporting grouping nodes. Meshes with this option activated, become children of a grouping node, as outlined below.
Don't forget to copy the texture face options to any face of a mesh using "Copy DrawMode" button.
You can export a billboard node by turning on the "Halo" or "Billboard" buttons on the "Texture face" panel while in "UV/Face Select" mode. "Halo" will export as a screen aligned billboard and "Billboard" will export as a billboard rotating around the Y Axis (Blender's Z axis).
Collision detection between the user and scene geometry is on by default in VRML/X3D, but this can be deactivated for some objects in a scene. The option can be exported by turning off "Collision" on the "Texture face" panel .
Creating Billboards, Halos (screen aligned Billboard ) and Collisions
The BS Exporter for Blender allows you to create the full range of BS Contact's grouping nodes for culling, drawing and optimization. Here is an example for creating a "DrawGroup":
When adding your own text, there is no syntax checking on export, so you must write valid VRML or X3D syntax.
The transformations of "Empty" objects will not exported so, if necessary, move, scale and/or rotate the children instead.
Creating a custom BS Contact DrawGroup node
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