Hi all,
I'm try to understand the 3D-scenes and come across the attributes
dr3d:distance and dr3d:focal-length. They correspond directly to the
properties fields in the "3D Effects" dialog.
I find a lot of descriptions for 3D-graphics modelling using VRP, VPN,
VUP, "Projection Reference Point", "Direction of Projection" for
parallel, "Center of Projection" for perspective, "Center of Window",
and "Viewing Reference Coordinate System". But I cannot map these terms
to "distance" and "focal-length". Because there are no lens and there is
nothing like "out of focus" in the 3D-scenes, I do not realize how the
terms are defined.
Kind regards
Regina
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