Forum: Vue


Subject: The mystery is solved!

smallspace opened this issue on Feb 21, 2011 ยท 10 posts


alexcoppo posted Mon, 21 February 2011 at 3:49 AM

V4 is an OBJ mesh, nothing more, nothing less.

OBJ files vertex positions have NO, repeat NO, real world definition. They are just number in 3D space. OBJ files definition contains NO reference to anything real world related as it is a 3D file format, not some CAD/CAM format.

What programs like Poser or Vue tell you about real world dimensions is nothing more than scaling, by some taken-out-of-the-hat factor, of OBJ values.

The ONLY reference I have ever found to something which look like a standard is a one-line quote in Poser 4 manual which says the P4 male is about 6 feet tall; the corresponding mesh extends for .751 OBJ units in the vertical axis so, for simplicity sake, we can say that 1 OBJ unit is 8 feet.

We are not talking of something like the speed of light, we are just using some conventions to wrap OBJ units (which are what we really need to coordinate) with something nearer to our everyday perception.

The real test is:

  1. create in a 3D app a unit sized cube and see how big it is when imported into Vue;
  2. import the same cube into Poser and see how big Poser thinks it is;
  3. do some kindergarten math to determine conversion factors.

Sorry about being a unit nazi, but a M. Sc. in Physics taught me something about topics like units of measures, significant digits (and the way to report them) and other stuff, like conservation of momentum (no reactionless space drives in real world...).

Bye...

GIMP 2.7.4, Inkscape 0.48, Genetica 3.6 Basic, FilterForge 3 Professional, Blender 2.61, SketchUp 8, PoserPro 2012, Vue 10 Infinite, World Machine 2.3, GeoControl 2