利用者・トーク:Taniwha/FOR-and-parenting

Questions to Answer

Some of these we already know, others we need to figure out:

• What is an object's Origin?
• Exactly what is Parenting?
• Precisely what is a Frame of Reference?
• What are some examples of when this simplifies things?
• What is this "Inverse" deal?
• How is it useful?
• Do BGE physics take FOR into account for everything?
• What bpy properties can we observe?
• So what bpy calls calculate the true World coordinates?
• What about the BGE calls?

Fragments of Resources

• http://www.euclideanspace.com/physics/kinematics/fofr/index.htm
  • Physics-focused
  • Mentions Einsteinian relativity to point out Newtonian relativity
  • Shows some of the matrix math involved
• http://blenderartists.org/forum/archive/index.php/t-208399.html?s=8ba3a0cd7ee981273de1078cbee99db3
  • This thread shows how little real knowledge there is about it. Some people actually get some of it right... I haven't read the whole thing though.
• http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Coordinate_Spaces_in_Blender
  • Is linked to in the above thread.
  • I included it to show how bad the existing docs are.
  • They say the space is unique to the Scene -- so we'll have to continue testing for that, but basically the rest of the stuff they say is iffy so I'm not sure.