IR: 3D-World Postulates

This is a working paper which will probably be rewritten several times in the next months
AUTHOR: Gerd Döben-Henisch
COLLABORATOTS: Leo Pos, Thore Swindall
FIRST DATE: Febr 19, 1995
DATE of LAST CHANGE: May-31, 1996


Limiting the scope of Natural Sciences
If we want to construct a concret world within KIP II we have generally to ask the natural sciences, what they have as requests to describe a newtonian world of bodies consisting of specific matters. If we would do this in the right way we would clearly get a description much too complex for most of the tasks the virtual world in KIP II has to satisfy.

Thus in KIP II we will take the general framework of classical mechanics as our primary reference system, but according to the limited scope of most experiments we will simplify the demands regarding technical details as far as possible.



Postulates for a first World in KIP II
  1. We presuppose a 3 dimensional euclidean geometry as a right-hand cartesian coordinate system.

  2. A time is available as a constant periodic process.

  3. Three types of objects will be considered: solid objects, fluids, and gases.
  4. Objects are assumed to be BREPS of a fixed size and a fixed center-point.

  5. Every object is correlated with the following additional informations:

    • 3-dimensional shape and surface information (-> View)
    • Elasticity and kind of material (-> Taste)
    • Kind of surface (-> Touch)
    • Loss of gases (-> Smell)
    • Temperature (-> Touch, sense of heat)
    • Conditioned noises (-> Hear)
    • Weight

  6. Some objects can represent bodies of animals or agents. Bodies can move by themselves.

  7. We assume only movements with a constant direction and a constant velocity. In case of collisions we assume that the forces are always directed to the center-point of the objects.

  8. Objects can be placed on top of other objects

  9. All objects can be hit by movements, they can be moved out of their old position, and they can `fall down'.

  10. Bodies can turn left or right.

  11. Bodies can move forward with different velocities, but not during the same movement.

  12. Bodies can climb up in the forward direction and they can climb down.

  13. The terrain is a plane with elevation points and informations related to the type of surface (sand, gras, water, rocks, ...).



Comments are welcome to doeb@inm.de
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