Standard Origins and Orientations

3DEM Image Conventions

Icosahedral, Dodecahedral Symmetry


Standard orientation:  Twofold axes on x,y,z axes.  With the positive z-axis pointing at the viewer, the front-most 5-fold vertices are in yz plane, and the front-most 3-fold axes are in the xz plane.

Standard origin:  intersection of symmetry axis



 Standard  Orientation (standard display orientation) Standard Orientation (arbitrary display orientation)
Icosahedron An icosahedron showing standard orientation and standard display orientation
 An icosahedron showing standard orientation, arbitrary display orientation
Dodecahedron A dodecahedron showing standard orientation and standard display orientation A dodecahedron showing standard orientation, arbitrary display orientation



Back to standard origins/orientations table
  11 Feb 2006