11. The only standard across engineering workshop drawings is in the creation of orthographic projections and cross section views. 12. The simplest projection, the orthographic projection , simply involves removing the z component from transformed 3d vertices. 13. Like the stereographic projection and gnomonic projection, orthographic projection is a distorted, particularly near the edges. 14. There are many possible orthographic projections that can show the cross-polytopes as 2-dimensional graphs. 15. The tetrahedron-first orthographic projection of the tetrahedral prism into 3D space has a tetrahedral projection envelope. 16. Coxeter's famous book on polytopes ( Coxeter, 1948 ) has some examples of such orthographic projections . 17. Common names for orthographic projections include plane, cross-section, bird's-eye, and elevation. 18. Telecentric lenses, on the other hand, provide an orthographic projection , providing the same magnification at all distances. 19. The Klein model is an orthographic projection to the hemisphere model while the Poincar?disk model is a stereographic projection. 20. The triangular-prism-first orthographic projection of the octahedral prism into 3D space has a hexagonal prismic envelope.
