Dead Reckoning in a Non-Orientable 3D Space
dead reckoning, is when you drive about without a map.
Or for example, in a first-person shooter game. By memory of past navigation decisions and memory of scenery and sense of direction and traveled distances, you can sort of reconstruct the area's map.
![js canvas raycaster dead reckoning](../js/js_canvas_raycaster_dead_reckoning.png)
now imagine, dead reckoning in a non-orientable 3D space. This is when, the math wonders of nature sends a chill down your spine.
![karcher je st](../surface/karcher_je_st/karcher_je_st.png)
and that's possible when, math comes into a 3D game setting such as Second Life
for detail, see: Requirements for a Visualization System
the image Karcher JE Saddle Tower isn't a non-orientable surface. What we need is a image for non-orientable 3D space. See: Orientability