1. The nautical/aerospace/anatomical terminologies deal with the model-relative ordinals:

    and as such are the same as the man standing on the floor of the model and rotating with it; and they suffer from the same problem, namely: which end of the model is the bow/fore/face. If the model was a boat/plane/car/house/human, it would be (mostly) obvious, but for a chart?

    In addition, the anatomical terms have extra confusion that either the terms change, or their meanings change depending on whether you are dealing with an upright (human) or supine (dog/horse) vertebrate. And it starts getting really confusing when dealing with weirdos like flat fish.

    And finally, the terminologies are often verbose (Anteroposterior, rostrocaudal,craniocaudal, cephalocaudal), and mostly unfamiliar. I always have to look up port & starboard for instance

  2. Yaw, pitch & roll:

    Define axis of rotation rather than ordinals; and do so in a model-relative manner; and whilst pitch & roll are fairly intuitive; I always have to think hard about yaw. (Quick: which way are you turning if you are experiencing negative yaw? And does it change, and if so, how, if you're upside down or climbing vertically at the time?(Rhetorical.))

My current thinking is that for the model-relative ordinals, you imagine standing on the 'floor' of the model facing the 'back' of the model (when in the 'normal' position) and minX/maxX, minY/maxY, minZ/maxZ are best, given that (for charts anyway) the axis ticks are usually labeled such that the min/max are obvious regardless of their orientation with respect to the viewer.

The much harder problem is naming the 3 of 6 faces that are furthest from the viewer, when the model can be rotated in any amount in any of the 3 planes? I still have no handle on how to term them.

Best try so far: farX is the face(left or right side) at either minX or maxX depending upon orientation; farY is the face(top or bottom) at either minY or maxY depending on orientation; farZ is the face(front or back) that is at either minZ or maxZ depending upon orientation. (Not great!)

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In reply to Re: Naming ordinals in the presence of 3D rotation? (Still looking?) by BrowserUk
in thread Naming ordinals (directions/sides/faces) in the presence of 3D rotation? by BrowserUk

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