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[https://vimeo.com/album/2138596/video/52876519 single straight line] | [https://vimeo.com/album/2138596/video/52876519 single straight line] | ||
about projections <br /> | about projections: <br /> | ||
<gallery> | <gallery> | ||
[[File:übereck.jpg|thumb|250px|]] | [[File:übereck.jpg|thumb|250px|]] | ||
File:übereck.jpg| hypercorner | File:übereck.jpg| hypercorner | ||
</gallery> | </gallery> | ||