Grazing incidence — where it appears
Named by 2 essays across one field — each of them below, with the objects they name alongside it.
Also named here as stretch — the same set of essays touches all of them, so they are one junction rather than several.
The design that outruns the floor
A pavement anamorph of a design forty per cent of eye height needs two metres of floor. Eighty per cent needs thirteen. Ninety-four per cent needs fifty, ninety-nine per cent needs three hundred and seventeen, and the sky needs an infinite one — because the ray through a design point level with the eye never comes down. Depth times the height still to go, divided by the height already reached, is the eye's own distance at every point of the family.
The anamorph that crosses a corner
Cast one design onto a floor and the wall at the end of it, from one eye. Each plane gets a collineation of its own; the two agree on the line where the planes meet, exactly, because a point of that line is a point of both. What they do not agree about is scale — the design runs 7.8 times its own size along the floor and 2.0 times up the wall, and the jump at the join is a factor of 3.9.
Named alongside it
The objects these essays reach for when they reach for this one.
AnamorphosisGround planeHomologyPicture planeStretchAsymptoteCollineationContinuityDihedralForeshorteningHorizonPiecewise map