Glossary

Boolean operations

Boolean operations, named after the mathematician George Boole (1815–64), have three logics relevant to the use of the term in this primer when applied to solid geometry. The first is the union of two solids, the second the intersection of two solids and the third the subtraction of one solid from another. In terms of their relevance to scripting, Boolean operations can only be performed with a minimum of two solids ‘A’ and ‘B’ at least partially intersecting in space. In the first, union, ‘A’ is fused with ‘B’; intersection calls for the identification of the material that is common to both ‘A’ and ‘B’; with subtraction, the result of what is left when ‘B’ is subtracted from ‘A’.

Clerestory

Formerly applying specifically to a wall with windows that rises above the roofline of a lower adjacent aisle, as an architectural term the clerestory describes the upper levels of Roman basilicas or the naves of Romanesque or Gothic churches. In modern usage, the term is used to describe any high windows above eye level that let in light and/or fresh air.

Crossing

A crossing, in ecclesiastical architecture, is the junction of the four arms of a cruciform (cross-shaped) church. In a typically oriented church (especially of Romanesque or Gothic style), the crossing gives access to the nave on the west, the transept arms on the north and south, and the choir on the east.

Diurnal

Is the antonym of nocturnal and means active during the day.

Doric (order)

Relates to ...

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