toushou zuhou　投象図法

KEY WORD :　architecture / general terms

Also touei zuhou 投影図法, touei gahou 投影画法. Projection Drawing: a technique used for architectural drawing. Straight lines, called projection lines, are drawn joining various points on a 3-dimentional object to a flat surface, called the projection face. The points on the projection face figure are connected up to make a figure, called a projection drawing. When the projection lines are parallel, the drawing is called a parallel projection drawing heikou touei-zu 平行投影図. When the projection lines are generated from one point or converge into one point, the drawing is called a perspective projection drawing toushi touei-zu 透視投影図.

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