Message - Re: Principles of Roof Profile

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Posted by  Manuel Oliveros on November 30, 2002 at 08:55:40:

In Reply to:  Principles of Roof Profile posted by Wayne Ivory on November 29, 2002 at 18:43:25:

Roofs and where its limit lines stand are best understood by the use of contour lines drawn as if making horizontal sections of the whole roof. Then the sought lines appear by joining the vertices in such contours.

For a same slope and intersecting shapes ridges and valleys appear at bisetrices of the traces with the base horizontal plane.

These things were derived by architects using Descriptive Geometry, itself endowed with an ample array of tools or tricks to solve the problems of orthogonal projection, axonometric and isometric and lineal perspective representation.

Presently most programs use analytical equivalents of the same procedures. The former procedures were themselves drawing solutions to the equivalent analytical problems. Hence enough understanding of 3D geometry is required to program efficiently problems dealing with the representation of objects.

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