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3D CAD
The use of CAD for the perception of 3D geometries offers additional advantages for the solution of architectural problems, not available by traditional means. Model data is stored as a database of points (vectors) that can be rearranged and displayed to user's will. This makes the modelling process more flexible and easy to update; changes are immediatly displayed,and a set of options can be assembled in a short period of time. On the other hand, the exclusion of environmental information (colors, materials, shadows and light) limit the usefulness of this kind of models, and make them of little use for non architecturally trained people. 3D geometris can be ported to net as images, but not directly as drawing files, unless additional software is used. In addition to this, is not possible to control the desired views and angles of the drawing. At the moment on line 3D viewers rely on VRML (Virtual Reality Modelling Language)as the preferred tool for the display and building of 3D geometries over the internet. The main drawbacks related to VRML rely on computing platforms and network limitations; to be able to see a VRML model, 3D browsers are needed, and specially, a very fast Internet connection is a must, otherways the data transfer can be too slow to suit any purpose.This drawbacks slow the on-line browsing of tridimensional models for practical purposes. |
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