What is cad ?


1.Definition.
  Cad - computer aided design: These are softwares that people can use for make plans, drawings, edit drawings,... by computer.

   Before the age of computers, drawings were drafted by hand. CAD is more efficient because the software records lines as vectors based on mathematical equations. Portions of a drawing can be twisted, stretched, or moved. The picture as a whole will automatically adjust.
2. Advantages of CAD.
* Create and edit the drawing easy:
 +  Switch between two-dimensional (2D) and three-dimensional (3D) views.

 + Zoom in and out for close-up and distant views.
 + Rotate images to view them from different perspectives.

 + Change the scale of images: When one value changes, related values are automatically adjusted.
 + Manipulate the shape of images: Changing one portion of an image automatically changes the entire picture.
 + Increase accuracy.
* Save and sent drawing easy.
* Can analyse, calculation durability of sample --> design down time

code: http://architecture.about.com




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