Have you ever thought about the life cycle of a building? In olden times, designers used paper and pencil to create drawings, but this modern generation employs sophisticated, sleek and super-fast computers to do the same work more accurately and efficiently. Computers use Computer Aided Design, in short CAD, as a designing tool to produce different models or designs of various products or infrastructures. Different types of CAD Drafting are available to serve different purposes, depending upon the degree of complexity.
Different types of CAD drafting
Designing of any dream project can be done using different CAD systems. The fundamental type of CAD includes two dimension models. More complex projects can make use of 3-dimensional wire frame, 3-dimensional dumb solids, 3-dimensional parametric solid modeling, explicit modelers, and free-form surface modeling CAD programs.
It is a simple orthographic projection in which each aspect uses a two dimensional view in the X and Y axis. Lines, circles, ovals, slots and curves are mainly used to create 2D drafts. In addition to this, it has a good collection of geometric images and a skilled person can create flat drawings based on them. It is very useful for architects as they do not require in-depth knowledge about the structures. AutoCAD, CADkey, CADDS 5, CATIA v4 and Medusa are some of the widely used 2D CAD.
2.5D or Two-and-a-half Dimensional
It also works on the basics of geometric objects and uses isometric projections to create pseudo 3D images. It can be used to obtain planometric, oblique and perspective views, which show all the three dimensions.
It creates virtual objects which can be rotated in 360 degrees around three different axes, and unlike the other two, 3D gives the true depth of a design. It can generate realistic models most accurately, enabling the designers to solve potential problems at the earlier stages of design itself, saving you from unwanted onsite costs. Autodesk Inventor, CoCreate Solid Designer, Pro/Engineer SolidEdge, SolidWorks, Unigraphics NX and VX CAD are some of the 3D CAD programs.
3D CAD and its different varieties:
- 3D Wireframe
It is outdated model, which can be considered as an extension of 2D drafting, and uses series of connected lines to represent objects.
- Surface Modeling
It is a rarely used model as it is difficult to incorporate much basic functionalities to the design. It is designed for the manipulation of real world objects. The 3D view is created by drawing surfaces to the objects.
- Solid Modeling
It uses the basic geometric forms, such as cones, cylinders, cuboids and prisms to generate 3D models. Future modification of an object directly relates to how it was originally created and it can calculate the dimension of the objects. Many sub-types of this exist and Constructive Solid Geometry (CSG) is one of them that use the same basic logic of 2D CAD.
CAD is very user friendly and can produce the result in a breath taking 3D models. A drafter with good knowledge in building design and a little creativity can make outstanding blueprints using CAD drafting techniques.