What are 2D CAD Drawings?
1. Product Drawings (which include Manufacturing Drawings, Fabrication Drawings etc.)
2D CAD Drawings are still used by the majority of Fabricators & Manufacturers, even though that most 2D CAD drawings where created from 3D CAD Models. The information that a fabriator/manufacturer basis his work on is still the 2D Drawing. A drawing you can print out on paper and has all the information that is required.
2. Construction Drawings (which include Architectural Drawings, Floor Plans, M&E Drawings etc.)
As with the Product Drawings, installers, builders etc. work from 2D CAD Drawings (Drawings they can print out and read). Depending on the type of drawing required these can either start in 3D (Floor Plans, Elevations etc, Pipe Runs) or in case of M&E Drawings show symbols (Switches, Sockets etc.) on a 2D Floor Plan.
3. Line Drawings (which would include Schematic, MAP Drawings, Simple Layout Drawings)
These drawing are created in CAD Packages such as Autodesk AutoCad or Dassault System Draftsight.
What are the differences between 2D CAD & 3D CAD Drawings?
“2D” is displayed as Two Dimensional geometry which is expressed in length & height on flat planes but has no Depth.
One of the examples is ’Shadow’ which is two dimensional. So, in this way, 2D shapes are typically measured in square units like cm2. Whereas 3D which is defined as 3-dimensional drawings or models they described objects with ‘Depth’. This depth of the object should not be confused with weight, as two objects can be the same depth but here notice that one can be much heavier than the second object like a gallon of milk have less weight than any other heavy object. So, 3D measurement includes cubic unit cm3, quart litres and also tablespoon. So, this the major difference between 2D & 3D.
Therefore, when we apply 3D to physics, they can be seen as three spatially enumerable vectors. Even though there could be several more compactified physical dimensions which are so small that we cannot detect them. There is the concept of the tesseract or hypercube which bears the same relation to a cube that a cube does to a square. An actual tesseract would not be possible to construct with our 3D bodies, but we can build a 3D representation of it.