BASICS OF 3D MODELLING

BASICS OF MODELLING

Hi Good Morning to every body, as i posted on Pro-Engineer article i am here to say about basics of modelling. Generally modelling of a 3D model is done from a 2D drawing. These 2D drawings are generally called as Orthographic projections. See the below image

In the above image the drawings on right side are orthographic views of the left sided 3D model. These are connected by lines known as projectors. These 3 views are three faces of 3D model.And based on views we can divide them as 

1. First angle 
2. Third angle 

First angle is a type of projection in which the object lies between observer and plane.In this projection the object is situated in first quadrant. All Indian standards comes under first angle type

In case of third angle the plane situates between object and observer.Object is situated in third quadrant.Third angle is generally used by British standards.

Everybody has a doubt how to select type of projection used, but is basically the standard of company is to be used.But i will give a small example

1. When a bottle is on table we can use by common sense first angle.But if bottle lies in a aquarium the plane lies between observer and object. This is small example i known.