First Angle and Third Angle Projection | First Angle Projection | Third Angle Projection (HINDI)
#First Angle vs
#Third Angle Projection
#First angle projection is a method of creating a 2D drawing of a 3D object. This means that the vertical plane is behind the object and the horizontal plane is underneath the object. First angle projection method is used in Europe, India, Canada and the rest of world as a default projection system.
#Third angle projection is a method of creating a 2D drawing of a 3D object. In third angle, the object is placed in the third quadrant. This means that the plane of projection is between the observer and the object. Third angle projection is used in Australia and United States as a default projection system for industrial designs for product fabrication.
#The object is placed in the first quadrant for the first angle projection.
#The object is placed in the third quadrant for the third angle projection.
To get the first angle projection, the object is placed between the plane of projection and the observer.
To get a third angle projection, the plane of projection is between the observer and the object.
In the first angle projection, the plane of projection is assumed to be opaque or non-transparent.
The object is placed in front of the planes and each view is pushed through the object which places the vertical plane behind the object and pushes the horizontal plane underneath.
In the third angle projection, the plane of projection is assumed to be transparent and the object is placed below the horizontal plane and behind the vertical plane.
The right side view is projected to the left of the front view and the top view is projected onto the bottom of the front view. (1st Angle)
The right view is projected onto the right side of the front view and the top view is projected above the front view. (3rd Angle)
First angle projection method is used in Europe, India, Canada and the rest of world as a default projection system.
Third angle projection is used in Australia and United States as a default projection system for industrial designs for product fabrication.