Projection of Points

A  POINT
The position of a point in engineering drawing is defined with respect to its distance from the three principle planes i.e., with respect to the VP, HP, & PP.
The point is assumed to be in the respective quadrant shown in figure 1(a).  The point at which the line of sight (line of sight is normal to the respective plane of projection)  intersects the three planes are obtained.  The horizontal plane and the side planes are rotated so such that they lie on the plane containing the vertical plane. The direction of rotation of the horizontal plane is shown in figure 1 (b).

Figure 1(a). The relative positions of projection planes and the quadrants

Figure 1(b). The direction of rotation of the Horizontal plane.