perspective is obtained is known as picture plane, it is abbreviated as P.P
2, Ground Line : The Iine of intersection of ground plane and vertical or picture plane is called ground
line. It is denoted by G.L.
3, Station Point : lt is the point of sight where all projectors converge
line. It is denoted by G.L.
3, Station Point : lt is the point of sight where all projectors converge
4, Centre of Vision : The point where the line of vision pierce the picture plane is centre ot vision
5, Horizon : Horizontal line drawn through the centre of vision on the picture plane.
6, Vanishing Ponint : It is a point on the picture plane where all the parallel lines appear to converge. This apparent convergence of parallel lines is termed as vanish. All receding parallel lines which run in the same direction appear to vanish at the same point.
7, Angle of Vision : Draw the plan of the object. Join the station point with two extreme corners ot the
object. These two extreme corner lines enclose the Arc of Vision. The angle formed between these
lines is known as the Angle of Vision.
5, Horizon : Horizontal line drawn through the centre of vision on the picture plane.
6, Vanishing Ponint : It is a point on the picture plane where all the parallel lines appear to converge. This apparent convergence of parallel lines is termed as vanish. All receding parallel lines which run in the same direction appear to vanish at the same point.
7, Angle of Vision : Draw the plan of the object. Join the station point with two extreme corners ot the
object. These two extreme corner lines enclose the Arc of Vision. The angle formed between these
lines is known as the Angle of Vision.
8, Measuring Line : The intersection of the plan of the object with the picture plane gives the true height at the point of intersection, when measured in elevation. So any sidę of the object which lies in picture plane shows the true height of the object. All measurement, in respect of height are to be scaled off on this line for getting their sizes in perspective. Some times measuring line is obtained by extending any edge of the object to meet the picture plane and heights are then measured on this line.
9, Eye Level : It is a line at the eve-level of the observer and is represented by a straight line HL. Its true height is measured from ground line. It is normally kept between 1.50 to 1.80 m. i.e. human height.
9, Eye Level : It is a line at the eve-level of the observer and is represented by a straight line HL. Its true height is measured from ground line. It is normally kept between 1.50 to 1.80 m. i.e. human height.
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