From the station point, draw aline parallel to the side of thecottage until it strikes thepicture plane. From this pointdrop a line down to the horizonline to establish the right-handvanishing point.
Repeat the previous step toestablish the left-handvanishing point.
Drop a line from the corner abdown to the ground line. Asthe line ab touches the pictureplane it is a true length inperspective.
Connect ab to the twovanishing points to establishthe front receding walls of thecottage.
Draw a line of sight from thespectator to cd in plan.Where this line of sight cutsthe picture plane drop avertical line which willindicate the depth of thereceding wall in perspective.
Draw in the front recedingwalls of the cottage.
A height line may be use to findthe height of the apex (gh) ofthe cottage. Extent the line ghin plan until it reaches thepicture plane. From here drop aline perpindicular to the pictureplane. From the ground linestep up the height h.
Draw a line from the right-hand vanishing point to theheight h. Drop the points gand h down perpindicular tothe picture plane to meet theline.