Fig. 281.
The shadow of the eave of a roof can be obtained in the same way. Take any point thereon, mark its trace on the ground, and then proceed as above.
[ CLVIII]
Shadow on a Retreating Wall, Sun in Front
Let L be the luminary. Raise vertical LF. F will be the vanishing point of the shadows on the ground. Draw Lf· parallel to FS. Drop Sf· from point of sight; f· (so found) is the vanishing point of the shadows on the wall. For shadow of roof draw LE and f·B, giving us e, the shadow of E. Join Be, &c., and so draw shadow of eave of roof.
For shadow of K draw lines from luminary L to meet those from f· the foot, &c.
The shadow of D over the door is found in a similar way to that of the roof.