DOI Page / Citation link:
https://doi.org/10.11588/diglit.62828#0401
( 3°9 )
Example VL Fig. 33. Plate XXIV.
How to reprefent a Houfe in PerfpeHive^ having its Front parallel
to the Picture.
Let H L be the horizon, and G R the ground line, r is the
center, and r d the diftance of the picture. Make A C the ori-
ginal length of the front, from which draw vifuals to r. Con-
fider next how far the houfe is removed back, which is here
equal C 1. From 1 draw a line to d, cutting at 7; and from 7
draw a parallel to 8. Draw a plan of the roof 1, 2, 3,4. And
from d the diftance, draw d v parallel to the fide of the roof 1,2;
then will v be the vanifhing point for that fide of the roof.
Take s v and place it below the horizon at V, perpendicular to r;
then will V be the vanifhing point of the other fide of the roof
2, 3. From 8 and 7 raife perpendiculars at pleafure, and make
A F the original height of the front. From F draw a line to r,
cutting at 9 ; draw a parallel from 9 to 10. For the windows
and door, lay their original meafurements on A F and A C,
drawing vifuals to s, as the figure fhews; and as the front is
parallel to the picture, confequently each object on it is fimilar
to their originalsand therefore lines perpendicular to 8,7,
* See pages 274 and 275.
and
Example VL Fig. 33. Plate XXIV.
How to reprefent a Houfe in PerfpeHive^ having its Front parallel
to the Picture.
Let H L be the horizon, and G R the ground line, r is the
center, and r d the diftance of the picture. Make A C the ori-
ginal length of the front, from which draw vifuals to r. Con-
fider next how far the houfe is removed back, which is here
equal C 1. From 1 draw a line to d, cutting at 7; and from 7
draw a parallel to 8. Draw a plan of the roof 1, 2, 3,4. And
from d the diftance, draw d v parallel to the fide of the roof 1,2;
then will v be the vanifhing point for that fide of the roof.
Take s v and place it below the horizon at V, perpendicular to r;
then will V be the vanifhing point of the other fide of the roof
2, 3. From 8 and 7 raife perpendiculars at pleafure, and make
A F the original height of the front. From F draw a line to r,
cutting at 9 ; draw a parallel from 9 to 10. For the windows
and door, lay their original meafurements on A F and A C,
drawing vifuals to s, as the figure fhews; and as the front is
parallel to the picture, confequently each object on it is fimilar
to their originalsand therefore lines perpendicular to 8,7,
* See pages 274 and 275.
and