Transcript Technology Department Higher Graphic Communication

Banff Academy
Technology Department
Higher Graphic Communication
• Measured Perspective
• Revision
Always ensure that you have positioned the plan correctly and to the correct
scale.You must also draw in the correct position the Picture (or Projection
Plane), the Ground Line and the Eye Level.
el
gl
pp
sp
First project from the Spectator Point and determine the position of the LH and
the RH vanishing points. Then decide which height lines should be produced.
2
vpl
el
gl
pp
vpr
1
0
hl1
hl2
sp
First produce the left facing gable of the house using the LH VP and
HL1
2
el
gl
pp
vpl
vpr
1
0
hl1
hl2
sp
Next using VPL and HL2 produce the left facing gable of the porch
2
el
gl
pp
vpl
vpr
1
2
1
0
0
hl1
hl2
sp
Now project the remaining corners of the house and the porch
2
el
gl
pp
vpl
vpr
1
2
1
0
0
hl1
hl2
sp
Now line in the outline of the house and porch.
2
el
gl
pp
vpl
vpr
1
2
1
0
0
hl1
hl2
sp
The lined-in house and porch.
vpl
Either use a new height line to produce the windows or use the existing
height line for the house gable and project round the walls of the house
as shown below, care must be taken though.
2
vpl
1
0
hl1
vpr
Having marked out the position of the windows on the plan, now view
the windows from the spectator point and project these onto the
perspective view.
2
el
gl
pp
vpl
vpr
1
0
hl1
sp
By continuing the technique of projecting in perspective round the
walls, the position of the front door can be determined. See the
projection lines in blue below.See next slide for clarification.
2
el
gl
pp
vpl
vpr
1
0
hl1
sp
Note the top of the door and the top of the window are at the same
height . Note where the blue perspective line for the top of the door
passes through the intersection of the purple perspective line for the top
of the window and the corner of the porch.
2
EL
vpl
vpr
1
GL
PP
0
hl1
sp
Now line in the door as shown below.
2
1
vpl
0
hl1
The completed drawing of the house and porch is shown below.
Good luck with your NAB test!!