Allow 60-80min - this is a double lesson
Aim:
To create a perspective grid using a single measurement and
three vanishing points but vanishing toward the CVP. We will also
introduce the freehand method of constructing
curves.
Materials:
The sketch pad,
HB pencil,
ruler.
Construct margin and title box then:
a) Measure intervals of 24mm (1") along the base margin as shown and join to RVP.
b) Where they cross the vertical line from CVP draw horizontal lines as above.
c) Add lines to CVP from marked intervals
d) Extend and complete.
e) Shade alternate tiles.
f) Add two more rows to the outside.
g) Clean up with eraser if necessary.
Revise ask:
What does RVP stand
for?
What is the horizon?
How is it we can make a drawing with
depth on a flat surface?
EXPLAIN :
The 'flat' surface is like a window or a sheet of glass. It
is called a 'picture plane' (PP). The 'observer', the person looking
is standing a distance behind the PP and the floor is a particular
distance in front of the PP.
At this point we need to interrupt our
drawing to learn to draw circles. Since we have no tools to trace or
guide us we will need to learn to draw these - freehand. We need to
know this to complete our current project. So start a new sheet and
...
By John Hagan
Information supplied by: http://www.geocities.com