Transcript Cut Cylinder

2 point Perspective
Department
of
Technological
Education
Graphic Communication
Dunoon Grammar School
Department of Technological Education
2 Point Perspective
Two views of a house are shown. Using VP1, VP2 and X as the
lowest point, sketch a 2-point perspective view of this house.
X
VP1
• A straight edge may be used.
• Your sketch should be in good proportion
• Do not show hidden detail
X
X
VP2
Department of Technological Education
Ground + Eaves Heights
Start by drawing a ‘height line’ at point X and adding any
building heights onto this line – roof, eaves, doors and window
heights.
X
X
These heights can be measured from the elevations given.
VP1
Project the ground and eaves heights to each VP.
Roof height
Eaves height
Lintel height
Sill height
X
Ground height
VP2
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Estimate Size of Building
Decide how large the house is going to be.
The sizes at this stage are ‘guessed’ but some common sense
needs to be used.
VP1
The elevation containing the door (without the roof) is
square and the proportions of your drawing should reflect
this.
The side of this elevation is slightly longer than
its height and again this information should be
used in your ‘guess’.
X
X
X
VP2
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Centre Part of House
Now that we have decided the size of this part of the building
the rest of the shell can be drawn by projecting each of the
corners to the VP’s.
X
X
VP2
VP1
X
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Drawing First Gable
The other visible part of the building is produced in the same
way.
Decide how far the building protrudes. It should
look about half the width of the front part of the
building.
VP1
Decide how wide the building is. This part of the
elevation should look square in proportion.
Project the edges to the VP’s.
X
X
X
VP2
Department of Technological Education
Drawing Second Gable
The third part of the building can now be constructed.
In real life it is the same size as the part just drawn, but
because you are drawing in perspective your drawing should
actually have it slightly smaller.
X
X
VP2
VP1
X
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Finding Apex of Roof (1)
To find the apex of the roof we can use a simple geometry
technique. We know that the apex is in the centre of the
elevation, so by drawing diagonal lines on the elevation we
can accurately find the centre of the elevation.
VP1
By projecting this point up until it crosses the projected line
from VP1 we can find the apex point and draw the pitch of
the roof
Complete this part of the drawing by projecting the apex of
the roof to VP2
X
X
X
VP2
Department of Technological Education
Finding Apex of Roof (2)
Repeat this process to find the apex of the roof for the other
visible elevation.
X
VP1
To find the correct height of the apex of this roof it will be
necessary to project the height from the height line along
each of the elevations until it meets the elevation being
worked on.
X
X
VP2
Department of Technological Education
Finding Apex of Roof (3)
The final gable of the building is completed the same way as
the two already done.
Any gulley details where two or more roofs meet can also be
added at this time.
X
X
VP2
VP1
X
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Outline of Building
The building can now be darkened.
Two lines from the elevation containing the front door have not
been darkened because the step will stop all of these lines
being seen. This will be dealt with later in the drawing.
X
X
VP2
VP1
X
Department of Technological Education
Windows + Doors
The next process is to add any architectural detail such as
windows and doors. The construction and hidden lines have
been removed to make the drawing easier to understand, but
some construction lines that will be used during this stage have
not been deleted.
VP1
Using the height line, add projected lines across each of
the elevations for the heights of doors and windows.
X
X
X
VP2
Department of Technological Education
First Window
The windows and doors can now be drawn onto the
elevations.
X
X
Care should be taken when ‘guessing’ where the lines for
these parts of the building are placed.
VP1
In the case of this building the window on the gable is central
on the wall. From the given elevations it can be calculated
that the corner of the window is just outside where the
diagonal lines pass at the top of the window.
X
VP2
Department of Technological Education
Second Window
The second window is also central on the wall.
On this occasion we should consider proportions. On the
given elevation the window takes up about half of the width
of the wall with the gap at each side equal.
VP1
In your drawing the perspective should be
considered, and as the wall goes into the distance the
sizes should be drawn slightly smaller.
X
X
X
VP2
Department of Technological Education
Third Window (1)
The third window is also central on the wall.
Using diagonal lines will locate the position of the centre of the
window.
X
X
VP2
VP1
X
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Third Window (2)
One side of the window is located, in this case the edge
closer to the back of the house.
X
X
By using some simple geometry techniques we can now
calculate where the other side of the window should be
drawn.
VP1
Draw diagonal lines across the window.
Project a line from VP2 through the centre of the
diagonals until it cuts the join between the 2 windows.
Draw a diagonal line through both windows using the
centre point. The point found is the near side of the
window frame.
X
VP2
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Front Detail
The front elevation is done in the same way as the others.
The edge of the door is in line with the apex of the roof and
this gives a good start point for finding the positions of the
door and window.
X
X
VP2
VP1
X
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Step Detail
The final part of the drawing to construct is the front step.
Use the height line to get the correct height for the step.
VP1
The rest of the construction is similar to the rest of the
house.
X
X
X
VP2
Department of Technological Education
Outline of Building
The final parts of the drawing can now be darkened.
X
X
VP2
VP1
X
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Final Drawing
This is the final drawing of the house.
X
X
VP2
VP1
X
PowerPoint Presentation produced by John McRae, Nairn Academy 2003