LESSON - PERSPECTIVE NINE - SHADOWS 2

Time:
Allow 40min - teacher preparation minimal.
Aim:
To learn how to plot shadows on differing surfaces. Here we shall plot and draw the shadow of a ladder leaning against a wall
Materials;
The sketch pad,HB pencil, ruler.

To Begin revise: Method of introducing light source and estimating its ground position. Ask which way the shadow should be directed, forward or back.

Construct margin and title box then:

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b) Construct the simple corner of a room using a CVP.

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c) This 'oblique' line will represent one runner of the ladder. Call it 'ab'

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d) 'cd' is parallel to 'ab'. Construct as shown with lines to VP.

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e) Add the ladder 'rungs' and firm them in.

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f) Establish the light source - drop to floor and construct shadow lines as demonstrated above.

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g) This diagram shows the method of constructing a shadow cast by one of the 'rungs.'

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h) Shade in the shadow 'freehand' as shown.

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i) Complete the shadow and add other appropiate details

Home study :
Experiment, add other objects ... a bucket on the floor and its shadow.

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i) Construct and complete the shadow as shown and shade it in. The student should note that if point 'a' is brought forward the shadow will point backward.

Home study :
Experiment, try adding some other objects such as vertical poles and draw their shadows.