58 COMPUTER AIDED ENGINEERING DESIGN
Draw
(a) An isometric projection of the block.
(b) A dimetric projection of the block for shz = 0.5 (ψ = ± 20.7, φ = ± 22.21 for shx = shy).
(c) A trimetric projection with φ = 30°,ψ = 45° (rotations about y- and x- axes, respectively) and
projection on the z = 0 plane.
(d) Orthographic projections on the three coordinate planes.
Figure 2.26 Isometric projections for various views (rotation angles) of the block
y
z
x
O
–4 –3 –2 –1 0 1 2 3 4 5
3
2
1
0
–1
–2
–3
–4
(a)φ = –45°,ψ = 35.26°
0 123456
5 4 3 2 1 0
–1
–2
(b)φ = 45°,ψ = 35.26°
–4 –3 –2 –1 0 1 2 3 4 5
6 5 4 3 2 1 0
(d)φ = –45°,ψ = –35.26°
012345 6
4
3
2
1
0
–1
–2
–3
(c)φ = 45°,ψ = –35.26°