Page 130 - DCAP313_LAB_ON_COMPUTER_GRAPHICS

Lab on Computer Graphics

Notes 8.1.4 Shear
Figure 8.10 is viewing the point shearing.

Figure 8.10: Shearing

È 1 shearx˘
shear along x axis = Í ˙
Î 0 1 ˚
È 1 0˘
shear along y axis = Í ˙
Î sheary 1 ˚
Self Assessment Questions

1. The …………….. for the x dimension does not have to be the same as the y dimension.

(a) rotations (b) translations
(c) scaling (d) shearing

2. The basic ……………….. are with respect to the origin.
(a) rotations (b) translations

(c) scaling (d) shearing
3. Changing the size of an object is called a………………….

(a) vertex (b) scale

(c) matrix (d) origin
4. Coordinates multiplied by the scaling factor:

(a) Scale by (Sx Sy) (b) translate origin back
(c) x’ = sx*x (d) None of these

5. In case of rotation, object can be rotated about x or y axis.

(a) True (b) False

8.2 Concept of Implementing of Scaling in 2D Transformation

Changing the size of an object is called a scale. We scale an object by Changing the size of an
object is called a scale.

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