Transformations

Question 1

Which matrix scales an object by (0.5, 2.0, 8.0)?

Answer 1

0. 5, 0.0, 0.0, 0.0,
1. 0, 2.0, 0.0, 0.0,
2. 0, 0.0, 8.0, 0.0,
3. 0, 0.0, 0.0, 1.0

Question 2

Which matrix translates an obejct by (1.0, 2.0, 3.0)?

Answer 2

1. 0, 0.0, 0.0, 1.0,
2. 0, 1.0, 0.0, 2.0,
3. 0, 0.0, 1.0, 3.0,
4. 0, 0.0, 0.0, 1.0

Question 3

Which operations result in a shear matrix? By multiplying…?

Answer 3

x-scaling with y-rotation,

y-scaling with z-rotation

Question 4

Which rule does NOT apply in terms of matrix operations?

Answer 4

Commutative law: AB = BA

Question 5

Which transformation undoes a scaling by (2.0, 0.5, 4.0)?

Answer 5

Scale: (0.5, 2.0, 0.25)

Question 6

Which transformation undoes a translation by (3.0, -2.0, 0.5)?

Answer 6

Translate: (-3.0, 2.0, -0.5)