Question

Which co-ordinates allow common vector operations such as translation, rotation, scaling and perspective projection to be represented as a matrix by which the vector is multiplied.

(a) vector co-ordinates

(b) 3d co-ordinates

(c) affine co-ordinates

(d) homogenous co-ordinates

I got this question by my school teacher while I was bunking the class.

This question is from Transformations between Coordinate Systems and Affine Transformations in chapter 2D Transformation and Viewing of Computer Graphics

Answer 1

Correct answer is (d) homogenous co-ordinates

The explanation is: The function of homogenous co-ordinates is to allow common vector operations such as translation, rotation, scaling and perspective projection to be represented as a matrix by which the vector is multiplied.