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If a ‘3 x 3’ matrix shears in Y direction, how many elements of it are ‘0’?(a) 2(b) 3(c) 6(d) 5This question was posed to me in an interview for internship.Question is from 2D Reflection and Shear in chapter 2D Transformation and Viewing of Computer Graphics

Answer»

Correct CHOICE is (d) 5

The best explanation: The ‘3 x 3’ matrix which shears in ‘y’ direction will have TOTAL 9 elements, 3 of which are ‘1’, 5 zeroes and 1 VARIABLE in a lower TRIANGLE which is the scaling factor.



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