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📗 [1 points] Which of the following are equivalent to context.rotate(Math.PI / 2); context.rotate(Math.PI / 2);? context.rotate(Math.PI); context.rotate(-Math.PI); context.rotate(2 * Math.PI); context.rotate(-2* Math.PI); context.rotate(90); None of the above.
📗 [1 points] Suppose a group in SVG has <g stroke="red", fill="green" transform="translate(10 10)">, and there is a rectangle inside the group <rect x="0" y="0" stroke="blue")>, which of the following are attributes of the rectangle? stroke="blue" fill="green" transform="translate(10 10)" fill="" stroke="red" None of the above.
📗 [1 points] Which of the following transformations are linear in 2D? Rotation Scaling Identity Shearing Translation None of the above.
📗 [1 points] If the rotation matrix with angle r is [[a, b], [c, d]], what is the rotation matrix with angle -r? (This should apply to any value of r.)
📗 Note: for 2D rotation matrices [[a, c], [b, d]] and [[a, -b], [-c, d]] happens to be identical, so they are both correct answers. [[a, c], [b, d]] [[a, -b], [-c, d]] [[d, b], [c, a]] [[-a, b], [c, -d]] [[a, b], [c, d]] None of the above.
📗 [1 points] Which of the following are properties of a rotation matrix [[a, b], [c, d]] in 2D? a * d - b * c > 0 a * c + b * d = 0 a * a + b * b = 1 a * d + b * c = 0 a * a + d * d = 1 None of the above.
📗 [1 points] Which ones of the following are matrices for scaling? [[2, 0], [0, 2]] [[2, 0], [0, -2]] [[-2, 0], [0, 2]] [[0, 2], [2, 0]] [[0, -2], [-2, 0]] None of the above.
📗 [1 points] What is the 2D point if its homogeneous coordinates in 3D are [8, 4, 2]? [4, 2] [8, 4] [16, 8] [2, 4] [4, 8] None of the above.
📗 [1 points] What is the transformation matrix if a unit square with vertices [0, 0], [1, 0], [0, 1], [1, 1] is transformed in [2, 3], [4, 5], [6, 7], [8, 9] (order does not matter)? context.transform(2, 2, 4, 4, 2, 3) context.transform(4, 4, 2, 2, 2, 3) context.transform(6, 6, 4, 4, 2, 3) context.transform(2, 2, 6, 6, 2, 3) context.transform(4, 5, 6, 7, 2, 3) None of the above.
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