Which of the following is the correct set of equations for oblique parallel projection? a) xp = x + z (L1 + cosθ) yp = y + z (L1 + sinθ) b) xp = x + z(L1sinθ) yp = y + z(L1cosθ) c) xp = x – z(L1cosθ) yp = y – z(L1sinθ) d) xp = x + z(L1cosθ) yp = y + z(L1sinθ)
Answer: d Explanation: The set of equations that is correct for oblique parallel projection is – xp = x + z(L1cosθ) yp = y + z(L1sinθ) where, xp and yp are projected coordinates. (x, y, z) are the original coordinates. L1 is the length between the object and the view plane and θ is the angle with the horizontal direction of the projection plane.
