Key distinction – isometric vs. perspective: In isometric drawings, vertical and “horizontal” axes remain parallel (no convergence), whereas in perspective drawings, those directions visually converge toward vanishing point(s). Decide whether this comparison statement is accurate.
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ACorrect
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BIncorrect
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COnly true for aerial views
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DOnly when the focal length is infinite
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ETrue only for two-point perspective, not three-point
Answer
Correct Answer: Correct
Explanation
Introduction / Context:Understanding projection types is essential for selecting the right view method. Isometric is a parallel projection; perspective is a central projection with convergence. This question asks you to confirm the fundamental difference.
Given Data / Assumptions:
- Isometric: three axes at 120 degrees; lines parallel in the object remain parallel in the drawing.
- Perspective: receding parallels meet at vanishing points; realism increases with appropriate camera setup.
- Verticals may also converge in three-point perspective.
Concept / Approach:Parallel projection eliminates convergence effects; it preserves parallelism to aid measurement-like interpretation. Perspective mimics human vision: parallel edges not parallel to the picture plane appear to meet at finite vanishing points on or off the horizon.
Step-by-Step Solution:Identify projection type: parallel (isometric) vs. central (perspective).Check for vanishing points: none in isometric; one, two, or three in perspective.Confirm that the statement captures this essential difference.
Verification / Alternative check:Visualize a cube: in isometric, top edges remain parallel; in perspective, edges recede to vanishing points, altering apparent size with distance.
Why Other Options Are Wrong:Restrictions to aerial views, infinite focal length, or specific numbers of vanishing points distract from the general principle.
Common Pitfalls:Assuming orthographic views equal isometric; forgetting that three-point perspective converges verticals too.
Final Answer:Correct