What is the geometric projection technique called when a plane is placed between the observer and the object?

What is the geometric projection technique called when a plane is placed between the observer and the object?

• A. Orthographic projection
• B. Perspective projection
• C. Isometric projection
• D. Axonometric projection

Answer: (A)

When the projection plane sits between the observer and the object and the projection lines are perpendicular to that plane, you’re performing orthographic projection. This setup uses parallel projection, so objects don’t appear smaller as they recede; dimensions are preserved along directions parallel to the plane. It’s the go-to method for engineering drawings because it communicates true shape and size without perspective distortion. Perspective projection, on the other hand, uses lines that converge toward the viewer’s eye, causing objects to shrink with distance. Isometric and axonometric are specific orientations of parallel (orthographic) projection, but the general technique described by “a plane between the observer and the object” is orthographic projection.

When the projection plane sits between the observer and the object and the projection lines are perpendicular to that plane, you’re performing orthographic projection. This setup uses parallel projection, so objects don’t appear smaller as they recede; dimensions are preserved along directions parallel to the plane. It’s the go-to method for engineering drawings because it communicates true shape and size without perspective distortion. Perspective projection, on the other hand, uses lines that converge toward the viewer’s eye, causing objects to shrink with distance. Isometric and axonometric are specific orientations of parallel (orthographic) projection, but the general technique described by “a plane between the observer and the object” is orthographic projection.