Paraline Drawings

Principles:

A paraline drawing is a three-dimensional representation used to illustrate the relationships of planes and volumes. In this type of drawing, edges and surfaces that are parallel in the physical model are also parallel in the drawing.

Some types of drawings are more analytic than representational. Instead of mimicking the form or space as it would actually appear, analytic drawings are intended to convey information that is not visible to the eye.

Isometrics are a type of paraline drawing where the relationship of depth to height to width is 1:1:1.

An oblique is a type of paraline drawing where projection lines have an oblique angle to the picture plane. With a plan oblique the plan retains its size and shape. With an elevation oblique the elevation retains its size and shape.

Assignment:

On trace paper or vellum construct an isometric paraline drawing. Choose from one of the types described below. Use your orthographic drawings as underlays.

A plan oblique rotated at 45 degrees (left)

An elevation oblique with 45 degree projection (center)

 combined plan and elevation oblique (right)

Examples

Plan Oblique. In the example below the roof has been removed so we can see inside. 

Elevation Oblique. In the example below the faces in the short dimension are true to their elevations. 

Combined Plan & Elevation Oblique

Assessment: The basis for your grade will be craftsmanship, accuracy, and the meeting of the constraints described above.

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