Oblique projection

Oblique projection is a simple type of technical drawing and graphical projection used for producing two-dimensional images of three-dimensional objects. It is a form of parallel projection, in which all the projection lines are orthogonal to the projection plane, but are at an angle to the plane of the object.

Etymology

The term "oblique projection" is derived from the Latin word "obliquus", which means "slanting, sideways, or indirect", and the word "projection", which comes from the Latin "proiectio", meaning "a throwing forward".

Types of Oblique Projection

There are three types of oblique projection: cavalier, cabinet, and general.

• Cavalier projection is a type of oblique projection in which the projection lines are parallel to each other and at a 45-degree angle to the plane of the object. This results in a full-scale view of the object, but it can appear distorted due to the angle of projection.

• Cabinet projection is another type of oblique projection in which the projection lines are parallel to each other and at a 63.4-degree angle to the plane of the object. This results in a half-scale view of the object, which can appear more realistic than the cavalier projection.

• General projection is a type of oblique projection in which the projection lines are not parallel to each other and can be at any angle to the plane of the object. This allows for a more flexible view of the object, but it can be more difficult to create.

Applications

Oblique projection is commonly used in technical drawing and computer graphics. It is particularly useful for creating quick, simple sketches of complex objects, as it allows for a clear view of the object's front and side without the need for perspective. However, it is not as realistic as other types of projection, such as perspective projection, and is therefore not typically used for final, detailed drawings.

See Also

• Technical drawing
• Graphical projection
• Cavalier projection
• Cabinet projection
• General projection
• Perspective projection

References

Oblique projection Resources
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