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Projection types

A projection is a mapping of space onto one or more planes - pay people to do your homework . If the straight lines through the points of the spatial image and through the corresponding image points are parallel to each other, this is called a parallel projection.

If the straight lines through the points and corresponding image points all intersect at one point, this is called a central projection.

In parallel projection, a distinction is made between oblique and perpendicular parallel projection (orthogonal projection), depending on the size of the angle that the projection lines form with the image plane.

The image of an object in an oblique parallel projection is called an oblique image. Among the many ways of drawing an oblique image, the cavalier projection - geometry problem solver (cavalier perspective, Figure 3) has a prominent position because of its vivid representation and simple construction features.

The following features should be noted:

- The front surface of the body is shown in true size.

- Depth contours are drawn at an angle of 45°.

- Depth contours are shortened by half.

The following characteristics apply to a vertical parallel projection:

The plane that is under the body is called the ground plane. The image of the body in this plane is called the ground plan and corresponds to the view of the body from above (top view). The plane behind the body is called the elevation plane.

The image of the body in this plane is called the elevation and corresponds to the view of the body from the front - homework help geometry . If these two views are displayed in one plane, the result is a two-panel image. By viewing additional views (up to a total of six), multi-panel images can be displayed.

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