Understanding projected drawing modes

Corel DESIGNER provides preset drawing profiles for working in projected drawing modes. After choosing a drawing profile, you then draw or project objects onto its three drawing planes (top, front, and right) to create the illusion of a three-dimensional image. When you close your drawing, the last drawing profile you used is saved along with it; this drawing profile is automatically activated the next time you open the file.

Corel DESIGNER provides ten preset drawing profiles:

• one isometric (default)

• four dimetric

• four trimetric

• one cavalier oblique

You can choose a different drawing profile at any time; however, if you change drawing profiles after you have begun a project, the geometry of your existing objects will not change.

If the preset drawing profiles do not meet your needs, you can create new ones or edit existing ones. For more information, see "Customizing drawing profiles" on page 94.

Each default drawing profile is associated with a set of three numbers, which correspond to the x, y, and z axes, respectively. The x-axis is measured in degrees, clockwise from a line perpendicular to the y-axis. The y-axis is measured in degrees, counterclockwise from the true horizontal, which is 0° east. The z-axis is measured in degrees, counterclockwise from a line perpendicular to the y-axis. The isometric drawing profile, for example, has measurements of (30,90,30) while the cavalier oblique drawing profile has measurements of (0,90,45).

This image depicts a cube displayed using eight different drawing profiles. Top row, left to right: Dimetricl (37,90,37); Dimetric2 (16,90,37); Dimetric3 (7,90,45); Dimetric4 (15,90,15).

Bottom row, left to right: Trimetricl (12,90,23); Trimetric2 (5,90,30); Trimetric3 (45,90,7); Trimetric4 (54,90,17) This image depicts a cube displayed using eight different drawing profiles. Top row, left to right: Dimetricl (37,90,37); Dimetric2 (16,90,37); Dimetric3 (7,90,45); Dimetric4 (15,90,15).

Bottom row, left to right: Trimetricl (12,90,23); Trimetric2 (5,90,30); Trimetric3 (45,90,7); Trimetric4 (54,90,17) In this example, the Dimetric1 drawing profile is depicted. The x-axis is 37° clockwise from a line perpendicular to the y-axis. The y-axis is 105° counterclockwise from the true horizontal. The z-axis is 37° counterclockwise from a line perpendicular to the y-axis. Therefore, the Dimetric1 drawing profile has a value of (37,90,37).

In this example, the Dimetric1 drawing profile is depicted. The x-axis is 37° clockwise from a line perpendicular to the y-axis. The y-axis is 105° counterclockwise from the true horizontal. The z-axis is 37° counterclockwise from a line perpendicular to the y-axis. Therefore, the Dimetric1 drawing profile has a value of (37,90,37).

You can choose to work from one of four drawing planes:

• orthographic — draws on a flat plane, such as the top, front, or right drawing plane

• top — draws onto a projected plane bounded by the x and z axes defined in the drawing profile

• front — draws onto a projected plane bounded by the x and y axes defined in the drawing profile

• right — draws onto a projected plane bounded by the y and z axes defined in the drawing profile

The default drawing plane is orthographic. Although you can change drawing planes at any time, only one drawing plane can be active at a time.