Description

Argument: D #
Description: drawing area number designation
Options: integer numbers
Default: current drawing area

See the D command for more information about this argument.

Argument: C #
Description: curve number designation
Options: integer number
Default: current curve

See the C command for more information about this argument.

Argument: <l>
Description: angle l in degrees
Options: real numbers
Default: -1.0

Argument: <phi>
Description: angle phi in degrees
Options: real numbers
Default: -10.0

Argument: <theta>
Description: angle theta in degrees
Options: real numbers
Default: 30.0

The angles <theta>, <phi>, and <l> are defined in ChIPS the same way as they are defined in the SM engine: Surfaces are drawn from a direction (<theta>,<phi>), and projected onto a surface passing through the origin. The projection is from a point <l> away from the nearest corner of the cube containing the image. If <l> is:

• positive - a perspective projection is used
• zero (0) - the viewpoint is taken to be infinitely far from the surface
• negative - an axonometric projection is used (i.e. the surface is projected from infinity onto the X-Z plane)

The coordinate system is right-handed and is oriented such that the Z-axis is <theta> = 90 and (<theta>,<phi>)=(0,0). Angles are taken to be in degrees, with theta lying in (-90,90) and <phi> lying in (-180,180). The nearest corner of the cube containing the surface is projected onto the point (0,0).