5.9. Coordinate Systems

*DEFINE_COORDINATE_SYSTEM

Specifies a local coordinate system with three points: one at the local origin, one on the local x-axis and one on the local x-y plane.

Card1

  • CID = ID of the coordinate system, must be unique.

  • XO = global X-coordinate of the origin.

  • YO = global Y-coordinate of the origin.

  • ZO = global Z-coordinate of the origin.

  • XL = global X-coordinate of a point on the local x-axis.

  • YL = global Y-coordinate of a point on the local x-axis.

  • ZL = global Z-coordinate of a point on the local x-axis.

Card2

  • XP = global X-coordinate of a point on the local x-y plane.

  • YP = global Y-coordinate of a point on the local x-y plane.

  • ZP = global Z-coordinate of a point on the local x-y plane.

*DEFINE_VECTOR

Specifies a vector by defining the coordinates of two points. This keyword defines the local coordinate system with respect to which a *BOUNDARY_PRESCRIBED_MOTION is prescribed. The ID of this coordinate system is specified with parameter CID.

Card

  • VID = ID of the vector.

  • XT = 0, the local x-coordinate of the origin of the coordinate system specified with CID below.

  • YT = 0, the local y-coordinate of the origin of the coordinate system specified with CID below.

  • ZT = 0, the local z-coordinate of the origin of the coordinate system specified with CID below.

  • XH = 1 if the vector has a component in the x direction of the coordinate system specified with CID. Otherwise, this is set to 0.

  • YH = 1 if the vector has a component in the y direction of the coordinate system specified with CID. Otherwise, this is set to 0.

  • ZH = 1 if the vector has a component in the z direction of the coordinate system specified with CID. Otherwise, this is set to 0.

  • CID = ID of the coordinate system used to define the vector. If no coordinate system is specified this parameter is set to 0 to specify the global coordinate system.