DEFINE AXES
- Last UpdatedFeb 01, 2023
- 2 minute read
Purpose
Establish the axes direction and ships origin.
Syntax
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DEFINE ( AXES )( /FRAMES ) ( /AFT ) |
Description
All curves are defined with respect to a right handed Cartesian axis system. The origin of the ship is user selectable and can be placed at any longitudinal X position on the centreline.
For further explanations on the global axis system refer to Section 3.1
Command Qualifiers
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/FRAME /AFT or /FORWARD |
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This allows the user to set the building frame direction. The position of the frame 0 and spacing is set in the Frame Table using the CREATE FRAME command. |
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/ORIGIN |
This allows the user to set the position of the ship's origin. It may be placed at any position along the X-axis. |
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If /AP or /FP or /MID are used then the origin will be set at the Aft, Forward and Midship positions respectively. |
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If the /X=$N is used then the origin will be placed at the given distance from the AP. |
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The /AFT and /FORWARD options indicate the direction of the Section numbering. |
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/SHOW |
This allows the user to show the current settings of the axes parameters. |
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/STATION |
This allows the user to set the set the station numbering and the incremental direction of stations. If the station value given for the AP is greater than that given for FP then the station numbering will increase towards the aft. |
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/LHS |
Specify that the axis system is left handed (positive Y on the port side) |
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/RHS |
Specify that the axis system is right handed (positive Y on the starboard side) |
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/BEAM |
If the /HALF qualifier is given, then the design is assumed to be symmetric and only the half beam is shown in section and waterline views. If the /FULL qualifier is given, then the full beam is shown in section and waterline views. |
Examples
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DEFINE AXES /ORIGIN /AP |