Moving the Head or Tail
- Last UpdatedNov 17, 2025
- 1 minute read
Keywords:
MOVE BY DISTANCE
Description:
This command allows the Head or Tail position to be moved by a specified distance, relative to its current position, in the direction of PH or PT. Alternatively, it allows the Head or Tail to be moved by an amount specified in any coordinates.
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Examples: |
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MOVE PT DIST -2000 |
Moves the Tail by 2000 from its current position, in the opposite direction to PT. |
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MOVE PT BY X2000 S500 |
Moves the Tail by 2000 East and 500 South from its current position |
Command Syntax:
>-- MOVe --+-- PHead --.
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|-- HHead --|
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|-- PTail --|
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‘-- HTail --+-- BY <pos> --+-- WRT --.
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| |-- IN ---+-- <gid> -->
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| ‘-->
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‘-- DISTance <uval> -->
Querying:
>-- Query --+-- PHead ------.
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|-- PTail ------|
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|-- HTail ------|
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|-- HHead ------|
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|-- HPosition --|
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‘-- TPosition --+-->
Figure 3:4. Moving the Head or Tail