Position (absolute) (of an arc point)

The syntax is similar to that for FPTs of STRAs. Possible points are CPT (centre point), FPT (‘from’ point), TPT (‘to’ point) and THPT (‘through’ point).

CPT @

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The command changes the arc to be one with TCOD CENT (if not already so). The Centre is moved whilst keeping the ‘from’ point and ASUB unaltered. The ‘to’-point and radius are recalculated.

THPT @

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The command changes the Arc to be one with TCOD ENDP (if not already so). The position of the ‘through’ point is moved whilst keeping the ‘from’ and ‘to’ points fixed - for example, both radius and angle subtended are altered.

FPT @

TPT @

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For arcs with TCOD ENDP, the ‘from’ or ‘to’ point of the Arc (as appropriate) is moved whilst maintaining the positions of the other end point and the ‘through’ point.

For Arcs with TCOD CENTRE, the ‘from’ or ‘to’ point of the Arc (as appropriate) is moved whilst maintaining the position of the centre and the angle subtended. Thus the radius can change and the position of the other end point is moved to preserve the angle subtended.