Name

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      PROTRACTOR

Purpose

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      Measure angles on the screen.

Category

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Calling Sequence

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      protractor

Inputs

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Keyword Parameters

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Keywords

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        ANGLE=a measured angle returned.
        LENGTH=len measured lengths returned as 2 element array.
        FACTOR=f Length conversion factor (def=1).
        COLOR=c Plot color to use (def=!p.color).
        /QUIET suppresses messages.

Outputs

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Common Blocks

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      protractor_com

Notes

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      Notes: lengths are listed and returned in pixels unless
        over-ridden by FACTOR.

Modification History

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      R. Sterner, 12 Feb, 1993 (inspired by Bob Taylor's angle.pro).
      R. Sterner, 16 Mar, 1993 --- added no erase exit.
      R. Sterner, 16 Mar, 1993 --- added exit coordinate list.
  Copyright (C) 1993, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.