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Annotation of researchv10dc/cmd/ideal/RAW_FORMAT, revision 1.1

1.1     ! root        1: The IDEAL program puts out a code that is intended to be device-independent.
        !             2: It looks like TROFF comments so that IDEAL output may be NROFFed safely,
        !             3: or it may be filtered to produce TROFF commands to draw the picture.
        !             4: It may also be run through filters that throw away all text but what
        !             5: appears between .IS and .IE, in which case only the pictures in the
        !             6: document will be run through the plot filter.
        !             7: 
        !             8: Elements of the output:
        !             9: 
        !            10: .IS
        !            11:        start a picture;
        !            12: 
        !            13: ...minx x
        !            14:        x becomes the logical x-coordinate of the upper left corner
        !            15: ...maxy y
        !            16:        y becomes the logical y-coordinate of the upper left corner
        !            17: ...maxx x
        !            18:        x becomes the logical x-coordinate of the lower right corner
        !            19: ...miny y
        !            20:        y becomes the logical y-coordinate of the lower right corner
        !            21: ...width w
        !            22:        scale the picture to be w inches wide
        !            23: ...colwid w
        !            24:        center the picture in a column w inches wide
        !            25: ...line x1 y1 x2 y2
        !            26:        draw a line segment from (x1,y1) to (x2,y2)
        !            27: ...circle x0 y0 r
        !            28:        draw a circle of radius r centered at (x0,y0)
        !            29: ...arc x0 y0 x1 y1 x2 y2 theta1 theta2 r
        !            30:        draw a counterclockwise arc of radius r centered at (x0,y0),
        !            31:        starting at (x1,y1), at an angle theta1,
        !            32:        ending at (x2,y2), at an angle theta2
        !            33: ...spline x0 y0 x1 y1 x2 y2 ...
        !            34:        draw a spline through the points named
        !            35: ...left x0 y0 'string
        !            36:        write string so it starts at (x0,y0)
        !            37: ...center x0 y0 'string
        !            38:        write string so it is centered at (x0,y0)
        !            39: ...right x0 y0 'string
        !            40:        write string so it ends at (x0,y0)
        !            41: .IE
        !            42:        end picture
        !            43: .IF
        !            44:        end picture

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