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Annotation of pmsdk/samples/linefrac/linefrac.doc, revision 1.1

1.1     ! root        1: PM LineFractal Program
        !             2: ----------------------
        !             3: 
        !             4: General Description:
        !             5: --------------------
        !             6: 
        !             7: This program draws self-similar fractals defined by transformations
        !             8: of the unit interval.  By recursively applying the transformation,
        !             9: neat drawings result.
        !            10: 
        !            11: Currently you can only choose the built-in transforms. Click on one
        !            12: to get that fractal at the current level of recursion. Choose level
        !            13: one (from the Fractal attributes dialog box), and one side to the
        !            14: frame polygon (same dialog box), to see the transformation itself.
        !            15: 
        !            16: Clicking on the left mouse button causes the fractal to go deeper
        !            17: into recursion, while clicking on the right causes it to come back
        !            18: out.
        !            19: 
        !            20: In the attributes dialog box you can specify "# sides of polygon",
        !            21: which is the number of initial segments to which your transform
        !            22: will be applied.  You always get a regular polygon of the number
        !            23: of sides you choose.
        !            24: 
        !            25: With the current limited set of transforms, you can still get some
        !            26: interesting effects by drawing a new fractal on top of old ones
        !            27: with varying line attributes.
        !            28: 
        !            29: Note that at recursion level n, an m-segment transform will be
        !            30:              n
        !            31: composed of  m  line segments.  Keep this in mind when playing with
        !            32: the 5-segment transforms, namely StovePipe and Esses.
        !            33: 
        !            34: The names are, except for Koch (mathematician who proved, I think,
        !            35: that the Koch curve has infinite arc length when the level of recursion
        !            36: goes to infinity), weak attempts to describe the basic shape, Esses
        !            37: being the most far-fetched (sort of like maybe roughly resembling
        !            38: S-curves on a race track?).
        !            39: 
        !            40: 
        !            41: Description of commands:
        !            42: ------------------------
        !            43: 
        !            44: File
        !            45:     About
        !            46:        Show the credits.
        !            47: 
        !            48: Transform
        !            49:     SharkTooth         (2 segments)
        !            50:     SawTooth           (3 segments)
        !            51:     Koch               (4 segments, with two segments causing reflection)
        !            52:     StovePipe          (5 segments, with two segments causing reflection)
        !            53:     Esses              (5 segments)
        !            54: 
        !            55:        Click on one of these to select a similarity transform for your
        !            56:        fractal.
        !            57: 
        !            58: Environment
        !            59:     Clear bitmap
        !            60:        Clear the bitmap to the background color.
        !            61: 
        !            62:     AutoScale
        !            63:        If checked, the bitmap will be resized every time you change
        !            64:        the window size (even if you iconize).
        !            65: 
        !            66:        If not checked, the bitmap will stay the same size and won't
        !            67:        be redrawn when the window size changes.
        !            68: 
        !            69:     Line attributes ...
        !            70:        Calls up a dialog box in which you can select the following
        !            71:        values:
        !            72: 
        !            73:            line color
        !            74:            line style
        !            75:            line mix mode
        !            76: 
        !            77:            bitmap background color
        !            78: 
        !            79:            # sides to initial polygon
        !            80: 
        !            81:            number of points sent to GpiPolyLine at a time
        !            82: 
        !            83:            level of recursion at which to draw
        !            84: 
        !            85:            whether or not to clear the bitmap between fractals
        !            86: 
        !            87: Control
        !            88:     Redraw
        !            89:        Forces the fractal to be redrawn.
        !            90: 
        !            91:     Abort drawing
        !            92:        Causes drawing of current fractal, if any, to cease.

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