Ed Leafe wrote:
> On Jul 12, 2007, at 10:35 AM, Bill Bedford wrote:
>
>> Is there any support for arcs? They would be useful for a upcoming
>> project of mine.
>
> Not currently, but wxPython has the following methods:
>
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>
> wxDC::DrawArc
>
> void DrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord
> xc, wxCoord yc)
>
> Draws an arc of a circle, centred on (xc, yc), with starting point
> (x1, y1) and ending at (x2, y2). The current pen is used for the
> outline and the current brush for filling the shape.
>
> The arc is drawn in an anticlockwise direction from the start point
> to the end point.
>
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>
> wxDC::DrawEllipticArc
>
> void DrawEllipticArc(wxCoord x, wxCoord y, wxCoord width, wxCoord
> height, double start, double end)
>
> Draws an arc of an ellipse. The current pen is used for drawing the
> arc and the current brush is used for drawing the pie.
>
> x and y specify the x and y coordinates of the upper-left corner of
> the rectangle that contains the ellipse.
>
> width and height specify the width and height of the rectangle that
> contains the ellipse.
>
> start and end specify the start and end of the arc relative to the
> three-o'clock position from the center of the rectangle. Angles are
> specified in degrees (360 is a complete circle). Positive values mean
> counter-clockwise motion. If start is equal to end, a complete
> ellipse will be drawn.
>
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>
>
>
> Do these look like they would be useful? If so, I can wrap those
> like the other draw methods.
It's kind of weird that for the circle you specify a center and two
endpoints,
but for the ellipse you specify the rectangle and and an angle. Specifying a
center and angle for the circular arc would seem more natural to me. (Also,
what happens if the endpoints you specify aren't the same distance from the
center point?) Would it be possible to get a dabo wrapper that lets you
specify
the center and angle?
--
--Brendan Barnwell
"Do not follow where the path may lead. Go, instead, where there is no path,
and leave a trail."
--author unknown
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