| Draw.FillPolygon |
| Syntax | Draw.FillPolygon (x, y : array 1 .. * of int, n : int, Color : int)
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| Description | The Draw.FillPolygon procedure is used to draw a filled polygon with n points. The polygon is described by the points (x(1), y(1)) to (x(2), y(2)) to (x(3), y(3)) and so on to (x(n), y (n)). The polygon will be drawn and filled with Color. To get an polygon outlined in a different color, use Draw.FillPolygon with the Color parameter set to the fill color and then call Draw.Polygon with the Color parameter set to the border color.
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| Example | This program will create a filled octagon and display it in bright blue and then outline it in cyan.
View.Set ("graphics")
var x : array 1..8 of int := init (100, 100, 135, 185,
220, 220, 185, 135)
var y : array 1..8 of int := init (100, 150, 185, 185,
150, 100, 65, 65)
Draw.FillPolygon (x, y, 8, brightblue)
Draw.Polygon (x, y, 8, cyan)
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| Execute | |
| Details | The PC allows a maximum of 256 points. As well, Draw.FillPolygon can fail (due to lack of memory). If failure occurs, it will try to draw an outline of the polygon. If that also fails, it will not draw anything. The screen must be in a "graphics" mode. See the View.Set procedure for details. If the screen is not in a "graphics" mode, an error will occur.
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| Status | Exported qualified. This means that you can only call the function by calling Draw.FillPolygon, not by calling FillPolygon.
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| See also | View.Set, maxx, maxy and the various procedures in the Draw unit.
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