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Table of Contents
4. Standard Units
4.37. Graph - Graph unit
4.37.2. Graph Unit Procedures and Functions
4.37.2.20. FillPoly procedure
4.37.2.20. FillPoly procedure
Targets: MS-DOS, Win32
Graph Unit
Fills a polygon, using the scan converter
Declaration:
procedure FillPoly(NumVert: DWORD; var Vert);
Remarks:
Vert is an untyped parameter that contains the coordinates
of each vertex in the polygon. NumVert specifies the number of
coordinate pairs in Vert. A coordinate pair consists of
two Longint values, an X and a Y value. FillPoly
calculates all the horizontal intersections, and then fills it using the
current fill style and color defined by
SetFillColor,
SetFillPattern or
SetFillStyle.
This function is different from Borland's GRAPH unit.
Polygons must have angles less than 180 degrees.
That is, they must be convex.
2) Invalid polygon
If you want to draw polygon (2), you must split it up
into two valid polygons:
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