Draws a series of lines on the canvas connecting the points passed in and closing the shape by drawing a line from the last point to the first point.
Use Polygon to draw a closed, many-sided shape on the canvas, using the value of Pen. After drawing the complete shape, Polygon fills the shape using the value of Brush.
The Points parameter is an array of points that give the vertices of the polygon. The first point is always connected to the last point.
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In Delphi, you can use the Slice function to pass a portion of an array of points to the Polygon method. For example, to form a polygon using the first ten points from an array of 100 points, use the Slice function as follows:
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To draw a polygon on the canvas, without filling it, use the Polyline method, specifying the first point a second time at the end.
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This FMX version of the method adds a default Opacity parameter at the end of the parameters. This allows you to take advantage of the FMX ability to draw transparently to the canvas. Alternatively, don't set this parameter and it works exactly like the VCL TCanvas method. |
Namespace: FMX.RS.CanvasHelper
Delphi |
public |
Parameters
Points
Type: array of TPoint
Opacity
Type: Single
