Draws a set of Bezier curves.
Use PolyBezier to draw cubic Bezier curves using the endpoints and control points specified by the Points parameter. The first curve is drawn from the first point to the fourth point, using the second and third points as control points. Each subsequent curve in the sequence needs exactly three more points: the ending point of the previous curve is used as the starting point, the next two points in the sequence are control points, and the third is the ending point.
The Points parameter gives the endpoints to use when generating the Bezier curves.
This procedure draws lines by using the current
Pen.
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In Delphi, you can use the Slice function to pass a portion of an array of points to the PolyBezier method. For example, to form a Bezier curve using the first ten points from an array of 100 points, use the Slice function as follows:
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Control points after a[Index+3] are ignored. Nothing happens if there aren't enough control points.
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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
