Converts the curve points to an array of Bézier points.
public LeadPoint[] ToBezierPoints()
Public Function ToBezierPoints() As Leadtools.LeadPoint()
public:
Leadtools.array<LeadPoint>^ ToBezierPoints();
An array of LeadPoint values that contain the Bézier points.
This method is used to convert a standard curve to an array of Bézier control points. A standard curve (RasterCurveType.Standard) is defined by the current RasterCurve. The standard curve passes through all of the points in the Points collection, and is continuous at each point. This method can be used to draw a curve by converting it to an array of Bézier points, using System.Drawing.Graphics.DrawBeziers to draw the equivalent Bezier(s).
This sample draws a smooth closed curve on a graphics that goes through five points.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using LeadtoolsExamples.Common;
public void ToBezierPointsExample()
{
// Define the curve
RasterCurve curve = new RasterCurve();
curve.Points.Add(new LeadPoint(130, 130));
curve.Points.Add(new LeadPoint(130, 300));
curve.Points.Add(new LeadPoint(230, 230));
curve.Points.Add(new LeadPoint(175, 175));
curve.Points.Add(new LeadPoint(230, 130));
curve.Type = RasterCurveType.Standard;
curve.FillMode = LeadFillMode.Winding;
curve.Tension = 0.5;
curve.Close = RasterCurveClose.Close;
// convert this curve into bezier points
LeadPoint[] bezierPoints = curve.ToBezierPoints();
// Draw this curve on a bitmap
using (System.Drawing.Bitmap btmp = new System.Drawing.Bitmap(400, 400))
{
using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(btmp))
{
g.FillRectangle(System.Drawing.Brushes.White, new System.Drawing.Rectangle(0, 0, 400, 400));
// Convert the LeadPoint array to a Point array
System.Drawing.Point[] pts = new System.Drawing.Point[bezierPoints.Length];
for (int i = 0; i < bezierPoints.Length; i++)
{
pts[i] = new System.Drawing.Point(bezierPoints[i].X, bezierPoints[i].Y);
}
g.DrawBeziers(System.Drawing.Pens.Black, pts);
}
// save this image to disk
string fileName = Path.Combine(ImagesPath.Path, "ToBezierPoints.bmp");
btmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Bmp);
}
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Color
Public Sub ToBezierPointsExample()
' Define the curve
Dim curve As RasterCurve = New RasterCurve()
curve.Points.Add(New LeadPoint(130, 130))
curve.Points.Add(New LeadPoint(130, 300))
curve.Points.Add(New LeadPoint(230, 230))
curve.Points.Add(New LeadPoint(175, 175))
curve.Points.Add(New LeadPoint(230, 130))
curve.Type = RasterCurveType.Standard
curve.FillMode = LeadFillMode.Winding
curve.Tension = 0.5
curve.Close = RasterCurveClose.Close
' convert this curve into bezier points
Dim bezierPoints As LeadPoint() = curve.ToBezierPoints()
' Draw this curve on a bitmap
Using btmp As New System.Drawing.Bitmap(400, 400)
Using g As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(btmp)
g.FillRectangle(System.Drawing.Brushes.White, New System.Drawing.Rectangle(0, 0, 400, 400))
' Convert the LeadPoint array to a Point array
Dim pts(bezierPoints.Length - 1) As System.Drawing.Point
For i As Integer = 0 To bezierPoints.Length - 1
pts(i) = New System.Drawing.Point(bezierPoints(i).X, bezierPoints(i).Y)
Next
g.DrawBeziers(System.Drawing.Pens.Black, pts)
End Using
' save this image to disk
Dim fileName As String = Path.Combine(LEAD_VARS.ImagesDir, "ToBezierPoints.bmp")
btmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Bmp)
End Using
End Sub
Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
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