﻿ ToBezierPoints Method (RasterCurve) | Leadtools | Raster, Medical, Document Help
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# ToBezierPoints Method

Summary

Converts the curve points to an array of Bézier points.

Syntax
C#
VB
C++
``public LeadPoint[] ToBezierPoints() ``
``Public Function ToBezierPoints() As LeadPoint() ``
````public: `
`array<LeadPoint>^ ToBezierPoints();  ````

#### Return Value

An array of LeadPoint values that contain the Bézier points.

Remarks

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).

Example

This sample draws a smooth closed curve on a graphics that goes through five points.

C#
VB
````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 ````
Requirements