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RasterCurve Class

Summary

Defines a curve.

Syntax

C++

public class RasterCurve

Public Class RasterCurve

public ref class RasterCurve

Remarks

The RasterCurve class defines the curve to be used with the AddCurveToRegion method to draw a curve using an array of LeadPoint objects. The ToBezierPoints method is used to convert a curve to a Bezier. The RasterCurve class can define two types of curves, RasterCurveType.Standard and RasterCurveType.Bezier.

Example

This sample creates a smooth region that goes through five points, and inverts the region.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using LeadtoolsExamples.Common; 
 
public void RasterCurveExample() 
{ 
   string destFileName = Path.Combine(ImagesPath.Path, "Image1_curveinverted.bmp"); 
 
   // create a new curve object 
   RasterCurve curve = new RasterCurve(); 
 
   // define the the curve 
   curve.Points.Add(new LeadPoint(30, 30)); 
   curve.Points.Add(new LeadPoint(30, 200)); 
   curve.Points.Add(new LeadPoint(130, 130)); 
   curve.Points.Add(new LeadPoint(75, 75)); 
   curve.Points.Add(new LeadPoint(130, 30)); 
 
   curve.Type = RasterCurveType.Standard; 
   curve.FillMode = LeadFillMode.Winding; 
   curve.Tension = 0.5; 
   curve.Close = RasterCurveClose.Close; 
 
   // create an image 
 
   using (RasterImage image = new RasterImage( 
      RasterMemoryFlags.Conventional, 
      250, 
      250, 
      24, 
      RasterByteOrder.Bgr, 
      RasterViewPerspective.BottomLeft, 
      null, 
      IntPtr.Zero, 
      0)) 
   { 
      Assert.IsNotNull(image); 
 
      // fill the image 
      new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Magenta)).Run(image); 
      image.AddCurveToRegion(null, curve, RasterRegionCombineMode.Set); 
 
      // do something with the region 
      new InvertCommand().Run(image); 
 
      // save the image 
      using (RasterCodecs codecs = new RasterCodecs()) 
      { 
         // save the image back to disk 
         codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); 
      } 
   } 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Color 
 
Public Sub RasterCurveExample() 
   Dim codecs As RasterCodecs = New RasterCodecs() 
 
   ' load an image 
   Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp") 
   Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_curveinverted.bmp") 
   Dim image As RasterImage = codecs.Load(srcFileName) 
 
   ' create a new curve object 
   Dim curve As RasterCurve = New RasterCurve() 
 
   ' define the the curve 
   curve.Points.Add(New LeadPoint(30, 30)) 
   curve.Points.Add(New LeadPoint(30, 200)) 
   curve.Points.Add(New LeadPoint(130, 130)) 
   curve.Points.Add(New LeadPoint(75, 75)) 
   curve.Points.Add(New LeadPoint(130, 30)) 
 
   curve.Type = RasterCurveType.Standard 
   curve.FillMode = LeadFillMode.Winding 
   curve.Tension = 0.5 
   curve.Close = RasterCurveClose.Close 
 
   image.AddCurveToRegion(Nothing, curve, RasterRegionCombineMode.Set) 
 
   ' do something with the region 
   Dim cmd As InvertCommand = New InvertCommand() 
   cmd.Run(image) 
 
   ' save the image back to disk 
   codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24) 
 
   ' Cleanup 
   image.Dispose() 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class