RasterCurve Class

C#
Visual Basic
WinRT C#
Java
Objective-C
WinRT JavaScript
C++

public class RasterCurve

'Declaration

Public Class RasterCurve

'Usage

Dim instance As RasterCurve

public sealed class RasterCurve

function Leadtools.RasterCurve()

public ref class RasterCurve

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.

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

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

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

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;

      
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);
      }
   }
}

Target Platforms

Reference

RasterCurve Members
Leadtools Namespace