Twirl Effect

The Twirl effect distorts the image as if it had been twirled.

The effect distorts the image as if it had been twisted.

The following examples show the effect of a Twirl applied with a number of different settings.

[C#]
void function() {
  using (Doc doc = new Doc()) {
    AddImagePage(doc, img3); // original image
    doc.Rendering.Save("EffectTwirl.jpg");
    using (ImageLayer layer = AddImagePage(doc, img3)) {
      using (EffectOperation effect = new EffectOperation("Twirl")) {
        effect.Apply(layer.PixMap);
      }
    }
    doc.Rendering.Save("EffectTwirlDefault.jpg");
    using (ImageLayer layer = AddImagePage(doc, img3)) {
      using (EffectOperation effect = new EffectOperation("Twirl")) {
        effect.Parameters["Angle"].Value = 360;
        effect.Apply(layer.PixMap);
      }
    }
    doc.Rendering.Save("EffectTwirlAngle360.jpg");
    using (ImageLayer layer = AddImagePage(doc, img3)) {
      using (EffectOperation effect = new EffectOperation("Twirl")) {
        effect.Parameters["Extent"].Value = 100;
        effect.Apply(layer.PixMap);
      }
    }
    doc.Rendering.Save("EffectTwirlExtent100.jpg");
  }
}

[Visual Basic]
Sub ...
  Using doc As New Doc()
    AddImagePage(doc, img3)
    ' original image
    doc.Rendering.Save("EffectTwirl.jpg")
    Using layer As ImageLayer = AddImagePage(doc, img3)
      Using effect As New EffectOperation("Twirl")
        effect.Apply(layer.PixMap)
      End Using
    End Using
    doc.Rendering.Save("EffectTwirlDefault.jpg")
    Using layer As ImageLayer = AddImagePage(doc, img3)
      Using effect As New EffectOperation("Twirl")
        effect.Parameters("Angle").Value = 360
        effect.Apply(layer.PixMap)
      End Using
    End Using
    doc.Rendering.Save("EffectTwirlAngle360.jpg")
    Using layer As ImageLayer = AddImagePage(doc, img3)
      Using effect As New EffectOperation("Twirl")
        effect.Parameters("Extent").Value = 100
        effect.Apply(layer.PixMap)
      End Using
    End Using
    doc.Rendering.Save("EffectTwirlExtent100.jpg")
  End Using
End Sub

Original Image before Twirl

After Twirl with default settings

Angle = 360

Extent = 100