WPF: How to apply a GeneralTransform to a Geometry data and return the new geometry?

Having some Geometry data and a Transform how can the transform be applied to the Geometry to get a new Geometry with it's data transformed ?

Ex: I Have a Path object that has it's Path.Data set to a PathGeometry object, I want to tranform the points of the PathGeometry object in place using a transform, and not apply a transform to the PathGeometry that will be used at render time.

P.S. I know that the Transform class has a method Point Transform.Transform(Point p) that can be used to transform a Point but...is there a way to transform a arbitrary geometry at once?

Edit: See my repply for a currently found solution

You could try and use Geometry.Combine. It applies a transform during the combine. One catch is that Combine only works if your Geometry has area, so single lines will not work.

Here is a sample that worked for me.

PathGeometry geometry = new PathGeometry();
geometry.Figures.Add(new PathFigure(new Point(10, 10), new PathSegment[] { new LineSegment(new Point(10, 20), true), new LineSegment(new Point(20, 20), true) }, true));
ScaleTransform transform = new ScaleTransform(2, 2);
PathGeometry geometryTransformed = Geometry.Combine(geometry, geometry, GeometryCombineMode.Intersect, transform);

WPF+How+to+apply+a+GeneralTransform+to+a+Geometry+data+ , Having some Geometry data and a Transform how can the transform be applied to the Geometry to get a new Geometry with it's data� WPF: How to apply a GeneralTransform to a Geometry data and return the new geometry? (2) Having some Geometry data and a Transform how can the transform be applied to the Geometry to get a new Geometry with it's data transformed ?

I've found a solution with which arbitrary tranform can be applied to a path geometry, thanks to Todd White's answer:

Basically Geometry.Combine is used to combine the desired geometry with Geometry.Empty using Union, and the desired transform is given. The resulting geometry is transformed with the given transform.

PathGeometry geometryTransformed = Geometry.Combine(Geometry.Empty, geometry, GeometryCombineMode.Union, transform);

PathGeometry.cs, The new Geometry will be based on the current value of all properties. /// </param > public static PathGeometry CreateFromGeometry(Geometry geometry) { if� c# - WPF: How to apply a GeneralTransform to a Geometry data and return the new geometry? Having some Geometry data and a Transform how can the transform be applied to the Geometry to get a new Geometry with it's data transformed ? Ex: I Have a Path object that has it's Path.Data set to a…

This is what I found you can do to get a transformed geometry with all of the figure information intact:

var geometry = new PathGeometry();
geometry.Figures.Add(new PathFigure(new Point(10, 10), new PathSegment[] { new LineSegment(new Point(10, 20), true), new LineSegment(new Point(20, 20), true) }, true));
geometry.Transform = new ScaleTransform(2, 2);

var transformedGeometry = new PathGeometry ();
// this copies the transformed figures one by one into the new geometry
transformedGeometry.AddGeometry (geometry); 

Path figure values after transform has been applied., Windows Presentation Foundation (WPF) Once I apply a transform to the Path object is there an easy way to I don't think you can get the transformed path geometry in the way http://stackoverflow.com/questions/249971/wpf-how-to- apply-a-generaltransform-to-a-geometry-data-and-return-the-new-� Use a StreamGeometry when you need to describe a complex geometry but do not want the overhead of supporting data binding, animation, or modification. For example, because of its efficiency, the StreamGeometry class is a good choice for describing adorners.

I didn't use accepted answer since it was returning geometry in format different from the original one, so I used this:

Geometry inputGeometry = new PathGeometry();
var inputGeometryClone = inputGeometry.Clone(); // we need a clone since in order to
                                                // apply a Transform and geometry might be readonly
inputGeometryClone.Transform = new TranslateTransform(); // applying some transform to it
var result = inputGeometryClone.GetFlattenedPathGeometry();

Cut geometry, Cut a geometry along a polyline. Data � New Basemap Style; New Web Map; New Web Scene; New Story Map Use case. You might cut a polygon representing a large parcel to subdivide it into Loop through the returned list of part geometries. <UserControl x:Class="ArcGISRuntime.WPF.Samples. CutGeometry. It returns a Geometry, but that is an abstract class. I am creating a text shape and want to cache this geometry. That BuildGeometry could returns different types, feels suspect and therefore I may

None of the quick solutions based on Geometry.Combine works in the case of path made of a single LineElement. So I solved the problem the hard way, like this (But I am also limited to PathGeometry):

public static class GeometryHelper
{
public static PointCollection TransformPoints(PointCollection pc, Transform t)
{
  PointCollection tp = new PointCollection(pc.Count);
  foreach (Point p in pc)
    tp.Add(t.Transform(p));
  return tp;
}
public static PathGeometry TransformedGeometry(PathGeometry g, Transform t)
{
  Matrix m = t.Value;
  double scaleX = Math.Sqrt(m.M11 * m.M11 + m.M21 * m.M21);
  double scaleY = (m.M11 * m.M22 - m.M12 * m.M21) / scaleX;
  PathGeometry ng = g.Clone();
  foreach (PathFigure f in ng.Figures)
  {
    f.StartPoint = t.Transform(f.StartPoint);
    foreach (PathSegment s in f.Segments)
    {
      if (s is LineSegment)
        (s as LineSegment).Point = t.Transform((s as LineSegment).Point);
      else if (s is PolyLineSegment)
        (s as PolyLineSegment).Points = TransformPoints((s as PolyLineSegment).Points, t);
      else if (s is BezierSegment)
      {
        (s as BezierSegment).Point1 = t.Transform((s as BezierSegment).Point1);
        (s as BezierSegment).Point2 = t.Transform((s as BezierSegment).Point2);
        (s as BezierSegment).Point3 = t.Transform((s as BezierSegment).Point3);
      }
      else if (s is PolyBezierSegment)
        (s as PolyBezierSegment).Points = TransformPoints((s as PolyBezierSegment).Points, t);
      else if (s is QuadraticBezierSegment)
      {
        (s as QuadraticBezierSegment).Point1 = t.Transform((s as QuadraticBezierSegment).Point1);
        (s as QuadraticBezierSegment).Point2 = t.Transform((s as QuadraticBezierSegment).Point2);
      }
      else if (s is PolyQuadraticBezierSegment)
        (s as PolyQuadraticBezierSegment).Points = TransformPoints((s as PolyQuadraticBezierSegment).Points, t);
      else if (s is ArcSegment)
      {
        ArcSegment a = s as ArcSegment;
        a.Point = t.Transform(a.Point);
        a.Size = new Size(a.Size.Width * scaleX, a.Size.Height * scaleY); // NEVER TRIED
      }
    }
  }
  return ng;
}
}

c#, WPF: How to apply a GeneralTransform to a Geometry data and return the new geometry? 发表于 2008-10-30 12:15:46. 活跃于 2014-12-17 09:38:47. Defines functionality that enables transformations in a 2-D plane. Transformations include rotation (RotateTransform), scale (ScaleTransform), skew (SkewTransform), and translation (TranslateTransform). This class hierarchy differs from the Matrix structure because it is a class and it supports animation and enumeration semantics.

WPF:如何将GeneralTransform应用于几何数据并返回新几何?, Data设置为PathGeothology对象,我想通过转换转换转换到位的PathGeothology 对象的点,而不是将转换应用于呈现时将使用 WPF: How to apply a GeneralTransform to a Geometry data and return the new geometry? 来源: link� var path = new Path(); path.Data = Geometry.Parse("M 100,200 C 100,25 400,350 400,175 H 280"); Path.Data is of type Geometry. Using Reflector JustDecompile (eff Red Gate), I looked at the definition of Geometry for its TypeConverterAttribute (which the xaml serializer uses to convert values of type string to Geometry).

Plot Geometry, Geometries in the Canvas are rendered as Paths whose Data property follows the for each shapes type (points, line, rings) that return their path data as svg strings. Geometry) = let shape = geom |> toShape let path = new Path() let data RenderTranform can be used to scale, skew, rotate and translate a wpf control. Hi. I need to check if a circle is "inside" another shape (rectangle, polygon). I was thinking of checking if the edge of the circle is inside the edge of the other shape, but I don't have any idea on how to accomplish this.

WPF: Как применить GeneralTransform к данным Geometry и , Вопрос по теме: c#, .net, wpf, transform, geometry. Data, установленный для объекта PathGeometry, я хочу преобразовать Add(new PathFigure(new Point(10, 10), new PathSegment[] { new Transform(p)); return tp; } public static PathGeometry TransformedGeometry(PathGeometry g, Transform t) { Matrix m = t . WPF already provides a few value converts, but you will soon need to implement your own converts. To do this, add a class to your project and call it [SourceType]To[TargetType]Converter . This is a common naming for value converters.

Comments
  • If you actually find a way to do this ... I'm using it too. Heh heh.
  • The only problem is that the combined geometry is not the same as the original geometry. Differences aren't big but might be important.
  • This appears to be the correct way to do it, as no StandardFlatteningTolerance appears to be applied.
  • Not sure why this was down voted as it seems the only correct answer.
  • Do you actually get the transformed geometry? Applying CreateFromGeometry on a PathGeometry returns the same geometry (same points). You're not transforming the geometry but simply adding the transform property.
  • you can transform anything, even sizes and angles, besides, I know that you can transform points individually, and also my geometry is not frozen. I wanted to know if there's a framework way to apply transformations to an geometry object as a whole.