public void ConvertingTwoTouchingRectanglesProducesInvalidMultipolygon()
{
var sg = new StreamGeometry();
using (var ctx = sg.Open())
{
ctx.BeginFigure(new WpfPoint(0, 0), true, true);
ctx.LineTo(new WpfPoint(0, 10), true, false);
ctx.LineTo(new WpfPoint(10, 10), true, false);
ctx.LineTo(new WpfPoint(10, 0), true, false);
ctx.LineTo(new WpfPoint(0, 0), true, false);
ctx.BeginFigure(new WpfPoint(10, 5), true, true);
ctx.LineTo(new WpfPoint(10, 15), true, false);
ctx.LineTo(new WpfPoint(20, 15), true, false);
ctx.LineTo(new WpfPoint(20, 5), true, false);
ctx.LineTo(new WpfPoint(10, 5), true, false);
}
sg.Freeze();
var area = sg.GetArea();
var geometry = WpfGeometryReader.Read(sg, Geometries.GeometryFactory.Default);
Assert.AreEqual(area, geometry.Area, 1e-4);
}
public void ConvertingARectangleWithAHoleProducesInvalidMultipolygon()
{
var sg = new StreamGeometry();
using (var ctx = sg.Open())
{
ctx.BeginFigure(new WpfPoint(0, 0), true, true);
ctx.LineTo(new WpfPoint(0, 10), true, false);
ctx.LineTo(new WpfPoint(10, 10), true, false);
ctx.LineTo(new WpfPoint(10, 0), true, false);
ctx.LineTo(new WpfPoint(0, 0), true, false);
ctx.BeginFigure(new WpfPoint(4, 4), true, true);
ctx.LineTo(new WpfPoint(4, 6), true, false);
ctx.LineTo(new WpfPoint(6, 6), true, false);
ctx.LineTo(new WpfPoint(6, 4), true, false);
ctx.LineTo(new WpfPoint(4, 4), true, false);
}
sg.Freeze();
var area = sg.GetArea();
var geometry = WpfGeometryReader.Read(sg, Geometries.GeometryFactory.Default);
Assert.AreEqual(area, geometry.Area, 1e-4); // Fails. Area is 104.
}
//---------------------------------------------------------------------------------------------------------
/// <summary>
/// Вычисление площади графического примитива
/// </summary>
/// <returns>Площадь графического примитива</returns>
//---------------------------------------------------------------------------------------------------------
public override Double ComputeArea()
{
return(mGeometry.GetArea());
}