[英]Strange behavior of FillContains method
我正在尝试使用来自Geometry类的fillContains方法来检测geometry1是否在geometry2内,但是当geometry1放置在第一个几何的右侧或底部边缘时,我遇到了问题。 这是一个非常奇怪的结果:
var rect = new Rect(new Point(0, 0), new Point(100, 100));
RectangleGeometry geometry1 = new RectangleGeometry(rect);
var rect2 = new Rect(new Point(0, 0), new Size(10, 10));
RectangleGeometry geometry2 = new RectangleGeometry(rect2);
var rect3 = new Rect(new Point(90, 90), new Size(10, 10));
RectangleGeometry geometry3 = new RectangleGeometry(rect3);
var rect4 = new Rect(new Point(90, 80), new Size(10, 10));
RectangleGeometry geometry4 = new RectangleGeometry(rect4);
Assert.True(geometry1.FillContains(geometry2));
Assert.True(geometry1.FillContains(geometry3));
Assert.True(geometry1.FillContains(geometry4)); // Assertion failed
您能帮我正确的方法吗?
可能与公差有关...或与几何相交算法有关......也许它们正在以某种方式缩放值...并且取决于所使用的值会导致相交检查得出意外结果(例如,当点为90、80时)。
我对您的代码进行了一些扩展,以显示有关这两个几何形状如何相交的更多详细信息,并希望允许进行一些操作以确定原因。
var rect = new Rect(new Point(0, 0), new Point(100, 100));
RectangleGeometry geometry1 = new RectangleGeometry(rect);
var rect2 = new Rect(new Point(0, 0), new Size(10, 10));
RectangleGeometry geometry2 = new RectangleGeometry(rect2);
var rect3 = new Rect(new Point(90, 90), new Size(10, 10));
RectangleGeometry geometry3 = new RectangleGeometry(rect3);
var rect4 = new Rect(new Point(90, 80), new Size(10, 10));
RectangleGeometry geometry4 = new RectangleGeometry(rect4);
var rect4fits = new Rect(new Point(90, 80), new Size(9, 10));
RectangleGeometry geometry4fits = new RectangleGeometry(rect4fits);
double tolerance = 0.25; // same as standard flattening tolerance
ToleranceType tolerancetype = ToleranceType.Relative;
var bcontains2 = geometry1.FillContains(geometry2);
var bcontainsdetail2 = geometry1.FillContains(geometry2, tolerance, tolerancetype);
var detail2 = geometry1.FillContainsWithDetail(geometry2);
var detailtolerance2 = geometry1.FillContainsWithDetail(geometry2, tolerance, tolerancetype);
var bcontains3 = geometry1.FillContains(geometry3);
var bcontainsdetail3 = geometry1.FillContains(geometry3, tolerance, tolerancetype);
var detail3 = geometry1.FillContainsWithDetail(geometry3);
var detailtolerance3 = geometry1.FillContainsWithDetail(geometry3, tolerance, tolerancetype);
var bcontains4 = geometry1.FillContains(geometry4);
var bcontainsdetail4 = geometry1.FillContains(geometry4, tolerance, tolerancetype);
var detail4 = geometry1.FillContainsWithDetail(geometry4);
var detailtolerance4 = geometry1.FillContainsWithDetail(geometry4, tolerance, tolerancetype);
var bcontains4fits = geometry1.FillContains(geometry4fits);
var bcontainsdetail4fits = geometry1.FillContains(geometry4fits, tolerance, tolerancetype);
var detail4fits = geometry1.FillContainsWithDetail(geometry4fits);
var detailtolerance4fits = geometry1.FillContainsWithDetail(geometry4fits, tolerance, tolerancetype);
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