/// <summary>
/// 线圈所在外包矩形
/// </summary>
/// <returns></returns>
static public Polygon2d BoundingRectangle(this Polygon2d polygon2d)
{
//【】下方注释方法的时间需要进行测试
//Box2d box2D = polygon2d.MinimalBoundingBox(double epsilon)
double wight = 0;
double height = 0;
Vector2d center = polygon2d.Center(ref wight, ref height);
return(Polygon2d.MakeRectangle(center, wight, height));
}
public void TrimSegment2d_SegmentEndsOutside()
{
// Arrange
var square = new GeneralPolygon2d(Polygon2d.MakeRectangle(new Vector2d(-1, 0), new Vector2d(1, 1)));
var seg = new Segment2d(new Vector2d(0, -1), new Vector2d(0, 2));
// Act
var result = square.TrimSegment2d(seg);
// Assert
Assert.AreEqual(1, result.Count);
AssertExtensions.AreEqual(new Vector2d(0, 0), result[0].P0);
AssertExtensions.AreEqual(new Vector2d(0, 1), result[0].P1);
}
public void TrimSegment2d_SegmentEndsPartial()
{
// Arrange
var square = new GeneralPolygon2d(Polygon2d.MakeRectangle(new Vector2d(-1, 0), new Vector2d(1, 1)));
var seg = new Segment2d(new Vector2d(0, 0.1), new Vector2d(0, 2));
// Act
var result = square.TrimSegment2d(seg);
// Assert
Assert.AreEqual(1, result.Count);
Assert.IsTrue(new Vector2d(0, 0.1).EpsilonEqual(result[0].P0, Epsilon));
Assert.IsTrue(new Vector2d(0, 1).EpsilonEqual(result[0].P1, Epsilon));
}
public void TrimSegment2d_SegmentAcrossHole()
{
// Arrange
var square = new GeneralPolygon2d(Polygon2d.MakeRectangle(new Vector2d(0, 0), 4, 4));
var hole = Polygon2d.MakeRectangle(new Vector2d(0, 0), 2, 2);
hole.Reverse();
square.AddHole(hole);
var seg = new Segment2d(new Vector2d(0, -4), new Vector2d(0, 4));
// Act
var result = square.TrimSegment2d(seg);
// Assert
Assert.AreEqual(2, result.Count);
AssertExtensions.AreEqual(new Vector2d(0, -2), result[0].P0);
AssertExtensions.AreEqual(new Vector2d(0, -1), result[0].P1);
AssertExtensions.AreEqual(new Vector2d(0, 1), result[1].P0);
AssertExtensions.AreEqual(new Vector2d(0, 2), result[1].P1);
}