public void Test_GetCentroid_Polygon()
{
// Checks that points and polylines are ignored when computing the centroid.
Assert.True(S2.ApproxEquals(
new S2Point(S2.M_PI_4, S2.M_PI_4, S2.M_PI_4),
S2ShapeIndexMeasures.GetCentroid(MakeIndexOrDie("5:5 # 6:6, 7:7 # 0:0, 0:90, 90:0"))));
}
public void Test_GetDimension_PointsLinesAndPolygons()
{
Assert.Equal(2, S2ShapeIndexMeasures.GetDimension(MakeIndexOrDie(
"0:0 # 1:1, 2:2 # 3:3, 3:4, 4:3")));
Assert.Equal(2, S2ShapeIndexMeasures.GetDimension(MakeIndexOrDie("# # empty")));
}
public void Test_GetCentroid_Polyline()
{
// Checks that points are ignored when computing the centroid.
Assert.True(S2.ApproxEquals(
new S2Point(1, 1, 0),
S2ShapeIndexMeasures.GetCentroid(MakeIndexOrDie("5:5 | 6:6 # 0:0, 0:90 #"))));
}
public void Test_GetPerimeter_WrongDimension()
{
Assert.Equal(S1Angle.Zero,
S2.GetPerimeter(MakeIndexOrDie("0:0 # #").Shape(0)));
Assert.Equal(S1Angle.Zero,
S2ShapeIndexMeasures.GetPerimeter(MakeIndexOrDie("0:0, 0:1, 1:0")));
}
public void Test_GetCentroid_Polyline()
{
// GetCentroid returns the centroid multiplied by the length of the polyline.
Assert.True(S2.ApproxEquals(
new S2Point(1, 1, 0),
S2ShapeIndexMeasures.GetCentroid(MakeIndexOrDie("0:0, 0:90"))));
}
public void Test_GetDimension_PointsAndLines()
{
Assert.Equal(1, S2ShapeIndexMeasures.GetDimension(MakeIndexOrDie("0:0 # 1:1, 1:2 #")));
// Note that a polyline with one vertex has no edges, so it is effectively
// empty for the purpose of testing GetDimension().
Assert.Equal(1, S2ShapeIndexMeasures.GetDimension(MakeIndexOrDie("0:0 # 1:1 #")));
}
public void Test_GetDimension_Points()
{
Assert.Equal(0, S2ShapeIndexMeasures.GetDimension(MakeIndexOrDie("0:0 # #")));
// Create an index with an empty point set.
MutableS2ShapeIndex index = new();
index.Add(new S2PointVectorShape());
Assert.Equal(0, S2ShapeIndexMeasures.GetDimension(index));
}
public void Test_GetArea_Empty()
{
Assert.Equal(0.0, S2ShapeIndexMeasures.GetArea(MakeIndexOrDie("# #")));
}
public void Test_GetPerimeter_DegeneratePolygon()
{
Assert2.Near(4.0, S2ShapeIndexMeasures.GetPerimeter(MakeIndexOrDie(
"4:4 # 0:0, 1:0 | 2:0, 3:0 # 0:1, 0:2, 0:3")).GetDegrees());
}
public void Test_GetPerimeter_Empty()
{
Assert.Equal(S1Angle.Zero, S2ShapeIndexMeasures.GetPerimeter(MakeIndexOrDie("# #")));
}
public void Test_GetLength_TwoLines()
{
Assert.Equal(S1Angle.FromDegrees(2), S2ShapeIndexMeasures.GetLength(MakeIndexOrDie(
"4:4 # 0:0, 1:0 | 1:0, 2:0 # 5:5, 5:6, 6:5")));
}
public void Test_GetLength_Empty()
{
Assert.Equal(S1Angle.Zero, S2ShapeIndexMeasures.GetLength(MakeIndexOrDie("# #")));
}
public void Test_GetNumPoints_LineAndPolygon()
{
Assert.Equal(0, S2ShapeIndexMeasures.GetNumPoints(MakeIndexOrDie(
"# 1:1, 1:2 # 0:3, 0:5, 2:5")));
}
public void Test_GetNumPoints_TwoPoints()
{
Assert.Equal(2, S2ShapeIndexMeasures.GetNumPoints(MakeIndexOrDie("0:0 | 1:0 # #")));
}
public void Test_GetNumPoints_Empty()
{
Assert.Equal(0, S2ShapeIndexMeasures.GetNumPoints(MakeIndexOrDie("# #")));
}
public void Test_GetApproxArea_TwoFullPolygons()
{
Assert.Equal(8 * Math.PI, S2ShapeIndexMeasures.GetApproxArea(MakeIndexOrDie("# # full | full")));
}
public void Test_GetLength_NoPolylines()
{
Assert.Equal(S1Angle.Zero, S2ShapeIndexMeasures.GetLength(MakeIndexOrDie("")));
}
public void Test_GetCentroid_Empty()
{
Assert.Equal(S2Point.Empty, S2ShapeIndexMeasures.GetCentroid(MakeIndexOrDie("# #")));
}
public void Test_GetDimension_Empty()
{
Assert.Equal(-1, S2ShapeIndexMeasures.GetDimension(MakeIndexOrDie("# #")));
}
public void Test_GetCentroid_Points()
{
Assert.Equal(new S2Point(1, 1, 0),
S2ShapeIndexMeasures.GetCentroid(MakeIndexOrDie("0:0 | 0:90 # #")));
}
