public void LineDistance2DSegmentTest()
{
double delta = 0.000000000000001;
// create the line to test.
PointF2D a = new PointF2D(0, 0);
PointF2D b = new PointF2D(1, 1);
LineF2D line = new LineF2D(a, b,true,true);
// calculate the results
double sqrt_2 = (double)System.Math.Sqrt(2);
double sqrt_2_div_2 = (double)System.Math.Sqrt(2) / 2.0f;
// the point to test to.
PointF2D c = new PointF2D(1, 0);
Assert.AreEqual(line.Distance(c), sqrt_2_div_2, delta, string.Format("Point distance should be {0}f!", sqrt_2_div_2));
// the point to test to.
c = new PointF2D(0, 1);
Assert.AreEqual(line.Distance(c), sqrt_2_div_2, delta, string.Format("Point distance should be {0}f!", sqrt_2_div_2));
// the point to test to.
c = new PointF2D(2, 2);
Assert.AreEqual(line.Distance(c), sqrt_2, delta);
// the point to test to.
c = new PointF2D(2, 3);
Assert.AreEqual(line.Distance(c), 2.23606797749979, delta, string.Format("Point distance should be {0}f!", sqrt_2_div_2));
// the point to test to.
c = new PointF2D(3, 2);
Assert.AreEqual(line.Distance(c), 2.23606797749979, delta, string.Format("Point distance should be {0}f!", sqrt_2_div_2));
// the point to test to.
c = new PointF2D(1, 0);
Assert.AreEqual(line.Distance(c), sqrt_2_div_2, delta, string.Format("Point distance should be {0}f!", sqrt_2_div_2));
// the point to test to.
c = new PointF2D(0, 1);
Assert.AreEqual(line.Distance(c), sqrt_2_div_2, delta, string.Format("Point distance should be {0}f!", sqrt_2_div_2));
// the point to test to.
c = new PointF2D(2, 2);
Assert.AreEqual(line.Distance(c), sqrt_2, delta, string.Format("Point distance should be {0}!", sqrt_2));
// the point to test to.
c = new PointF2D(2, 1);
Assert.AreEqual(line.Distance(c), 1, delta, string.Format("Point distance should be {0}f!", 1));
// the point to test to.
c = new PointF2D(1, 2);
Assert.AreEqual(line.Distance(c), 1, delta, string.Format("Point distance should be {0}f!", 1));
// the point to test to.
c = new PointF2D(-1, -1);
Assert.AreEqual(line.Distance(c), sqrt_2, delta, string.Format("Point distance should be {0}f!", 1));
// the point to test to.
c = new PointF2D(1, -1);
Assert.AreEqual(line.Distance(c), sqrt_2, delta, string.Format("Point distance should be {0}f!", 1));
}
public void Point2DTest()
{
// create the test cases.
PointF2D a = new PointF2D(0, 0);
PointF2D b = new PointF2D(1, 1);
// calculate the results
double sqrt_2 = (double)System.Math.Sqrt(2);
double sqrt_2_div_2 = (double)System.Math.Sqrt(2) / 2.0f;
// test distance.
Assert.AreEqual(a.Distance(b), sqrt_2, string.Format("Distance should be {0}!", sqrt_2));
// test substraction into vector.
VectorF2D ab = b - a;
Assert.AreEqual(ab[0], 1, "Vector should be 1 at index 0!");
Assert.AreEqual(ab[1], 1, "Vector should be 1 at index 1!");
VectorF2D ba = a - b;
Assert.AreEqual(ba[0], -1, "Vector should be -1 at index 0!");
Assert.AreEqual(ba[1], -1, "Vector should be -1 at index 1!");
}
/// <summary>
/// Calculates the distance between this point and the given point.
/// </summary>
/// <param name="p"></param>
/// <returns></returns>
public double Distance(PointF2D p)
{
return PointF2D.Distance(this, p);
}
public void LinePosition2DTest()
{
PointF2D a = new PointF2D(0, 0);
PointF2D b = new PointF2D(1, 1);
LineF2D line = new LineF2D(a, b);
// test where the position lie.
Assert.AreEqual(line.PositionOfPoint(new PointF2D(0, 0.5f)), LinePointPosition.Left, "Point position should be right!");
Assert.AreEqual(line.PositionOfPoint(new PointF2D(0.5f, 0.5f)), LinePointPosition.On, "Point position should be on!");
Assert.AreEqual(line.PositionOfPoint(new PointF2D(0.5f, 0)), LinePointPosition.Right, "Point position should be left!");
}
/// <summary>
/// Converts the given geo coordinates to projected two dimension versions on the target.
/// </summary>
/// <param name="target"></param>
/// <param name="points"></param>
/// <returns></returns>
public PointF2D[] ConvertToTargetCoordinates(
ITarget target,
GeoCoordinate[] points)
{
PointF2D[] target_points = new PointF2D[points.Length];
for (int idx = 0; idx < points.Length; idx++)
{
target_points[idx] = this.ConvertToTargetCoordinates(target, points[idx]);
}
return target_points;
}
