public void GetParameterByLength()
{
Path2F empty = new Path2F();
empty.ParameterizeByLength(20, 0.001f); // No exception, do nothing.
Assert.IsTrue(float.IsNaN(empty.GetParameterFromLength(10, 20, 0.1f)));
Path2F path = CreatePath();
path.ParameterizeByLength(20, 0.001f);
Assert.AreEqual(0, path.GetParameterFromLength(0, 20, 0.001f));
Assert.AreEqual(path[2].Parameter, path.GetParameterFromLength(path[2].Parameter, 20, 0.01f));
Assert.AreEqual(path[4].Parameter, path.GetParameterFromLength(path[4].Parameter, 20, 0.01f));
Assert.AreEqual(path[5].Parameter, path.GetParameterFromLength(path[5].Parameter, 20, 0.01f));
Assert.AreEqual(path[6].Parameter, path.GetParameterFromLength(path[6].Parameter, 20, 0.01f));
Assert.AreEqual(path[7].Parameter, path.GetParameterFromLength(path[7].Parameter, 20, 0.01f));
Assert.AreEqual(path[8].Parameter, path.GetParameterFromLength(path[8].Parameter, 20, 0.01f));
Assert.AreEqual(path[9].Parameter, path.GetParameterFromLength(path[9].Parameter, 20, 0.01f));
float pathLength = path[9].Parameter;
float desiredLength = 11;
float actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.01f), 20, 0.01f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.01f));
desiredLength = 20;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.01f));
desiredLength = 26f;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.01f));
path.PreLoop = CurveLoopType.Linear;
path.PostLoop = CurveLoopType.Linear;
desiredLength = 60;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = -10f;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.01f));
path.PreLoop = CurveLoopType.CycleOffset;
path.PostLoop = CurveLoopType.CycleOffset;
path.ParameterizeByLength(20, 0.001f);
desiredLength = -90;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = -50;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = -30;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 50;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 100;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 130;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 200;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
path.PreLoop = CurveLoopType.Oscillate;
path.PostLoop = CurveLoopType.Cycle;
path.ParameterizeByLength(20, 0.001f);
desiredLength = -66;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = -30;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = -20;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 40;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 70;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 100;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 190;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
path.PreLoop = CurveLoopType.Cycle;
path.PostLoop = CurveLoopType.Oscillate;
path.ParameterizeByLength(20, 0.001f);
desiredLength = -90;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = -50;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = -30;
actualLength = -path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 50;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 110;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 130;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
desiredLength = 210;
actualLength = path.GetLength(0, path.GetParameterFromLength(desiredLength, 20, 0.001f), 20, 0.001f);
Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.1f));
// Test path with zero length.
path = new Path2F();
path.Add(new PathKey2F()
{
Parameter = 10,
Point = new Vector2F(0, 1),
Interpolation = SplineInterpolation.Linear,
TangentIn = new Vector2F(1, 0),
TangentOut = new Vector2F(1, 0),
});
path.ParameterizeByLength(20, 0.001f);
Assert.AreEqual(0, path.GetParameterFromLength(0, 20, 0.1f));
path.Add(new PathKey2F()
{
Parameter = 20,
Point = new Vector2F(0, 1),
Interpolation = SplineInterpolation.Linear,
TangentIn = new Vector2F(1, 0),
TangentOut = new Vector2F(1, 0),
});
path.ParameterizeByLength(20, 0.001f);
Assert.AreEqual(0, path.GetParameterFromLength(0, 20, 0.1f));
}
public void ParameterizeByLength()
{
Path2F empty = new Path2F();
empty.Sort();
empty.ParameterizeByLength(20, 0.001f); // No exception, do nothing.
Path2F path = CreatePath();
Path2F lengthPath = CreatePath();
lengthPath.ParameterizeByLength(20, 0.001f);
float length = (lengthPath[1].Point - lengthPath[0].Point).Length;
Assert.AreEqual(0, lengthPath[0].Parameter);
Assert.AreEqual(length, lengthPath[1].Parameter);
Assert.AreEqual(length, lengthPath[2].Parameter);
Assert.AreEqual(length, lengthPath[3].Parameter);
float step = 0.001f;
int i = 4;
float u = 20;
Vector2F oldPoint = path.GetPoint(u);
for (; u < 51 && i<10; u += step)
{
if (Numeric.AreEqual(u, path[i].Parameter))
{
Assert.IsTrue(Numeric.AreEqual(length, lengthPath[i].Parameter, 0.01f));
// Set explicit values against numerical problems.
length = lengthPath[i].Parameter;
u = path[i].Parameter;
oldPoint = path.GetPoint(u);
i++;
}
Vector2F newPoint = path.GetPoint(u + step);
length += (newPoint - oldPoint).Length;
oldPoint = newPoint;
}
Assert.AreEqual(10, i); // Have we checked all keys?
path.PreLoop = CurveLoopType.Constant;
path.PostLoop = CurveLoopType.Oscillate;
path.PreLoop = CurveLoopType.Linear;
path.PostLoop = CurveLoopType.Cycle;
path.PreLoop = CurveLoopType.Cycle;
path.PostLoop = CurveLoopType.CycleOffset;
path.PreLoop = CurveLoopType.CycleOffset;
path.PostLoop = CurveLoopType.Linear;
path.PreLoop = CurveLoopType.Oscillate;
path.PostLoop = CurveLoopType.Constant;
}