Exemple #1
0
        public void GetLength()
        {
            Path2F empty = new Path2F();
              empty.Sort();
              Assert.AreEqual(0, empty.GetLength(0, 1, 100, 0.0001f));

              Path2F path = CreatePath();
              path.PreLoop = CurveLoopType.Constant;
              path.PostLoop = CurveLoopType.Oscillate;
              Assert.IsTrue(Numeric.AreEqual((new Vector2F(0, 1) - new Vector2F(1, 2)).Length, path.GetLength(-1, 12, 100, 0.0001f), 0.001f));
              Assert.IsTrue(Numeric.AreEqual((new Vector2F(0, 1) - new Vector2F(1, 2)).Length, path.GetLength(-1, 20, 100, 0.0001f), 0.001f));

              CatmullRomSegment2F catmullOscillate = new CatmullRomSegment2F()
              {
            Point1 = new Vector2F(10, 12),
            Point2 = new Vector2F(10, 14),
            Point3 = new Vector2F(20, 14),
            Point4 = new Vector2F(30, 14),
              };
              float desiredLength = catmullOscillate.GetLength(0, 1, 20, 0.0001f);
              float actualLength = path.GetLength(40, 50, 20, 0.0001f);
              Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.001f));
              desiredLength = catmullOscillate.GetLength(1, 0.8f, 20, 0.0001f);
              actualLength = path.GetLength(52, 50, 20, 0.0001f);
              Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.001f));
              desiredLength = catmullOscillate.GetLength(1, 0.8f, 20, 0.0001f) * 2;
              actualLength = path.GetLength(52, 48, 20, 0.0001f);
              Assert.IsTrue(Numeric.AreEqual(desiredLength, actualLength, 0.001f));

              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;
        }
Exemple #2
0
        public void TwoKeyCurvesTest()
        {
            Path2F curve = new Path2F();
              curve.Add(new PathKey2F()
                  {
                    Parameter = 1,
                    Point = new Vector2F(1, 2),
                    Interpolation = SplineInterpolation.CatmullRom,
                  });
              curve.Add(new PathKey2F()
                  {
                    Parameter = 3,
                    Point = new Vector2F(3, 4),
                    Interpolation = SplineInterpolation.CatmullRom,
                  });
              curve.PreLoop = CurveLoopType.Constant;
              curve.PostLoop = CurveLoopType.Constant;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(2, 3), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(3, 4), curve.GetPoint(3));
              Assert.AreEqual(new Vector2F(3, 4), curve.GetPoint(4));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(1, 1), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(1, 1), curve.GetTangent(2));
              Assert.AreEqual(new Vector2F(1, 1), curve.GetTangent(3));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(4));
              Assert.IsTrue(Numeric.AreEqual(new Vector2F(2, 2).Length, curve.GetLength(0, 4, 10, 0.01f), 0.01f));

              curve.PreLoop = CurveLoopType.Linear;
              curve.PostLoop = CurveLoopType.Linear;
              curve.PreLoop = CurveLoopType.Cycle;
              curve.PostLoop = CurveLoopType.Cycle;
              curve.PreLoop = CurveLoopType.CycleOffset;
              curve.PostLoop = CurveLoopType.CycleOffset;
              curve.PreLoop = CurveLoopType.Oscillate;
              curve.PostLoop = CurveLoopType.Oscillate;
        }
Exemple #3
0
        public void OneKeyCurvesTest()
        {
            // Test linear curves with 1 point
              Path2F curve = new Path2F();
              curve.Add(new PathKey2F()
              {
            Parameter = 1,
            Point = new Vector2F(1, 2),
            Interpolation = SplineInterpolation.Linear,
              });
              curve.PreLoop = CurveLoopType.Constant;
              curve.PostLoop = CurveLoopType.Constant;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Linear;
              curve.PostLoop = CurveLoopType.Linear;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Cycle;
              curve.PostLoop = CurveLoopType.Cycle;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.CycleOffset;
              curve.PostLoop = CurveLoopType.CycleOffset;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Oscillate;
              curve.PostLoop = CurveLoopType.Oscillate;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));

              // Test step curves with 1 point
              curve = new Path2F();
              curve.Add(new PathKey2F()
              {
            Parameter = 1,
            Point = new Vector2F(1, 2),
            Interpolation = SplineInterpolation.StepLeft,
              });
              curve.PreLoop = CurveLoopType.Constant;
              curve.PostLoop = CurveLoopType.Constant;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Linear;
              curve.PostLoop = CurveLoopType.Linear;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Cycle;
              curve.PostLoop = CurveLoopType.Cycle;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.CycleOffset;
              curve.PostLoop = CurveLoopType.CycleOffset;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Oscillate;
              curve.PostLoop = CurveLoopType.Oscillate;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));

              // Test B-spline curves with 1 point
              curve = new Path2F();
              curve.Add(new PathKey2F()
              {
            Parameter = 1,
            Point = new Vector2F(1, 2),
            Interpolation = SplineInterpolation.BSpline,
              });
              curve.PreLoop = CurveLoopType.Constant;
              curve.PostLoop = CurveLoopType.Constant;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Linear;
              curve.PostLoop = CurveLoopType.Linear;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Cycle;
              curve.PostLoop = CurveLoopType.Cycle;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.CycleOffset;
              curve.PostLoop = CurveLoopType.CycleOffset;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Oscillate;
              curve.PostLoop = CurveLoopType.Oscillate;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));

              // Test Catmull-Rom curves with 1 point
              curve = new Path2F();
              curve.Add(new PathKey2F()
              {
            Parameter = 1,
            Point = new Vector2F(1, 2),
            Interpolation = SplineInterpolation.CatmullRom,
              });
              curve.PreLoop = CurveLoopType.Constant;
              curve.PostLoop = CurveLoopType.Constant;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Linear;
              curve.PostLoop = CurveLoopType.Linear;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Cycle;
              curve.PostLoop = CurveLoopType.Cycle;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.CycleOffset;
              curve.PostLoop = CurveLoopType.CycleOffset;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Oscillate;
              curve.PostLoop = CurveLoopType.Oscillate;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));

              // Test Hermite curves with 1 point
              curve = new Path2F();
              curve.Add(new PathKey2F()
              {
            Parameter = 1,
            Point = new Vector2F(1, 2),
            Interpolation = SplineInterpolation.Hermite,
            TangentIn = new Vector2F(2, -2),
            TangentOut = new Vector2F(2, 2),
              });
              curve.PreLoop = CurveLoopType.Constant;
              curve.PostLoop = CurveLoopType.Constant;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 20, 0.01f));
              curve.PreLoop = CurveLoopType.Constant;
              curve.PostLoop = CurveLoopType.Linear;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(3, 4), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(2, 2), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(2, 2), curve.GetTangent(2));
              Assert.IsTrue(Numeric.AreEqual(new Vector2F(2, 2).Length, curve.GetLength(0, 2, 10, 0.01f), 0.1f));
              curve.PreLoop = CurveLoopType.Linear;
              curve.PostLoop = CurveLoopType.Constant;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(-1, 4), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(2, -2), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(2, -2), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.IsTrue(Numeric.AreEqual(new Vector2F(2, 2).Length, curve.GetLength(0, 2, 10, 0.01f), 0.1f));
              curve.PreLoop = CurveLoopType.Linear;
              curve.PostLoop = CurveLoopType.Linear;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(-1, 4), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(3, 4), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(2, -2), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(2, 2), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(2, 2), curve.GetTangent(2));
              Assert.IsTrue(Numeric.AreEqual(new Vector2F(4, 4).Length, curve.GetLength(0, 2, 10, 0.01f), 0.1f));
              curve.PreLoop = CurveLoopType.Cycle;
              curve.PostLoop = CurveLoopType.Cycle;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.CycleOffset;
              curve.PostLoop = CurveLoopType.CycleOffset;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Oscillate;
              curve.PostLoop = CurveLoopType.Oscillate;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));

              // Test Bezier curves with 1 point
              curve = new Path2F();
              curve.Add(new PathKey2F()
              {
            Parameter = 1,
            Point = new Vector2F(1, 2),
            Interpolation = SplineInterpolation.Bezier,
            TangentIn = new Vector2F(1, 2) - new Vector2F(2, -2) / 3,
            TangentOut = new Vector2F(1, 2) + new Vector2F(2, 2) / 3,
              });
              curve.PreLoop = CurveLoopType.Constant;
              curve.PostLoop = CurveLoopType.Constant;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Constant;
              curve.PostLoop = CurveLoopType.Linear;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.IsTrue(Vector2F.AreNumericallyEqual(new Vector2F(3, 4), curve.GetPoint(2)));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.IsTrue(Vector2F.AreNumericallyEqual(new Vector2F(2, 2), curve.GetTangent(1)));
              Assert.IsTrue(Vector2F.AreNumericallyEqual(new Vector2F(2, 2), curve.GetTangent(2)));
              Assert.IsTrue(Numeric.AreEqual(new Vector2F(2, 2).Length, curve.GetLength(0, 2, 10, 0.01f), 0.1f));
              curve.PreLoop = CurveLoopType.Linear;
              curve.PostLoop = CurveLoopType.Constant;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(-1, 4), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.IsTrue(Vector2F.AreNumericallyEqual(new Vector2F(2, -2), curve.GetTangent(0)));
              Assert.IsTrue(Vector2F.AreNumericallyEqual(new Vector2F(2, -2), curve.GetTangent(1)));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.IsTrue(Numeric.AreEqual(new Vector2F(2, 2).Length, curve.GetLength(0, 2, 10, 0.01f), 0.1f));
              curve.PreLoop = CurveLoopType.Linear;
              curve.PostLoop = CurveLoopType.Linear;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(-1, 4), curve.GetPoint(0));
              Assert.IsTrue(Vector2F.AreNumericallyEqual(new Vector2F(3, 4), curve.GetPoint(2)));
              Assert.IsTrue(Vector2F.AreNumericallyEqual(new Vector2F(2, -2), curve.GetTangent(0)));
              Assert.IsTrue(Vector2F.AreNumericallyEqual(new Vector2F(2, 2), curve.GetTangent(1)));
              Assert.IsTrue(Vector2F.AreNumericallyEqual(new Vector2F(2, 2), curve.GetTangent(2)));
              Assert.IsTrue(Numeric.AreEqual(new Vector2F(4, 4).Length, curve.GetLength(0, 2, 10, 0.01f), 0.1f));
              curve.PreLoop = CurveLoopType.Cycle;
              curve.PostLoop = CurveLoopType.Cycle;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.CycleOffset;
              curve.PostLoop = CurveLoopType.CycleOffset;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
              curve.PreLoop = CurveLoopType.Oscillate;
              curve.PostLoop = CurveLoopType.Oscillate;
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(1));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(0));
              Assert.AreEqual(new Vector2F(1, 2), curve.GetPoint(2));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(0));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(1));
              Assert.AreEqual(new Vector2F(0, 0), curve.GetTangent(2));
              Assert.AreEqual(0, curve.GetLength(0, 2, 10, 0.01f));
        }