public void EvaluateTest()
{
// Arrange
MAT3 a = new MAT3(
new VEC3[3]
{
new VEC3(3, 2, 1),
new VEC3(4, 5, 6),
new VEC3(7, 5, 9)
});
VEC3 v = new VEC3(1, 2, 7);
double expected_x = a[0][0] * v[0] + a[0][1] * v[1] + a[0][2] * v[2];
double expected_y = a[1][0] * v[0] + a[1][1] * v[1] + a[1][2] * v[2];
double expected_z = a[2][0] * v[0] + a[2][1] * v[1] + a[2][2] * v[2];
// Act
VEC3 r = MAT3.Evaluate(in a, in v);
double actual_x = r[0];
double actual_y = r[1];
double actual_z = r[2];
// Assert
Assert.AreEqual(expected_x, actual_x, double.Epsilon);
Assert.AreEqual(expected_y, actual_y, double.Epsilon);
Assert.AreEqual(expected_z, actual_z, double.Epsilon);
}
public void LengthTest()
{
// Arrange
double x = 3.0, y = 4.0, z = 5.0;
VEC3 v = new VEC3(x, y, z);
double expected = Math.Sqrt((x * x) + (y * y) + (z * z));
// Act
double actual = v.Length;
// Assert
Assert.AreEqual(expected, actual, double.Epsilon);
}
public void DotTest()
{
// Arrange
double ax = 2.0, ay = 3.0, az = 4.0;
VEC3 a = new VEC3(ax, ay, az);
double bx = 5.0, by = 6.0, bz = 7.0;
VEC3 b = new VEC3(bx, by, bz);
double expected = (ax * bx) + (ay * by) + (az * bz);
// Act
double actual = VEC3.Dot(a, b);
// Assert
Assert.AreEqual(expected, actual);
}
public void DistanceTest()
{
// Arrange
double ax = 2.0, ay = 3.0, az = 4.0;
VEC3 a = new VEC3(ax, ay, az);
double bx = 5.0, by = 6.0, bz = 7.0;
VEC3 b = new VEC3(bx, by, bz);
VEC3 d = a - b;
double expected = Math.Sqrt((d[0] * d[0]) + (d[1] * d[1]) + (d[2] * d[2]));
// Act
double actual = VEC3.Distance(a, b);
// Assert
Assert.AreEqual(expected, actual, double.Epsilon);
}
public void InitTest()
{
// Arrange
double expected_x = 1.0;
double expected_y = 2.0;
double expected_z = 3.0;
// Act
VEC3 v = new VEC3(expected_x, expected_y, expected_z);
double actual_x = v[0];
double actual_y = v[1];
double actual_z = v[2];
// Assert
Assert.AreEqual(expected_x, actual_x);
Assert.AreEqual(expected_y, actual_y);
Assert.AreEqual(expected_z, actual_z);
}
public void SolveTest()
{
// Arrange
MAT3 a = new MAT3(
new VEC3[3]
{
new VEC3(3, 2, 1),
new VEC3(4, 5, 6),
new VEC3(7, 5, 9)
});
VEC3 b = new VEC3(1, 2, 7);
// Act
bool solved = MAT3.Solve(in a, in b, out VEC3 _);
// Assert
Assert.IsTrue(solved);
}
public void MinusTest()
{
// Arrange
double ax = 10.0, ay = 9.0, az = 8.0;
VEC3 a = new VEC3(ax, ay, az);
double bx = 9.0, by = 7.0, bz = 5.0;
VEC3 b = new VEC3(bx, by, bz);
double expected_x = ax - bx,
expected_y = ay - by,
expected_z = az - bz;
// Act
VEC3 actual = a - b;
double actual_x = actual[0];
double actual_y = actual[1];
double actual_z = actual[2];
// Assert
Assert.AreEqual(expected_x, actual_x);
Assert.AreEqual(expected_y, actual_y);
Assert.AreEqual(expected_z, actual_z);
}
public void CrossTest()
{
// Arrange
double ax = 2.0, ay = 3.0, az = 4.0;
VEC3 a = new VEC3(ax, ay, az);
double bx = 5.0, by = 6.0, bz = 7.0;
VEC3 b = new VEC3(bx, by, bz);
double expected_x = (ay * bz) - (az * by),
expected_y = (az * bx) - (ax * bz),
expected_z = (ax * by) - (ay * bx);
// Act
VEC3 actual = VEC3.Cross(a, b);
double actual_x = actual[0];
double actual_y = actual[1];
double actual_z = actual[2];
// Assert
Assert.AreEqual(expected_x, actual_x);
Assert.AreEqual(expected_y, actual_y);
Assert.AreEqual(expected_z, actual_z);
}
public static Vector3 Vec3ToUnityVector3(VEC3 v)
{
return(new Vector3(v.X, v.Y, v.Z));
}
private static extern void VEC3minus_Internal(
ref VEC3 r,
in VEC3 a,
internal static void VEC3init(ref VEC3 v, double x, double y, double z)
{
VEC3init_Internal(ref v, x, y, z);
}
private static extern void VEC3init_Internal(
ref VEC3 v,
[MarshalAs(UnmanagedType.R8)] double x,
[MarshalAs(UnmanagedType.R8)] double y,
[MarshalAs(UnmanagedType.R8)] double z);
