[TestCase(4, 3, 3, 2, 1, 2, 45)] // obtuse deg rotated
public static void CreateFromPoints_Creates_Angular_Offset_Formed_by_3_Points(
double x1, double y1,
double x2, double y2,
double x3, double y3,
double expectedAngleDegrees)
{
CartesianCoordinate point1 = new CartesianCoordinate(x1, y1);
CartesianCoordinate point2 = new CartesianCoordinate(x2, y2);
CartesianCoordinate point3 = new CartesianCoordinate(x3, y3);
AngularOffset offset = AngularOffset.CreateFromPoints(point1, point2, point3);
Assert.AreEqual(expectedAngleDegrees, offset.ToAngle().Degrees, Tolerance);
}
/// <summary>
/// Initializes a new instance of the <see cref="Transformations"/> class.
/// </summary>
/// <param name="localOriginInGlobal">The local origin in global coordinates.</param>
/// <param name="localAxisXPtInGlobal">Any point along the local x-axis in global coordinates.</param>
public Transformations(CartesianCoordinate localOriginInGlobal, CartesianCoordinate localAxisXPtInGlobal)
{
LocalOrigin = localOriginInGlobal;
LocalAxisX = localAxisXPtInGlobal;
Displacement = localOriginInGlobal.OffsetFrom(CartesianCoordinate.Origin());
if (localAxisXPtInGlobal.Y == localOriginInGlobal.Y)
{
Rotation = new AngularOffset();
}
else
{
Rotation = AngularOffset.CreateFromPoints(
localAxisXPtInGlobal,
localOriginInGlobal,
new CartesianCoordinate(localOriginInGlobal.X - 1, localOriginInGlobal.Y)
);
}
}