public Segment2D(Point2D basePoint, Direction2D direction, Distance length)
{
if (length == ZeroDistance)
{
throw new Exception("Segment length must be greater than zero.");
}
BasePoint = basePoint;
EndPoint = basePoint + direction.ToVector(length);
Length = length.AbsoluteValue();
}
public static Direction2D?To2D(this Direction direction)
{
if (Math.Abs(direction.Z) > ZeroDotProductTolerance)
{
throw new Exception("Expected direction to be zero in the z coordinate.");
}
if (direction.HasDirection())
{
return(Direction2D.Create(direction.X, direction.Y));
}
return(null);
}
public Segment2D(Direction2D direction, Distance magnitude) : this(Point2D.Origin, direction, magnitude)
{
}
public static Direction To3D(this Direction2D direction) => new Direction(direction.X, direction.Y);
public static DecomposedAngle AngleFromPositiveX(this Direction2D imageOfPositiveX) => new DecomposedAngle(imageOfPositiveX);
/// <summary> /// Get the <see cref="DecomposedAngle" /> needed to rotate the first <see cref="Direction2D" /> onto the /// second. /// </summary> public static DecomposedAngle CounterclockwiseAngleTo(this Direction2D preimage, Direction2D image) => new DecomposedAngle(preimage.DotProduct(image), preimage.RotateQuarterTurn().DotProduct(image));
public DecomposedAngle Negate() => new DecomposedAngle(Direction2D.UnsafeCreateFromNormalized(CosineOfAngle, -SineOfAngle));
/// <summary> /// Construct the angle from the positive x-axis to the specified point. /// </summary> public static DecomposedAngle?FromPositiveX(Distance x, Distance y) => Direction2D.Create(x, y)?.AngleFromPositiveX();
/// <summary>
/// Construct the counterclockwise angle from the positive x-axis to the specified point, or throw an
/// <see cref="Exception"/> if the point is too close to the origin.
/// </summary>
public DecomposedAngle(double x, double y)
: this(Direction2D.Create(x, y))
{
}
public DecomposedAngle(Direction2D imageOfPositiveXAxis)
{
ImageOfPositiveXAxis = imageOfPositiveXAxis;
}