public Ellipse(EntityObject entity)
: base(EdgeType.Ellipse)
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
Entities.Ellipse ellipse = entity as Entities.Ellipse;
if (ellipse == null)
{
throw new ArgumentException("The entity is not an Ellipse", nameof(entity));
}
this.Center = new Vector2(ellipse.Center.X, ellipse.Center.Y);
double sine = 0.5 * ellipse.MajorAxis * Math.Sin(ellipse.Rotation * MathHelper.DegToRad);
double cosine = 0.5 * ellipse.MajorAxis * Math.Cos(ellipse.Rotation * MathHelper.DegToRad);
this.EndMajorAxis = new Vector2(cosine, sine);
this.MinorRatio = ellipse.MinorAxis / ellipse.MajorAxis;
if (ellipse.IsFullEllipse)
{
this.StartAngle = 0.0;
this.EndAngle = 360.0;
}
else
{
this.StartAngle = ellipse.StartAngle;
this.EndAngle = ellipse.EndAngle;
}
this.IsCounterclockwise = true;
}
/// <summary>
/// Initializes a new instance of the the <c>HatchBoundaryPath.Ellipse</c> class.
/// </summary>
/// <param name="entity"><see cref="EntityObject">Entity</see> that represents the edge.</param>
public Ellipse(EntityObject entity)
: base(EdgeType.Ellipse)
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
Entities.Ellipse ellipse = entity as Entities.Ellipse;
if (ellipse == null)
{
throw new ArgumentException("The entity is not an Ellipse", nameof(entity));
}
Matrix3 trans = MathHelper.ArbitraryAxis(entity.Normal).Transpose();
Vector3 point = trans * ellipse.Center;
Center = new Vector2(point.X, point.Y);
double sine = 0.5 * ellipse.MajorAxis * Math.Sin(ellipse.Rotation * MathHelper.DegToRad);
double cosine = 0.5 * ellipse.MajorAxis * Math.Cos(ellipse.Rotation * MathHelper.DegToRad);
EndMajorAxis = new Vector2(cosine, sine);
MinorRatio = ellipse.MinorAxis / ellipse.MajorAxis;
if (ellipse.IsFullEllipse)
{
StartAngle = 0.0;
EndAngle = 360.0;
}
else
{
StartAngle = ellipse.StartAngle;
EndAngle = ellipse.EndAngle;
}
IsCounterclockwise = true;
}
