CircleF

References
public struct CircleF : IComparable<CircleF>, IEquatable<CircleF>
Adds a Circle type to the Eto.Drawing namespace.

Constructors

CircleF

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public CircleF(float centreX, float centreY, float radius)
Create a new Circle.
Parameters:
centreX (float)Centre point x.
centreY (float)Centre point y.
radius (float)Radius.

CircleF

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public CircleF(PointF centre, float radius)
Create a new Circle.
Parameters:
centre (PointF)Centre point.
radius (float)Radius.

Properties

Area

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public float Area { get; }
Gets the area of this circle. If the radius is negative, so will the area be.

Bounds

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public RectangleF Bounds { get; }
Gets the bounds of this circle.

Centre

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public PointF Centre { get; set; }
Gets or sets the centre point of the circle.

Circumference

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public float Circumference { get; }
Gets the circumference of this circle. Circles with negative radii will have negative circumferences.

Empty

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public static CircleF Empty { get; }
Returns an empty circle.

Equation

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public CircleEquation Equation { get; }
Gets the equation for the current circle.

IsEmpty

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public bool IsEmpty { get; }
Gets whether this circle is empty, ie. has a radius of exactly zero.

IsUnset

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public bool IsUnset { get; }
Gets whether this circle is unset, ie. whether any of its values are NaNs.

Radius

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public float Radius { get; set; }
Gets or sets the radius of the circle.

Unset

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public static CircleF Unset { get; }
Returns an unset circle.

Methods

CircumscribedCircle

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public static CircleF CircumscribedCircle(RectangleF rectangle)
Gets the smallest circle which entirely contains the rectangle.
Parameters:
rectangle (RectangleF)Rectangle to contain.
Returns: Circle.

ClosestPointOnDisc

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[Pure] public PointF ClosestPointOnDisc(PointF point)
Gets the point on the circle disc closest to a locus point.
Parameters:
point (PointF)Locus point.
Returns: Point on circle disc.

ClosestPointOnEdge

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[Pure] public PointF ClosestPointOnEdge(PointF point)
Gets the point on the circle boundary closest to a locus point.
Parameters:
point (PointF)Locus point.
Returns: Point on circle edge.

CompareTo

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public int CompareTo(CircleF other)
Compare this circle to another.
Parameters:
other (CircleF)Circle to compare to.
Returns: Sort order.

Contains

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[Pure] public bool Contains(PointF point)
Test whether this circle contains a point.
Parameters:
point (PointF)Point to test.
Returns: True if the point is on or in this circle.

DistanceToDisc

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[Pure] public float DistanceToDisc(PointF point)
Gets the distance from a point to the boundary of the circle.
Parameters:
point (PointF)Point to measure.
Returns: Distance from circle edge to point.

DistanceToEdge

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[Pure] public float DistanceToEdge(PointF point)
Gets the distance from a point to the boundary of the circle.
Parameters:
point (PointF)Point to measure.
Returns: Distance from circle edge to point.

Divide

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[Pure] public PointF[] Divide(double deviation)
Divide the circle into segments.
Parameters:
deviation (double)Maximum deviation between circle and polygon.
Returns: Array of points. The first and last point are coincident.

Equals

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public bool Equals(CircleF other)
Compare one circle to another.
Parameters:
other (CircleF)Circle to compare to.
Returns: True if circles are equals.

InscribedCircle

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public static CircleF InscribedCircle(RectangleF rectangle)
Gets the biggest circle which exists entirely within the rectangle.
Parameters:
rectangle (RectangleF)Rectangle to fit into.
Returns: Circle.

Offset

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[Pure] public CircleF Offset(float amount)
Modify a circle by offsetting it.
Parameters:
amount (float)Amount to offset.
Returns: Offsetted circle.

PointAt

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[Pure] public PointF PointAt(float angle)
Gets the point on the circle at the given angle.
Parameters:
angle (float)Angle in degrees, clockwise starting from positive x.
Returns: Point on circle.

PointIn

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[Pure] public PointF PointIn(float angle, float radius)
Gets the point on the circle space at the given angle and offset.
Parameters:
angle (float)Angle in degrees, clockwise starting from positive x.
radius (float)Distance from circle centre in multiples of the radius.
Returns: Point in circular space.

Relation

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public static ShapeRelation Relation(CircleF a, CircleF b)
Solve the geometric relationship between two circles.
Parameters:
a (CircleF)First circle.
b (CircleF)Second circle.
Returns: Relationship.

Relation

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public static ShapeRelation Relation(CircleF a, RectangleF b)
Solve the geometric relationship between a circle and a rectangle.
Parameters:
a (CircleF)Circle.
b (RectangleF)Rectangle.
Returns: Relationship.

ThroughPoints

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public static CircleF ThroughPoints(PointF p0, PointF p1, PointF p2)
Fit a circle through three points.
Parameters:
p0 (PointF)First point.
p1 (PointF)Second point.
p2 (PointF)Third point.
Returns: Fitted circle.

ThroughPoints

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public static CircleF ThroughPoints(PointF p0, PointF p1)
Fit a circle through two points.
Parameters:
p0 (PointF)First point.
p1 (PointF)Second point.
Returns: Fitted circle.

ToString

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public override string ToString()
Gets a string representation of this circle.
Returns: Description.
Overrides: ValueType.ToString

Convertors

OperationResultDescription
implicitCircleFCircleDefines widening conversion from Eto.Circle to Rhino.Geometry.Circle.
implicitCircleCircleFDefines widening conversion from Rhino.Geometry.Circle to Eto.Circle.
implicitCircleFRectangleFDefines widening conversion to Bounding rectangle.