Ellipse2d Methods
The following tables list the members exposed by the Ellipse2d type.
| Name | Description | |
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AngleToParam(double) | Computes an elliptical parameter given an angle in radians. |
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ArcFit(double) | |
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ArcFit(int) | |
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ClosestPoint(Point2d) | Computes a point on the ellipse/elliptical arc that is as close as possible to another point. |
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CommonTangents(Ellipse2d) | |
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ComputeLength(double) | Usually, the Length property of the ellipse should be used. This function can be used in case a custom accuracy is wanted. |
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Contains(Point2d) | |
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CreateFrom5Points(Point2d, Point2d, Point2d, Point2d, Point2d) | Creates an ellipse through five points |
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CreateFromEquation(double, double, double, double, double, double) | Creates an ellipse from the general conic equation Ax^2+Bxy+Cy^2+Dx+Ey+F=0 |
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CreateFromLength(Point2d, double, double, double, double, double) | Approximates a new elliptical arc given a startangle and a length. If the length is larger than a full ellipse of the specified parameters, an exception will be thrown (numerical computations will never converge). |
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Distance(Point2d) | Computes a distance from any point to the ellipse/elliptical arc. |
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DualConic(Ellipse2d) | |
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Eval(double) | Evaluates a point on the ellipse given a parameter. The parametric range for an ellipse is 0-2*PI. For an elliptical arc the start an end of the range corresponds to where it resides on the full ellipses circumference. |
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Flatten(double) | |
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Foci(bool) | Computes one of the two focii of the ellipse. |
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GetEquation() | |
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GetEquation(out double, out double, out double, out double, out double, out double) | Gets the conic equation of the ellipse on the form Ax^2+Bxy+Cy^2+Dx+Ey+F=0 |
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IsArc() | Returns true if this is an elliptical arc, or false if this is a complete ellipse. |
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IsEllipsePointOnArc(Point2d) | Checks if a point included in the full ellipse is on the elliptical arc by checking it's side of the startpoint-endpoint line. If this ellipse is a full ellipse this function always returns true. |
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IsParamIncluded(double) | Checks if an elliptical parameter is included on the arc. If this is a full ellipse this function always returns true. |
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Mirror(Point2d, Point2d) | Mirrors the ellipse in-place over a line specified by two points. |
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Normalize() | Makes sure the ellipse major axis is longer than the minor axis, and fixes the parameters as needed |
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Param(Point2d) | Calculates the parameter of the point pt in the range 0-2PI. |
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Param01(double) | Converts a parameter in the range 0-2PI to a parameter in the range 0-1 where 0=startparam and 1=endparam on arc |
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ParamToAngle(double) | Computes an angle in radians given an elliptical parameter for this ellipse. |
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Perpendicular(Point2d) | Computes new points on the ellipses periferi, which are perpendicular to the ellipse with respect to a given point. The points are on the full ellipse, even if it is an arc. |
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Quadrant(int) | Returns a new point on the ellipse that is a point on one of the ellipses extremes in the ellipse local coordinate system. The point is always computed as if the ellipse is a full ellipse and not an arc. |
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Rotate(double) | Rotates the ellipse in-place around world origo. |
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Rotate(double, Point2d) | Rotates the ellipse in-place around a given point. |
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Scale(double) | Scales the ellipse in-place using world origo as scaling center. |
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Scale(double, Point2d) | Scales the ellipse in-place using a specified scaling center. |
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Split(IEnumerable<Double>) | Splits the arc in sub-arcs given a list of elliptical parameters. The list of parameters do _not_ need to be sorted. |
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Split(params double[]) | Splits the arc in sub-arcs given a list of elliptical parameters. The list of parameters do _not_ need to be sorted. |
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Split(double, out Ellipse2d, out Ellipse2d) | Splits the arc at a specified elliptical parameter. If the parmeter is out of arcs range, a copy of this object and a zero length arc will be created. |
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Tangent(Point2d) | Computes the tangent angle at a given point on the ellipse. |
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TangentPoint(Point2d, Side) | Computes a point on the ellipses circumference that is the enpoint of a line that tangents the ellipse. |
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ToConic() | |
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ToRegion(double) | Approximates the ellipse in a region representation. Since an ellipse cannot be exactly represented by a region, a tolerance is used to approximate the ellipse into a polygon with linear segments only. |
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ToString() | Creates a new string suitable for debugging purposes. |
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Transform(Matrix2d) | Transforms the ellipse in-place with a matrix. Note that the result is undefined for matrices with non uniform scale. |
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Translate(double, double) | Translates the ellipse in-place using a given delta x and delta y. |
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WriteAutoCADScript(StreamWriter, int) | Writes text data to a stream that is suitable to load into AutoCAD using the script command. |