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Ellipse
=======
.. module:: ezdxf.entities
:noindex:
ELLIPSE (`DXF Reference`_) with center point at location :attr:`dxf.center` and a major axis :attr:`dxf.major_axis` as vector.
:attr:`dxf.ratio` is the ratio of minor axis to major axis. :attr:`dxf.start_param` and :attr:`dxf.end_param`
defines the starting- and the end point of the ellipse, a full ellipse goes from ``0`` to ``2*pi``.
The ellipse goes from starting- to end param in counter clockwise direction.
:attr:`dxf.extrusion` is supported, but does not establish an :ref:`OCS`, but creates an 3D entity by
extruding the base ellipse in direction of the :attr:`dxf.extrusion` vector.
======================== ==========================================
Subclass of :class:`ezdxf.entities.DXFGraphic`
DXF type ``'ELLIPSE'``
factory function :meth:`~ezdxf.layouts.BaseLayout.add_ellipse`
Inherited DXF attributes :ref:`Common graphical DXF attributes`
Required DXF version DXF R2000 (``'AC1015'``)
======================== ==========================================
.. class:: Ellipse
.. attribute:: dxf.center
Center point of circle (2D/3D Point in :ref:`WCS`)
.. attribute:: dxf.major_axis
Endpoint of major axis, relative to the :attr:`dxf.center` (Vec3), default value is ``(1, 0, 0)``.
.. attribute:: dxf.ratio
Ratio of minor axis to major axis (float), has to be in range from ``0.000001`` to ``1``,
default value is ``1``.
.. attribute:: dxf.start_param
Start parameter (float), default value is ``0``.
.. attribute:: dxf.end_param
End parameter (float), default value is ``2*pi``.
.. attribute:: start_point
Returns the start point of the ellipse in WCS.
.. attribute:: end_point
Returns the end point of the ellipse in WCS.
.. attribute:: minor_axis
Returns the minor axis of the ellipse as :class:`Vec3` in WCS.
.. automethod:: construction_tool
.. automethod:: apply_construction_tool
.. automethod:: vertices
.. automethod:: flattening
.. automethod:: params
.. automethod:: transform
.. automethod:: translate
.. automethod:: to_spline
.. automethod:: from_arc
.. _DXF Reference: http://help.autodesk.com/view/OARX/2018/ENU/?guid=GUID-107CB04F-AD4D-4D2F-8EC9-AC90888063AB
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