a8712edb54
Previously, the arc was entirely created in the GuiCommand definition. The code to create only the arc is placed inside a module so that the function can be used in scripting from the terminal, without a graphical interface.
180 lines
7.0 KiB
Python
180 lines
7.0 KiB
Python
"""Provides the object code for Draft Arc_3Points."""
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## @package arc_3points
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# \ingroup DRAFT
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# \brief Provides the object code for Draft Arc_3Points.
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# ***************************************************************************
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# * (c) 2020 Eliud Cabrera Castillo <e.cabrera-castillo@tum.de> *
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# * *
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# * This file is part of the FreeCAD CAx development system. *
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# * *
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# * This program is free software; you can redistribute it and/or modify *
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# * it under the terms of the GNU Lesser General Public License (LGPL) *
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# * as published by the Free Software Foundation; either version 2 of *
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# * the License, or (at your option) any later version. *
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# * for detail see the LICENCE text file. *
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# * *
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# * FreeCAD is distributed in the hope that it will be useful, *
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# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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# * GNU Library General Public License for more details. *
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# * *
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# * You should have received a copy of the GNU Library General Public *
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# * License along with FreeCAD; if not, write to the Free Software *
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# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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# * USA *
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# * *
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# ***************************************************************************
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import math
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import FreeCAD as App
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import Part
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import Draft
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from draftutils.messages import _msg, _err, _log
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from draftutils.translate import _tr
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if App.GuiUp:
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import draftutils.gui_utils as gui_utils
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def make_arc_3points(points, placement=None, face=False,
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support=None, map_mode="Deactivated",
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primitive=False):
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"""Draw a circular arc defined by three points in the circumference.
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Parameters
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----------
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points: list of Base::Vector3
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A list that must be three points.
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placement: Base::Placement, optional
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It defaults to `None`.
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It is a placement, comprised of a `Base` (`Base::Vector3`),
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and a `Rotation` (`Base::Rotation`).
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If it exists it moves the center of the new object to the point
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indicated by `placement.Base`, while `placement.Rotation`
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is ignored so that the arc keeps the same orientation
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with which it was created.
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If both `support` and `placement` are given,
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`placement.Base` is used for the `AttachmentOffset.Base`,
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and again `placement.Rotation` is ignored.
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face: bool, optional
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It defaults to `False`.
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If it is `True` it will create a face in the closed arc.
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Otherwise only the circumference edge will be shown.
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support: App::PropertyLinkSubList, optional
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It defaults to `None`.
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It is a list containing tuples to define the attachment
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of the new object.
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A tuple in the list needs two elements;
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the first is an external object, and the second is another tuple
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with the names of sub-elements on that external object
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likes vertices or faces.
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::
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support = [(obj, ("Face1"))]
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support = [(obj, ("Vertex1", "Vertex5", "Vertex8"))]
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This parameter sets the `Support` property but it only really affects
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the position of the new object when the `map_mode`
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is set to other than `'Deactivated'`.
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map_mode: str, optional
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It defaults to `'Deactivated'`.
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It defines the type of `'MapMode'` of the new object.
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This parameter only works when a `support` is also provided.
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Example: place the new object on a face or another object.
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::
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support = [(obj, ("Face1"))]
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map_mode = 'FlatFace'
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Example: place the new object on a plane created by three vertices
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of an object.
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::
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support = [(obj, ("Vertex1", "Vertex5", "Vertex8"))]
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map_mode = 'ThreePointsPlane'
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primitive: bool, optional
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It defaults to `False`. If it is `True`, it will create a Part
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primitive instead of a Draft object.
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In this case, `placement`, `face`, `support`, and `map_mode`
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are ignored.
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Returns
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-------
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Part::Part2DObject or Part::Feature
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The new arc object.
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Normally it returns a parametric Draft object (`Part::Part2DObject`).
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If `primitive` is `True`, it returns a basic `Part::Feature`.
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"""
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_log("make_arc_3points")
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_msg(16 * "-")
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_msg(_tr("Arc by 3 points"))
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if not isinstance(points, (list, tuple)):
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_err(_tr("Wrong input: must be list or tuple of three points."))
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return None
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if len(points) != 3:
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_err(_tr("Wrong input: must be three points."))
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return None
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if placement is not None:
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if not isinstance(placement, App.Placement):
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_err(_tr("Wrong input: incorrect placement"))
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return None
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p1, p2, p3 = points
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_edge = Part.Arc(p1, p2, p3)
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edge = _edge.toShape()
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radius = edge.Curve.Radius
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center = edge.Curve.Center
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_msg("p1: {}".format(p1))
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_msg("p2: {}".format(p2))
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_msg("p3: {}".format(p3))
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_msg(_tr("Radius: ") + "{}".format(radius))
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_msg(_tr("Center: ") + "{}".format(center))
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if primitive:
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obj = App.ActiveDocument.addObject("Part::Feature", "Arc")
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obj.Shape = edge
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_msg(_tr("Primitive object"))
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return obj
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rot = App.Rotation(edge.Curve.XAxis,
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edge.Curve.YAxis,
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edge.Curve.Axis, "ZXY")
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_placement = App.Placement(center, rot)
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start = edge.FirstParameter
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end = math.degrees(edge.LastParameter)
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obj = Draft.makeCircle(radius,
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placement=_placement, face=face,
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startangle=start, endangle=end,
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support=support)
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if App.GuiUp:
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gui_utils.autogroup(obj)
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original_placement = obj.Placement
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if placement and not support:
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obj.Placement.Base = placement.Base
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_msg(_tr("Final placement: ") + "{}".format(obj.Placement))
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if face:
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_msg(_tr("Face: True"))
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if support:
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_msg(_tr("Support: ") + "{}".format(support))
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obj.MapMode = map_mode
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_msg(_tr("Map mode: " + "{}".format(map_mode)))
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if placement:
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obj.AttachmentOffset.Base = placement.Base
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obj.AttachmentOffset.Rotation = original_placement.Rotation
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_msg(_tr("Attachment offset: {}".format(obj.AttachmentOffset)))
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_msg(_tr("Final placement: ") + "{}".format(obj.Placement))
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return obj
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