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# ***************************************************************************
# * Copyright (c) 2009, 2010 Yorik van Havre <yorik@uncreated.net> *
# * Copyright (c) 2009, 2010 Ken Cline <cline@frii.com> *
# * Copyright (c) 2020 FreeCAD Developers *
# * Copyright (c) 2024 FreeCAD Project Association *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * This program is distributed in the hope that it will be useful, *
# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
# * GNU Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with this program; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
"""Provides functions to scale shapes."""
## @package scale
# \ingroup draftfunctions
# \brief Provides functions to scale shapes.
## \addtogroup draftfunctions
# @{
import math
import FreeCAD as App
import DraftVecUtils
from draftfunctions import join
from draftmake import make_clone
from draftmake import make_copy
from draftmake import make_line
from draftmake import make_wire
from draftobjects import layer
from draftutils import gui_utils
from draftutils import params
from draftutils import utils
def scale(selection, scale, center=App.Vector(0, 0, 0), copy=False, clone=False, subelements=False):
"""scale(selection, scale, [center], [copy], [clone], [subelements])
Scales or copies selected objects.
Parameters
----------
selection: single object / list of objects / selection set
When dealing with nested objects, use `Gui.Selection.getSelectionEx("", 0)`
to create the selection set.
scale: App.Vector
The X, Y and Z component of the vector define the scale factors.
center: App.Vector, optional
Defaults to `App.Vector(0, 0, 0)`.
Center of the scale operation.
copy: bool, optional
Defaults to `False`.
If `True` the selected objects are not scaled, but scaled copies are
created instead. If clone is `True`, copy is internally set to `False`.
clone: bool, optional
Defaults to `False`.
If `True` the selected objects are not scaled, but scaled clones are
created instead.
subelements: bool, optional
Defaults to `False`.
If `True` subelements instead of whole objects are processed.
Only used if selection is a selection set.
Returns
-------
single object / list with 2 or more objects / empty list
The objects (or their copies).
"""
utils.type_check(
[
(scale, App.Vector),
(center, App.Vector),
(copy, bool),
(clone, bool),
(subelements, bool),
],
"scale",
)
sx, sy, sz = scale
if sx * sy * sz == 0:
raise ValueError("Zero component in scale vector")
if not isinstance(selection, list):
selection = [selection]
if not selection:
return None
if clone:
copy = False
if selection[0].isDerivedFrom("Gui::SelectionObject"):
if subelements:
return _scale_subelements(selection, scale, center, copy)
else:
objs, parent_places, sel_info = utils._modifiers_process_selection(
selection, (copy or clone), scale=True
)
else:
objs = utils._modifiers_filter_objects(
utils._modifiers_get_group_contents(selection), (copy or clone), scale=True
)
parent_places = None
sel_info = None
if not objs:
return None
newobjs = []
newgroups = {}
if copy or clone:
for obj in objs:
if obj.isDerivedFrom("App::DocumentObjectGroup") and obj.Name not in newgroups:
newgroups[obj.Name] = obj.Document.addObject(
obj.TypeId, utils.get_real_name(obj.Name)
)
for idx, obj in enumerate(objs):
newobj = None
create_non_parametric = False
if parent_places is not None:
parent_place = parent_places[idx]
elif hasattr(obj, "getGlobalPlacement"):
parent_place = obj.getGlobalPlacement() * obj.Placement.inverse()
else:
parent_place = App.Placement()
if obj.isDerivedFrom("App::DocumentObjectGroup"):
if copy or clone:
newobj = newgroups[obj.Name]
else:
newobj = obj
elif obj.isDerivedFrom("App::Annotation"):
if parent_place.isIdentity():
pos = obj.Position
else:
pos = parent_place.multVec(obj.Position)
pos = scale_vector_from_center(pos, scale, center)
if copy or clone:
newobj = make_copy.make_copy(obj)
newobj.Position = pos
else:
newobj = obj
if parent_place.isIdentity():
newobj.Position = pos
else:
newobj.Position = parent_place.inverse().multVec(pos)
elif obj.isDerivedFrom("Image::ImagePlane"):
if parent_place.isIdentity():
pla = obj.Placement
else:
pla = parent_place * obj.Placement
pla = App.Placement(_get_scaled_matrix(pla, scale, center))
scale = pla.Rotation.inverted().multVec(scale)
if copy:
newobj = make_copy.make_copy(obj)
newobj.Placement = pla
else:
newobj = obj
if parent_place.isIdentity():
newobj.Placement = pla
else:
newobj.Placement = parent_place.inverse() * pla
newobj.XSize = newobj.XSize * abs(scale.x)
newobj.YSize = newobj.YSize * abs(scale.y)
elif clone:
if not hasattr(obj, "Placement"):
continue
if not hasattr(obj, "Shape"):
continue
if sx == sy == sz:
newobj = make_clone.make_clone(obj, forcedraft=True)
newobj.Placement.Base = scale_vector_from_center(
newobj.Placement.Base, scale, center
)
newobj.Scale = scale
else:
if parent_place.isIdentity():
source = obj
else:
source = make_clone.make_clone(obj, forcedraft=True)
source.Placement = parent_place * obj.Placement
source.Visibility = False
delta = scale_vector_from_center(App.Vector(), scale, center)
newobj = make_clone.make_clone(source, delta=delta, forcedraft=True)
newobj.ForceCompound = True
newobj.Scale = scale
elif utils.get_type(obj) in ("Circle", "Ellipse"):
if abs(sx) == abs(sy) == abs(sz):
if parent_place.isIdentity():
pla = obj.Placement
else:
pla = parent_place * obj.Placement
pla = App.Placement(_get_scaled_matrix(pla, scale, center))
if copy:
newobj = make_copy.make_copy(obj)
newobj.Placement = pla
else:
newobj = obj
if parent_place.isIdentity():
newobj.Placement = pla
else:
newobj.Placement = parent_place.inverse() * pla
if utils.get_type(newobj) == "Circle":
newobj.Radius = abs(sx) * newobj.Radius
else:
newobj.MinorRadius = abs(sx) * newobj.MinorRadius
newobj.MajorRadius = abs(sx) * newobj.MajorRadius
if newobj.FirstAngle != newobj.LastAngle and sx * sy * sz < 0:
newobj.FirstAngle = (newobj.FirstAngle.Value + 180) % 360
newobj.LastAngle = (newobj.LastAngle.Value + 180) % 360
else:
create_non_parametric = True
elif utils.get_type(obj) == "Rectangle":
if parent_place.isIdentity():
pla = obj.Placement
else:
pla = parent_place * obj.Placement
pts = [
App.Vector(0.0, 0.0, 0.0),
App.Vector(obj.Length.Value, 0.0, 0.0),
App.Vector(obj.Length.Value, obj.Height.Value, 0.0),
App.Vector(0.0, obj.Height.Value, 0.0),
]
pts = [pla.multVec(p) for p in pts]
pts = [scale_vector_from_center(p, scale, center) for p in pts]
pla = App.Placement(_get_scaled_matrix(pla, scale, center))
x_vec = pts[1] - pts[0]
y_vec = pts[3] - pts[0]
ang = x_vec.getAngle(y_vec)
if math.isclose(ang % math.pi / 2, math.pi / 4, abs_tol=1e-6):
if copy:
newobj = make_copy.make_copy(obj)
newobj.Placement = pla
else:
newobj = obj
if parent_place.isIdentity():
newobj.Placement = pla
else:
newobj.Placement = parent_place.inverse() * pla
newobj.Length = x_vec.Length
newobj.Height = y_vec.Length
else:
newobj = make_wire.make_wire(pts, closed=True, placement=pla, face=obj.MakeFace)
gui_utils.format_object(newobj, obj)
if not copy:
obj.Document.removeObject(obj.Name)
elif utils.get_type(obj) in ("Wire", "BSpline"):
if parent_place.isIdentity():
pla = obj.Placement
else:
pla = parent_place * obj.Placement
pts = [pla.multVec(p) for p in obj.Points]
pts = [scale_vector_from_center(p, scale, center) for p in pts]
pla = App.Placement(_get_scaled_matrix(pla, scale, center))
if copy:
newobj = make_copy.make_copy(obj)
newobj.Placement = pla
else:
newobj = obj
if parent_place.isIdentity():
newobj.Placement = pla
else:
newobj.Placement = parent_place.inverse() * pla
pla_inv = pla.inverse()
newobj.Points = [pla_inv.multVec(p) for p in pts]
elif hasattr(obj, "Placement") and hasattr(obj, "Shape"):
create_non_parametric = True
if create_non_parametric:
import Part
if parent_place.isIdentity():
pla = obj.Placement
else:
pla = parent_place * obj.Placement
pla = App.Placement(_get_scaled_matrix(pla, scale, center))
mtx = _get_scaled_matrix(parent_place, scale, center)
shp = obj.Shape.copy().transformShape(pla.Matrix.inverse() * mtx, False, True)
newobj = obj.Document.addObject("Part::FeaturePython", utils.get_real_name(obj.Name))
newobj.Shape = Part.Compound([shp])
newobj.Placement = pla
if App.GuiUp:
if utils.get_type(obj) in ("Circle", "Ellipse"):
from draftviewproviders.view_base import ViewProviderDraft
ViewProviderDraft(newobj.ViewObject)
else:
newobj.ViewObject.Proxy = 0
gui_utils.format_object(newobj, obj)
if not copy:
obj.Document.removeObject(obj.Name)
if newobj is not None:
newobjs.append(newobj)
if copy:
lyr = layer.get_layer(obj)
if lyr is not None:
lyr.Proxy.addObject(lyr, newobj)
for parent in obj.InList:
if parent.isDerivedFrom("App::DocumentObjectGroup") and (parent in objs):
newgroups[parent.Name].addObject(newobj)
if not (copy or clone) or params.get_param("selectBaseObjects"):
if sel_info is not None:
gui_utils.select(sel_info)
else:
gui_utils.select(objs)
else:
gui_utils.select(newobjs)
if len(newobjs) == 1:
return newobjs[0]
return newobjs
def _scale_subelements(selection, scale, center, copy):
data_list, sel_info = utils._modifiers_process_subselection(selection, copy)
newobjs = []
if copy:
for obj, vert_idx, edge_idx, global_place in data_list:
if edge_idx >= 0:
newobjs.append(copy_scaled_edge(obj, edge_idx, scale, center, global_place))
newobjs = join.join_wires(newobjs)
else:
for obj, vert_idx, edge_idx, global_place in data_list:
if vert_idx >= 0:
scale_vertex(obj, vert_idx, scale, center, global_place)
elif edge_idx >= 0:
scale_edge(obj, edge_idx, scale, center, global_place)
if not copy or params.get_param("selectBaseObjects"):
gui_utils.select(sel_info)
else:
gui_utils.select(newobjs)
if len(newobjs) == 1:
return newobjs[0]
return newobjs
def _get_scaled_matrix(pla, scale, center):
mtx = App.Matrix(pla.Matrix)
mtx.move(-center)
mtx.scale(scale)
mtx.move(center)
return mtx
def scale_vector_from_center(vector, scale, center):
"""
Needed for SubObjects modifiers.
Implemented by Dion Moult during 0.19 dev cycle (works only with Draft Wire).
"""
return vector.sub(center).scale(*scale).add(center)
def scale_vertex(obj, vert_idx, scale, center, global_place=None):
"""
Needed for SubObjects modifiers.
Implemented by Dion Moult during 0.19 dev cycle (works only with Draft Wire).
"""
if global_place is None:
glp = obj.getGlobalPlacement()
else:
glp = global_place
points = obj.Points
points[vert_idx] = glp.inverse().multVec(
scale_vector_from_center(glp.multVec(points[vert_idx]), scale, center)
)
obj.Points = points
def scale_edge(obj, edge_idx, scale, center, global_place=None):
"""
Needed for SubObjects modifiers.
Implemented by Dion Moult during 0.19 dev cycle (works only with Draft Wire).
"""
scale_vertex(obj, edge_idx, scale, center, global_place)
if utils.is_closed_edge(edge_idx, obj):
scale_vertex(obj, 0, scale, center, global_place)
else:
scale_vertex(obj, edge_idx + 1, scale, center, global_place)
def copy_scaled_edge(obj, edge_idx, scale, center, global_place=None):
"""
Needed for SubObjects modifiers.
Implemented by Dion Moult during 0.19 dev cycle (works only with Draft Wire).
"""
if global_place is None:
glp = obj.getGlobalPlacement()
else:
glp = global_place
vertex1 = scale_vector_from_center(glp.multVec(obj.Points[edge_idx]), scale, center)
if utils.is_closed_edge(edge_idx, obj):
vertex2 = scale_vector_from_center(glp.multVec(obj.Points[0]), scale, center)
else:
vertex2 = scale_vector_from_center(glp.multVec(obj.Points[edge_idx + 1]), scale, center)
newobj = make_line.make_line(vertex1, vertex2)
gui_utils.format_object(newobj, obj)
return newobj
## @}
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