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# ***************************************************************************
# * *
# * Copyright (c) 2021 Yorik van Havre <yorik@uncreated.net> *
# * *
# * 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 *
# * *
# ***************************************************************************
"""This module contains FreeCAD commands for the Draft workbench"""
import os
from PySide.QtCore import QT_TRANSLATE_NOOP
import FreeCAD as App
from draftgeoutils.general import geomType
from draftobjects.base import DraftObject
from draftutils import gui_utils
from draftutils.messages import _err
from draftutils.translate import translate
class Hatch(DraftObject):
def __init__(self, obj):
obj.Proxy = self
self.Type = "Hatch"
self.setProperties(obj)
def setProperties(self, obj):
pl = obj.PropertiesList
if not "Base" in pl:
obj.addProperty(
"App::PropertyLink",
"Base",
"Hatch",
QT_TRANSLATE_NOOP("App::Property", "The base object used by this object"),
locked=True,
)
if not "File" in pl:
obj.addProperty(
"App::PropertyFile",
"File",
"Hatch",
QT_TRANSLATE_NOOP("App::Property", "The PAT file used by this object"),
locked=True,
)
if not "Pattern" in pl:
obj.addProperty(
"App::PropertyString",
"Pattern",
"Hatch",
QT_TRANSLATE_NOOP("App::Property", "The pattern name used by this object"),
locked=True,
)
if not "Scale" in pl:
obj.addProperty(
"App::PropertyFloat",
"Scale",
"Hatch",
QT_TRANSLATE_NOOP("App::Property", "The pattern scale used by this object"),
locked=True,
)
if not "Rotation" in pl:
obj.addProperty(
"App::PropertyAngle",
"Rotation",
"Hatch",
QT_TRANSLATE_NOOP("App::Property", "The pattern rotation used by this object"),
locked=True,
)
if not "Translate" in pl:
obj.addProperty(
"App::PropertyBool",
"Translate",
"Hatch",
QT_TRANSLATE_NOOP(
"App::Property",
"If set to False, hatch is applied as is to the faces, without translation (this might give wrong results for non-XY faces)",
),
locked=True,
)
obj.Translate = True
def onDocumentRestored(self, obj):
self.setProperties(obj)
super().onDocumentRestored(obj)
gui_utils.restore_view_object(
obj, vp_module="view_hatch", vp_class="ViewProviderDraftHatch"
)
def dumps(self):
return
def loads(self, state):
self.Type = "Hatch"
def execute(self, obj):
if (
self.props_changed_placement_only(obj)
or not obj.Base
or not obj.File
or not obj.Pattern
or not obj.Scale
or not obj.Base.isDerivedFrom("Part::Feature")
or not obj.Base.Shape.Faces
):
self.props_changed_clear()
return
if obj.File[0] == ".":
# File path relative to the FreeCAD file directory.
pat_file = os.path.join(os.path.dirname(obj.Document.FileName), obj.File)
# We need the absolute path to do some file checks.
pat_file = os.path.abspath(pat_file)
else:
pat_file = obj.File
# File checks:
if not os.path.exists(pat_file):
_err(obj.Label + ": " + translate("draft", "PAT file not found"))
self.props_changed_clear()
return
if not os.path.isfile(pat_file):
_err(obj.Label + ": " + translate("draft", "Specified PAT file is not a file"))
self.props_changed_clear()
return
if os.path.splitext(pat_file)[1].lower() != ".pat":
_err(obj.Label + ": " + translate("draft", "Specified file type is not supported"))
self.props_changed_clear()
return
if not obj.Pattern in self.getPatterns(pat_file):
_err(obj.Label + ": " + translate("draft", "Pattern not found in PAT file"))
self.props_changed_clear()
return
import Part
import TechDraw
# In TechDraw edges longer than 9999.9 (ca. 10m) are considered 'crazy'.
# Lines in hatch patterns are also checked. We need to change a parameter:
param_grp = App.ParamGet("User parameter:BaseApp/Preferences/Mod/TechDraw/debug")
if "allowCrazyEdge" not in param_grp.GetBools():
old_allow_crazy_edge = None
else:
old_allow_crazy_edge = param_grp.GetBool("allowCrazyEdge")
param_grp.SetBool("allowCrazyEdge", True)
shapes = []
for face in obj.Base.Shape.Faces:
if face.findPlane(): # Only planar faces.
face = face.copy()
if obj.Translate:
mtx = None
w = face.normalAt(0, 0)
# Try to base a matrix on the first straight edge with
# a reasonable length (> 0.001):
for e in face.Edges:
if geomType(e) == "Line":
sta = e.firstVertex().Point
end = e.lastVertex().Point
u = end.sub(sta)
if u.Length > 0.001:
u = u.normalize()
v = w.cross(u)
# fmt: off
mtx = App.Matrix(u.x, v.x, w.x, sta.x,
u.y, v.y, w.y, sta.y,
u.z, v.z, w.z, sta.z,
0.0, 0.0, 0.0, 1.0)
# fmt: on
break
# If no suitable straight edge was found use a default matrix:
if not mtx:
cen = face.CenterOfMass
rot = App.Rotation(App.Vector(0, 0, 1), w)
mtx = App.Placement(cen, rot).Matrix
face = face.transformShape(mtx.inverse()).Faces[0]
if obj.Rotation.Value:
face.rotate(App.Vector(), App.Vector(0, 0, 1), -obj.Rotation)
shape = TechDraw.makeGeomHatch(face, obj.Scale, obj.Pattern, pat_file)
if obj.Rotation.Value:
shape.rotate(App.Vector(), App.Vector(0, 0, 1), obj.Rotation)
if obj.Translate:
shape = shape.transformShape(mtx)
shapes.append(shape)
if old_allow_crazy_edge is None:
param_grp.RemBool("allowCrazyEdge")
else:
param_grp.SetBool("allowCrazyEdge", old_allow_crazy_edge)
if shapes:
obj.Shape = Part.makeCompound(shapes)
self.props_changed_clear()
def onChanged(self, obj, prop):
self.props_changed_store(prop)
def getPatterns(self, filename):
"""returns a list of pattern names found in a PAT file"""
patterns = []
if os.path.exists(filename):
with open(filename) as patfile:
for line in patfile:
if line.startswith("*"):
patterns.append(line.split(",")[0][1:])
return patterns
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