QtShim/Wrapper.py

+####################################################################################################
+
+def _qInstallMessageHandler(handler):
+    '''Install a message handler that works in all bindings
+
+    Args:
+        handler: A function that takes 3 arguments, or None
+    '''
+
+    def messageOutputHandler(*args):
+        # In Qt5 bindings, message handlers are passed 3 arguments
+        # The first argument is a QtMsgType
+        # The last argument is the message to be printed
+        # The Middle argument (if passed) is a QMessageLogContext
+        if len(args) == 3:
+            msgType, logContext, msg = args
+        elif len(args) == 2:
+            msgType, msg = args
+            logContext = None
+        else:
+            raise TypeError(
+                'handler expected 2 or 3 arguments, got {0}'.format(len(args)))
+
+        if isinstance(msg, bytes):
+            # In python 3, some bindings pass a bytestring, which cannot be
+            # used elsewhere. Decoding a python 2 or 3 bytestring object will
+            # consistently return a unicode object.
+            msg = msg.decode()
+
+        handler(msgType, logContext, msg)
+
+    if not handler:
+        handler = messageOutputHandler
+    return Qt._QtCore.qInstallMessageHandler(handler)

QtShim/__init__.py

+"""Minimal Python 3 shim around PyQt5 and Pyside2 Qt bindings for QML applications.
+
+Forked from https://github.com/mottosso/Qt.py under MIT License.
+Copyright (c) 2016 Marcus Ottosson
+
+Changes
+
+* Dropped Python2 and Qt4 support
+* Focus on last Python 3 release
+* Focus on last Qt API : QML
+
+Requirements
+
+* make use of lazy loading to speed up startup time !
+"""
+
+# Fixme: ressource file Patro/QtApplication/rcc/PatroRessource.py
+
+####################################################################################################
+
+# Enable support for `from Qt import *`
+__all__ = []
+
+####################################################################################################
+
+import importlib
+import logging
+import os
+import sys
+import types
+
+from .QtConfig import _common_members, _misplaced_members, _compatibility_members
+
+####################################################################################################
+
+# _module_logger = logging.getLogger(__name__)
+
+####################################################################################################
+
+# Flags from environment variables
+QT_VERBOSE = bool(os.getenv('QT_VERBOSE'))
+
+QT_PREFERRED_BINDING = os.getenv('QT_PREFERRED_BINDING', '')
+if QT_PREFERRED_BINDING:
+    QT_PREFERRED_BINDING = list(x for x in QT_PREFERRED_BINDING.split(',') if x)
+else:
+    # on dec 2018, PySide2 is still not fully operational
+    QT_PREFERRED_BINDING = ('PyQt5', 'PySide2')
+
+####################################################################################################
+
+def _new_module(name):
+    return types.ModuleType(__name__ + '.' + name)
+
+####################################################################################################
+
+# Reference to Qt.py
+Qt = sys.modules[__name__]
+Qt.QtCompat = _new_module('QtCompat')
+
+####################################################################################################
+
+def _log(text):
+    if QT_VERBOSE:
+        # _logger print
+        sys.stdout.write(text + '\n')
+
+####################################################################################################
+
+def _import_sub_module(module, name):
+    """import a submodule"""
+    _log('_import_sub_module {} {}'.format(module, name))
+    module_name = module.__name__ + '.' + name # e.g. PyQt5.QtCore
+    module = importlib.import_module(module_name)
+    return module
+
+####################################################################################################
+
+def _setup(module, extras):
+    """Install common submodules"""
+
+    Qt.__binding__ = module.__name__
+
+    for name in list(_common_members) + extras:
+        try:
+            submodule = _import_sub_module(module, name)
+        except ImportError:
+            try:
+                # For extra modules like sip and shiboken that may not be
+                # children of the binding.
+                submodule = __import__(name)
+            except ImportError:
+                continue
+
+        setattr(Qt, '_' + name, submodule)
+
+        if name not in extras:
+            # Store reference to original binding
+            setattr(Qt, name, _new_module(name)) # Qt.QtCore = module(so module)
+
+####################################################################################################
+
+def _reassign_misplaced_members(binding):
+    """Apply misplaced members from `binding` to Qt.py
+
+    Arguments:
+        binding (dict): Misplaced members
+
+    """
+
+    for src, dst in _misplaced_members[binding].items():
+        # print()
+        dst_value = None
+
+        # Fixme: to func
+        src_parts = src.split('.')
+        src_module = src_parts[0]
+        if len(src_parts):
+            src_member = src_parts[1:]
+        else:
+            src_member = None
+
+        if isinstance(dst, (list, tuple)):
+            dst, dst_value = dst
+        # print(src, '->', dst, dst_value)
+        # print(src_module, src_member)
+
+        dst_parts = dst.split('.')
+        dst_module = dst_parts[0]
+        if len(dst_parts):
+            dst_member = dst_parts[1]
+        else:
+            dst_member = None
+        # print(dst_module, dst_member)
+
+        # Get the member we want to store in the namesapce.
+        if not dst_value:
+            try:
+                _part = getattr(Qt, '_' + src_module)
+                while src_member:
+                    member = src_member.pop(0)
+                    _part = getattr(_part, member)
+                dst_value = _part
+            except AttributeError:
+                # If the member we want to store in the namespace does not
+                # exist, there is no need to continue. This can happen if a
+                # request was made to rename a member that didn't exist, for
+                # example if QtWidgets isn't available on the target platform.
+                _log('Misplaced member has no source: {0}'.format(src))
+                continue
+        # print(dst_value)
+
+        try:
+            # Fixme: src_object ???
+            src_object = getattr(Qt, dst_module)
+        except AttributeError:
+            # print('Failed to get src_object')
+            if dst_module not in _common_members:
+                # Only create the Qt parent module if its listed in
+                # _common_members. Without this check, if you remove QtCore
+                # from _common_members, the default _misplaced_members will add
+                # Qt.QtCore so it can add Signal, Slot, etc.
+                msg = "Not creating missing member module '{m}' for '{c}'"
+                _log(msg.format(m=dst_module, c=dst_member))
+                continue
+            # If the dst is valid but the Qt parent module does not exist
+            # then go ahead and create a new module to contain the member.
+            setattr(Qt, dst_module, _new_module(dst_module))
+            src_object = getattr(Qt, dst_module)
+            # Enable direct import of the new module
+            sys.modules[__name__ + '.' + dst_module] = src_object
+
+        if not dst_value:
+            dst_value = getattr(Qt, '_' + src_module)
+            if src_member:
+                dst_value = getattr(dst_value, src_member)
+
+        setattr(
+            src_object,
+            dst_member or dst_module,
+            dst_value
+        )
+
+####################################################################################################
+
+def _build_compatibility_members(binding, decorators=None):
+    """Apply `binding` to QtCompat
+
+    Arguments:
+        binding (str): Top level binding in _compatibility_members.
+        decorators (dict, optional): Provides the ability to decorate the
+            original Qt methods when needed by a binding. This can be used
+            to change the returned value to a standard value. The key should
+            be the classname, the value is a dict where the keys are the
+            target method names, and the values are the decorator functions.
+
+    """
+
+    decorators = decorators or dict()
+
+    # Allow optional site-level customization of the compatibility members.
+    # This method does not need to be implemented in QtSiteConfig.
+    try:
+        import QtSiteConfig
+    except ImportError:
+        pass
+    else:
+        if hasattr(QtSiteConfig, 'update_compatibility_decorators'):
+            QtSiteConfig.update_compatibility_decorators(binding, decorators)
+
+    _QtCompat = type('QtCompat', (object,), {})
+
+    for classname, bindings in _compatibility_members[binding].items():
+        attrs = {}
+        for target, binding in bindings.items():
+            namespaces = binding.split('.')
+            try:
+                src_object = getattr(Qt, '_' + namespaces[0])
+            except AttributeError as e:
+                _log('QtCompat: AttributeError: %s' % e)
+                # Skip reassignment of non-existing members.
+                # This can happen if a request was made to
+                # rename a member that didn't exist, for example
+                # if QtWidgets isn't available on the target platform.
+                continue
+
+            # Walk down any remaining namespace getting the object assuming
+            # that if the first namespace exists the rest will exist.
+            for namespace in namespaces[1:]:
+                src_object = getattr(src_object, namespace)
+
+            # decorate the Qt method if a decorator was provided.
+            if target in decorators.get(classname, []):
+                # staticmethod must be called on the decorated method to
+                # prevent a TypeError being raised when the decorated method
+                # is called.
+                src_object = staticmethod(
+                    decorators[classname][target](src_object))
+
+            attrs[target] = src_object
+
+        # Create the QtCompat class and install it into the namespace
+        compat_class = type(classname, (_QtCompat,), attrs)
+        setattr(Qt.QtCompat, classname, compat_class)
+
+####################################################################################################
+
+def _pyside2():
+    """Initialise PySide2
+
+    These functions serve to test the existence of a binding
+    along with set it up in such a way that it aligns with
+    the final step; adding members from the original binding
+    to Qt.py
+
+    """
+
+    import PySide2 as module
+    extras = []
+    # try:
+    #     from PySide2 import shiboken2
+    #     extras.append('shiboken2')
+    # except ImportError:
+    #     pass
+
+    _setup(module, extras)
+    Qt.__binding_version__ = module.__version__
+
+    # if hasattr(Qt, '_shiboken2'):
+    #     Qt.QtCompat.wrapInstance = _wrapinstance
+    #     Qt.QtCompat.getCppPointer = _getcpppointer
+    #     Qt.QtCompat.delete = shiboken2.delete
+
+    if hasattr(Qt, '_QtCore'):
+        Qt.__qt_version__ = Qt._QtCore.qVersion()
+
+    # if hasattr(Qt, '_QtWidgets'):
+    #     Qt.QtCompat.setSectionResizeMode = \
+    #         Qt._QtWidgets.QHeaderView.setSectionResizeMode
+
+    _reassign_misplaced_members('PySide2')
+    # _build_compatibility_members('PySide2')
+
+####################################################################################################
+
+def _pyqt5():
+    """Initialise PyQt5"""
+
+    import PyQt5 as module
+    extras = []
+    # try:
+    #     import sip
+    #     extras.append(sip.__name__)
+    # except ImportError:
+    #     sip = None
+
+    _setup(module, extras)
+    # if hasattr(Qt, '_sip'):
+    #     Qt.QtCompat.wrapInstance = _wrapinstance
+    #     Qt.QtCompat.getCppPointer = _getcpppointer
+    #     Qt.QtCompat.delete = sip.delete
+
+    if hasattr(Qt, '_QtCore'):
+        Qt.__binding_version__ = Qt._QtCore.PYQT_VERSION_STR
+        Qt.__qt_version__ = Qt._QtCore.QT_VERSION_STR
+
+    # if hasattr(Qt, '_QtWidgets'):
+    #     Qt.QtCompat.setSectionResizeMode = \
+    #         Qt._QtWidgets.QHeaderView.setSectionResizeMode
+
+    _reassign_misplaced_members('PyQt5')
+    # _build_compatibility_members('PyQt5')
+
+####################################################################################################
+
+def _install():
+
+    # Default order (customise order and content via QT_PREFERRED_BINDING)
+    order = QT_PREFERRED_BINDING
+
+    available = {
+        'PySide2': _pyside2,
+        'PyQt5': _pyqt5,
+    }
+
+    _log("Order: {}".format(' '.join(order)))
+
+    found_binding = False
+    for name in order:
+        _log('Trying %s' % name)
+
+        try:
+            available[name]()
+            found_binding = True
+            break
+
+        except ImportError as e:
+            _log('ImportError: %s' % e)
+
+        except KeyError:
+            _log("ImportError: Preferred binding '%s' not found." % name)
+
+    if not found_binding:
+        # If not binding were found, throw this error
+        raise ImportError('No Qt binding were found.')
+
+    # Install individual members
+    for name, members in _common_members.items():
+        try:
+            their_submodule = getattr(Qt, '_' + name)
+        except AttributeError:
+            continue
+
+        our_submodule = getattr(Qt, name)
+
+        # Enable import *
+        __all__.append(name)
+
+        # Enable direct import of submodule,
+        # e.g. import Qt.QtCore
+        sys.modules[__name__ + '.' + name] = our_submodule
+
+        for member in members:
+            # Accept that a submodule may miss certain members.
+            try:
+                their_member = getattr(their_submodule, member)
+            except AttributeError:
+                _log("'%s.%s' was missing." % (name, member))
+                continue
+            setattr(our_submodule, member, their_member)
+
+    # Enable direct import of QtCompat
+    sys.modules['Qt.QtCompat'] = Qt.QtCompat
+
+####################################################################################################
+
+_install()
+
+####################################################################################################
+
+# Fixme: Python 3.7
+# def __getattr__(name):
+#     print('__getattr__', name)
+
+####################################################################################################
+
+# Setup Binding Enum states
+Qt.IsPySide2 = Qt.__binding__ == 'PySide2'
+Qt.IsPyQt5 = not Qt.IsPySide2

QtShim/not-implemented.py

+####################################################################################################
+
+def _getcpppointer(object):
+    if hasattr(Qt, '_shiboken2'):
+        return getattr(Qt, '_shiboken2').getCppPointer(object)[0]
+    elif hasattr(Qt, '_sip'):
+        return getattr(Qt, '_sip').unwrapinstance(object)
+    raise AttributeError("'module' has no attribute 'getCppPointer'")
+
+####################################################################################################
+
+def _wrapinstance(ptr, base=None):
+    '''Enable implicit cast of pointer to most suitable class
+
+    This behaviour is available in sip per default.
+
+    Based on http://nathanhorne.com/pyqtpyside-wrap-instance
+
+    Usage:
+        This mechanism kicks in under these circumstances.
+        1. Qt.py is using PySide 1 or 2.
+        2. A `base` argument is not provided.
+
+        See :func:`QtCompat.wrapInstance()`
+
+    Arguments:
+        ptr (int): Pointer to QObject in memory
+        base (QObject, optional): Base class to wrap with. Defaults to QObject,
+            which should handle anything.
+
+    '''
+
+    assert isinstance(ptr, int), "Argument 'ptr' must be of type <int>"
+    assert (base is None) or issubclass(base, Qt.QtCore.QObject), (
+        "Argument 'base' must be of type <QObject>")
+
+    if Qt.IsPyQt4 or Qt.IsPyQt5:
+        func = getattr(Qt, '_sip').wrapinstance
+    elif Qt.IsPySide2:
+        func = getattr(Qt, '_shiboken2').wrapInstance
+    elif Qt.IsPySide:
+        func = getattr(Qt, '_shiboken').wrapInstance
+    else:
+        raise AttributeError("'module' has no attribute 'wrapInstance'")
+
+    if base is None:
+        q_object = func(int(ptr), Qt.QtCore.QObject)
+        meta_object = q_object.metaObject()
+        class_name = meta_object.className()
+        super_class_name = meta_object.superClass().className()
+
+        if hasattr(Qt.QtWidgets, class_name):
+            base = getattr(Qt.QtWidgets, class_name)
+
+        elif hasattr(Qt.QtWidgets, super_class_name):
+            base = getattr(Qt.QtWidgets, super_class_name)
+
+        else:
+            base = Qt.QtCore.QObject
+
+    return func(int(ptr), base)
+
+####################################################################################################
+
+def _translate(context, sourceText, *args):
+    # In Qt4 bindings, translate can be passed 2 or 3 arguments
+    # In Qt5 bindings, translate can be passed 2 arguments
+    # The first argument is disambiguation[str]
+    # The last argument is n[int]
+    # The middle argument can be encoding[QtCore.QCoreApplication.Encoding]
+    if len(args) == 3:
+        disambiguation, encoding, n = args
+    elif len(args) == 2:
+        disambiguation, n = args
+        encoding = None
+    else:
+        raise TypeError(
+            'Expected 4 or 5 arguments, got {0}.'.format(len(args) + 2))
+
+    if hasattr(Qt.QtCore, 'QCoreApplication'):
+        app = getattr(Qt.QtCore, 'QCoreApplication')
+    else:
+        raise NotImplementedError(
+            'Missing QCoreApplication implementation for {binding}'.format(
+                binding=Qt.__binding__,
+            )
+        )
+    if Qt.__binding__ in ('PySide2', 'PyQt5'):
+        sanitized_args = [context, sourceText, disambiguation, n]
+    else:
+        sanitized_args = [
+            context,
+            sourceText,
+            disambiguation,
+            encoding or app.CodecForTr,
+            n
+        ]
+    return app.translate(*sanitized_args)
+
+####################################################################################################
+####################################################################################################
+
+def _none():
+    '''Internal option (used in installer)'''
+
+    Mock = type('Mock', (), {'__getattr__': lambda Qt, attr: None})
+
+    Qt.__binding__ = 'None'
+    Qt.__qt_version__ = '0.0.0'
+    Qt.__binding_version__ = '0.0.0'
+    Qt.QtCompat.loadUi = lambda uifile, baseinstance=None: None
+    Qt.QtCompat.setSectionResizeMode = lambda *args, **kwargs: None
+
+    for submodule in _common_members.keys():
+        setattr(Qt, submodule, Mock())
+        setattr(Qt, '_' + submodule, Mock())

README.rst

@@ -66,6 +66,9 @@
 ..  https://img.shields.io/github/stars/badges/shields.svg?style=social&label=Star
 .. -*- Mode: rst -*-
 
+.. |ezdxf| replace:: ezdxf
+.. _ezdxf: https://ezdxf.readthedocs.io/en/latest
+
 .. |Inkscape| replace:: Inkscape
 .. _Inkscape: https://inkscape.org
 

bin/patro

+#! /usr/bin/env python3
+
+####################################################################################################
+#
+# Patro - A Python library to make patterns for fashion design
+# Copyright (C) 2017 Fabrice Salvaire
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+####################################################################################################
+
+####################################################################################################
+
+from Patro.Common.Logging import Logging
+Logging.setup_logging()
+
+####################################################################################################
+
+from Patro.QtApplication.QmlApplication import Application
+
+####################################################################################################
+
+# application = Application()
+Application.setup_gui_application()
+application = Application.create()
+application.exec_()

doc/sphinx/source/faq.rst

@@ -23,8 +23,8 @@ How to get help or report an issue ?
 ..   List for announcements regarding Patro releases and development
 .. `Devel List <https://groups.google.com/forum/#!forum/Patro-devel>`_
 ..   List for developers of Patro
-.. 
-.. **If you encounter an issue, please fill an issue** on the `Issue Tracker <https://github.com/FabriceSalvaire/Patro/issues>`_.
-.. 
+
+**If you encounter an issue, please fill an issue** on the `Issue Tracker <https://github.com/FabriceSalvaire/Patro/issues>`_.
+
 .. (*) Despite Google Groups has many drawbacks, I don't have actually enough resources to run GNU Mailman or
 .. Discourse on my own IT infrastructure.

doc/sphinx/source/features-all.rst

@@ -16,9 +16,11 @@ Patro implements several components:
 * import of SVG pattern (as well as PDF using a conversion tools like |Inkscape|_)
 * digitalisation of patterns acquired with a camera **ACTUALLY NOT RELEASED WITH OPEN SOURCE LICENCE**
 
-.. note:: Patro is just a core engine actually. It doesn't implement a GUI similar to |Valentina|_.
+.. note:: Patro is just a core engine actually. It doesn't implement a full featured GUI similar to
+          |Valentina|_.
 
-.. note:: Patro doesn't implement 3D feature actually, like automatic clothe fitting on avatar and tension map.
+.. note:: Patro doesn't implement 3D feature actually, like automatic clothe fitting on avatar and
+          tension map.
 
 Geometry Engine
 ===============
@@ -28,10 +30,13 @@ The geometry engine implements:
 * 2D vector and usual transformations
 * usual 2D primitives:
 
- * point, segment, line
+ * point, segment, line, polyline
  * triangle, rectangle, polygon
- * circle and conic
+ * circle and ellipse
  * quadratic and cubic Bézier curve
+ * B-spline curve
+ * path made of linear segments with an optional bulge at breaks, as well as quadratic and cubic
+   Bézier curve segments.
 
 * perimeter and area
 * primitive intersection
@@ -40,30 +45,47 @@ The geometry engine implements:
 Pattern Engine
 ==============
 
-* Measurements can be imported from Valentina *.vit* or a YAML file.  We can merge several files to a measurement set.
+* Measurements can be imported from Valentina *.vit* or a YAML file.  We can merge several files to
+  a measurement set.
 * Measurements are lazily evaluated using |Sympy|_ symbolic computation, which means we can compute
   exact values and the order of definition doesn't matter.
 
 Graphic Engine
 ==============
 
-* show drawing on screen with : |Matplotlib|_
+Patro features a basic |Qt|_ user interface which can display a graphic scene and features item
+selection so as to provide the minimum to work with.
+
+The graphic engine implement a 2D graphic scene which is rendered by a painter.  A scene contains
+graphic items like text, image line, circle and Bézier curve.
+
+A painter is responsible to render the scene on the screen or a graphic file format. The graphic
+engine is able to render on the following:
+
+* show drawing on screen with : |Matplotlib|_, |Qt|_
 * export drawing to : PDF, SVG, DXF, LaTeX Tikz
 * export tiled pattern on A4 sheets : PDF, LaTeX Tikz
+
+Also the graphic engine is able to render a DXF made of these graphic items: line, circle, arc,
+ellipse, lwpolyline and spline.
+
+Implementation details:
+
 * PDF export is implemented with the help of the |Reportlab|_ package
-* DXF export is implemented with the help of the |ezdxf|_ package of `Manfred Moitzi <https://github.com/mozman>`_
+* DXF import/export is implemented with the help of the |ezdxf|_ package of `Manfred Moitzi
+  <https://github.com/mozman>`_
 
 Pattern Format Support
 ======================
 
 * |Valentina|_ format: read/write *.val* and *.vit* file, but partially implemented, cf. supra for details
-* import pattern from SVG
-* **DXF is not yet supported**
+* import pattern from SVG and DXF (**partially implemented**)
 
 .. note:: PDF and SVG format are convertible to each other without data loss
           (font handling require more attention).
 
-.. note:: The |Inkscape|_ free software is able to import a lot of file formats like PDF, DXF and to save it to SVG.
+.. note:: The |Inkscape|_ free software is able to import a lot of file formats like PDF, DXF and to
+          save it to SVG.
 
 Pattern Format Compatibility
 ----------------------------

examples/dxf/test-dxf-r15.dxf

+999
+dxflib 3.17.0.0
+  0
+SECTION
+  2
+HEADER
+  9
+$ACADVER
+  1
+AC1015
+  9
+$HANDSEED
+  5
+FFFF
+  9
+$DIMADEC
+ 70
+0
+  9
+$DIMASZ
+ 40
+2.5
+  9
+$DIMAUNIT
+ 70
+0
+  9
+$DIMAZIN
+ 70
+2
+  9
+$DIMDEC
+ 70
+4
+  9
+$DIMDSEP
+ 70
+46
+  9
+$DIMEXE
+ 40
+1.25
+  9
+$DIMEXO
+ 40
+0.625
+  9
+$DIMGAP
+ 40
+0.625
+  9
+$DIMLUNIT
+ 70
+2
+  9
+$DIMSCALE
+ 40
+1.0
+  9
+$DIMTSZ
+ 40
+0.0
+  9
+$DIMTXT
+ 40
+2.5
+  9
+$DIMZIN
+ 70
+8
+  9
+$DWGCODEPAGE
+  3
+ANSI_1252
+  9
+$INSUNITS
+ 70
+4
+  9
+$LTSCALE
+ 40
+1.0
+  9
+$MAXACTVP
+ 70
+64
+  9
+$MEASUREMENT
+ 70
+1
+  9
+$PDMODE
+ 70
+0
+  9
+$PDSIZE
+ 40
+0.0
+  0
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examples/dxf/test-dxf.py

+####################################################################################################
+
+from pathlib import Path
+
+from Patro.Common.Logging import Logging
+Logging.setup_logging()
+
+from Patro.FileFormat.Dxf.Importer import DxfImporter
+from Patro.GeometryEngine.Conic import Circle2D, Ellipse2D
+from Patro.GeometryEngine.Segment import Segment2D
+from Patro.GeometryEngine.Spline import BSpline2D
+from Patro.GeometryEngine.Vector import Vector2D
+from Patro.GraphicEngine.GraphicScene.GraphicItem import GraphicPathStyle, GraphicBezierStyle
+from Patro.GraphicEngine.Painter.QtPainter import QtScene
+from Patro.GraphicStyle import Colors, StrokeStyle
+
+####################################################################################################
+
+def spline_from_svg(scene_importer):
+
+    # m 74.999689,150.7821
+    # c
+    # 9,-10 14.500002,-5 18.916662,-0.83334 4.41667,4.16667 7.749999,7.5 11.083339,5.83334
+    # 3.33333,-1.66667 6.66666,-8.33334 13.33333,-11.66667 6.66667,-3.33333 16.66667,-3.33333
+    # 16.66667,-3.33333
+
+    # Vector2D[40. 50.]
+    # Vector2D[49. 60.]
+    # Vector2D[54.500002 55.      ]
+    # Vector2D[58.916662 50.83334 ]
+    # Vector2D[63.333332 46.66667 ]
+    # Vector2D[66.666661 43.33334 ]
+    # Vector2D[70.000001 45.      ]
+    # Vector2D[73.333331 46.66667 ]
+    # Vector2D[76.666661 53.33334 ]
+    # Vector2D[83.333331 56.66667 ]
+    # Vector2D[90.000001 60.      ]
+    # Vector2D[100.000001  60.      ]
+    # Vector2D[100.000001  60.      ]
+
+    # CubicBezier2D(Vector2D[40. 50.], Vector2D[49. 60.], Vector2D[54.5 55. ], Vector2D[58.91666667 50.83333333])
+    # CubicBezier2D(Vector2D[58.91666667 50.83333333], Vector2D[63.33333333 46.66666667], Vector2D[66.66666667 43.33333333], Vector2D[70. 45.])
+    # CubicBezier2D(Vector2D[70. 45.], Vector2D[73.33333333 46.66666667], Vector2D[76.66666667 53.33333333], Vector2D[83.33333333 56.66666667])
+    # CubicBezier2D(Vector2D[83.33333333 56.66666667], Vector2D[90. 60.], Vector2D[100.  60.], Vector2D[100.  60.])
+
+    x0, y0 = 40, 50
+    control_points = (
+        (9, -10),
+        (14.500002, -5),
+        (18.916662, -0.83334),
+
+        (4.41667, 4.16667),
+        (7.749999, 7.5),
+        (11.083339, 5.83334),
+
+        (3.33333, -1.66667),
+        (6.66666, -8.33334),
+        (13.33333, -11.66667),
+
+        (6.66667, -3.33333),
+        (16.66667, -3.33333),
+        (16.66667, -3.33333),
+    )
+
+    vertices = []
+    point = Vector2D(x0, y0)
+    vertices.append(point)
+    for i, xy in enumerate(control_points):
+        xi, yi = xy
+        yi = -yi
+        if (i+1) % 3:
+            x = xi + x0
+            y = yi + y0
+        else:
+            x0 += xi
+            y0 += yi
+            x, y = x0, y0
+        point = Vector2D(x, y)
+        vertices.append(point)
+
+    path_style = GraphicBezierStyle(
+        line_width=3.0,
+        stroke_color=Colors.blue,
+        stroke_style=StrokeStyle.SolidLine,
+        show_control=True,
+        control_color=Colors.red,
+    )
+
+    for vertex in vertices:
+        print(vertex)
+    # scene_importer.scene.bezier_path(vertices, degree=3, path_style=path_style, user_data=None)
+
+####################################################################################################
+
+class SceneImporter:
+
+    ##############################################
+
+    def __init__(self, dxf_path):
+
+        self._importer = DxfImporter(dxf_path)
+        self._scene = QtScene()
+
+        self._bounding_box = None
+        for item in self._importer:
+            self._add_item(item)
+        self._scene.bounding_box = self._bounding_box # Fixme:
+
+    ##############################################
+
+    @property
+    def scene(self):
+        return self._scene
+
+    ##############################################
+
+    def _update_bounding_box(self, item):
+
+        if hasattr(item, 'bounding_box'):
+            interval = item.bounding_box
+            if self._bounding_box is None:
+                self._bounding_box = interval
+            else:
+                self._bounding_box |= interval
+
+    ##############################################
+
+    def _add_item(self, item):
+
+        # Fixme:
+        path_style = GraphicPathStyle(
+            line_width=2.0,
+            stroke_color=Colors.black,
+            stroke_style=StrokeStyle.SolidLine,
+        )
+
+        if isinstance(item, Segment2D):
+            self._scene.segment(item.p0, item.p1,
+                                path_style,
+                                user_data=item,
+            )
+        elif isinstance(item, Circle2D):
+            kwargs = dict(user_data=item)
+            if item.domain:
+                kwargs['start_angle'] = item.domain.start
+                kwargs['stop_angle'] = item.domain.stop
+            self._scene.circle(item.center, item.radius,
+                               path_style,
+                               **kwargs,
+            )
+        elif isinstance(item, BSpline2D):
+            path_style = GraphicPathStyle(
+                line_width=3.,
+                stroke_color=Colors.green,
+            ) # Fixme
+            self._scene.polyline(item.points,
+                                 path_style,
+                                 user_data=item,
+            )
+            path_style = GraphicBezierStyle(
+                line_width=5.0,
+                stroke_color=Colors.black,
+                show_control=True,
+                control_color=Colors.red,
+            ) # Fixme
+            for bezier in item.to_bezier():
+                self._scene.cubic_bezier(*bezier.points,
+                                         path_style,
+                                         user_data=item,
+                )
+        elif isinstance(item, Ellipse2D):
+            self._scene.ellipse(item.center,
+                                item.x_radius,
+                                item.y_radius,
+                                item.angle,
+                                path_style,
+                                user_data=item,
+            )
+        elif isinstance(item, list):
+            for segment in item:
+                self._add_item(segment)
+
+        self._update_bounding_box(item)
+
+####################################################################################################
+
+# filename = 'protection-rectangulaire-v2.dxf'
+filename = 'test-dxf-r15.dxf'
+try:
+    dxf_path = Path(__file__).parent.joinpath(filename)
+except:
+    dxf_path = Path('examples', 'dxf', filename)
+
+scene_importer = SceneImporter(dxf_path)
+
+# spline_from_svg(scene_importer)
+
+application.qml_application.scene = scene_importer.scene

examples/geometry/spline.py

+####################################################################################################
+#
+# Patro - A Python library to make patterns for fashion design
+# Copyright (C) 2017 Fabrice Salvaire
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+####################################################################################################
+
+####################################################################################################
+
+from Patro.GeometryEngine.Spline import BSpline2D
+from Patro.GeometryEngine.Vector import Vector2D
+
+import numpy as np
+import matplotlib.pyplot as plt
+
+####################################################################################################
+
+def plot_spline(spline, control=True, deboor=True, naive=False, offset=0):
+
+    # for k in range(spline.order):
+    #     for i in range(spline.degree-k, spline.order):
+    #         print(i, k)
+    #         axes.plot(ts, [spline.basis_function(i, k, t) for t in ts])
+
+    offset = np.array((0, offset))
+
+    if control:
+        control_point_array = spline.point_array + offset
+        axes.plot(control_point_array[:,0], control_point_array[:,1])
+
+    if naive:
+        knots = spline.knots
+        print(knots)
+        # for t_inf in spline.knot_iter:
+        #     ts = np.linspace(t_inf, t_inf +1, 30)
+        for i in range(len(spline.knots) -1):
+            t_inf, t_sup = spline.knots[i], spline.knots[i+1]
+            if t_sup == spline.end_knot:
+                t_sup -= 1e-6
+            ts = np.linspace(t_inf, t_sup, 30)
+            if t_inf < t_sup:
+                curve_points = np.zeros((len(ts), 2))
+                for i, t in enumerate(ts):
+                    p = spline.point_at_t(t, naive=True)
+                    curve_points[i] = p
+                curve_points += offset
+                axes.plot(curve_points[:,0], curve_points[:,1])
+
+    if deboor:
+        end_knot = spline.end_knot
+        if not spline.uniform:
+            end_knot -= 1e-6
+        print('end knot', spline.uniform, end_knot)
+        ts = np.linspace(0, end_knot, 50)
+        curve_points = np.zeros((len(ts), 2))
+        for i, t in enumerate(ts):
+            p = spline.point_at_t(t)
+            curve_points[i] = p
+        curve_points += offset
+        axes.plot(curve_points[:,0], curve_points[:,1], 'o')
+
+####################################################################################################
+
+# degree = 3
+# order = degree +1
+# for number_of_points in range(order, order + 5):
+#     print(BSpline2D.uniform_knots(degree, number_of_points))
+
+# points = (
+#     Vector2D(1, 1),
+#     Vector2D(2, 2),
+#     Vector2D(3, 2),
+#     Vector2D(4, 1),
+# )
+# degree = 3
+# spline = BSpline2D(points, degree)
+# plot_spline(spline)
+
+points = (
+    Vector2D(0, 0),
+    Vector2D(5, 5),
+    Vector2D(10, -5),
+    Vector2D(15, 5),
+    Vector2D(20, -5),
+    Vector2D(25, 5),
+)
+degree = 3
+spline = BSpline2D(points, degree)
+
+# spline2 = spline
+# spline2 = spline2.insert_knot(1.5)
+# spline2 = spline2.insert_knot(2.5)
+
+spline2 = spline.to_bezier_form()
+bezier_curves = spline.to_bezier()
+print(bezier_curves)
+
+figure, axes = plt.subplots()
+axes.grid(True)
+plot_spline(spline, deboor=True, naive=True, offset=-.1)
+plot_spline(spline2, deboor=True, naive=True, offset=.1)
+plt.show()

examples/geometry/test-path.py

+####################################################################################################
+
+from Patro.Common.Logging import Logging
+Logging.setup_logging()
+
+from Patro.GeometryEngine.Path import (
+    Path2D,
+    LinearSegment, QuadraticBezierSegment, CubicBezierSegment
+)
+from Patro.GeometryEngine.Vector import Vector2D
+from Patro.GraphicEngine.GraphicScene.GraphicItem import GraphicPathStyle, GraphicBezierStyle
+from Patro.GraphicEngine.Painter.QtPainter import QtScene
+from Patro.GraphicStyle import Colors, StrokeStyle
+
+####################################################################################################
+
+class SceneBuilder:
+
+    ##############################################
+
+    def __init__(self):
+
+        self._scene = QtScene()
+
+        self._bounding_box = None
+        for path in (
+                self._make_path1(),
+                self._make_path2(),
+                self._make_path3(),
+                self._make_path4(),
+                ):
+            self._add_path(path)
+        self._scene.bounding_box = self._bounding_box # Fixme:
+
+    ##############################################
+
+    @property
+    def scene(self):
+        return self._scene
+
+    ##############################################
+
+    def _update_bounding_box(self, item):
+
+        interval = item.bounding_box
+        if self._bounding_box is None:
+            self._bounding_box = interval
+        else:
+            self._bounding_box |= interval
+
+    ##############################################
+
+    def _make_path1(self):
+
+        start_point = Vector2D(0, 0)
+        path = Path2D(start_point)
+        path.horizontal_to(10)
+        path.vertical_to(10)
+        path.north_east_to(10)
+        path.north_west_to(10)
+        path.south_west_to(10)
+        path.south_east_to(5)
+        path.south_to(5)
+        path.west_to(10)
+        path.north_to(5)
+        path.east_to(5)
+
+        return path
+
+    ##############################################
+
+    def _make_path2(self):
+
+        start_point = Vector2D(20, 0)
+        path = Path2D(start_point)
+        path.horizontal_to(10)
+        path.vertical_to(10)
+        path.north_east_to(10)
+        path.north_west_to(10)
+        path.south_west_to(10)
+        path.south_east_to(5)
+
+        return path
+
+    ##############################################
+
+    def _make_path3(self):
+
+        start_point = Vector2D(40, 0)
+        path = Path2D(start_point)
+        path.line_to(Vector2D(10, 0))
+        path.line_to(Vector2D(0, 10), radius=5)
+        path.line_to(Vector2D(10, 0), radius=5)
+        path.line_to(Vector2D(0, 20), radius=5)
+        path.line_to(Vector2D(-10, 0), radius=5)
+        path.line_to(Vector2D(0, -10), radius=5)
+        path.close(radius=0) # Fixme:
+
+        return path
+
+    ##############################################
+
+    def _make_path4(self):
+
+        start_point = Vector2D(70, 0)
+        path = Path2D(start_point)
+        # path.line_to(Vector2D(10, 0))
+        # path.line_to(Vector2D(0, 10), radius=5)
+        # path.line_to(Vector2D(-10, 0), radius=5)
+        path.east_to(10)
+        path.north_to(10, radius=5)
+        path.west_to(10, radius=5)
+
+        return path
+
+    ##############################################
+
+    def _add_path(self, path):
+
+        path_style = GraphicPathStyle(
+            line_width=3.0,
+            stroke_color=Colors.black,
+            stroke_style=StrokeStyle.SolidLine,
+        )
+
+        for item in path:
+            # print('Path part:', item)
+            if isinstance(item, LinearSegment):
+                # print('linear', item.start_point, item.stop_point, item.points)
+                if item.radius is not None:
+                    print('-'*10)
+                    print(item.bissector)
+                    print(item.bulge_angle, item.bulge_center, item.start_point, item.stop_point)
+                    print(item.bulge_geometry)
+                    arc = item.bulge_geometry
+                    self._scene.circle(arc.center, arc.radius,
+                                       path_style,
+                                       start_angle=arc.domain.start,
+                                       stop_angle=arc.domain.stop,
+                                       user_data=item,
+                    )
+                self._scene.segment(*item.points,
+                                    path_style,
+                                    user_data=item,
+                )
+            elif isinstance(item, QuadraticBezierSegment):
+                self._scene.quadratic_bezier(*item.points,
+                                             path_style,
+                                             user_data=item,
+                )
+            elif isinstance(item, CubicBezierSegment):
+                self._scene.cubic_bezier(*item.points,
+                                         path_style,
+                                         user_data=item,
+                )
+            # Fixme: why here ???
+            self._update_bounding_box(item)
+
+####################################################################################################
+
+scene = QtScene()
+
+scene_builder = SceneBuilder()
+
+application.qml_application.scene = scene_builder.scene

examples/patterns/several-pieces.val

+<?xml version="1.0" encoding="UTF-8"?>
+<pattern>
+    <!--Pattern created with Valentina v0.6.0.912b (https://valentinaproject.bitbucket.io/).-->
+    <version>0.7.10</version>
+    <unit>cm</unit>
+    <description/>
+    <notes/>
+    <measurements/>
+    <increments/>
+    <previewCalculations/>
+    <draw name="Pattern piece 1">
+        <calculation>
+            <point id="1" mx="0.132292" my="0.264583" name="A" showLabel="true" type="single" x="0.79375" y="1.05833"/>
+            <point angle="0" basePoint="1" id="2" length="10" lineColor="black" mx="0.132292" my="0.264583" name="A1" showLabel="true" type="endLine" typeLine="hair"/>
+            <point angle="270" basePoint="2" id="3" length="10&#10;" lineColor="black" mx="0.132292" my="0.264583" name="A2" showLabel="true" type="endLine" typeLine="hair"/>
+            <point firstPoint="1" id="4" mx="0.132292" my="0.264583" name="A3" secondPoint="3" showLabel="true" type="pointOfIntersection"/>
+            <line firstPoint="3" id="5" lineColor="black" secondPoint="4" typeLine="hair"/>
+            <line firstPoint="4" id="6" lineColor="black" secondPoint="1" typeLine="hair"/>
+        </calculation>
+        <modeling>
+            <point id="13" idObject="1" inUse="false" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+            <point id="14" idObject="2" inUse="false" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+            <point id="15" idObject="3" inUse="false" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+            <point id="16" idObject="4" inUse="false" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+            <point id="22" idObject="1" inUse="true" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+            <point id="23" idObject="2" inUse="true" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+            <point id="24" idObject="4" inUse="true" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+        </modeling>
+        <details>
+            <detail forbidFlipping="false" forceFlipping="false" hideMainPath="false" id="17" inLayout="true" mx="0" my="0" name="Detail 1" seamAllowance="false" united="false" version="2" width="1">
+                <data annotation="" foldPosition="" fontSize="0" height="1" letter="" mx="0" my="0" onFold="false" orientation="" quantity="1" rotation="0" rotationWay="" tilt="" visible="false" width="1"/>
+                <patternInfo fontSize="0" height="1" mx="0" my="0" rotation="0" visible="false" width="1"/>
+                <grainline arrows="0" length="1" mx="0" my="0" rotation="90" visible="false"/>
+                <nodes>
+                    <node idObject="13" type="NodePoint"/>
+                    <node idObject="14" type="NodePoint"/>
+                    <node idObject="15" type="NodePoint"/>
+                    <node idObject="16" type="NodePoint"/>
+                </nodes>
+            </detail>
+            <detail forbidFlipping="false" forceFlipping="false" hideMainPath="false" id="25" inLayout="true" mx="0" my="0" name="Detail 11" seamAllowance="false" united="false" version="2" width="1">
+                <data annotation="" foldPosition="" fontSize="0" height="1" letter="" mx="0" my="0" onFold="false" orientation="" quantity="1" rotation="0" rotationWay="" tilt="" visible="false" width="1"/>
+                <patternInfo fontSize="0" height="1" mx="0" my="0" rotation="0" visible="false" width="1"/>
+                <grainline arrows="0" length="1" mx="0" my="0" rotation="90" visible="false"/>
+                <nodes>
+                    <node idObject="22" type="NodePoint"/>
+                    <node idObject="23" type="NodePoint"/>
+                    <node idObject="24" type="NodePoint"/>
+                </nodes>
+            </detail>
+        </details>
+        <groups/>
+    </draw>
+    <draw name="Pattern piece 2">
+        <calculation>
+            <point id="7" mx="0.132292" my="0.264583" name="B" showLabel="true" type="single" x="13.6961" y="1.05833"/>
+            <point angle="0" basePoint="7" id="8" length="5" lineColor="black" mx="0.132292" my="0.264583" name="B1" showLabel="true" type="endLine" typeLine="hair"/>
+            <point firstPoint="7" id="9" length="CurrentLength/2" lineColor="black" mx="0.132292" my="0.264583" name="B2" secondPoint="8" showLabel="true" type="alongLine" typeLine="none"/>
+            <point angle="0" firstPoint="9" id="10" length="-5&#10;" lineColor="black" mx="0.132292" my="0.264583" name="B3" secondPoint="8" showLabel="true" type="normal" typeLine="hair"/>
+            <line firstPoint="7" id="11" lineColor="black" secondPoint="10" typeLine="hair"/>
+            <line firstPoint="10" id="12" lineColor="black" secondPoint="8" typeLine="hair"/>
+        </calculation>
+        <modeling>
+            <point id="18" idObject="7" inUse="false" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+            <point id="19" idObject="8" inUse="false" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+            <point id="20" idObject="10" inUse="false" mx="0.132292" my="0.264583" showLabel="true" type="modeling"/>
+        </modeling>
+        <details>
+            <detail forbidFlipping="false" forceFlipping="false" hideMainPath="false" id="21" inLayout="true" mx="0" my="-0.0264583" name="Detail 2" seamAllowance="false" united="false" version="2" width="1">
+                <data annotation="" foldPosition="" fontSize="0" height="1" letter="" mx="0" my="0" onFold="false" orientation="" quantity="1" rotation="0" rotationWay="" tilt="" visible="false" width="1"/>
+                <patternInfo fontSize="0" height="1" mx="0" my="0" rotation="0" visible="false" width="1"/>
+                <grainline arrows="0" length="1" mx="0" my="0" rotation="90" visible="false"/>
+                <nodes>
+                    <node idObject="18" type="NodePoint"/>
+                    <node idObject="19" type="NodePoint"/>
+                    <node idObject="20" type="NodePoint"/>
+                </nodes>
+            </detail>
+        </details>
+        <groups/>
+    </draw>
+</pattern>

examples/test-pattern.py

@@ -15,7 +15,11 @@ from Patro.GraphicEngine.Painter.TexPainter import TexPainter
 
 ####################################################################################################
 
-val_file = ValFile(Path('patterns', 'flat-city-trouser.val'))
+try:
+    val_path = Path(__file__).parent.joinpath('patterns', 'flat-city-trouser.val')
+except:
+    val_path = Path('examples', 'patterns', 'flat-city-trouser.val')
+val_file = ValFile(val_path)
 pattern = val_file.pattern
 
 pattern.dump()
@@ -32,8 +36,6 @@ output.mkdir(exist_ok=True)
 
 val_file.write(output.joinpath('write-test.val'))
 
-scene = pattern.detail_scene()
-
 # tex_path = output.joinpath('pattern-a0.tex')
 # paper = PaperSize('a0', 'portrait', 10)
 # tex_painter = TexPainter(str(tex_path), scene, paper)
@@ -58,6 +60,6 @@ scene = pattern.detail_scene()
 # svg_path = output.joinpath('pattern-a0.svg')
 # svg_painter = SvgPainter(svg_path, scene, paper)
 
-paper = PaperSize('a0', 'portrait', 10)
-dxf_path = output.joinpath('pattern.dxf')
-dxf_painter = DxfPainter(dxf_path, scene, paper)
+# paper = PaperSize('a0', 'portrait', 10)
+# dxf_path = output.joinpath('pattern.dxf')
+# dxf_painter = DxfPainter(dxf_path, scene, paper)

examples/test-qt-application.py

+####################################################################################################
+
+from pathlib import Path
+
+from Patro.Common.Logging import Logging
+Logging.setup_logging()
+
+from Patro.FileFormat.Valentina.Pattern import ValFile
+from Patro.GraphicEngine.Painter.Paper import PaperSize
+from Patro.GraphicEngine.Painter.QtPainter import QtScene
+
+####################################################################################################
+
+# val_file = 'flat-city-trouser.val'
+val_file = 'path-bezier.val'
+
+try:
+    val_path = Path(__file__).parent.joinpath('patterns', val_file)
+except:
+    val_path = Path('examples', 'patterns', val_file)
+val_file = ValFile(val_path)
+pattern = val_file.pattern
+
+kwargs = dict(scene_cls=QtScene)
+first_scope = pattern.scope(0)
+scene = first_scope.sketch.detail_scene(**kwargs)
+
+application.qml_application.scene = scene

examples/test-valentina-import.py

+####################################################################################################
+
+from pathlib import Path
+
+from Patro.Common.Logging import Logging
+Logging.setup_logging()
+
+from Patro.FileFormat.Valentina.Pattern import ValFileReader
+
+####################################################################################################
+
+# val_file = 'several-pieces.val'
+val_file = 'flat-city-trouser.val'
+
+parts = ('patterns', val_file)
+try:
+    val_path = Path(__file__).parent.joinpath(*parts)
+except:
+    val_path = Path('examples', *parts)
+val_file = ValFileReader(val_path)
+pattern = val_file.pattern
+
+# pattern.dump()
+
+# for calculation in pattern.calculations:
+#     print(calculation.to_python())
+
+# nodes = pattern.calculator.dag.topological_sort()
+# for node in nodes:
+#     print(node.data)
+
+# output = Path('output')
+# output.mkdir(exist_ok=True)
+
+# val_file.write(output.joinpath('write-test.val'))

non-public-submodule @ aa055092

-Subproject commit 5327151f61f1c57144eb8f118bae275c55b9e247
+Subproject commit aa0550928dda27d42b6951b75366866595b54caf

requirements.txt

 IntervalArithmetic
 PyYAML
+Rtree
 astunparse
 ezdxf
 lxml

setenv.sh

-source /opt/python-virtual-env/py36/bin/activate
+source /opt/python-virtual-env/py37/bin/activate
 append_to_python_path_if_not ${PWD}
 append_to_python_path_if_not ${PWD}/tools
+
+if [ -e ${PWD}/non-public-submodule/setenv.sh ]; then
+  source ${PWD}/non-public-submodule/setenv.sh
+fi

unit-test/GeometryEngine/test_Bezier.py

@@ -73,6 +73,41 @@ class TestCubicBezier(unittest.TestCase):
 
 ####################################################################################################
 
+class TestCubicSpline(unittest.TestCase):
+
+    ##############################################
+
+    def test_spline_part(self):
+
+        p0 = Vector2D(0, 0)
+        p1 = Vector2D(3, 5)
+        p2 = Vector2D(6, 5)
+        p3 = Vector2D(10, 0)
+
+        bezier = CubicBezier2D(p0, p1, p2, p3)
+        spline = bezier.to_spline()
+        bezier2 = spline.to_bezier()
+
+        self.assertTrue(bezier2.is_close(bezier))
+
+    ##############################################
+
+    def test_spline(self):
+
+        points = (
+            Vector2D(0, 0),
+            Vector2D(3, 5),
+            Vector2D(6, 6),
+            Vector2D(10, 8),
+            Vector2D(15, 10),
+            Vector2D(19, 15),
+        )
+        spline = CubicSpline2D(points)
+        for part in spline.iter_on_parts():
+            print(part)
+
+####################################################################################################
+
 if __name__ == '__main__':
 
     unittest.main()