--- /dev/null
+## Copyright (C) 2018-20xx CEA/DEN, EDF R&D
+##
+## This library is free software; you can redistribute it and/or
+## modify it under the terms of the GNU Lesser General Public
+## License as published by the Free Software Foundation; either
+## version 2.1 of the License, or (at your option) any later version.
+##
+## This library 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
+## Lesser General Public License for more details.
+##
+## You should have received a copy of the GNU Lesser General Public
+## License along with this library; if not, write to the Free Software
+## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##
+## See http:##www.salome-platform.org/ or
+## email : webmaster.salome@opencascade.com<mailto:webmaster.salome@opencascade.com>
+##
+
+"""
+ Test1578.py
+ Test case for issue #1578 "arc problems"
+"""
+
+from salome.shaper import model
+
+model.begin()
+partSet = model.moduleDocument()
+model.addParameter(partSet, "R_stator_int", "75")
+model.addParameter(partSet, "R_stator_ext", "120")
+model.addParameter(partSet, "angle", "7.5")
+model.addParameter(partSet, "Length_1", "1.6")
+model.addParameter(partSet, "Length_2", "2.29")
+model.addParameter(partSet, "Length_3", "3.5")
+model.addParameter(partSet, "h", "1.3")
+model.addParameter(partSet, "h1", "1.9")
+model.addParameter(partSet, "h2", "15.49")
+model.addParameter(partSet, "R_rotor", "67.5")
+model.addParameter(partSet, "R_abre", "29.5")
+model.addParameter(partSet, "l_aimant", "37.5")
+model.addParameter(partSet, "h_aimant", "64")
+model.addParameter(partSet, "R_aimant", "70.5")
+model.addParameter(partSet, "l_cut_rotor", "37.92")
+model.addParameter(partSet, "h_cut_rotor", "63.8")
+model.addParameter(partSet, "R_interm", "72.75")
+model.addParameter(partSet, "angle_aimant", "22.5")
+Part_1 = model.addPart(partSet)
+Part_1_doc = Part_1.document()
+Sketch_1 = model.addSketch(Part_1_doc, model.defaultPlane("XOY"))
+SketchLine_1 = Sketch_1.addLine(0, 0, 115.7437109013936, 7.586243611563176)
+SketchLine_1.setAuxiliary(True)
+SketchPoint_1 = Sketch_1.addPoint(model.selection("VERTEX", "PartSet/Origin"))
+SketchConstraintCoincidence_1 = Sketch_1.setCoincident(SketchLine_1.startPoint(), SketchPoint_1.result())
+SketchLine_2 = Sketch_1.addLine(model.selection("EDGE", "PartSet/OX"))
+SketchConstraintAngle_1 = Sketch_1.setAngle(SketchLine_2.result(), SketchLine_1.result(), "angle/2")
+SketchLine_3 = Sketch_1.addLine(0, 0, 101.5823409704896, 13.37356889953941)
+SketchLine_3.setAuxiliary(True)
+SketchConstraintCoincidence_2 = Sketch_1.setCoincident(SketchLine_3.startPoint(), SketchPoint_1.result())
+SketchConstraintAngle_2 = Sketch_1.setAngle(SketchLine_2.result(), SketchLine_3.result(), "angle")
+SketchArc_1 = Sketch_1.addArc(0, 0, 75, 0, 74.35836460303578, 9.789464416503867, False)
+SketchConstraintCoincidence_3 = Sketch_1.setCoincident(SketchArc_1.center(), SketchPoint_1.result())
+SketchConstraintCoincidence_4 = Sketch_1.setCoincident(SketchArc_1.startPoint(), SketchLine_2.result())
+SketchConstraintCoincidence_5 = Sketch_1.setCoincident(SketchArc_1.endPoint(), SketchLine_3.result())
+SketchArc_2 = Sketch_1.addArc(0, 0, 120, 0, 118.9733833648573, 15.66314306640619, False)
+SketchConstraintCoincidence_6 = Sketch_1.setCoincident(SketchArc_2.center(), SketchPoint_1.result())
+SketchConstraintCoincidence_7 = Sketch_1.setCoincident(SketchArc_2.startPoint(), SketchLine_2.result())
+SketchConstraintCoincidence_8 = Sketch_1.setCoincident(SketchArc_2.endPoint(), SketchLine_3.result())
+SketchConstraintRadius_1 = Sketch_1.setRadius(SketchArc_1.results()[1], "R_stator_int")
+SketchConstraintRadius_2 = Sketch_1.setRadius(SketchArc_2.results()[1], "R_stator_ext")
+SketchLine_4 = Sketch_1.addLine(74.35836460303578, 9.789464416503867, 118.9733833648573, 15.66314306640619)
+SketchConstraintCoincidence_9 = Sketch_1.setCoincident(SketchArc_1.endPoint(), SketchLine_4.startPoint())
+SketchConstraintCoincidence_10 = Sketch_1.setCoincident(SketchArc_2.endPoint(), SketchLine_4.endPoint())
+SketchLine_5 = Sketch_1.addLine(75, 0, 120, 0)
+SketchConstraintCoincidence_11 = Sketch_1.setCoincident(SketchArc_1.startPoint(), SketchLine_5.startPoint())
+SketchConstraintCoincidence_12 = Sketch_1.setCoincident(SketchArc_2.startPoint(), SketchLine_5.endPoint())
+SketchArc_3 = Sketch_1.addArc(0, 0, 76.22453904297332, 3.392587167080116, 76.01524902943686, 6.585735721443648, False)
+SketchConstraintCoincidence_13 = Sketch_1.setCoincident(SketchArc_3.center(), SketchPoint_1.result())
+SketchArc_4 = Sketch_1.addArc(0, 0, 78.14887552638105, 2.827234330967321, 77.84932919450701, 7.397428199400126, False)
+SketchConstraintCoincidence_14 = Sketch_1.setCoincident(SketchArc_4.center(), SketchPoint_1.result())
+SketchArc_5 = Sketch_1.addArc(0, 0, 93.65305549448868, 2.630835712510912, 93.19523358987767, 9.615848175181137, False)
+SketchConstraintCoincidence_15 = Sketch_1.setCoincident(SketchArc_5.center(), SketchPoint_1.result())
+SketchConstraintRadius_3 = Sketch_1.setRadius(SketchArc_3.results()[1], "R_stator_int+h")
+SketchConstraintRadius_4 = Sketch_1.setRadius(SketchArc_4.results()[1], "R_stator_int+h+h1")
+SketchConstraintRadius_5 = Sketch_1.setRadius(SketchArc_5.results()[1], "R_stator_int+h+h1+h2")
+SketchConstraintDistance_1 = Sketch_1.setDistance(SketchArc_5.endPoint(), SketchLine_1.result(), "Length_3")
+SketchConstraintDistance_2 = Sketch_1.setDistance(SketchArc_5.startPoint(), SketchLine_1.result(), "Length_3")
+SketchConstraintDistance_3 = Sketch_1.setDistance(SketchArc_4.endPoint(), SketchLine_1.result(), "Length_2")
+SketchConstraintDistance_4 = Sketch_1.setDistance(SketchArc_4.startPoint(), SketchLine_1.result(), "Length_2")
+SketchConstraintDistance_5 = Sketch_1.setDistance(SketchArc_3.endPoint(), SketchLine_1.result(), "Length_1")
+SketchConstraintDistance_6 = Sketch_1.setDistance(SketchArc_3.startPoint(), SketchLine_1.result(), "Length_1")
+SketchLine_6 = Sketch_1.addLine(77.84932919450701, 7.397428199400126, 93.19523358987767, 9.615848175181137)
+SketchConstraintCoincidence_16 = Sketch_1.setCoincident(SketchArc_4.endPoint(), SketchLine_6.startPoint())
+SketchConstraintCoincidence_17 = Sketch_1.setCoincident(SketchArc_5.endPoint(), SketchLine_6.endPoint())
+SketchLine_7 = Sketch_1.addLine(78.14887552638105, 2.827234330967321, 93.65305549448868, 2.630835712510912)
+SketchConstraintCoincidence_18 = Sketch_1.setCoincident(SketchArc_4.startPoint(), SketchLine_7.startPoint())
+SketchConstraintCoincidence_19 = Sketch_1.setCoincident(SketchArc_5.startPoint(), SketchLine_7.endPoint())
+SketchLine_8 = Sketch_1.addLine(76.01524902943686, 6.585735721443648, 74.71774217241287, 6.500692629007779)
+SketchConstraintCoincidence_20 = Sketch_1.setCoincident(SketchArc_3.endPoint(), SketchLine_8.startPoint())
+SketchConstraintCoincidence_21 = Sketch_1.setCoincident(SketchLine_8.endPoint(), SketchArc_1.results()[1])
+SketchLine_9 = Sketch_1.addLine(76.22453904297332, 3.392587167080116, 74.92703218594932, 3.307544074644247)
+SketchConstraintCoincidence_22 = Sketch_1.setCoincident(SketchArc_3.startPoint(), SketchLine_9.startPoint())
+SketchConstraintCoincidence_23 = Sketch_1.setCoincident(SketchLine_9.endPoint(), SketchArc_1.results()[1])
+SketchConstraintParallel_1 = Sketch_1.setParallel(SketchLine_8.result(), SketchLine_1.result())
+SketchConstraintParallel_2 = Sketch_1.setParallel(SketchLine_9.result(), SketchLine_1.result())
+SketchArc_6 = Sketch_1.addArc(92.99435209423221, 6.095171858515482, 93.19523358987767, 9.615848175181137, 93.65305549448868, 2.630835712510912, True)
+SketchConstraintCoincidence_24 = Sketch_1.setCoincident(SketchArc_5.endPoint(), SketchArc_6.startPoint())
+SketchConstraintCoincidence_25 = Sketch_1.setCoincident(SketchLine_6.endPoint(), SketchArc_6.startPoint())
+SketchConstraintCoincidence_26 = Sketch_1.setCoincident(SketchArc_5.startPoint(), SketchArc_6.endPoint())
+SketchArc_7 = Sketch_1.addArc(78.08372875230802, 4.389817544749706, 76.015249029437, 6.585735721444, 77.84932919450701, 7.397428199400126, True)
+SketchConstraintCoincidence_27 = Sketch_1.setCoincident(SketchArc_3.endPoint(), SketchArc_7.startPoint())
+SketchConstraintCoincidence_28 = Sketch_1.setCoincident(SketchLine_8.startPoint(), SketchArc_7.startPoint())
+SketchConstraintCoincidence_29 = Sketch_1.setCoincident(SketchArc_4.endPoint(), SketchArc_7.endPoint())
+SketchConstraintCoincidence_30 = Sketch_1.setCoincident(SketchLine_6.startPoint(), SketchArc_7.endPoint())
+SketchArc_8 = Sketch_1.addArc(77.98869779703921, 5.839709741271425, 76.22453904297301, 3.39258716708, 78.14887552638105, 2.827234330967321, False)
+SketchConstraintCoincidence_31 = Sketch_1.setCoincident(SketchArc_3.startPoint(), SketchArc_8.startPoint())
+SketchConstraintCoincidence_32 = Sketch_1.setCoincident(SketchLine_9.startPoint(), SketchArc_8.startPoint())
+SketchConstraintCoincidence_33 = Sketch_1.setCoincident(SketchArc_4.startPoint(), SketchArc_8.endPoint())
+SketchConstraintCoincidence_34 = Sketch_1.setCoincident(SketchLine_7.startPoint(), SketchArc_8.endPoint())
+SketchConstraintEqual_1 = Sketch_1.setEqual(SketchArc_7.results()[1], SketchArc_8.results()[1])
+SketchArc_9 = Sketch_1.addArc(0, 0, 78.14887552638101, 2.827234330967, 78.2, 0, True)
+SketchConstraintCoincidence_35 = Sketch_1.setCoincident(SketchArc_9.center(), SketchPoint_1.result())
+SketchConstraintCoincidence_36 = Sketch_1.setCoincident(SketchArc_4.startPoint(), SketchArc_9.startPoint())
+SketchConstraintCoincidence_37 = Sketch_1.setCoincident(SketchLine_7.startPoint(), SketchArc_9.startPoint())
+SketchConstraintCoincidence_38 = Sketch_1.setCoincident(SketchArc_8.endPoint(), SketchArc_9.startPoint())
+SketchConstraintCoincidence_39 = Sketch_1.setCoincident(SketchArc_9.endPoint(), SketchLine_5.result())
+model.do()
+
+model.checkSketch(Sketch_1)
+
+# Check sketch is valid after adding the arc
+SketchArc_10 = Sketch_1.addArc(0, 0, 77.84932919450699, 7.397428199400125, 77.5309881595101, 10.20714823162807, False)
+SketchConstraintCoincidence_40 = Sketch_1.setCoincident(SketchLine_1.startPoint(), SketchArc_10.center())
+SketchConstraintCoincidence_41 = Sketch_1.setCoincident(SketchArc_4.endPoint(), SketchArc_10.startPoint())
+SketchConstraintCoincidence_42 = Sketch_1.setCoincident(SketchLine_4.result(), SketchArc_10.endPoint())
+model.do()
+
+model.checkSketch(Sketch_1)
+
+# Check sketch is valid after multi-rotation
+SketchMultiRotation_1_objects = [SketchArc_1.results()[1], SketchLine_9.result(), SketchLine_8.result(), SketchArc_3.results()[1], SketchArc_8.results()[1], SketchArc_7.results()[1], SketchArc_9.results()[1], SketchArc_4.results()[1], SketchArc_10.results()[1], SketchLine_4.result(), SketchLine_7.result(), SketchLine_6.result(), SketchArc_5.results()[1], SketchArc_6.results()[1], SketchArc_2.results()[1]]
+SketchMultiRotation_1 = Sketch_1.addRotation(SketchMultiRotation_1_objects, SketchLine_2.startPoint(), "angle", 12)
+model.do()
+
+model.checkSketch(Sketch_1)
+
+# Move arc's extremity and check sketch
+SketchArc_121 = Sketch_1.addArc(0, 0, 36.41124276672319, 6.344317038870018, 8.424960444516818, 35.98678924293296, False)
+SketchConstraintCoincidence_43 = Sketch_1.setCoincident(SketchLine_1.startPoint(), SketchArc_121.center())
+model.do()
+
+for i in range(0, 10):
+ Sketch_1.move(SketchArc_121.startPoint(), SketchArc_121.startPoint().x() + 1., SketchArc_121.startPoint().y())
+ model.do()
+ model.checkSketch(Sketch_1)
+
+model.end()
