#*************************************************************************** #* Copyright (c) 2004 Juergen Riegel * #* * #* This file is part of the FreeCAD CAx development system. * #* * #* 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. * #* * #* FreeCAD 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 FreeCAD; if not, write to the Free Software * #* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * #* USA * #* * #***************************************************************************/ import FreeCAD, os, unittest, tempfile, math from FreeCAD import Base class ConsoleTestCase(unittest.TestCase): def setUp(self): self.count = 0 def testPrint(self): FreeCAD.Console.PrintMessage(" Printing message\n") FreeCAD.Console.PrintError(" Printing error\n") FreeCAD.Console.PrintWarning(" Printing warning\n") FreeCAD.Console.PrintLog(" Printing Log\n") def testSynchronPrintFromThread(self): # http://python-kurs.eu/threads.php try: import _thread as thread, time except Exception: import thread, time def adder(): lock.acquire() self.count=self.count+1 # call of Console method is thread-safe FreeCAD.Console.PrintMessage("Call from Python thread: count="+str(self.count)+"\n") lock.release() lock=thread.allocate_lock() for i in range(10): thread.start_new(adder,()) time.sleep(3) self.assertEqual(self.count, 10, "Synchronization of threads failed") FreeCAD.Console.PrintMessage(str(self.count)+"\n") def testAsynchronPrintFromThread(self): # http://python-kurs.eu/threads.php try: import _thread as thread, time except Exception: import thread, time def adder(): self.count=self.count+1 # call of Console method is thread-safe FreeCAD.Console.PrintMessage("Call from Python thread (not synchronized): count="+str(self.count)+"\n") lock=thread.allocate_lock() for i in range(10): thread.start_new(adder,()) time.sleep(3) FreeCAD.Console.PrintMessage(str(self.count)+"\n") # def testStatus(self): # SLog = FreeCAD.GetStatus("Console","Log") # SErr = FreeCAD.GetStatus("Console","Err") # SWrn = FreeCAD.GetStatus("Console","Wrn") # SMsg = FreeCAD.GetStatus("Console","Msg") # FreeCAD.SetStatus("Console","Log",1) # FreeCAD.SetStatus("Console","Err",1) # FreeCAD.SetStatus("Console","Wrn",1) # FreeCAD.SetStatus("Console","Msg",1) # self.assertEqual(FreeCAD.GetStatus("Console","Msg"),1,"Set and read status failed (Console,Msg)") # self.assertEqual(FreeCAD.GetStatus("Console","Err"),1,"Set and read status failed (Console,Err)") # self.assertEqual(FreeCAD.GetStatus("Console","Wrn"),1,"Set and read status failed (Console,Wrn)") # self.assertEqual(FreeCAD.GetStatus("Console","Log"),1,"Set and read status failed (Console,Log)") # FreeCAD.SetStatus("Console","Log",0) # FreeCAD.SetStatus("Console","Err",0) # FreeCAD.SetStatus("Console","Wrn",0) # FreeCAD.SetStatus("Console","Msg",0) # self.assertEqual(FreeCAD.GetStatus("Console","Msg"),0,"Set and read status failed (Console,Msg)") # self.assertEqual(FreeCAD.GetStatus("Console","Err"),0,"Set and read status failed (Console,Err)") # self.assertEqual(FreeCAD.GetStatus("Console","Wrn"),0,"Set and read status failed (Console,Wrn)") # self.assertEqual(FreeCAD.GetStatus("Console","Log"),0,"Set and read status failed (Console,Log)") # FreeCAD.SetStatus("Console","Log",SLog) # FreeCAD.SetStatus("Console","Err",SErr) # FreeCAD.SetStatus("Console","Wrn",SWrn) # FreeCAD.SetStatus("Console","Msg",SMsg) def tearDown(self): pass def testILoggerBlocker(self): if FreeCAD.GuiUp: import QtUnitGui QtUnitGui.testILoggerBlocker() class ParameterTestCase(unittest.TestCase): def setUp(self): self.TestPar = FreeCAD.ParamGet("System parameter:Test") def testGroup(self): #FreeCAD.Console.PrintLog("Base::ParameterTestCase::testGroup\n") # check on Group creation Temp = self.TestPar.GetGroup("44") self.assertTrue(self.TestPar.HasGroup("44"),"Test on created group failed") # check on Deletion self.TestPar.RemGroup("44") self.assertTrue(self.TestPar.HasGroup("44"),"A referenced group must not be deleted") Temp = 0 def testGroupNames(self): with self.assertRaises(ValueError): # no empty groups allowed self.TestPar.GetGroup("") grp1 = self.TestPar.GetGroup("////Sub1/////Sub2/////") grp2 = self.TestPar.GetGroup("Sub1/Sub2") self.assertEqual(grp1.GetGroupName(), "Sub2") self.assertEqual(grp2.GetGroupName(), "Sub2") # check on special conditions def testInt(self): #FreeCAD.Console.PrintLog("Base::ParameterTestCase::testInt\n") #Temp = FreeCAD.ParamGet("System parameter:Test/44") # check on Int self.TestPar.SetInt("44",4711) self.assertEqual(self.TestPar.GetInt("44"), 4711,"In and out error at Int") # check on Deletion self.TestPar.RemInt("44") self.assertEqual(self.TestPar.GetInt("44",1), 1,"Deletion error at Int") def testBool(self): #FreeCAD.Console.PrintLog("Base::ParameterTestCase::testBool\n") # check on Int self.TestPar.SetBool("44",1) self.assertEqual(self.TestPar.GetBool("44"), 1,"In and out error at Bool") # check on Deletion self.TestPar.RemBool("44") self.assertEqual(self.TestPar.GetBool("44",0), 0,"Deletion error at Bool") def testFloat(self): #FreeCAD.Console.PrintLog("Base::ParameterTestCase::testFloat\n") #Temp = FreeCAD.ParamGet("System parameter:Test/44") # check on Int self.TestPar.SetFloat("44",4711.4711) self.assertEqual(self.TestPar.GetFloat("44"), 4711.4711,"In and out error at Float") # check on Deletion self.TestPar.RemFloat("44") self.assertEqual(self.TestPar.GetFloat("44",1.1), 1.1,"Deletion error at Float") def testString(self): #FreeCAD.Console.PrintLog("Base::ParameterTestCase::testFloat\n") #Temp = FreeCAD.ParamGet("System parameter:Test/44") # check on Int self.TestPar.SetString("44","abcdefgh") self.assertEqual(self.TestPar.GetString("44"), "abcdefgh","In and out error at String") # check on Deletion self.TestPar.RemString("44") self.assertEqual(self.TestPar.GetString("44","hallo"), "hallo","Deletion error at String") def testNesting(self): # Parameter testing #FreeCAD.Console.PrintLog("Base::ParameterTestCase::testNesting\n") for i in range(50): self.TestPar.SetFloat(str(i),4711.4711) self.TestPar.SetInt(str(i),4711) self.TestPar.SetBool(str(i),1) Temp = self.TestPar.GetGroup(str(i)) for l in range(50): Temp.SetFloat(str(l),4711.4711) Temp.SetInt(str(l),4711) Temp.SetBool(str(l),1) Temp = 0 def testExportImport(self): # Parameter testing #FreeCAD.Console.PrintLog("Base::ParameterTestCase::testNesting\n") self.TestPar.SetFloat("ExTest",4711.4711) self.TestPar.SetInt("ExTest",4711) self.TestPar.SetString("ExTest","4711") self.TestPar.SetBool("ExTest",1) Temp = self.TestPar.GetGroup("ExTest") Temp.SetFloat("ExTest",4711.4711) Temp.SetInt("ExTest",4711) Temp.SetString("ExTest","4711") Temp.SetBool("ExTest",1) TempPath = tempfile.gettempdir() + os.sep + "ExportTest.FCExport" self.TestPar.Export(TempPath) Temp = self.TestPar.GetGroup("ImportTest") Temp.Import(TempPath) self.assertEqual(Temp.GetFloat("ExTest"), 4711.4711,"ExportImport error") Temp = 0 def tearDown(self): #remove all TestPar = FreeCAD.ParamGet("System parameter:Test") TestPar.Clear() class AlgebraTestCase(unittest.TestCase): def setUp(self): pass def testAngle(self): v1 = FreeCAD.Vector(0,0,0.000001) v2 = FreeCAD.Vector(0,0.000001,0) self.assertAlmostEqual(v1.getAngle(v2), math.pi/2) self.assertAlmostEqual(v2.getAngle(v1), math.pi/2) def testVector2d(self): v = FreeCAD.Base.Vector2d(1.0, 1.0) v.rotate(math.pi/2) self.assertAlmostEqual(v.x, -1.0) self.assertAlmostEqual(v.y, 1.0) def testAngleWithNullVector(self): v1 = FreeCAD.Vector(0,0,0) v2 = FreeCAD.Vector(0,1,0) self.assertTrue(math.isnan(v1.getAngle(v2))) self.assertTrue(math.isnan(v2.getAngle(v1))) def testMatrix(self): m=FreeCAD.Matrix(4,2,1,0,1,1,1,0,0,0,1,0,0,0,0,1) u=m.multiply(m.inverse()) self.assertEqual(u, FreeCAD.Matrix(),"Invalid inverse of matrix") def testRotAndMoveMatrix(self): m1=FreeCAD.Matrix() m1.move(10,5,-3) m1.rotateY(.2) m2=FreeCAD.Matrix() m2.rotateY(.2) m2.move(10,5,-3) m3=FreeCAD.Matrix() m3.move(10,5,-3) m4=FreeCAD.Matrix() m4.rotateY(.2) self.assertNotEqual(m1, m3*m4, "Wrong multiplication order") self.assertEqual(m1, m4*m3 , "Wrong multiplication order") self.assertEqual(m2, m3*m4 , "Wrong multiplication order") self.assertNotEqual(m2, m4*m3, "Wrong multiplication order") def testRotationFromMatrix(self): m1 = FreeCAD.Matrix() m1.rotateZ(.2) m1.scale(0.5) m1.rotateY(.2) m1.scale(3) m1.move(10,5,-3) r1 = FreeCAD.Rotation(m1) m2 = FreeCAD.Matrix() m2.rotateZ(.2) m2.rotateY(.2) m2.move(10,5,-3) r2 = FreeCAD.Rotation(m2) self.assertTrue(r1.isSame(r2, 1e-7), 'Scale on matrix influenced rotation') m3 = FreeCAD.Matrix() m3.scale(-1) r3 = FreeCAD.Rotation(m3) r0 = FreeCAD.Rotation() self.assertTrue(r3.isSame(r0, 1e-7), 'Scale on matrix influenced rotation') m4 = FreeCAD.Matrix() m4.scale(1.25,1.0,0.25) m4.move(4,5,6) r24 = FreeCAD.Rotation(m2*m4) r42 = FreeCAD.Rotation(m4*m2) self.assertTrue(r2.isSame(r24, 1e-7), 'Scale on matrix influenced rotation') self.assertTrue(r2.isSame(r42, 1e-7), 'Scale on matrix influenced rotation') def testRotation(self): r=FreeCAD.Rotation(1,0,0,0) # 180 deg around (1,0,0) self.assertEqual(r.Axis, FreeCAD.Vector(1,0,0)) self.assertAlmostEqual(math.fabs(r.Angle), math.fabs(math.pi)) r=r.multiply(r) # identity self.assertEqual(r.Axis, FreeCAD.Vector(0,0,1)) self.assertAlmostEqual(r.Angle, 0) r=FreeCAD.Rotation(1,0,0,0) r.Q=(0,0,0,1) # update axis and angle s=FreeCAD.Rotation(0,0,0,1) self.assertEqual(r.Axis, s.Axis) self.assertAlmostEqual(r.Angle, s.Angle) self.assertTrue(r.isSame(s)) r=FreeCAD.Rotation(1,0,0,0) r.Matrix=FreeCAD.Matrix() # update axis and angle s=FreeCAD.Rotation(0,0,0,1) self.assertEqual(r.Axis, s.Axis) self.assertAlmostEqual(r.Angle, s.Angle) self.assertTrue(r.isSame(s)) r=FreeCAD.Rotation(1,0,0,0) r.Axes=(FreeCAD.Vector(0,0,1),FreeCAD.Vector(0,0,1)) # update axis and angle s=FreeCAD.Rotation(0,0,0,1) self.assertEqual(r.Axis, s.Axis) self.assertAlmostEqual(r.Angle, s.Angle) self.assertTrue(r.isSame(s)) #add 360 deg to angle r=FreeCAD.Rotation(FreeCAD.Vector(1,0,0),270) s=FreeCAD.Rotation(FreeCAD.Vector(1,0,0),270+360) self.assertEqual(r.Axis, s.Axis) #self.assertAlmostEqual(r.Angle, s.Angle + 2*math.pi) self.assertTrue(r.isSame(s)) #subtract 360 deg from angle using Euler angles r=FreeCAD.Rotation(0,0,180) r.invert() s=FreeCAD.Rotation(0,0,-180) self.assertTrue(r.isSame(s)) #subtract 360 deg from angle using quaternion r=FreeCAD.Rotation(1,0,0,0) s=FreeCAD.Rotation(-1,0,0,0) #angles have the same sign if r.Angle * s.Angle > 0: self.assertEqual(r.Axis, s.Axis*(-1)) else: self.assertAlmostEqual(r.Angle, -s.Angle) self.assertTrue(r.isSame(s)) r.invert() self.assertTrue(r.isSame(s)) # gimbal lock (north pole) r=FreeCAD.Rotation() r.setYawPitchRoll(20, 90, 10) a=r.getYawPitchRoll() s=FreeCAD.Rotation() s.setYawPitchRoll(*a) self.assertAlmostEqual(a[0], 0.0) self.assertAlmostEqual(a[1], 90.0) self.assertAlmostEqual(a[2], -10.0) self.assertTrue(r.isSame(s, 1e-12)) # gimbal lock (south pole) r=FreeCAD.Rotation() r.setYawPitchRoll(20, -90, 10) a=r.getYawPitchRoll() s=FreeCAD.Rotation() s.setYawPitchRoll(*a) self.assertAlmostEqual(a[0], 0.0) self.assertAlmostEqual(a[1], -90.0) self.assertAlmostEqual(a[2], 30.0) self.assertTrue(r.isSame(s, 1e-12)) def testInverted(self): p = FreeCAD.Placement() p.Rotation.Angle = math.pi / 2 self.assertEqual(abs(p.inverse().Rotation.Angle), p.Rotation.Angle) def testYawPitchRoll(self): def getYPR1(yaw, pitch, roll): r = FreeCAD.Rotation() r.setYawPitchRoll(yaw, pitch, roll) return r def getYPR2(yaw, pitch, roll): rx = FreeCAD.Rotation() ry = FreeCAD.Rotation() rz = FreeCAD.Rotation() rx.Axis = FreeCAD.Vector(1,0,0) ry.Axis = FreeCAD.Vector(0,1,0) rz.Axis = FreeCAD.Vector(0,0,1) rx.Angle = math.radians(roll) ry.Angle = math.radians(pitch) rz.Angle = math.radians(yaw) return rz.multiply(ry).multiply(rx) angles = [] angles.append((10,10,10)) angles.append((13,45,-24)) angles.append((10,-90,20)) for i in angles: r = getYPR1(*i) s = getYPR2(*i) self.assertTrue(r.isSame(s, 1e-12)) def testBounding(self): b=FreeCAD.BoundBox() b.setVoid() self.assertFalse(b.isValid(),"Bbox is not invalid") b.add(0,0,0) self.assertTrue(b.isValid(), "Bbox is invalid") self.assertEqual(b.XLength, 0, "X length > 0") self.assertEqual(b.YLength, 0, "Y length > 0") self.assertEqual(b.ZLength, 0, "Z length > 0") self.assertEqual(b.Center, FreeCAD.Vector(0,0,0), "Center is not at (0,0,0)") self.assertTrue(b.isInside(b.Center), "Center is not inside Bbox") b.add(2,2,2) self.assertTrue(b.isInside(b.getIntersectionPoint(b.Center,FreeCAD.Vector(0,1,0))),"Intersection point is not inside Bbox") self.assertTrue(b.intersect(b),"Bbox doesn't intersect with itself") self.assertFalse(b.intersected(FreeCAD.BoundBox(4,4,4,6,6,6)).isValid(),"Bbox should not intersect with Bbox outside") self.assertEqual(b.intersected(FreeCAD.BoundBox(-2,-2,-2,2,2,2)).Center, b.Center,"Bbox is not a full subset") def testMultLeftOrRight(self): doc = FreeCAD.newDocument() obj = doc.addObject("App::FeatureTestPlacement") p1 = Base.Placement() p1.Base = Base.Vector(10, 10, 10) p2 = Base.Placement() p2.Rotation.Angle = math.radians(90) obj.Input1 = p1 obj.Input2 = p2 doc.recompute() self.assertTrue(obj.MultRight.isSame(p1 * p2)) self.assertFalse(obj.MultRight.isSame(p2 * p1)) self.assertTrue(obj.MultLeft.isSame(p2 * p1)) self.assertFalse(obj.MultLeft.isSame(p1 * p2)) FreeCAD.closeDocument(doc.Name) class MatrixTestCase(unittest.TestCase): def setUp(self): self.mat = FreeCAD.Matrix() def testOrder(self): self.mat = FreeCAD.Matrix(1.0,2.0,3.0,4.0) self.assertEqual(self.mat.A11, 1.0) self.assertEqual(self.mat.A12, 2.0) self.assertEqual(self.mat.A13, 3.0) self.assertEqual(self.mat.A14, 4.0) def testScalar(self): res = self.mat * 0.0 for i in range(16): self.assertEqual(res.A[i], 0.0) def testAddition(self): res1 = self.mat * 2.0 res2 = self.mat + self.mat for i in range(16): self.assertEqual(res1.A[i], res2.A[i]) def testMinus(self): res = self.mat - self.mat for i in range(16): self.assertEqual(res.A[i], 0.0) def testVector(self): vec = FreeCAD.Vector(1, 1, 1) vec = self.mat * vec self.assertEqual(vec.x, 1.0) self.assertEqual(vec.y, 1.0) self.assertEqual(vec.z, 1.0) def testVectorMult(self): vec = FreeCAD.Vector(1, 1, 1) with self.assertRaises(TypeError): vec * "string" def testRotation(self): rot = FreeCAD.Rotation() res = self.mat * rot self.assertEqual(type(res), FreeCAD.Matrix) def testPlacement(self): plm = FreeCAD.Placement() res = self.mat * plm self.assertEqual(type(res), FreeCAD.Matrix) def testMatrix(self): mat = FreeCAD.Matrix() res = self.mat * mat self.assertEqual(type(res), FreeCAD.Matrix) def testMatrixPlacementMatrix(self): # Example taken from https://forum.freecadweb.org/viewtopic.php?f=3&t=61000 mat = FreeCAD.Matrix(-0.470847778020266, 0.8150598976807029, 0.3376088628746235, -11.25290913640202, -0.8822144756796808, -0.4350066260577338, -0.180185641360483, -2876.45492562325, 1.955470978815492e-9, -0.3826834326750831, 0.923879538425552, 941.3822018176414) plm = FreeCAD.Placement(mat) mat = plm.toMatrix() self.assertEqual(mat.hasScale(), FreeCAD.ScaleType.NoScaling) def testAnything(self): with self.assertRaises(NotImplementedError): self.mat * "string" def testUnity(self): mat = FreeCAD.Matrix(2,0,0,0, 0,1,0,0, 0,0,2,0, 0,0,0,-1) self.assertFalse(mat.isUnity()) mat.unity() self.assertTrue(mat.isUnity()) def testPower(self): mat = FreeCAD.Matrix(2,0,0,0, 0,1,0,0, 0,0,2,0, 0,0,0,-1) with self.assertRaises(NotImplementedError): mat ** "string" mat2 = mat ** 0 self.assertTrue(mat2.isUnity()) self.assertEqual(mat ** -1, mat.inverse()) self.assertEqual(mat ** 1, mat) self.assertEqual(mat ** 2, mat * mat) self.assertEqual(mat ** 3, mat * mat * mat) mat.nullify() with self.assertRaises(RuntimeError): mat ** -1 def testScale(self): self.mat.scale(1., 2., 3.) self.assertEqual(self.mat.determinant(), 6.0) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.NonUniformLeft) self.mat.unity() self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.NoScaling) self.mat.scale(2., 2., 2.) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.Uniform) self.mat.rotateX(1.0) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.Uniform) self.mat.scale(1., 2., 3.) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.NonUniformLeft) self.mat.unity() self.mat.scale(1., 2., 3.) self.mat.rotateX(1.0) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.NonUniformRight) self.mat.unity() self.mat.setCol(0, FreeCAD.Vector(1,2,3)) self.mat.setCol(1, FreeCAD.Vector(1,2,3)) self.mat.setCol(2, FreeCAD.Vector(1,2,3)) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.Other) self.mat.unity() self.mat.setRow(0, FreeCAD.Vector(1,2,3)) self.mat.setRow(1, FreeCAD.Vector(1,2,3)) self.mat.setRow(2, FreeCAD.Vector(1,2,3)) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.Other) self.mat.unity() self.mat.scale(-1.) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.Uniform) self.mat.scale(-2.) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.Uniform) def testShearing(self): self.mat.setRow(1, FreeCAD.Vector(0,1,1)) self.assertEqual(self.mat.hasScale(), FreeCAD.ScaleType.Other) def testMultLeftOrRight(self): mat1 = FreeCAD.Matrix() mat1.rotateX(1.0) mat2 = FreeCAD.Matrix() mat2.scale(1., 2., 3.) self.assertEqual((mat1 * mat2).hasScale(), FreeCAD.ScaleType.NonUniformRight) self.assertEqual((mat2 * mat1).hasScale(), FreeCAD.ScaleType.NonUniformLeft) def testNull(self): self.assertFalse(self.mat.isNull()) self.mat.nullify() self.assertTrue(self.mat.isNull()) def testUnity(self): self.assertTrue(self.mat.isUnity()) self.mat.nullify() self.assertFalse(self.mat.isUnity()) self.mat.unity() self.assertTrue(self.mat.isUnity()) def testColRow(self): with self.assertRaises(TypeError): self.mat.col("string") with self.assertRaises(TypeError): self.mat.row("string") self.assertEqual(type(self.mat.col(0)), FreeCAD.Vector) self.assertEqual(type(self.mat.row(0)), FreeCAD.Vector) self.mat.setCol(0, FreeCAD.Vector(1,0,0)) self.mat.setRow(0, FreeCAD.Vector(1,0,0)) def testTrace(self): self.mat.scale(2., 2., 2.) self.assertEqual(self.mat.trace(), FreeCAD.Vector(2., 2., 2.)) def testNumberProtocol(self): with self.assertRaises(NotImplementedError): self.mat / 2.0 with self.assertRaises(NotImplementedError): self.mat % 2.0 with self.assertRaises(NotImplementedError): divmod(self.mat, 2.0) with self.assertRaises(NotImplementedError): float(self.mat) with self.assertRaises(NotImplementedError): int(self.mat) with self.assertRaises(NotImplementedError): self.mat | self.mat with self.assertRaises(NotImplementedError): self.mat & self.mat with self.assertRaises(NotImplementedError): self.mat ^ self.mat with self.assertRaises(NotImplementedError): self.mat << 2 with self.assertRaises(NotImplementedError): self.mat >> 2 with self.assertRaises(NotImplementedError): ~self.mat with self.assertRaises(NotImplementedError): abs(self.mat) self.assertEqual(+self.mat, self.mat) self.assertEqual(-self.mat, self.mat * -1) self.assertTrue(bool(self.mat))