| 1 | #!/usr/bin/python |
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| 2 | # ================================================================== |
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| 3 | # python script for Geant4Py test |
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| 4 | # |
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| 5 | # gtest06 |
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| 6 | # - test for constructing/visualizing boolean geoemtries |
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| 7 | # ================================================================== |
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| 8 | from Geant4 import * |
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| 9 | import g4py.ExN01pl, g4py.ParticleGun |
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| 10 | |
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| 11 | # ================================================================== |
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| 12 | # user actions in python |
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| 13 | # ================================================================== |
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| 14 | class MyDetectorConstruction(G4VUserDetectorConstruction): |
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| 15 | "My Detector Construction" |
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| 16 | |
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| 17 | def __init__(self): |
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| 18 | G4VUserDetectorConstruction.__init__(self) |
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| 19 | self.air= gNistManager.FindOrBuildMaterial("G4_AIR") |
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| 20 | self.lv_object= None |
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| 21 | self.world= self.ConstructWorld() |
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| 22 | |
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| 23 | self.va_red= G4VisAttributes(G4Color(1.,0.,0.)) |
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| 24 | self.va_cyan= G4VisAttributes(G4Color(0.,1.,1.)) |
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| 25 | self.va_green= G4VisAttributes(G4Color(0.,1.,0.)) |
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| 26 | self.va_blue= G4VisAttributes(G4Color(0.,0.,1.)) |
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| 27 | self.va_magenta= G4VisAttributes(G4Color(1.,0.,1.)) |
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| 28 | |
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| 29 | self.sld_box= G4Box("box",20.*cm, 20.*cm, 20.*cm); |
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| 30 | self.sld_cyl= G4Tubs("cylinder",0., 10.*cm, 30.*cm, 0., twopi) |
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| 31 | |
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| 32 | # ----------------------------------------------------------------- |
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| 33 | def ConstructWorld(self): |
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| 34 | # Python has automatic garbage collection system. |
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| 35 | # Geometry objects must be defined as GLOBAL not to be deleted. |
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| 36 | global sld_world, lv_world, pv_world, va_world |
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| 37 | |
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| 38 | sld_world= G4Box("world", 1.*m, 1.*m, 1.*m) |
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| 39 | lv_world= G4LogicalVolume(sld_world, self.air, "world") |
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| 40 | pv_world= G4PVPlacement(G4Transform3D(), lv_world, "world", |
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| 41 | None, False, 0) |
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| 42 | |
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| 43 | va_world= G4VisAttributes() |
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| 44 | va_world.SetVisibility(False) |
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| 45 | lv_world.SetVisAttributes(va_world) |
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| 46 | |
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| 47 | # solid object (dummy) |
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| 48 | global sld_sld, lv_sld, pv_sld |
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| 49 | sld_sld= G4Box("dummy", 10.*cm, 10.*cm, 10.*cm) |
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| 50 | self.lv_object= lv_sld= G4LogicalVolume(sld_sld, self.air, "dummy") |
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| 51 | pv_sld= G4PVPlacement(None, G4ThreeVector(), "dummy", lv_sld, |
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| 52 | pv_world, False, 0) |
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| 53 | |
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| 54 | return pv_world |
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| 55 | |
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| 56 | # ----------------------------------------------------------------- |
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| 57 | def ConstructUnion(self): |
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| 58 | global sld_union |
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| 59 | sld_union= G4UnionSolid("box+cylinder", self.sld_box, self.sld_cyl); |
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| 60 | |
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| 61 | self.lv_object.SetSolid(sld_union) |
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| 62 | self.lv_object.SetVisAttributes(self.va_blue) |
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| 63 | gRunManager.GeometryHasBeenModified() |
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| 64 | |
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| 65 | # ----------------------------------------------------------------- |
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| 66 | def ConstructIntersection(self): |
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| 67 | offset= G4ThreeVector(20.*cm, 20.*cm, 0.) |
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| 68 | global sld_intersection |
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| 69 | sld_intersection= G4IntersectionSolid("box*cylinder", |
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| 70 | self.sld_box, self.sld_cyl, |
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| 71 | None, offset) |
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| 72 | |
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| 73 | self.lv_object.SetSolid(sld_intersection) |
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| 74 | self.lv_object.SetVisAttributes(self.va_magenta) |
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| 75 | gRunManager.GeometryHasBeenModified() |
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| 76 | |
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| 77 | # ----------------------------------------------------------------- |
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| 78 | def ConstructSubtraction(self): |
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| 79 | global sld_subtraction |
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| 80 | sld_subtraction= G4SubtractionSolid("box-cylinder", |
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| 81 | self.sld_box, self.sld_cyl) |
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| 82 | |
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| 83 | self.lv_object.SetSolid(sld_subtraction) |
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| 84 | self.lv_object.SetVisAttributes(self.va_red) |
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| 85 | gRunManager.GeometryHasBeenModified() |
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| 86 | |
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| 87 | # ----------------------------------------------------------------- |
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| 88 | def Construct(self): # return the world volume |
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| 89 | return self.world |
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| 90 | |
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| 91 | # ================================================================== |
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| 92 | # main |
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| 93 | # ================================================================== |
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| 94 | # set geometry |
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| 95 | myDC= MyDetectorConstruction() |
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| 96 | gRunManager.SetUserInitialization(myDC) |
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| 97 | |
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| 98 | # minimal physics list |
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| 99 | g4py.ExN01pl.Construct() |
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| 100 | |
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| 101 | # set primary generator action |
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| 102 | g4py.ParticleGun.Construct() |
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| 103 | |
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| 104 | # initialize |
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| 105 | gRunManager.Initialize() |
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| 106 | |
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| 107 | # visualization |
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| 108 | gApplyUICommand("/vis/open RayTracer") |
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| 109 | gApplyUICommand("/vis/rayTracer/headAngle 40.") |
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| 110 | gApplyUICommand("/vis/rayTracer/eyePosition 100 100 150 cm") |
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| 111 | |
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| 112 | # create a vrml file for each solid type |
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| 113 | f_list= ( |
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| 114 | ("union", myDC.ConstructUnion), |
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| 115 | ("intersection", myDC.ConstructIntersection), |
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| 116 | ("subtraction", myDC.ConstructSubtraction) |
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| 117 | ) |
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| 118 | |
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| 119 | |
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| 120 | for s,f in f_list: |
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| 121 | f.__call__() |
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| 122 | fname= "%s.jpg" % (s) |
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| 123 | cmdstr= "/vis/rayTracer/trace " + fname |
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| 124 | gApplyUICommand(cmdstr) |
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| 125 | |
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| 126 | |
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