[529] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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[593] | 27 | // $Id: G4OpenGLViewer.cc,v 1.34 2007/05/24 18:27:13 allison Exp $ |
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[632] | 28 | // GEANT4 tag $Name: $ |
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[529] | 29 | // |
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| 30 | // |
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| 31 | // Andrew Walkden 27th March 1996 |
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| 32 | // OpenGL view - opens window, hard copy, etc. |
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| 33 | |
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| 34 | #ifdef G4VIS_BUILD_OPENGL_DRIVER |
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| 35 | |
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| 36 | #include "G4ios.hh" |
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| 37 | #include "G4OpenGLViewer.hh" |
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| 38 | #include "G4OpenGLSceneHandler.hh" |
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| 39 | #include "G4OpenGLTransform3D.hh" |
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| 40 | |
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| 41 | #include "G4Scene.hh" |
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| 42 | #include "G4VisExtent.hh" |
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| 43 | #include "G4LogicalVolume.hh" |
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| 44 | #include "G4VSolid.hh" |
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| 45 | #include "G4Point3D.hh" |
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| 46 | #include "G4Normal3D.hh" |
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| 47 | #include "G4Plane3D.hh" |
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[593] | 48 | #include "G4AttHolder.hh" |
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| 49 | #include "G4AttCheck.hh" |
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| 50 | #include <sstream> |
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[529] | 51 | |
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[593] | 52 | static const char* gouraudtriangleEPS[] = |
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| 53 | { |
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| 54 | "/bd{bind def}bind def /triangle { aload pop setrgbcolor aload pop 5 3", |
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| 55 | "roll 4 2 roll 3 2 roll exch moveto lineto lineto closepath fill } bd", |
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| 56 | "/computediff1 { 2 copy sub abs threshold ge {pop pop pop true} { exch 2", |
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| 57 | "index sub abs threshold ge { pop pop true} { sub abs threshold ge } ifelse", |
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| 58 | "} ifelse } bd /computediff3 { 3 copy 0 get 3 1 roll 0 get 3 1 roll 0 get", |
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| 59 | "computediff1 {true} { 3 copy 1 get 3 1 roll 1 get 3 1 roll 1 get", |
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| 60 | "computediff1 {true} { 3 copy 2 get 3 1 roll 2 get 3 1 roll 2 get", |
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| 61 | "computediff1 } ifelse } ifelse } bd /middlecolor { aload pop 4 -1 roll", |
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| 62 | "aload pop 4 -1 roll add 2 div 5 1 roll 3 -1 roll add 2 div 3 1 roll add 2", |
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| 63 | "div 3 1 roll exch 3 array astore } bd /gouraudtriangle { computediff3 { 4", |
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| 64 | "-1 roll aload 7 1 roll 6 -1 roll pop 3 -1 roll pop add 2 div 3 1 roll add", |
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| 65 | "2 div exch 3 -1 roll aload 7 1 roll exch pop 4 -1 roll pop add 2 div 3 1", |
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| 66 | "roll add 2 div exch 3 -1 roll aload 7 1 roll pop 3 -1 roll pop add 2 div 3", |
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| 67 | "1 roll add 2 div exch 7 3 roll 10 -3 roll dup 3 index middlecolor 4 1 roll", |
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| 68 | "2 copy middlecolor 4 1 roll 3 copy pop middlecolor 4 1 roll 13 -1 roll", |
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| 69 | "aload pop 17 index 6 index 15 index 19 index 6 index 17 index 6 array", |
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| 70 | "astore 10 index 10 index 14 index gouraudtriangle 17 index 5 index 17", |
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| 71 | "index 19 index 5 index 19 index 6 array astore 10 index 9 index 13 index", |
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| 72 | "gouraudtriangle 13 index 16 index 5 index 15 index 18 index 5 index 6", |
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| 73 | "array astore 12 index 12 index 9 index gouraudtriangle 17 index 16 index", |
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| 74 | "15 index 19 index 18 index 17 index 6 array astore 10 index 12 index 14", |
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| 75 | "index gouraudtriangle 18 {pop} repeat } { aload pop 5 3 roll aload pop 7 3", |
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| 76 | "roll aload pop 9 3 roll 4 index 6 index 4 index add add 3 div 10 1 roll 7", |
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| 77 | "index 5 index 3 index add add 3 div 10 1 roll 6 index 4 index 2 index add", |
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| 78 | "add 3 div 10 1 roll 9 {pop} repeat 3 array astore triangle } ifelse } bd", |
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| 79 | NULL |
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| 80 | }; |
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| 81 | |
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[529] | 82 | G4OpenGLViewer::G4OpenGLViewer (G4OpenGLSceneHandler& scene): |
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| 83 | G4VViewer (scene, -1), |
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[593] | 84 | pointSize (0), |
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| 85 | print_colour (true), |
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| 86 | vectored_ps (true), |
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| 87 | fOpenGLSceneHandler(scene), |
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[529] | 88 | background (G4Colour(0.,0.,0.)), |
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| 89 | transparency_enabled (true), |
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| 90 | antialiasing_enabled (false), |
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| 91 | haloing_enabled (false), |
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[593] | 92 | fStartTime(-G4OPENGL_DBL_MAX), |
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| 93 | fEndTime(G4OPENGL_DBL_MAX), |
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[529] | 94 | fFadeFactor(0.), |
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| 95 | fDisplayHeadTime(false), |
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| 96 | fDisplayHeadTimeX(-0.9), |
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| 97 | fDisplayHeadTimeY(-0.9), |
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| 98 | fDisplayHeadTimeSize(24.), |
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| 99 | fDisplayHeadTimeRed(0.), |
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| 100 | fDisplayHeadTimeGreen(1.), |
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| 101 | fDisplayHeadTimeBlue(1.), |
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| 102 | fDisplayLightFront(false), |
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| 103 | fDisplayLightFrontX(0.), |
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| 104 | fDisplayLightFrontY(0.), |
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| 105 | fDisplayLightFrontZ(0.), |
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| 106 | fDisplayLightFrontT(0.), |
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| 107 | fDisplayLightFrontRed(0.), |
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| 108 | fDisplayLightFrontGreen(1.), |
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| 109 | fDisplayLightFrontBlue(0.) |
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| 110 | { |
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| 111 | // Make changes to view parameters for OpenGL... |
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| 112 | fVP.SetAutoRefresh(true); |
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| 113 | fDefaultVP.SetAutoRefresh(true); |
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| 114 | |
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| 115 | // glClearColor (0.0, 0.0, 0.0, 0.0); |
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| 116 | // glClearDepth (1.0); |
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| 117 | // glDisable (GL_BLEND); |
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| 118 | // glDisable (GL_LINE_SMOOTH); |
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| 119 | // glDisable (GL_POLYGON_SMOOTH); |
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| 120 | |
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[593] | 121 | strcpy (print_string, "G4OpenGL.eps"); |
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[529] | 122 | } |
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| 123 | |
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| 124 | G4OpenGLViewer::~G4OpenGLViewer () {} |
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| 125 | |
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| 126 | void G4OpenGLViewer::InitializeGLView () |
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| 127 | { |
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| 128 | glClearColor (0.0, 0.0, 0.0, 0.0); |
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| 129 | glClearDepth (1.0); |
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| 130 | glDisable (GL_BLEND); |
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| 131 | glDisable (GL_LINE_SMOOTH); |
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| 132 | glDisable (GL_POLYGON_SMOOTH); |
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| 133 | } |
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| 134 | |
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| 135 | void G4OpenGLViewer::ClearView () { |
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| 136 | glClearColor (background.GetRed(), |
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| 137 | background.GetGreen(), |
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| 138 | background.GetBlue(), |
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| 139 | 1.); |
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| 140 | glClearDepth (1.0); |
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| 141 | //Below line does not compile with Mesa includes. |
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| 142 | //glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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| 143 | glClear (GL_COLOR_BUFFER_BIT); |
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| 144 | glClear (GL_DEPTH_BUFFER_BIT); |
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| 145 | glClear (GL_STENCIL_BUFFER_BIT); |
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| 146 | glFlush (); |
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| 147 | } |
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| 148 | |
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| 149 | void G4OpenGLViewer::SetView () { |
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| 150 | |
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| 151 | // Calculates view representation based on extent of object being |
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| 152 | // viewed and (initial) viewpoint. (Note: it can change later due |
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| 153 | // to user interaction via visualization system's GUI.) |
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| 154 | |
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| 155 | // Lighting. |
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| 156 | GLfloat lightPosition [4]; |
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| 157 | lightPosition [0] = fVP.GetActualLightpointDirection().x(); |
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| 158 | lightPosition [1] = fVP.GetActualLightpointDirection().y(); |
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| 159 | lightPosition [2] = fVP.GetActualLightpointDirection().z(); |
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| 160 | lightPosition [3] = 0.; |
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| 161 | // Light position is "true" light direction, so must come after gluLookAt. |
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| 162 | GLfloat ambient [] = { 0.2, 0.2, 0.2, 1.}; |
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| 163 | GLfloat diffuse [] = { 0.8, 0.8, 0.8, 1.}; |
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| 164 | glEnable (GL_LIGHT0); |
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| 165 | glLightfv (GL_LIGHT0, GL_AMBIENT, ambient); |
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| 166 | glLightfv (GL_LIGHT0, GL_DIFFUSE, diffuse); |
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| 167 | |
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| 168 | // Get radius of scene, etc. |
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| 169 | // Note that this procedure properly takes into account zoom, dolly and pan. |
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| 170 | const G4Point3D targetPoint |
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| 171 | = fSceneHandler.GetScene()->GetStandardTargetPoint() |
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| 172 | + fVP.GetCurrentTargetPoint (); |
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| 173 | G4double radius = fSceneHandler.GetScene()->GetExtent().GetExtentRadius(); |
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| 174 | if(radius<=0.) radius = 1.; |
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| 175 | const G4double cameraDistance = fVP.GetCameraDistance (radius); |
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| 176 | const G4Point3D cameraPosition = |
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| 177 | targetPoint + cameraDistance * fVP.GetViewpointDirection().unit(); |
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| 178 | const GLdouble pnear = fVP.GetNearDistance (cameraDistance, radius); |
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| 179 | const GLdouble pfar = fVP.GetFarDistance (cameraDistance, pnear, radius); |
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| 180 | const GLdouble right = fVP.GetFrontHalfHeight (pnear, radius); |
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| 181 | const GLdouble left = -right; |
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| 182 | const GLdouble bottom = left; |
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| 183 | const GLdouble top = right; |
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| 184 | |
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| 185 | glMatrixMode (GL_PROJECTION); // set up Frustum. |
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| 186 | glLoadIdentity(); |
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| 187 | |
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| 188 | const G4Vector3D scale = fVP.GetScaleFactor(); |
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| 189 | glScaled(scale.x(),scale.y(),scale.z()); |
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| 190 | |
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| 191 | if (fVP.GetFieldHalfAngle() == 0.) { |
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| 192 | glOrtho (left, right, bottom, top, pnear, pfar); |
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| 193 | } |
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| 194 | else { |
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| 195 | glFrustum (left, right, bottom, top, pnear, pfar); |
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| 196 | } |
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| 197 | |
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| 198 | glMatrixMode (GL_MODELVIEW); // apply further transformations to scene. |
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| 199 | glLoadIdentity(); |
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| 200 | |
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| 201 | const G4Normal3D& upVector = fVP.GetUpVector (); |
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| 202 | G4Point3D gltarget; |
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| 203 | if (cameraDistance > 1.e-6 * radius) { |
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| 204 | gltarget = targetPoint; |
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| 205 | } |
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| 206 | else { |
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| 207 | gltarget = targetPoint - radius * fVP.GetViewpointDirection().unit(); |
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| 208 | } |
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| 209 | |
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| 210 | const G4Point3D& pCamera = cameraPosition; // An alias for brevity. |
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| 211 | gluLookAt (pCamera.x(), pCamera.y(), pCamera.z(), // Viewpoint. |
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| 212 | gltarget.x(), gltarget.y(), gltarget.z(), // Target point. |
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| 213 | upVector.x(), upVector.y(), upVector.z()); // Up vector. |
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| 214 | |
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| 215 | // Light position is "true" light direction, so must come after gluLookAt. |
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| 216 | glLightfv (GL_LIGHT0, GL_POSITION, lightPosition); |
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| 217 | |
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| 218 | // OpenGL no longer seems to reconstruct clipped edges, so, when the |
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| 219 | // BooleanProcessor is up to it, abandon this and use generic |
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| 220 | // clipping in G4OpenGLSceneHandler::CreateSectionPolyhedron. Also, |
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| 221 | // force kernel visit on change of clipping plane in |
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| 222 | // G4OpenGLStoredViewer::CompareForKernelVisit. |
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| 223 | if (fVP.IsSection () ) { // pair of back to back clip planes. |
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| 224 | const G4Plane3D& s = fVP.GetSectionPlane (); |
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| 225 | double sArray[4]; |
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| 226 | sArray[0] = s.a(); |
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| 227 | sArray[1] = s.b(); |
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| 228 | sArray[2] = s.c(); |
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| 229 | sArray[3] = s.d() + radius * 1.e-05; |
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| 230 | glClipPlane (GL_CLIP_PLANE0, sArray); |
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| 231 | glEnable (GL_CLIP_PLANE0); |
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| 232 | sArray[0] = -s.a(); |
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| 233 | sArray[1] = -s.b(); |
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| 234 | sArray[2] = -s.c(); |
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| 235 | sArray[3] = -s.d() + radius * 1.e-05; |
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| 236 | glClipPlane (GL_CLIP_PLANE1, sArray); |
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| 237 | glEnable (GL_CLIP_PLANE1); |
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| 238 | } else { |
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| 239 | glDisable (GL_CLIP_PLANE0); |
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| 240 | glDisable (GL_CLIP_PLANE1); |
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| 241 | } |
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| 242 | |
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| 243 | const G4Planes& cutaways = fVP.GetCutawayPlanes(); |
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| 244 | size_t nPlanes = cutaways.size(); |
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| 245 | if (fVP.IsCutaway() && |
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| 246 | fVP.GetCutawayMode() == G4ViewParameters::cutawayIntersection && |
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| 247 | nPlanes > 0) { |
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| 248 | double a[4]; |
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| 249 | a[0] = cutaways[0].a(); |
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| 250 | a[1] = cutaways[0].b(); |
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| 251 | a[2] = cutaways[0].c(); |
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| 252 | a[3] = cutaways[0].d(); |
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| 253 | glClipPlane (GL_CLIP_PLANE2, a); |
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| 254 | glEnable (GL_CLIP_PLANE2); |
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| 255 | if (nPlanes > 1) { |
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| 256 | a[0] = cutaways[1].a(); |
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| 257 | a[1] = cutaways[1].b(); |
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| 258 | a[2] = cutaways[1].c(); |
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| 259 | a[3] = cutaways[1].d(); |
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| 260 | glClipPlane (GL_CLIP_PLANE3, a); |
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| 261 | glEnable (GL_CLIP_PLANE3); |
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| 262 | } |
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| 263 | if (nPlanes > 2) { |
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| 264 | a[0] = cutaways[2].a(); |
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| 265 | a[1] = cutaways[2].b(); |
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| 266 | a[2] = cutaways[2].c(); |
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| 267 | a[3] = cutaways[2].d(); |
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| 268 | glClipPlane (GL_CLIP_PLANE4, a); |
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| 269 | glEnable (GL_CLIP_PLANE4); |
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| 270 | } |
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| 271 | } else { |
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| 272 | glDisable (GL_CLIP_PLANE2); |
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| 273 | glDisable (GL_CLIP_PLANE3); |
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| 274 | glDisable (GL_CLIP_PLANE4); |
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| 275 | } |
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| 276 | |
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| 277 | // Background. |
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| 278 | background = fVP.GetBackgroundColour (); |
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| 279 | |
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| 280 | } |
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| 281 | |
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| 282 | void G4OpenGLViewer::HaloingFirstPass () { |
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| 283 | |
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| 284 | //To perform haloing, first Draw all information to the depth buffer |
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| 285 | //alone, using a chunky line width, and then Draw all info again, to |
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| 286 | //the colour buffer, setting a thinner line width an the depth testing |
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| 287 | //function to less than or equal, so if two lines cross, the one |
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| 288 | //passing behind the other will not pass the depth test, and so not |
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| 289 | //get rendered either side of the infront line for a short distance. |
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| 290 | |
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| 291 | //First, disable writing to the colo(u)r buffer... |
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| 292 | glColorMask (GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); |
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| 293 | |
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| 294 | //Now enable writing to the depth buffer... |
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| 295 | glDepthMask (GL_TRUE); |
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| 296 | glDepthFunc (GL_LESS); |
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| 297 | glClearDepth (1.0); |
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| 298 | |
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| 299 | //Finally, set the line width to something wide... |
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| 300 | glLineWidth (3.0); |
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| 301 | |
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| 302 | } |
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| 303 | |
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| 304 | void G4OpenGLViewer::HaloingSecondPass () { |
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| 305 | |
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| 306 | //And finally, turn the colour buffer back on with a sesible line width... |
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| 307 | glColorMask (GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); |
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| 308 | glDepthFunc (GL_LEQUAL); |
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| 309 | glLineWidth (1.0); |
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| 310 | |
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| 311 | } |
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| 312 | |
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[593] | 313 | void G4OpenGLViewer::Pick(GLdouble x, GLdouble y) |
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| 314 | { |
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| 315 | //G4cout << "X: " << x << ", Y: " << y << G4endl; |
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| 316 | const G4int BUFSIZE = 512; |
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| 317 | GLuint selectBuffer[BUFSIZE]; |
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| 318 | glSelectBuffer(BUFSIZE, selectBuffer); |
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| 319 | glRenderMode(GL_SELECT); |
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| 320 | glInitNames(); |
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| 321 | glPushName(0); |
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| 322 | glMatrixMode(GL_PROJECTION); |
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| 323 | G4double currentProjectionMatrix[16]; |
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| 324 | glGetDoublev(GL_PROJECTION_MATRIX, currentProjectionMatrix); |
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| 325 | glPushMatrix(); |
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| 326 | glLoadIdentity(); |
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| 327 | GLint viewport[4]; |
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| 328 | glGetIntegerv(GL_VIEWPORT, viewport); |
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| 329 | // Define 5x5 pixel pick area |
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| 330 | gluPickMatrix(x, viewport[3] - y, 5., 5., viewport); |
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| 331 | glMultMatrixd(currentProjectionMatrix); |
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| 332 | glMatrixMode(GL_MODELVIEW); |
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| 333 | DrawView(); |
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| 334 | GLint hits = glRenderMode(GL_RENDER); |
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| 335 | if (hits < 0) |
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| 336 | G4cout << "Too many hits. Zoom in to reduce overlaps." << G4cout; |
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| 337 | else if (hits > 0) { |
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| 338 | //G4cout << hits << " hit(s)" << G4endl; |
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| 339 | GLuint* p = selectBuffer; |
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| 340 | for (GLint i = 0; i < hits; ++i) { |
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| 341 | GLuint nnames = *p++; |
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| 342 | *p++; //OR GLuint zmin = *p++; |
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| 343 | *p++; //OR GLuint zmax = *p++; |
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| 344 | //G4cout << "Hit " << i << ": " << nnames << " names" |
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| 345 | // << "\nzmin: " << zmin << ", zmax: " << zmax << G4endl; |
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| 346 | for (GLuint j = 0; j < nnames; ++j) { |
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| 347 | GLuint name = *p++; |
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| 348 | //G4cout << "Name " << j << ": PickName: " << name << G4endl; |
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| 349 | std::map<GLuint, G4AttHolder*>::iterator iter = |
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| 350 | fOpenGLSceneHandler.fPickMap.find(name); |
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| 351 | if (iter != fOpenGLSceneHandler.fPickMap.end()) { |
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| 352 | G4AttHolder* attHolder = iter->second; |
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| 353 | if(attHolder && attHolder->GetAttDefs().size()) { |
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| 354 | for (size_t i = 0; i < attHolder->GetAttDefs().size(); ++i) { |
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| 355 | G4cout << G4AttCheck(attHolder->GetAttValues()[i], |
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| 356 | attHolder->GetAttDefs()[i]); |
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| 357 | } |
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| 358 | } |
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| 359 | } |
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| 360 | } |
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| 361 | G4cout << G4endl; |
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| 362 | } |
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| 363 | } |
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| 364 | glMatrixMode(GL_PROJECTION); |
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| 365 | glPopMatrix(); |
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| 366 | glMatrixMode(GL_MODELVIEW); |
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| 367 | } |
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| 368 | |
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| 369 | void G4OpenGLViewer::print() { |
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| 370 | |
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| 371 | // Print vectored PostScript |
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| 372 | |
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| 373 | G4int size = 5000000; |
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| 374 | |
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| 375 | GLfloat* feedback_buffer; |
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| 376 | GLint returned; |
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| 377 | FILE* file; |
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| 378 | |
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| 379 | feedback_buffer = new GLfloat[size]; |
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| 380 | glFeedbackBuffer (size, GL_3D_COLOR, feedback_buffer); |
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| 381 | glRenderMode (GL_FEEDBACK); |
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| 382 | |
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| 383 | DrawView(); |
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| 384 | returned = glRenderMode (GL_RENDER); |
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| 385 | |
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| 386 | if (print_string) { |
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| 387 | file = fopen (print_string, "w"); |
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| 388 | if (file) { |
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| 389 | spewWireframeEPS (file, returned, feedback_buffer, "rendereps"); |
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| 390 | } else { |
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| 391 | printf("Could not open %s\n", print_string); |
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| 392 | } |
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| 393 | } else { |
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| 394 | printBuffer (returned, feedback_buffer); |
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| 395 | } |
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| 396 | |
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| 397 | delete[] feedback_buffer; |
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| 398 | } |
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| 399 | |
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| 400 | void G4OpenGLViewer::print3DcolorVertex(GLint size, GLint * count, GLfloat * buffer) |
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| 401 | { |
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| 402 | G4int i; |
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| 403 | |
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| 404 | printf(" "); |
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| 405 | for (i = 0; i < 7; i++) { |
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| 406 | printf("%4.2f ", buffer[size - (*count)]); |
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| 407 | *count = *count - 1; |
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| 408 | } |
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| 409 | printf("\n"); |
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| 410 | } |
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| 411 | |
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| 412 | void G4OpenGLViewer::spewWireframeEPS (FILE* file, GLint size, GLfloat* buffer, const char* cr) { |
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| 413 | |
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| 414 | GLfloat EPS_GOURAUD_THRESHOLD=0.1; |
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| 415 | |
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| 416 | GLfloat clearColor[4], viewport[4]; |
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| 417 | GLfloat lineWidth; |
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| 418 | G4int i; |
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| 419 | |
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| 420 | glGetFloatv (GL_VIEWPORT, viewport); |
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| 421 | glGetFloatv (GL_COLOR_CLEAR_VALUE, clearColor); |
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| 422 | glGetFloatv (GL_LINE_WIDTH, &lineWidth); |
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| 423 | glGetFloatv (GL_POINT_SIZE, &pointSize); |
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| 424 | |
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| 425 | fputs ("%!PS-Adobe-2.0 EPSF-2.0\n", file); |
---|
| 426 | fprintf (file, "%%%%Creator: %s (using OpenGL feedback)\n", cr); |
---|
| 427 | fprintf (file, "%%%%BoundingBox: %g %g %g %g\n", viewport[0], viewport[1], viewport[2], viewport[3]); |
---|
| 428 | fputs ("%%EndComments\n", file); |
---|
| 429 | fputs ("\n", file); |
---|
| 430 | fputs ("gsave\n", file); |
---|
| 431 | fputs ("\n", file); |
---|
| 432 | |
---|
| 433 | fputs ("% the gouraudtriangle PostScript fragment below is free\n", file); |
---|
| 434 | fputs ("% written by Frederic Delhoume (delhoume@ilog.fr)\n", file); |
---|
| 435 | fprintf (file, "/threshold %g def\n", EPS_GOURAUD_THRESHOLD); |
---|
| 436 | for (i=0; gouraudtriangleEPS[i]; i++) { |
---|
| 437 | fprintf (file, "%s\n", gouraudtriangleEPS[i]); |
---|
| 438 | } |
---|
| 439 | |
---|
| 440 | fprintf(file, "\n%g setlinewidth\n", lineWidth); |
---|
| 441 | |
---|
| 442 | fprintf (file, "%g %g %g setrgbcolor\n", clearColor[0], clearColor[1], clearColor[2]); |
---|
| 443 | fprintf (file, "%g %g %g %g rectfill\n\n", viewport[0], viewport[1], viewport[2], viewport[3]); |
---|
| 444 | |
---|
| 445 | spewSortedFeedback (file, size, buffer); |
---|
| 446 | |
---|
| 447 | fputs ("grestore\n\n", file); |
---|
| 448 | fputs ("showpage\n", file); |
---|
| 449 | |
---|
| 450 | fclose(file); |
---|
| 451 | } |
---|
| 452 | |
---|
| 453 | void G4OpenGLViewer::printBuffer (GLint size, GLfloat* buffer) { |
---|
| 454 | |
---|
| 455 | GLint count; |
---|
| 456 | G4int token, nvertices; |
---|
| 457 | |
---|
| 458 | count=size; |
---|
| 459 | while(count) { |
---|
| 460 | token=G4int (buffer[size-count]); |
---|
| 461 | count--; |
---|
| 462 | switch (token) { |
---|
| 463 | |
---|
| 464 | case GL_PASS_THROUGH_TOKEN: |
---|
| 465 | printf ("GL_PASS_THROUGH_TOKEN\n"); |
---|
| 466 | printf (" %4.2f\n", buffer[size-count]); |
---|
| 467 | count--; |
---|
| 468 | break; |
---|
| 469 | |
---|
| 470 | case GL_POINT_TOKEN: |
---|
| 471 | printf ("GL_POINT_TOKEN\n"); |
---|
| 472 | print3DcolorVertex (size, &count, buffer); |
---|
| 473 | break; |
---|
| 474 | |
---|
| 475 | case GL_LINE_TOKEN: |
---|
| 476 | printf ("GL_LINE_TOKEN\n"); |
---|
| 477 | print3DcolorVertex (size, &count, buffer); |
---|
| 478 | print3DcolorVertex (size, &count, buffer); |
---|
| 479 | break; |
---|
| 480 | |
---|
| 481 | case GL_LINE_RESET_TOKEN: |
---|
| 482 | printf ("GL_LINE_RESET_TOKEN\n"); |
---|
| 483 | print3DcolorVertex (size, &count, buffer); |
---|
| 484 | print3DcolorVertex (size, &count, buffer); |
---|
| 485 | break; |
---|
| 486 | |
---|
| 487 | case GL_POLYGON_TOKEN: |
---|
| 488 | printf ("GL_POLYGON_TOKEN\n"); |
---|
| 489 | nvertices=G4int (buffer[size-count]); |
---|
| 490 | count--; |
---|
| 491 | for (; nvertices>0; nvertices--) { |
---|
| 492 | print3DcolorVertex (size, &count, buffer); |
---|
| 493 | } |
---|
| 494 | } |
---|
| 495 | } |
---|
| 496 | } |
---|
| 497 | |
---|
| 498 | G4float* G4OpenGLViewer::spewPrimitiveEPS (FILE* file, GLfloat* loc) { |
---|
| 499 | |
---|
| 500 | G4int token; |
---|
| 501 | G4int nvertices, i; |
---|
| 502 | GLfloat red, green, blue, intensity; |
---|
| 503 | G4int smooth; |
---|
| 504 | GLfloat dx, dy, dr, dg, db, absR, absG, absB, colormax; |
---|
| 505 | G4int steps; |
---|
| 506 | Feedback3Dcolor *vertex; |
---|
| 507 | GLfloat xstep(0.), ystep(0.), rstep(0.), gstep(0.), bstep(0.); |
---|
| 508 | GLfloat xnext(0.), ynext(0.), rnext(0.), gnext(0.), bnext(0.), distance(0.); |
---|
| 509 | |
---|
| 510 | token=G4int (*loc); |
---|
| 511 | loc++; |
---|
| 512 | switch (token) { |
---|
| 513 | case GL_LINE_RESET_TOKEN: |
---|
| 514 | case GL_LINE_TOKEN: |
---|
| 515 | vertex=(Feedback3Dcolor*)loc; |
---|
| 516 | dr=vertex[1].red - vertex[0].red; |
---|
| 517 | dg=vertex[1].green - vertex[0].green; |
---|
| 518 | db=vertex[1].blue - vertex[0].blue; |
---|
| 519 | |
---|
| 520 | if (!print_colour) { |
---|
| 521 | dr+=(dg+db); |
---|
| 522 | dr/=3.0; |
---|
| 523 | dg=dr; |
---|
| 524 | db=dr; |
---|
| 525 | } |
---|
| 526 | |
---|
| 527 | if (dr!=0 || dg!=0 || db!=0) { |
---|
| 528 | dx=vertex[1].x - vertex[0].x; |
---|
| 529 | dy=vertex[1].y - vertex[0].y; |
---|
| 530 | distance=std::sqrt(dx*dx + dy*dy); |
---|
| 531 | |
---|
| 532 | absR=std::fabs(dr); |
---|
| 533 | absG=std::fabs(dg); |
---|
| 534 | absB=std::fabs(db); |
---|
| 535 | |
---|
| 536 | #define Max(a, b) (((a)>(b))?(a):(b)) |
---|
| 537 | |
---|
| 538 | #define EPS_SMOOTH_LINE_FACTOR 0.06 |
---|
| 539 | |
---|
| 540 | colormax=Max(absR, Max(absG, absB)); |
---|
| 541 | steps=Max(1, G4int (colormax*distance*EPS_SMOOTH_LINE_FACTOR)); |
---|
| 542 | |
---|
| 543 | xstep=dx/steps; |
---|
| 544 | ystep=dy/steps; |
---|
| 545 | |
---|
| 546 | rstep=dr/steps; |
---|
| 547 | gstep=dg/steps; |
---|
| 548 | bstep=db/steps; |
---|
| 549 | |
---|
| 550 | xnext=vertex[0].x; |
---|
| 551 | ynext=vertex[0].y; |
---|
| 552 | rnext=vertex[0].red; |
---|
| 553 | gnext=vertex[0].green; |
---|
| 554 | bnext=vertex[0].blue; |
---|
| 555 | |
---|
| 556 | if (!print_colour) { |
---|
| 557 | rnext+=(gnext+bnext); |
---|
| 558 | rnext/=3.0; |
---|
| 559 | gnext=rnext; |
---|
| 560 | bnext=rnext; |
---|
| 561 | } |
---|
| 562 | |
---|
| 563 | xnext -= xstep/2.0; |
---|
| 564 | ynext -= ystep/2.0; |
---|
| 565 | rnext -= rstep/2.0; |
---|
| 566 | gnext -= gstep/2.0; |
---|
| 567 | bnext -= bstep/2.0; |
---|
| 568 | } else { |
---|
| 569 | steps=0; |
---|
| 570 | } |
---|
| 571 | if (print_colour) { |
---|
| 572 | fprintf (file, "%g %g %g setrgbcolor\n", |
---|
| 573 | vertex[0].red, vertex[0].green, vertex[0].blue); |
---|
| 574 | } else { |
---|
| 575 | intensity = (vertex[0].red + vertex[0].green + vertex[0].blue) / 3.0; |
---|
| 576 | fprintf (file, "%g %g %g setrgbcolor\n", |
---|
| 577 | intensity, intensity, intensity); |
---|
| 578 | } |
---|
| 579 | fprintf (file, "%g %g moveto\n", vertex[0].x, vertex[0].y); |
---|
| 580 | |
---|
| 581 | for (i=0; i<steps; i++) { |
---|
| 582 | |
---|
| 583 | xnext += xstep; |
---|
| 584 | ynext += ystep; |
---|
| 585 | rnext += rstep; |
---|
| 586 | gnext += gstep; |
---|
| 587 | bnext += bstep; |
---|
| 588 | |
---|
| 589 | fprintf (file, "%g %g lineto stroke\n", xnext, ynext); |
---|
| 590 | fprintf (file, "%g %g %g setrgbcolor\n", rnext, gnext, bnext); |
---|
| 591 | fprintf (file, "%g %g moveto\n", xnext, ynext); |
---|
| 592 | } |
---|
| 593 | fprintf (file, "%g %g lineto stroke\n", vertex[1].x, vertex[1].y); |
---|
| 594 | |
---|
| 595 | loc += 14; |
---|
| 596 | break; |
---|
| 597 | |
---|
| 598 | case GL_POLYGON_TOKEN: |
---|
| 599 | nvertices = G4int (*loc); |
---|
| 600 | loc++; |
---|
| 601 | vertex=(Feedback3Dcolor*)loc; |
---|
| 602 | if (nvertices>0) { |
---|
| 603 | red=vertex[0].red; |
---|
| 604 | green=vertex[0].green; |
---|
| 605 | blue=vertex[0].blue; |
---|
| 606 | smooth=0; |
---|
| 607 | |
---|
| 608 | if (!print_colour) { |
---|
| 609 | red+=(green+blue); |
---|
| 610 | red/=3.0; |
---|
| 611 | green=red; |
---|
| 612 | blue=red; |
---|
| 613 | } |
---|
| 614 | |
---|
| 615 | if (print_colour) { |
---|
| 616 | for (i=1; i<nvertices; i++) { |
---|
| 617 | if (red!=vertex[i].red || green!=vertex[i].green || blue!=vertex[i].blue) { |
---|
| 618 | smooth=1; |
---|
| 619 | break; |
---|
| 620 | } |
---|
| 621 | } |
---|
| 622 | } else { |
---|
| 623 | for (i=1; i<nvertices; i++) { |
---|
| 624 | intensity = vertex[i].red + vertex[i].green + vertex[i].blue; |
---|
| 625 | intensity/=3.0; |
---|
| 626 | if (red!=intensity) { |
---|
| 627 | smooth=1; |
---|
| 628 | break; |
---|
| 629 | } |
---|
| 630 | } |
---|
| 631 | } |
---|
| 632 | |
---|
| 633 | if (smooth) { |
---|
| 634 | G4int triOffset; |
---|
| 635 | for (i=0; i<nvertices-2; i++) { |
---|
| 636 | triOffset = i*7; |
---|
| 637 | fprintf (file, "[%g %g %g %g %g %g]", |
---|
| 638 | vertex[0].x, vertex[i+1].x, vertex[i+2].x, |
---|
| 639 | vertex[0].y, vertex[i+1].y, vertex[i+2].y); |
---|
| 640 | if (print_colour) { |
---|
| 641 | fprintf (file, " [%g %g %g] [%g %g %g] [%g %g %g] gouraudtriangle\n", |
---|
| 642 | vertex[0].red, vertex[0].green, vertex[0].blue, |
---|
| 643 | vertex[i+1].red, vertex[i+1].green, vertex[i+1].blue, |
---|
| 644 | vertex[i+2].red, vertex[i+2].green, vertex[i+2].blue); |
---|
| 645 | } else { |
---|
| 646 | |
---|
| 647 | intensity = vertex[0].red + vertex[0].green + vertex[0].blue; |
---|
| 648 | intensity/=3.0; |
---|
| 649 | fprintf (file, " [%g %g %g]", intensity, intensity, intensity); |
---|
| 650 | |
---|
| 651 | intensity = vertex[1].red + vertex[1].green + vertex[1].blue; |
---|
| 652 | intensity/=3.0; |
---|
| 653 | fprintf (file, " [%g %g %g]", intensity, intensity, intensity); |
---|
| 654 | |
---|
| 655 | intensity = vertex[2].red + vertex[2].green + vertex[2].blue; |
---|
| 656 | intensity/=3.0; |
---|
| 657 | fprintf (file, " [%g %g %g] gouraudtriangle\n", intensity, intensity, intensity); |
---|
| 658 | } |
---|
| 659 | } |
---|
| 660 | } else { |
---|
| 661 | fprintf (file, "newpath\n"); |
---|
| 662 | fprintf (file, "%g %g %g setrgbcolor\n", red, green, blue); |
---|
| 663 | fprintf (file, "%g %g moveto\n", vertex[0].x, vertex[0].y); |
---|
| 664 | for (i=1; i<nvertices; i++) { |
---|
| 665 | fprintf (file, "%g %g lineto\n", vertex[i].x, vertex[i].y); |
---|
| 666 | } |
---|
| 667 | fprintf (file, "closepath fill\n\n"); |
---|
| 668 | } |
---|
| 669 | } |
---|
| 670 | loc += nvertices*7; |
---|
| 671 | break; |
---|
| 672 | |
---|
| 673 | case GL_POINT_TOKEN: |
---|
| 674 | vertex=(Feedback3Dcolor*)loc; |
---|
| 675 | if (print_colour) { |
---|
| 676 | fprintf (file, "%g %g %g setrgbcolor\n", vertex[0].red, vertex[0].green, vertex[0].blue); |
---|
| 677 | } else { |
---|
| 678 | intensity = vertex[0].red + vertex[0].green + vertex[0].blue; |
---|
| 679 | intensity/=3.0; |
---|
| 680 | fprintf (file, "%g %g %g setrgbcolor\n", intensity, intensity, intensity); |
---|
| 681 | } |
---|
| 682 | fprintf(file, "%g %g %g 0 360 arc fill\n\n", vertex[0].x, vertex[0].y, pointSize / 2.0); |
---|
| 683 | loc += 7; /* Each vertex element in the feedback |
---|
| 684 | buffer is 7 GLfloats. */ |
---|
| 685 | break; |
---|
| 686 | default: |
---|
| 687 | /* XXX Left as an excersie to the reader. */ |
---|
| 688 | static G4bool spewPrimitiveEPSWarned = false; |
---|
| 689 | if (!spewPrimitiveEPSWarned) { |
---|
| 690 | std::ostringstream oss; |
---|
| 691 | oss << |
---|
| 692 | "Incomplete implementation. Unexpected token (" << token << ")." |
---|
| 693 | "\n (Seems to be caused by text.)"; |
---|
| 694 | G4Exception("G4OpenGLViewer::spewPrimitiveEPS", |
---|
| 695 | "Unexpected token", |
---|
| 696 | JustWarning, |
---|
| 697 | oss.str().c_str()); |
---|
| 698 | spewPrimitiveEPSWarned = true; |
---|
| 699 | } |
---|
| 700 | } |
---|
| 701 | return loc; |
---|
| 702 | } |
---|
| 703 | |
---|
| 704 | typedef struct G4OpenGLViewerDepthIndex { |
---|
| 705 | GLfloat *ptr; |
---|
| 706 | GLfloat depth; |
---|
| 707 | } DepthIndex; |
---|
| 708 | |
---|
| 709 | extern "C" { |
---|
| 710 | int G4OpenGLViewercompare(const void *a, const void *b) |
---|
| 711 | { |
---|
| 712 | const DepthIndex *p1 = (DepthIndex *) a; |
---|
| 713 | const DepthIndex *p2 = (DepthIndex *) b; |
---|
| 714 | GLfloat diff = p2->depth - p1->depth; |
---|
| 715 | |
---|
| 716 | if (diff > 0.0) { |
---|
| 717 | return 1; |
---|
| 718 | } else if (diff < 0.0) { |
---|
| 719 | return -1; |
---|
| 720 | } else { |
---|
| 721 | return 0; |
---|
| 722 | } |
---|
| 723 | } |
---|
| 724 | } |
---|
| 725 | |
---|
| 726 | void G4OpenGLViewer::spewSortedFeedback(FILE * file, GLint size, GLfloat * buffer) |
---|
| 727 | { |
---|
| 728 | int token; |
---|
| 729 | GLfloat *loc, *end; |
---|
| 730 | Feedback3Dcolor *vertex; |
---|
| 731 | GLfloat depthSum; |
---|
| 732 | int nprimitives, item; |
---|
| 733 | DepthIndex *prims; |
---|
| 734 | int nvertices, i; |
---|
| 735 | |
---|
| 736 | end = buffer + size; |
---|
| 737 | |
---|
| 738 | /* Count how many primitives there are. */ |
---|
| 739 | nprimitives = 0; |
---|
| 740 | loc = buffer; |
---|
| 741 | while (loc < end) { |
---|
| 742 | token = int (*loc); |
---|
| 743 | loc++; |
---|
| 744 | switch (token) { |
---|
| 745 | case GL_LINE_TOKEN: |
---|
| 746 | case GL_LINE_RESET_TOKEN: |
---|
| 747 | loc += 14; |
---|
| 748 | nprimitives++; |
---|
| 749 | break; |
---|
| 750 | case GL_POLYGON_TOKEN: |
---|
| 751 | nvertices = int (*loc); |
---|
| 752 | loc++; |
---|
| 753 | loc += (7 * nvertices); |
---|
| 754 | nprimitives++; |
---|
| 755 | break; |
---|
| 756 | case GL_POINT_TOKEN: |
---|
| 757 | loc += 7; |
---|
| 758 | nprimitives++; |
---|
| 759 | break; |
---|
| 760 | default: |
---|
| 761 | /* XXX Left as an excersie to the reader. */ |
---|
| 762 | static G4bool spewSortedFeedbackWarned = false; |
---|
| 763 | if (!spewSortedFeedbackWarned) { |
---|
| 764 | std::ostringstream oss; |
---|
| 765 | oss << |
---|
| 766 | "Incomplete implementation. Unexpected token (" << token << ")." |
---|
| 767 | "\n (Seems to be caused by text.)"; |
---|
| 768 | G4Exception("G4OpenGLViewer::spewSortedFeedback", |
---|
| 769 | "Unexpected token", |
---|
| 770 | JustWarning, |
---|
| 771 | oss.str().c_str()); |
---|
| 772 | spewSortedFeedbackWarned = true; |
---|
| 773 | } |
---|
| 774 | nprimitives++; |
---|
| 775 | } |
---|
| 776 | } |
---|
| 777 | |
---|
| 778 | /* Allocate an array of pointers that will point back at |
---|
| 779 | primitives in the feedback buffer. There will be one |
---|
| 780 | entry per primitive. This array is also where we keep the |
---|
| 781 | primitive's average depth. There is one entry per |
---|
| 782 | primitive in the feedback buffer. */ |
---|
| 783 | prims = (DepthIndex *) malloc(sizeof(DepthIndex) * nprimitives); |
---|
| 784 | |
---|
| 785 | item = 0; |
---|
| 786 | loc = buffer; |
---|
| 787 | while (loc < end) { |
---|
| 788 | prims[item].ptr = loc; /* Save this primitive's location. */ |
---|
| 789 | token = int (*loc); |
---|
| 790 | loc++; |
---|
| 791 | switch (token) { |
---|
| 792 | case GL_LINE_TOKEN: |
---|
| 793 | case GL_LINE_RESET_TOKEN: |
---|
| 794 | vertex = (Feedback3Dcolor *) loc; |
---|
| 795 | depthSum = vertex[0].z + vertex[1].z; |
---|
| 796 | prims[item].depth = depthSum / 2.0; |
---|
| 797 | loc += 14; |
---|
| 798 | break; |
---|
| 799 | case GL_POLYGON_TOKEN: |
---|
| 800 | nvertices = int (*loc); |
---|
| 801 | loc++; |
---|
| 802 | vertex = (Feedback3Dcolor *) loc; |
---|
| 803 | depthSum = vertex[0].z; |
---|
| 804 | for (i = 1; i < nvertices; i++) { |
---|
| 805 | depthSum += vertex[i].z; |
---|
| 806 | } |
---|
| 807 | prims[item].depth = depthSum / nvertices; |
---|
| 808 | loc += (7 * nvertices); |
---|
| 809 | break; |
---|
| 810 | case GL_POINT_TOKEN: |
---|
| 811 | vertex = (Feedback3Dcolor *) loc; |
---|
| 812 | prims[item].depth = vertex[0].z; |
---|
| 813 | loc += 7; |
---|
| 814 | break; |
---|
| 815 | default: |
---|
| 816 | /* XXX Left as an excersie to the reader. */ |
---|
| 817 | assert(1); |
---|
| 818 | } |
---|
| 819 | item++; |
---|
| 820 | } |
---|
| 821 | assert(item == nprimitives); |
---|
| 822 | |
---|
| 823 | /* Sort the primitives back to front. */ |
---|
| 824 | qsort(prims, nprimitives, sizeof(DepthIndex), G4OpenGLViewercompare); |
---|
| 825 | |
---|
| 826 | /* Understand that sorting by a primitives average depth |
---|
| 827 | doesn't allow us to disambiguate some cases like self |
---|
| 828 | intersecting polygons. Handling these cases would require |
---|
| 829 | breaking up the primitives. That's too involved for this |
---|
| 830 | example. Sorting by depth is good enough for lots of |
---|
| 831 | applications. */ |
---|
| 832 | |
---|
| 833 | /* Emit the Encapsulated PostScript for the primitives in |
---|
| 834 | back to front order. */ |
---|
| 835 | for (item = 0; item < nprimitives; item++) { |
---|
| 836 | (void) spewPrimitiveEPS(file, prims[item].ptr); |
---|
| 837 | } |
---|
| 838 | |
---|
| 839 | free(prims); |
---|
| 840 | } |
---|
| 841 | |
---|
[529] | 842 | #endif |
---|