[834] | 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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| 27 | // $Id: G4XXXSGViewer.cc,v 1.4 2006/08/29 16:11:25 allison Exp $ |
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[944] | 28 | // GEANT4 tag $Name: $ |
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[834] | 29 | // |
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| 30 | // |
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| 31 | // John Allison 10th March 2006 |
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| 32 | // A template for a sophisticated graphics driver with a scene graph. |
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| 33 | //?? Lines beginning like this require specialisation for your driver. |
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| 34 | |
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| 35 | #ifdef G4VIS_BUILD_XXXSG_DRIVER |
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| 36 | |
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| 37 | #include "G4XXXSGViewer.hh" |
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| 38 | |
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| 39 | #include "G4VSceneHandler.hh" |
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| 40 | #include "G4XXXSGSceneHandler.hh" |
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| 41 | |
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| 42 | #include <fstream> |
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| 43 | |
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| 44 | G4XXXSGViewer::G4XXXSGViewer |
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| 45 | (G4VSceneHandler& sceneHandler, const G4String& name): |
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| 46 | G4VViewer(sceneHandler, sceneHandler.IncrementViewCount(), name) |
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| 47 | {} |
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| 48 | |
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| 49 | G4XXXSGViewer::~G4XXXSGViewer() {} |
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| 50 | |
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| 51 | void G4XXXSGViewer::SetView() { |
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| 52 | //#ifdef G4XXXSGDEBUG |
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| 53 | G4cout << "G4XXXSGViewer::SetView() called." << G4endl; |
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| 54 | //#endif |
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| 55 | } |
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| 56 | |
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| 57 | void G4XXXSGViewer::ClearView() { |
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| 58 | //#ifdef G4XXXSGDEBUG |
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| 59 | G4cout << "G4XXXSGViewer::ClearView() called." << G4endl; |
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| 60 | //#endif |
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| 61 | } |
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| 62 | |
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| 63 | void G4XXXSGViewer::DrawView() { |
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| 64 | //#ifdef G4XXXSGDEBUG |
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| 65 | G4cout << "G4XXXSGViewer::DrawView() called." << G4endl; |
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| 66 | //#endif |
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| 67 | |
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| 68 | // First, a view should decide when to re-visit the G4 kernel. |
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| 69 | // Sometimes it might not be necessary, e.g., if the scene is stored |
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| 70 | // in a graphical database (e.g., OpenGL's display lists) and only |
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| 71 | // the viewing angle has changed. But graphics systems without a |
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| 72 | // graphical database will always need to visit the G4 kernel. |
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| 73 | |
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| 74 | // The fNeedKernelVisit flag might have been set by the user in |
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| 75 | // /vis/viewer/rebuild, but if not, make decision and set flag only |
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| 76 | // if necessary... |
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| 77 | if (!fNeedKernelVisit) KernelVisitDecision(); |
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| 78 | G4bool kernelVisitWasNeeded = fNeedKernelVisit; // Keep (ProcessView resets). |
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| 79 | |
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| 80 | ProcessView (); // Clears store and processes scene only if necessary. |
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| 81 | |
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| 82 | if (kernelVisitWasNeeded) { |
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| 83 | // Some systems, notably OpenGL, can draw while re-building, so |
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| 84 | // there might not be a need to draw from store again here. But |
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| 85 | // in this case... |
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| 86 | DrawFromStore("G4XXXSGViewer::DrawView"); |
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| 87 | } else { |
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| 88 | DrawFromStore("G4XXXSGViewer::DrawView"); |
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| 89 | } |
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| 90 | |
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| 91 | // ...before finally... |
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| 92 | FinishView (); // Flush streams and/or swap buffers. |
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| 93 | } |
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| 94 | |
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| 95 | void G4XXXSGViewer::ShowView() { |
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| 96 | //#ifdef G4XXXSGDEBUG |
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| 97 | G4cout << "G4XXXSGViewer::ShowView() called." << G4endl; |
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| 98 | //#endif |
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| 99 | // This is what you should see... |
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| 100 | DrawFromStore("G4XXXSGViewer::ShowView"); |
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| 101 | } |
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| 102 | |
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| 103 | void G4XXXSGViewer::KernelVisitDecision () { |
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| 104 | |
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| 105 | // If there's a significant difference with the last view parameters |
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| 106 | // of either the scene handler or this viewer, trigger a rebuild. |
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| 107 | |
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| 108 | typedef taj::tree<G4String> SceneGraph; |
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| 109 | typedef taj::tree<G4String>::iterator SceneGraphIterator; |
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| 110 | SceneGraph& sceneGraph = |
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| 111 | static_cast<G4XXXSGSceneHandler&>(fSceneHandler).fSceneGraph; |
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| 112 | if (sceneGraph.size() == 3 // I.e., only the root nodes. |
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| 113 | || CompareForKernelVisit(fLastVP)) { |
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| 114 | NeedKernelVisit (); // Sets fNeedKernelVisit. |
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| 115 | } |
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| 116 | fLastVP = fVP; |
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| 117 | } |
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| 118 | |
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| 119 | G4bool G4XXXSGViewer::CompareForKernelVisit(G4ViewParameters& lastVP) |
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| 120 | { |
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| 121 | // Typical comparison. Taken from OpenGL. |
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| 122 | if ( |
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| 123 | (lastVP.GetDrawingStyle () != fVP.GetDrawingStyle ()) || |
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| 124 | (lastVP.IsAuxEdgeVisible () != fVP.IsAuxEdgeVisible ()) || |
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| 125 | (lastVP.GetRepStyle () != fVP.GetRepStyle ()) || |
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| 126 | (lastVP.IsCulling () != fVP.IsCulling ()) || |
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| 127 | (lastVP.IsCullingInvisible () != fVP.IsCullingInvisible ()) || |
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| 128 | (lastVP.IsDensityCulling () != fVP.IsDensityCulling ()) || |
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| 129 | (lastVP.IsCullingCovered () != fVP.IsCullingCovered ()) || |
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| 130 | // No need to visit kernel if section plane changes. |
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| 131 | // No need to visit kernel if cutaway planes change. |
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| 132 | (lastVP.IsExplode () != fVP.IsExplode ()) || |
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| 133 | (lastVP.GetNoOfSides () != fVP.GetNoOfSides ()) || |
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| 134 | (lastVP.IsMarkerNotHidden () != fVP.IsMarkerNotHidden ()) || |
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| 135 | (lastVP.GetBackgroundColour ()!= fVP.GetBackgroundColour ()) |
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| 136 | ) { |
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| 137 | return true; |
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| 138 | } |
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| 139 | |
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| 140 | if (lastVP.IsDensityCulling () && |
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| 141 | (lastVP.GetVisibleDensity () != fVP.GetVisibleDensity ())) |
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| 142 | return true; |
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| 143 | |
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| 144 | if (lastVP.IsExplode () && |
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| 145 | (lastVP.GetExplodeFactor () != fVP.GetExplodeFactor ())) |
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| 146 | return true; |
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| 147 | |
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| 148 | return false; |
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| 149 | } |
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| 150 | |
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| 151 | void G4XXXSGViewer::DrawFromStore(const G4String& source) { |
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| 152 | typedef taj::tree<G4String> SceneGraph; |
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| 153 | typedef taj::tree<G4String>::preorder_iterator SceneGraphPreIterator; |
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| 154 | SceneGraph& sceneGraph = |
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| 155 | static_cast<G4XXXSGSceneHandler&>(fSceneHandler).fSceneGraph; |
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| 156 | // Write to a file for testing... |
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| 157 | static G4int iCount = 0; |
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| 158 | std::ostringstream oss; |
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| 159 | oss << source << '.' << fName << '.' << iCount++ << ".out"; |
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| 160 | G4cout << "Writing " << oss.str() << G4endl; |
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| 161 | std::ofstream ofs(oss.str().c_str()); |
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| 162 | for (SceneGraphPreIterator i = sceneGraph.beginPre(); |
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| 163 | i != sceneGraph.endPre(); ++i) { |
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| 164 | G4int depth = 0; |
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| 165 | SceneGraphPreIterator j = i; |
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| 166 | while (j != sceneGraph.getRoot()) {j = j.parent(); ++depth;} |
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| 167 | ofs << "\nDepth: " << depth; |
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| 168 | ofs << *i; |
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| 169 | } |
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| 170 | ofs.close(); |
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| 171 | } |
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| 172 | |
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| 173 | #endif |
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