[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: G4XXXStoredViewer.cc,v 1.5 2006/08/29 16:11:25 allison Exp $ |
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[850] | 28 | // GEANT4 tag $Name: HEAD $ |
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[834] | 29 | // |
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| 30 | // |
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| 31 | // John Allison 7th March 2006 |
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| 32 | // A template for a graphics driver with a store/database. |
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| 33 | //?? Lines beginning like this require specialisation for your driver. |
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| 34 | |
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| 35 | #include "G4XXXStoredViewer.hh" |
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| 36 | |
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| 37 | #include "G4VSceneHandler.hh" |
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| 38 | #include "G4XXXStoredSceneHandler.hh" |
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| 39 | |
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| 40 | #include <fstream> |
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| 41 | #include <sstream> |
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| 42 | |
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| 43 | G4XXXStoredViewer::G4XXXStoredViewer |
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| 44 | (G4VSceneHandler& sceneHandler, const G4String& name): |
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| 45 | G4VViewer(sceneHandler, sceneHandler.IncrementViewCount(), name) |
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| 46 | {} |
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| 47 | |
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| 48 | G4XXXStoredViewer::~G4XXXStoredViewer() {} |
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| 49 | |
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| 50 | void G4XXXStoredViewer::SetView() { |
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| 51 | #ifdef G4XXXStoredDEBUG |
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| 52 | G4cout << "G4XXXStoredViewer::SetView() called." << G4endl; |
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| 53 | #endif |
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| 54 | } |
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| 55 | |
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| 56 | void G4XXXStoredViewer::ClearView() { |
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| 57 | #ifdef G4XXXStoredDEBUG |
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| 58 | G4cout << "G4XXXStoredViewer::ClearView() called." << G4endl; |
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| 59 | #endif |
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| 60 | } |
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| 61 | |
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| 62 | void G4XXXStoredViewer::DrawView() { |
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| 63 | #ifdef G4XXXStoredDEBUG |
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| 64 | G4cout << "G4XXXStoredViewer::DrawView() called." << G4endl; |
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| 65 | #endif |
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| 66 | |
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| 67 | // First, a view should decide when to re-visit the G4 kernel. |
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| 68 | // Sometimes it might not be necessary, e.g., if the scene is stored |
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| 69 | // in a graphical database (e.g., OpenGL's display lists) and only |
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| 70 | // the viewing angle has changed. But graphics systems without a |
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| 71 | // graphical database will always need to visit the G4 kernel. |
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| 72 | |
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| 73 | // The fNeedKernelVisit flag might have been set by the user in |
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| 74 | // /vis/viewer/rebuild, but if not, make decision and set flag only |
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| 75 | // if necessary... |
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| 76 | if (!fNeedKernelVisit) KernelVisitDecision(); |
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| 77 | G4bool kernelVisitWasNeeded = fNeedKernelVisit; // Keep (ProcessView resets). |
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| 78 | |
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| 79 | ProcessView (); // Clears store and processes scene only if necessary. |
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| 80 | |
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| 81 | if (kernelVisitWasNeeded) { |
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| 82 | // Some systems, notably OpenGL, can draw while re-building, so |
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| 83 | // there might not be a need to draw from store again here. But |
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| 84 | // in this case... |
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| 85 | DrawFromStore(); |
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| 86 | } else { |
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| 87 | DrawFromStore(); |
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| 88 | } |
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| 89 | |
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| 90 | // ...before finally... |
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| 91 | FinishView (); // Flush streams and/or swap buffers. |
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| 92 | } |
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| 93 | |
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| 94 | void G4XXXStoredViewer::ShowView() { |
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| 95 | #ifdef G4XXXStoredDEBUG |
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| 96 | G4cout << "G4XXXStoredViewer::ShowView() called." << G4endl; |
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| 97 | #endif |
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| 98 | } |
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| 99 | |
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| 100 | void G4XXXStoredViewer::KernelVisitDecision () { |
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| 101 | |
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| 102 | // If there's a significant difference with the last view parameters |
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| 103 | // of either the scene handler or this viewer, trigger a rebuild. |
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| 104 | |
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| 105 | typedef std::list<G4String> Store; |
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| 106 | typedef std::list<G4String>::iterator StoreIterator; |
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| 107 | Store& store = |
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| 108 | static_cast<G4XXXStoredSceneHandler&>(fSceneHandler).fStore; |
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| 109 | if (store.empty() || CompareForKernelVisit(fLastVP)) { |
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| 110 | NeedKernelVisit (); // Sets fNeedKernelVisit. |
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| 111 | } |
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| 112 | fLastVP = fVP; |
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| 113 | } |
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| 114 | |
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| 115 | G4bool G4XXXStoredViewer::CompareForKernelVisit(G4ViewParameters& lastVP) |
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| 116 | { |
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| 117 | // Typical comparison. Taken from OpenGL. |
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| 118 | if ( |
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| 119 | (lastVP.GetDrawingStyle () != fVP.GetDrawingStyle ()) || |
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| 120 | (lastVP.IsAuxEdgeVisible () != fVP.IsAuxEdgeVisible ()) || |
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| 121 | (lastVP.GetRepStyle () != fVP.GetRepStyle ()) || |
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| 122 | (lastVP.IsCulling () != fVP.IsCulling ()) || |
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| 123 | (lastVP.IsCullingInvisible () != fVP.IsCullingInvisible ()) || |
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| 124 | (lastVP.IsDensityCulling () != fVP.IsDensityCulling ()) || |
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| 125 | (lastVP.IsCullingCovered () != fVP.IsCullingCovered ()) || |
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| 126 | // No need to visit kernel if section plane changes. |
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| 127 | // No need to visit kernel if cutaway planes change. |
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| 128 | (lastVP.IsExplode () != fVP.IsExplode ()) || |
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| 129 | (lastVP.GetNoOfSides () != fVP.GetNoOfSides ()) || |
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| 130 | (lastVP.IsMarkerNotHidden () != fVP.IsMarkerNotHidden ()) || |
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| 131 | (lastVP.GetBackgroundColour ()!= fVP.GetBackgroundColour ()) |
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| 132 | ) { |
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| 133 | return true; |
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| 134 | } |
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| 135 | |
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| 136 | if (lastVP.IsDensityCulling () && |
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| 137 | (lastVP.GetVisibleDensity () != fVP.GetVisibleDensity ())) |
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| 138 | return true; |
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| 139 | |
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| 140 | if (lastVP.IsExplode () && |
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| 141 | (lastVP.GetExplodeFactor () != fVP.GetExplodeFactor ())) |
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| 142 | return true; |
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| 143 | |
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| 144 | return false; |
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| 145 | } |
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| 146 | |
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| 147 | void G4XXXStoredViewer::DrawFromStore() { |
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| 148 | typedef std::list<G4String> Store; |
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| 149 | typedef std::list<G4String>::iterator StoreIterator; |
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| 150 | Store& store = |
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| 151 | static_cast<G4XXXStoredSceneHandler&>(fSceneHandler).fStore; |
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| 152 | // Write to a file for testing... |
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| 153 | static G4int iCount = 0; |
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| 154 | std::ostringstream oss; |
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| 155 | oss << fName << '.' << iCount++ << ".out"; |
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| 156 | std::ofstream ofs(oss.str().c_str()); |
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| 157 | for (StoreIterator i = store.begin(); i != store.end(); ++i) { |
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| 158 | ofs << *i; |
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| 159 | } |
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| 160 | ofs.close(); |
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| 161 | } |
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