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1 /*
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2 Open Asset Import Library (assimp)
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3 ----------------------------------------------------------------------
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4
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5 Copyright (c) 2006-2012, assimp team
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6 All rights reserved.
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7
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8 Redistribution and use of this software in source and binary forms,
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9 with or without modification, are permitted provided that the
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10 following conditions are met:
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11
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12 * Redistributions of source code must retain the above
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13 copyright notice, this list of conditions and the
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14 following disclaimer.
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15
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16 * Redistributions in binary form must reproduce the above
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17 copyright notice, this list of conditions and the
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18 following disclaimer in the documentation and/or other
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19 materials provided with the distribution.
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20
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21 * Neither the name of the assimp team, nor the names of its
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22 contributors may be used to endorse or promote products
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23 derived from this software without specific prior
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24 written permission of the assimp team.
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25
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26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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30 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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31 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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32 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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33 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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37
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38 ----------------------------------------------------------------------
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39 */
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40
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41 /** @file OptimizeGraph.h
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42 * @brief Declares a post processing step to optimize the scenegraph
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43 */
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44 #ifndef AI_OPTIMIZEGRAPHPROCESS_H_INC
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45 #define AI_OPTIMIZEGRAPHPROCESS_H_INC
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46
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47 #include "BaseProcess.h"
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48 #include "ProcessHelper.h"
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49 #include "assimp/types.h"
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50
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51 struct aiMesh;
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52 class OptimizeGraphProcessTest;
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53 namespace Assimp {
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54
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55 // -----------------------------------------------------------------------------
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56 /** @brief Postprocessing step to optimize the scenegraph
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57 *
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58 * The implementation tries to merge nodes, even if they use different
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59 * transformations. Animations are preserved.
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60 *
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61 * @see aiProcess_OptimizeGraph for a detailed description of the
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62 * algorithm being applied.
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63 */
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64 class OptimizeGraphProcess : public BaseProcess
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65 {
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66 public:
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67
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68 OptimizeGraphProcess();
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69 ~OptimizeGraphProcess();
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70
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71 public:
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72 // -------------------------------------------------------------------
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73 bool IsActive( unsigned int pFlags) const;
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74
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75 // -------------------------------------------------------------------
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76 void Execute( aiScene* pScene);
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77
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78 // -------------------------------------------------------------------
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79 void SetupProperties(const Importer* pImp);
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80
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81
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82 // -------------------------------------------------------------------
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83 /** @brief Add a list of node names to be locked and not modified.
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84 * @param in List of nodes. See #AI_CONFIG_PP_OG_EXCLUDE_LIST for
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85 * format explanations.
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86 */
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87 inline void AddLockedNodeList(std::string& in)
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88 {
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89 ConvertListToStrings (in,locked_nodes);
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90 }
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91
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92 // -------------------------------------------------------------------
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93 /** @brief Add another node to be locked and not modified.
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94 * @param name Name to be locked
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95 */
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96 inline void AddLockedNode(std::string& name)
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97 {
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98 locked_nodes.push_back(name);
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99 }
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100
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101 // -------------------------------------------------------------------
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102 /** @brief Rmeove a node from the list of locked nodes.
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103 * @param name Name to be unlocked
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104 */
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105 inline void RemoveLockedNode(std::string& name)
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106 {
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107 locked_nodes.remove(name);
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108 }
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109
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110 protected:
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111
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112 void CollectNewChildren(aiNode* nd, std::list<aiNode*>& nodes);
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113 void FindInstancedMeshes (aiNode* pNode);
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114
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115 private:
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116
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117 #ifdef AI_OG_USE_HASHING
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118 typedef std::set<unsigned int> LockedSetType;
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119 #else
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120 typedef std::set<std::string> LockedSetType;
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121 #endif
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122
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123
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124 //! Scene we're working with
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125 aiScene* mScene;
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126
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127 //! List of locked names. Stored is the hash of the name
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128 LockedSetType locked;
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129
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130 //! List of nodes to be locked in addition to those with animations, lights or cameras assigned.
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131 std::list<std::string> locked_nodes;
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132
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133 //! Node counters for logging purposes
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134 unsigned int nodes_in,nodes_out, count_merged;
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135
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136 //! Reference counters for meshes
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137 std::vector<unsigned int> meshes;
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138 };
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139
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140 } // end of namespace Assimp
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141
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142 #endif // AI_OPTIMIZEGRAPHPROCESS_H_INC
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