1 | /* |
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2 | Bullet Continuous Collision Detection and Physics Library |
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3 | Copyright (c) 2003-2007 Erwin Coumans http://continuousphysics.com/Bullet/ |
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4 | |
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5 | This software is provided 'as-is', without any express or implied warranty. |
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6 | In no event will the authors be held liable for any damages arising from the use of this software. |
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7 | Permission is granted to anyone to use this software for any purpose, |
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8 | including commercial applications, and to alter it and redistribute it freely, |
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9 | subject to the following restrictions: |
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10 | |
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11 | 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. |
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12 | 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. |
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13 | 3. This notice may not be removed or altered from any source distribution. |
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14 | */ |
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15 | ///btDbvtBroadphase implementation by Nathanael Presson |
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16 | |
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17 | #include "btDbvtBroadphase.h" |
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18 | |
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19 | // |
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20 | // Profiling |
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21 | // |
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22 | |
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23 | #if DBVT_BP_PROFILE||DBVT_BP_ENABLE_BENCHMARK |
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24 | #include <stdio.h> |
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25 | #endif |
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26 | |
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27 | #if DBVT_BP_PROFILE |
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28 | struct ProfileScope |
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29 | { |
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30 | __forceinline ProfileScope(btClock& clock,unsigned long& value) : |
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31 | m_clock(&clock),m_value(&value),m_base(clock.getTimeMicroseconds()) |
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32 | { |
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33 | } |
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34 | __forceinline ~ProfileScope() |
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35 | { |
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36 | (*m_value)+=m_clock->getTimeMicroseconds()-m_base; |
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37 | } |
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38 | btClock* m_clock; |
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39 | unsigned long* m_value; |
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40 | unsigned long m_base; |
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41 | }; |
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42 | #define SPC(_value_) ProfileScope spc_scope(m_clock,_value_) |
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43 | #else |
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44 | #define SPC(_value_) |
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45 | #endif |
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46 | |
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47 | // |
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48 | // Helpers |
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49 | // |
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50 | |
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51 | // |
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52 | template <typename T> |
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53 | static inline void listappend(T* item,T*& list) |
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54 | { |
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55 | item->links[0]=0; |
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56 | item->links[1]=list; |
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57 | if(list) list->links[0]=item; |
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58 | list=item; |
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59 | } |
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60 | |
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61 | // |
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62 | template <typename T> |
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63 | static inline void listremove(T* item,T*& list) |
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64 | { |
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65 | if(item->links[0]) item->links[0]->links[1]=item->links[1]; else list=item->links[1]; |
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66 | if(item->links[1]) item->links[1]->links[0]=item->links[0]; |
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67 | } |
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68 | |
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69 | // |
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70 | template <typename T> |
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71 | static inline int listcount(T* root) |
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72 | { |
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73 | int n=0; |
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74 | while(root) { ++n;root=root->links[1]; } |
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75 | return(n); |
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76 | } |
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77 | |
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78 | // |
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79 | template <typename T> |
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80 | static inline void clear(T& value) |
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81 | { |
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82 | static const struct ZeroDummy : T {} zerodummy; |
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83 | value=zerodummy; |
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84 | } |
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85 | |
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86 | // |
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87 | // Colliders |
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88 | // |
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89 | |
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90 | /* Tree collider */ |
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91 | struct btDbvtTreeCollider : btDbvt::ICollide |
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92 | { |
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93 | btDbvtBroadphase* pbp; |
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94 | btDbvtProxy* proxy; |
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95 | btDbvtTreeCollider(btDbvtBroadphase* p) : pbp(p) {} |
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96 | void Process(const btDbvtNode* na,const btDbvtNode* nb) |
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97 | { |
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98 | if(na!=nb) |
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99 | { |
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100 | btDbvtProxy* pa=(btDbvtProxy*)na->data; |
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101 | btDbvtProxy* pb=(btDbvtProxy*)nb->data; |
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102 | #if DBVT_BP_SORTPAIRS |
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103 | if(pa>pb) btSwap(pa,pb); |
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104 | #endif |
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105 | pbp->m_paircache->addOverlappingPair(pa,pb); |
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106 | ++pbp->m_newpairs; |
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107 | } |
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108 | } |
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109 | void Process(const btDbvtNode* n) |
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110 | { |
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111 | Process(n,proxy->leaf); |
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112 | } |
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113 | }; |
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114 | |
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115 | // |
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116 | // btDbvtBroadphase |
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117 | // |
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118 | |
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119 | // |
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120 | btDbvtBroadphase::btDbvtBroadphase(btOverlappingPairCache* paircache) |
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121 | { |
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122 | m_deferedcollide = false; |
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123 | m_needcleanup = true; |
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124 | m_releasepaircache = (paircache!=0)?false:true; |
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125 | m_prediction = 1/(btScalar)2; |
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126 | m_stageCurrent = 0; |
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127 | m_fixedleft = 0; |
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128 | m_fupdates = 1; |
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129 | m_dupdates = 0; |
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130 | m_cupdates = 10; |
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131 | m_newpairs = 1; |
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132 | m_updates_call = 0; |
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133 | m_updates_done = 0; |
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134 | m_updates_ratio = 0; |
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135 | m_paircache = paircache? |
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136 | paircache : |
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137 | new(btAlignedAlloc(sizeof(btHashedOverlappingPairCache),16)) btHashedOverlappingPairCache(); |
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138 | m_gid = 0; |
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139 | m_pid = 0; |
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140 | m_cid = 0; |
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141 | for(int i=0;i<=STAGECOUNT;++i) |
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142 | { |
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143 | m_stageRoots[i]=0; |
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144 | } |
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145 | #if DBVT_BP_PROFILE |
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146 | clear(m_profiling); |
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147 | #endif |
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148 | } |
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149 | |
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150 | // |
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151 | btDbvtBroadphase::~btDbvtBroadphase() |
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152 | { |
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153 | if(m_releasepaircache) |
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154 | { |
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155 | m_paircache->~btOverlappingPairCache(); |
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156 | btAlignedFree(m_paircache); |
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157 | } |
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158 | } |
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159 | |
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160 | // |
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161 | btBroadphaseProxy* btDbvtBroadphase::createProxy( const btVector3& aabbMin, |
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162 | const btVector3& aabbMax, |
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163 | int /*shapeType*/, |
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164 | void* userPtr, |
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165 | short int collisionFilterGroup, |
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166 | short int collisionFilterMask, |
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167 | btDispatcher* /*dispatcher*/, |
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168 | void* /*multiSapProxy*/) |
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169 | { |
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170 | btDbvtProxy* proxy=new(btAlignedAlloc(sizeof(btDbvtProxy),16)) btDbvtProxy( userPtr, |
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171 | collisionFilterGroup, |
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172 | collisionFilterMask); |
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173 | proxy->aabb = btDbvtVolume::FromMM(aabbMin,aabbMax); |
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174 | proxy->stage = m_stageCurrent; |
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175 | proxy->m_uniqueId = ++m_gid; |
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176 | proxy->leaf = m_sets[0].insert(proxy->aabb,proxy); |
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177 | listappend(proxy,m_stageRoots[m_stageCurrent]); |
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178 | if(!m_deferedcollide) |
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179 | { |
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180 | btDbvtTreeCollider collider(this); |
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181 | collider.proxy=proxy; |
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182 | btDbvt::collideTV(m_sets[0].m_root,proxy->aabb,collider); |
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183 | btDbvt::collideTV(m_sets[1].m_root,proxy->aabb,collider); |
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184 | } |
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185 | return(proxy); |
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186 | } |
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187 | |
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188 | // |
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189 | void btDbvtBroadphase::destroyProxy( btBroadphaseProxy* absproxy, |
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190 | btDispatcher* dispatcher) |
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191 | { |
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192 | btDbvtProxy* proxy=(btDbvtProxy*)absproxy; |
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193 | if(proxy->stage==STAGECOUNT) |
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194 | m_sets[1].remove(proxy->leaf); |
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195 | else |
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196 | m_sets[0].remove(proxy->leaf); |
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197 | listremove(proxy,m_stageRoots[proxy->stage]); |
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198 | m_paircache->removeOverlappingPairsContainingProxy(proxy,dispatcher); |
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199 | btAlignedFree(proxy); |
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200 | m_needcleanup=true; |
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201 | } |
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202 | |
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203 | // |
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204 | void btDbvtBroadphase::setAabb( btBroadphaseProxy* absproxy, |
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205 | const btVector3& aabbMin, |
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206 | const btVector3& aabbMax, |
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207 | btDispatcher* /*dispatcher*/) |
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208 | { |
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209 | btDbvtProxy* proxy=(btDbvtProxy*)absproxy; |
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210 | ATTRIBUTE_ALIGNED16(btDbvtVolume) aabb=btDbvtVolume::FromMM(aabbMin,aabbMax); |
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211 | #if DBVT_BP_PREVENTFALSEUPDATE |
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212 | if(NotEqual(aabb,proxy->leaf->volume)) |
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213 | #endif |
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214 | { |
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215 | bool docollide=false; |
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216 | if(proxy->stage==STAGECOUNT) |
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217 | {/* fixed -> dynamic set */ |
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218 | m_sets[1].remove(proxy->leaf); |
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219 | proxy->leaf=m_sets[0].insert(aabb,proxy); |
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220 | docollide=true; |
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221 | } |
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222 | else |
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223 | {/* dynamic set */ |
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224 | ++m_updates_call; |
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225 | if(Intersect(proxy->leaf->volume,aabb)) |
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226 | {/* Moving */ |
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227 | const btVector3 delta=aabbMin-proxy->aabb.Mins(); |
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228 | btVector3 velocity(aabb.Extents()*m_prediction); |
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229 | if(delta[0]<0) velocity[0]=-velocity[0]; |
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230 | if(delta[1]<0) velocity[1]=-velocity[1]; |
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231 | if(delta[2]<0) velocity[2]=-velocity[2]; |
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232 | if ( |
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233 | #ifdef DBVT_BP_MARGIN |
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234 | m_sets[0].update(proxy->leaf,aabb,velocity,DBVT_BP_MARGIN) |
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235 | #else |
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236 | m_sets[0].update(proxy->leaf,aabb,velocity) |
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237 | #endif |
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238 | ) |
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239 | { |
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240 | ++m_updates_done; |
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241 | docollide=true; |
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242 | } |
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243 | } |
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244 | else |
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245 | {/* Teleporting */ |
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246 | m_sets[0].update(proxy->leaf,aabb); |
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247 | ++m_updates_done; |
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248 | docollide=true; |
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249 | } |
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250 | } |
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251 | listremove(proxy,m_stageRoots[proxy->stage]); |
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252 | proxy->aabb = aabb; |
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253 | proxy->stage = m_stageCurrent; |
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254 | listappend(proxy,m_stageRoots[m_stageCurrent]); |
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255 | if(docollide) |
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256 | { |
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257 | m_needcleanup=true; |
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258 | if(!m_deferedcollide) |
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259 | { |
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260 | btDbvtTreeCollider collider(this); |
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261 | btDbvt::collideTT(m_sets[1].m_root,proxy->leaf,collider); |
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262 | btDbvt::collideTT(m_sets[0].m_root,proxy->leaf,collider); |
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263 | } |
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264 | } |
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265 | } |
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266 | } |
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267 | |
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268 | // |
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269 | void btDbvtBroadphase::calculateOverlappingPairs(btDispatcher* dispatcher) |
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270 | { |
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271 | collide(dispatcher); |
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272 | #if DBVT_BP_PROFILE |
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273 | if(0==(m_pid%DBVT_BP_PROFILING_RATE)) |
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274 | { |
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275 | printf("fixed(%u) dynamics(%u) pairs(%u)\r\n",m_sets[1].m_leaves,m_sets[0].m_leaves,m_paircache->getNumOverlappingPairs()); |
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276 | unsigned int total=m_profiling.m_total; |
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277 | if(total<=0) total=1; |
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278 | printf("ddcollide: %u%% (%uus)\r\n",(50+m_profiling.m_ddcollide*100)/total,m_profiling.m_ddcollide/DBVT_BP_PROFILING_RATE); |
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279 | printf("fdcollide: %u%% (%uus)\r\n",(50+m_profiling.m_fdcollide*100)/total,m_profiling.m_fdcollide/DBVT_BP_PROFILING_RATE); |
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280 | printf("cleanup: %u%% (%uus)\r\n",(50+m_profiling.m_cleanup*100)/total,m_profiling.m_cleanup/DBVT_BP_PROFILING_RATE); |
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281 | printf("total: %uus\r\n",total/DBVT_BP_PROFILING_RATE); |
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282 | const unsigned long sum=m_profiling.m_ddcollide+ |
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283 | m_profiling.m_fdcollide+ |
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284 | m_profiling.m_cleanup; |
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285 | printf("leaked: %u%% (%uus)\r\n",100-((50+sum*100)/total),(total-sum)/DBVT_BP_PROFILING_RATE); |
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286 | printf("job counts: %u%%\r\n",(m_profiling.m_jobcount*100)/((m_sets[0].m_leaves+m_sets[1].m_leaves)*DBVT_BP_PROFILING_RATE)); |
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287 | clear(m_profiling); |
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288 | m_clock.reset(); |
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289 | } |
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290 | #endif |
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291 | } |
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292 | |
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293 | // |
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294 | void btDbvtBroadphase::collide(btDispatcher* dispatcher) |
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295 | { |
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296 | SPC(m_profiling.m_total); |
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297 | /* optimize */ |
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298 | m_sets[0].optimizeIncremental(1+(m_sets[0].m_leaves*m_dupdates)/100); |
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299 | if(m_fixedleft) |
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300 | { |
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301 | const int count=1+(m_sets[1].m_leaves*m_fupdates)/100; |
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302 | m_sets[1].optimizeIncremental(1+(m_sets[1].m_leaves*m_fupdates)/100); |
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303 | m_fixedleft=btMax<int>(0,m_fixedleft-count); |
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304 | } |
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305 | /* dynamic -> fixed set */ |
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306 | m_stageCurrent=(m_stageCurrent+1)%STAGECOUNT; |
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307 | btDbvtProxy* current=m_stageRoots[m_stageCurrent]; |
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308 | if(current) |
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309 | { |
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310 | btDbvtTreeCollider collider(this); |
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311 | do { |
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312 | btDbvtProxy* next=current->links[1]; |
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313 | listremove(current,m_stageRoots[current->stage]); |
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314 | listappend(current,m_stageRoots[STAGECOUNT]); |
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315 | #if DBVT_BP_ACCURATESLEEPING |
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316 | m_paircache->removeOverlappingPairsContainingProxy(current,dispatcher); |
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317 | collider.proxy=current; |
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318 | btDbvt::collideTV(m_sets[0].m_root,current->aabb,collider); |
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319 | btDbvt::collideTV(m_sets[1].m_root,current->aabb,collider); |
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320 | #endif |
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321 | m_sets[0].remove(current->leaf); |
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322 | current->leaf = m_sets[1].insert(current->aabb,current); |
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323 | current->stage = STAGECOUNT; |
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324 | current = next; |
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325 | } while(current); |
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326 | m_fixedleft=m_sets[1].m_leaves; |
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327 | m_needcleanup=true; |
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328 | } |
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329 | /* collide dynamics */ |
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330 | { |
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331 | btDbvtTreeCollider collider(this); |
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332 | if(m_deferedcollide) |
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333 | { |
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334 | SPC(m_profiling.m_fdcollide); |
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335 | btDbvt::collideTT(m_sets[0].m_root,m_sets[1].m_root,collider); |
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336 | } |
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337 | if(m_deferedcollide) |
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338 | { |
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339 | SPC(m_profiling.m_ddcollide); |
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340 | btDbvt::collideTT(m_sets[0].m_root,m_sets[0].m_root,collider); |
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341 | } |
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342 | } |
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343 | /* clean up */ |
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344 | if(m_needcleanup) |
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345 | { |
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346 | SPC(m_profiling.m_cleanup); |
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347 | btBroadphasePairArray& pairs=m_paircache->getOverlappingPairArray(); |
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348 | if(pairs.size()>0) |
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349 | { |
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350 | const int ci=pairs.size(); |
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351 | int ni=btMin(ci,btMax<int>(m_newpairs,(ci*m_cupdates)/100)); |
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352 | for(int i=0;i<ni;++i) |
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353 | { |
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354 | btBroadphasePair& p=pairs[(m_cid+i)%ci]; |
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355 | btDbvtProxy* pa=(btDbvtProxy*)p.m_pProxy0; |
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356 | btDbvtProxy* pb=(btDbvtProxy*)p.m_pProxy1; |
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357 | if(!Intersect(pa->leaf->volume,pb->leaf->volume)) |
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358 | { |
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359 | #if DBVT_BP_SORTPAIRS |
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360 | if(pa>pb) btSwap(pa,pb); |
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361 | #endif |
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362 | m_paircache->removeOverlappingPair(pa,pb,dispatcher); |
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363 | --ni;--i; |
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364 | } |
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365 | } |
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366 | if(pairs.size()>0) m_cid=(m_cid+ni)%pairs.size(); else m_cid=0; |
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367 | } |
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368 | } |
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369 | ++m_pid; |
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370 | m_newpairs=1; |
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371 | m_needcleanup=false; |
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372 | if(m_updates_call>0) |
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373 | { m_updates_ratio=m_updates_done/(btScalar)m_updates_call; } |
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374 | else |
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375 | { m_updates_ratio=0; } |
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376 | m_updates_done/=2; |
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377 | m_updates_call/=2; |
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378 | } |
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379 | |
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380 | // |
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381 | void btDbvtBroadphase::optimize() |
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382 | { |
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383 | m_sets[0].optimizeTopDown(); |
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384 | m_sets[1].optimizeTopDown(); |
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385 | } |
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386 | |
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387 | // |
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388 | btOverlappingPairCache* btDbvtBroadphase::getOverlappingPairCache() |
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389 | { |
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390 | return(m_paircache); |
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391 | } |
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392 | |
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393 | // |
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394 | const btOverlappingPairCache* btDbvtBroadphase::getOverlappingPairCache() const |
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395 | { |
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396 | return(m_paircache); |
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397 | } |
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398 | |
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399 | // |
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400 | void btDbvtBroadphase::getBroadphaseAabb(btVector3& aabbMin,btVector3& aabbMax) const |
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401 | { |
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402 | |
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403 | ATTRIBUTE_ALIGNED16(btDbvtVolume) bounds; |
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404 | |
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405 | if(!m_sets[0].empty()) |
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406 | if(!m_sets[1].empty()) Merge( m_sets[0].m_root->volume, |
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407 | m_sets[1].m_root->volume,bounds); |
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408 | else |
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409 | bounds=m_sets[0].m_root->volume; |
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410 | else if(!m_sets[1].empty()) bounds=m_sets[1].m_root->volume; |
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411 | else |
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412 | bounds=btDbvtVolume::FromCR(btVector3(0,0,0),0); |
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413 | aabbMin=bounds.Mins(); |
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414 | aabbMax=bounds.Maxs(); |
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415 | } |
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416 | |
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417 | // |
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418 | void btDbvtBroadphase::printStats() |
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419 | {} |
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420 | |
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421 | // |
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422 | #if DBVT_BP_ENABLE_BENCHMARK |
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423 | |
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424 | struct btBroadphaseBenchmark |
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425 | { |
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426 | struct Experiment |
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427 | { |
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428 | const char* name; |
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429 | int object_count; |
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430 | int update_count; |
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431 | int spawn_count; |
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432 | int iterations; |
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433 | btScalar speed; |
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434 | btScalar amplitude; |
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435 | }; |
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436 | struct Object |
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437 | { |
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438 | btVector3 center; |
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439 | btVector3 extents; |
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440 | btBroadphaseProxy* proxy; |
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441 | btScalar time; |
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442 | void update(btScalar speed,btScalar amplitude,btBroadphaseInterface* pbi) |
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443 | { |
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444 | time += speed; |
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445 | center[0] = btCos(time*(btScalar)2.17)*amplitude+ |
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446 | btSin(time)*amplitude/2; |
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447 | center[1] = btCos(time*(btScalar)1.38)*amplitude+ |
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448 | btSin(time)*amplitude; |
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449 | center[2] = btSin(time*(btScalar)0.777)*amplitude; |
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450 | pbi->setAabb(proxy,center-extents,center+extents,0); |
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451 | } |
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452 | }; |
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453 | static int UnsignedRand(int range=RAND_MAX-1) { return(rand()%(range+1)); } |
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454 | static btScalar UnitRand() { return(UnsignedRand(16384)/(btScalar)16384); } |
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455 | static void OutputTime(const char* name,btClock& c,unsigned count=0) |
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456 | { |
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457 | const unsigned long us=c.getTimeMicroseconds(); |
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458 | const unsigned long ms=(us+500)/1000; |
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459 | const btScalar sec=us/(btScalar)(1000*1000); |
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460 | if(count>0) |
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461 | printf("%s : %u us (%u ms), %.2f/s\r\n",name,us,ms,count/sec); |
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462 | else |
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463 | printf("%s : %u us (%u ms)\r\n",name,us,ms); |
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464 | } |
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465 | }; |
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466 | |
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467 | void btDbvtBroadphase::benchmark(btBroadphaseInterface* pbi) |
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468 | { |
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469 | static const btBroadphaseBenchmark::Experiment experiments[]= |
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470 | { |
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471 | {"1024o.10%",1024,10,0,8192,(btScalar)0.005,(btScalar)100}, |
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472 | /*{"4096o.10%",4096,10,0,8192,(btScalar)0.005,(btScalar)100}, |
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473 | {"8192o.10%",8192,10,0,8192,(btScalar)0.005,(btScalar)100},*/ |
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474 | }; |
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475 | static const int nexperiments=sizeof(experiments)/sizeof(experiments[0]); |
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476 | btAlignedObjectArray<btBroadphaseBenchmark::Object*> objects; |
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477 | btClock wallclock; |
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478 | /* Begin */ |
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479 | for(int iexp=0;iexp<nexperiments;++iexp) |
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480 | { |
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481 | const btBroadphaseBenchmark::Experiment& experiment=experiments[iexp]; |
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482 | const int object_count=experiment.object_count; |
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483 | const int update_count=(object_count*experiment.update_count)/100; |
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484 | const int spawn_count=(object_count*experiment.spawn_count)/100; |
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485 | const btScalar speed=experiment.speed; |
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486 | const btScalar amplitude=experiment.amplitude; |
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487 | printf("Experiment #%u '%s':\r\n",iexp,experiment.name); |
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488 | printf("\tObjects: %u\r\n",object_count); |
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489 | printf("\tUpdate: %u\r\n",update_count); |
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490 | printf("\tSpawn: %u\r\n",spawn_count); |
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491 | printf("\tSpeed: %f\r\n",speed); |
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492 | printf("\tAmplitude: %f\r\n",amplitude); |
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493 | srand(180673); |
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494 | /* Create objects */ |
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495 | wallclock.reset(); |
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496 | objects.reserve(object_count); |
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497 | for(int i=0;i<object_count;++i) |
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498 | { |
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499 | btBroadphaseBenchmark::Object* po=new btBroadphaseBenchmark::Object(); |
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500 | po->center[0]=btBroadphaseBenchmark::UnitRand()*50; |
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501 | po->center[1]=btBroadphaseBenchmark::UnitRand()*50; |
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502 | po->center[2]=btBroadphaseBenchmark::UnitRand()*50; |
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503 | po->extents[0]=btBroadphaseBenchmark::UnitRand()*2+2; |
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504 | po->extents[1]=btBroadphaseBenchmark::UnitRand()*2+2; |
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505 | po->extents[2]=btBroadphaseBenchmark::UnitRand()*2+2; |
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506 | po->time=btBroadphaseBenchmark::UnitRand()*2000; |
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507 | po->proxy=pbi->createProxy(po->center-po->extents,po->center+po->extents,0,po,1,1,0,0); |
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508 | objects.push_back(po); |
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509 | } |
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510 | btBroadphaseBenchmark::OutputTime("\tInitialization",wallclock); |
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511 | /* First update */ |
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512 | wallclock.reset(); |
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513 | for(int i=0;i<objects.size();++i) |
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514 | { |
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515 | objects[i]->update(speed,amplitude,pbi); |
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516 | } |
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517 | btBroadphaseBenchmark::OutputTime("\tFirst update",wallclock); |
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518 | /* Updates */ |
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519 | wallclock.reset(); |
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520 | for(int i=0;i<experiment.iterations;++i) |
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521 | { |
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522 | for(int j=0;j<update_count;++j) |
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523 | { |
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524 | objects[j]->update(speed,amplitude,pbi); |
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525 | } |
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526 | pbi->calculateOverlappingPairs(0); |
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527 | } |
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528 | btBroadphaseBenchmark::OutputTime("\tUpdate",wallclock,experiment.iterations); |
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529 | /* Clean up */ |
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530 | wallclock.reset(); |
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531 | for(int i=0;i<objects.size();++i) |
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532 | { |
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533 | pbi->destroyProxy(objects[i]->proxy,0); |
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534 | delete objects[i]; |
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535 | } |
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536 | objects.resize(0); |
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537 | btBroadphaseBenchmark::OutputTime("\tRelease",wallclock); |
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538 | } |
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539 | |
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540 | } |
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541 | #else |
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542 | void btDbvtBroadphase::benchmark(btBroadphaseInterface*) |
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543 | {} |
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544 | #endif |
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545 | |
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546 | #if DBVT_BP_PROFILE |
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547 | #undef SPC |
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548 | #endif |
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