Bullet Collision Detection & Physics Library
btMultiBodyLinkCollider.h
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1 /*
2 Bullet Continuous Collision Detection and Physics Library
3 Copyright (c) 2013 Erwin Coumans http://bulletphysics.org
4 
5 This software is provided 'as-is', without any express or implied warranty.
6 In no event will the authors be held liable for any damages arising from the use of this software.
7 Permission is granted to anyone to use this software for any purpose,
8 including commercial applications, and to alter it and redistribute it freely,
9 subject to the following restrictions:
10 
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.
12 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
13 3. This notice may not be removed or altered from any source distribution.
14 */
15 
16 #ifndef BT_FEATHERSTONE_LINK_COLLIDER_H
17 #define BT_FEATHERSTONE_LINK_COLLIDER_H
18 
20 
21 #include "btMultiBody.h"
23 
24 #ifdef BT_USE_DOUBLE_PRECISION
25 #define btMultiBodyLinkColliderData btMultiBodyLinkColliderDoubleData
26 #define btMultiBodyLinkColliderDataName "btMultiBodyLinkColliderDoubleData"
27 #else
28 #define btMultiBodyLinkColliderData btMultiBodyLinkColliderFloatData
29 #define btMultiBodyLinkColliderDataName "btMultiBodyLinkColliderFloatData"
30 #endif
31 
33 {
34  //protected:
35 public:
37  int m_link;
38 
40  {
41 
42  }
43  btMultiBodyLinkCollider(btMultiBody* multiBody, int link)
44  : m_multiBody(multiBody),
45  m_link(link)
46  {
47  m_checkCollideWith = true;
48  //we need to remove the 'CF_STATIC_OBJECT' flag, otherwise links/base doesn't merge islands
49  //this means that some constraints might point to bodies that are not in the islands, causing crashes
50  //if (link>=0 || (multiBody && !multiBody->hasFixedBase()))
51  {
53  }
54  // else
55  //{
56  // m_collisionFlags |= (btCollisionObject::CF_STATIC_OBJECT);
57  //}
58 
60  }
62  {
64  return (btMultiBodyLinkCollider*)colObj;
65  return 0;
66  }
67  static const btMultiBodyLinkCollider* upcast(const btCollisionObject* colObj)
68  {
70  return (btMultiBodyLinkCollider*)colObj;
71  return 0;
72  }
73 
74  virtual bool checkCollideWithOverride(const btCollisionObject* co) const
75  {
77  if (!other)
78  return true;
79  if (other->m_multiBody != this->m_multiBody)
80  return true;
82  return false;
83 
84  //check if 'link' has collision disabled
85  if (m_link >= 0)
86  {
87  const btMultibodyLink& link = m_multiBody->getLink(this->m_link);
89  {
90  int parent_of_this = m_link;
91  while (1)
92  {
93  if (parent_of_this == -1)
94  break;
95  parent_of_this = m_multiBody->getLink(parent_of_this).m_parent;
96  if (parent_of_this == other->m_link)
97  {
98  return false;
99  }
100  }
101  }
103  {
104  if (link.m_parent == other->m_link)
105  return false;
106  }
107  }
108 
109  if (other->m_link >= 0)
110  {
111  const btMultibodyLink& otherLink = other->m_multiBody->getLink(other->m_link);
113  {
114  int parent_of_other = other->m_link;
115  while (1)
116  {
117  if (parent_of_other == -1)
118  break;
119  parent_of_other = m_multiBody->getLink(parent_of_other).m_parent;
120  if (parent_of_other == this->m_link)
121  return false;
122  }
123  }
125  {
126  if (otherLink.m_parent == this->m_link)
127  return false;
128  }
129  }
130  return true;
131  }
132 
133  bool isStaticOrKinematic() const
134  {
135  return isStaticOrKinematicObject();
136  }
137 
138  bool isKinematic() const
139  {
140  return isKinematicObject();
141  }
142 
143  void setDynamicType(int dynamicType)
144  {
145  int oldFlags = getCollisionFlags();
147  setCollisionFlags(oldFlags | dynamicType);
148  }
149 
150  virtual int calculateSerializeBufferSize() const;
151 
153  virtual const char* serialize(void* dataBuffer, class btSerializer* serializer) const;
154 };
155 
156 // clang-format off
157 
159 {
162  int m_link;
163  char m_padding[4];
164 };
165 
167 {
170  int m_link;
171  char m_padding[4];
172 };
173 
174 // clang-format on
175 
177 {
178  return sizeof(btMultiBodyLinkColliderData);
179 }
180 
181 SIMD_FORCE_INLINE const char* btMultiBodyLinkCollider::serialize(void* dataBuffer, class btSerializer* serializer) const
182 {
184  btCollisionObject::serialize(&dataOut->m_colObjData, serializer);
185 
186  dataOut->m_link = this->m_link;
187  dataOut->m_multiBody = (btMultiBodyData*)serializer->getUniquePointer(m_multiBody);
188 
189  // Fill padding with zeros to appease msan.
190  memset(dataOut->m_padding, 0, sizeof(dataOut->m_padding));
191 
193 }
194 
195 #endif //BT_FEATHERSTONE_LINK_COLLIDER_H
#define btMultiBodyLinkColliderData
#define btMultiBodyLinkColliderDataName
#define btMultiBodyData
serialization data, don't change them if you are not familiar with the details of the serialization m...
Definition: btMultiBody.h:40
#define SIMD_FORCE_INLINE
Definition: btScalar.h:98
btCollisionObject can be used to manage collision detection objects.
bool isStaticOrKinematicObject() const
virtual const char * serialize(void *dataBuffer, class btSerializer *serializer) const
fills the dataBuffer and returns the struct name (and 0 on failure)
void setCollisionFlags(int flags)
int m_checkCollideWith
If some object should have elaborate collision filtering by sub-classes.
int getInternalType() const
reserved for Bullet internal usage
int m_internalType
m_internalType is reserved to distinguish Bullet's btCollisionObject, btRigidBody,...
bool isKinematicObject() const
int getCollisionFlags() const
btMultiBodyLinkCollider(btMultiBody *multiBody, int link)
virtual int calculateSerializeBufferSize() const
static const btMultiBodyLinkCollider * upcast(const btCollisionObject *colObj)
virtual bool checkCollideWithOverride(const btCollisionObject *co) const
virtual const char * serialize(void *dataBuffer, class btSerializer *serializer) const
fills the dataBuffer and returns the struct name (and 0 on failure)
static btMultiBodyLinkCollider * upcast(btCollisionObject *colObj)
void setDynamicType(int dynamicType)
bool hasSelfCollision() const
Definition: btMultiBody.h:635
const btMultibodyLink & getLink(int index) const
Definition: btMultiBody.h:114
virtual void * getUniquePointer(void *oldPtr)=0
do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
Definition: btMultiBody.h:921
do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64
Definition: btMultiBody.h:938
btCollisionObjectDoubleData m_colObjData
btCollisionObjectFloatData m_colObjData