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Diffstat (limited to 'extern/bullet2/src/BulletDynamics/ConstraintSolver/btGeneric6DofSpringConstraint.h')
| -rw-r--r-- | extern/bullet2/src/BulletDynamics/ConstraintSolver/btGeneric6DofSpringConstraint.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/extern/bullet2/src/BulletDynamics/ConstraintSolver/btGeneric6DofSpringConstraint.h b/extern/bullet2/src/BulletDynamics/ConstraintSolver/btGeneric6DofSpringConstraint.h new file mode 100644 index 00000000000..16ff973e427 --- /dev/null +++ b/extern/bullet2/src/BulletDynamics/ConstraintSolver/btGeneric6DofSpringConstraint.h @@ -0,0 +1,97 @@ +/* +Bullet Continuous Collision Detection and Physics Library, http://bulletphysics.org +Copyright (C) 2006, 2007 Sony Computer Entertainment Inc. + +This software is provided 'as-is', without any express or implied warranty. +In no event will the authors be held liable for any damages arising from the use of this software. +Permission is granted to anyone to use this software for any purpose, +including commercial applications, and to alter it and redistribute it freely, +subject to the following restrictions: + +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. +2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. +3. This notice may not be removed or altered from any source distribution. +*/ + +#ifndef GENERIC_6DOF_SPRING_CONSTRAINT_H +#define GENERIC_6DOF_SPRING_CONSTRAINT_H + + +#include "LinearMath/btVector3.h" +#include "btTypedConstraint.h" +#include "btGeneric6DofConstraint.h" + + +/// Generic 6 DOF constraint that allows to set spring motors to any translational and rotational DOF + +/// DOF index used in enableSpring() and setStiffness() means: +/// 0 : translation X +/// 1 : translation Y +/// 2 : translation Z +/// 3 : rotation X (3rd Euler rotational around new position of X axis, range [-PI+epsilon, PI-epsilon] ) +/// 4 : rotation Y (2nd Euler rotational around new position of Y axis, range [-PI/2+epsilon, PI/2-epsilon] ) +/// 5 : rotation Z (1st Euler rotational around Z axis, range [-PI+epsilon, PI-epsilon] ) + +class btGeneric6DofSpringConstraint : public btGeneric6DofConstraint +{ +protected: + bool m_springEnabled[6]; + btScalar m_equilibriumPoint[6]; + btScalar m_springStiffness[6]; + btScalar m_springDamping[6]; // between 0 and 1 (1 == no damping) + void internalUpdateSprings(btConstraintInfo2* info); +public: + btGeneric6DofSpringConstraint(btRigidBody& rbA, btRigidBody& rbB, const btTransform& frameInA, const btTransform& frameInB ,bool useLinearReferenceFrameA); + void enableSpring(int index, bool onOff); + void setStiffness(int index, btScalar stiffness); + void setDamping(int index, btScalar damping); + void setEquilibriumPoint(); // set the current constraint position/orientation as an equilibrium point for all DOF + void setEquilibriumPoint(int index); // set the current constraint position/orientation as an equilibrium point for given DOF + void setEquilibriumPoint(int index, btScalar val); + + virtual void setAxis( const btVector3& axis1, const btVector3& axis2); + + virtual void getInfo2 (btConstraintInfo2* info); + + virtual int calculateSerializeBufferSize() const; + ///fills the dataBuffer and returns the struct name (and 0 on failure) + virtual const char* serialize(void* dataBuffer, btSerializer* serializer) const; + +}; + + +///do not change those serialization structures, it requires an updated sBulletDNAstr/sBulletDNAstr64 +struct btGeneric6DofSpringConstraintData +{ + btGeneric6DofConstraintData m_6dofData; + + int m_springEnabled[6]; + float m_equilibriumPoint[6]; + float m_springStiffness[6]; + float m_springDamping[6]; +}; + +SIMD_FORCE_INLINE int btGeneric6DofSpringConstraint::calculateSerializeBufferSize() const +{ + return sizeof(btGeneric6DofSpringConstraintData); +} + + ///fills the dataBuffer and returns the struct name (and 0 on failure) +SIMD_FORCE_INLINE const char* btGeneric6DofSpringConstraint::serialize(void* dataBuffer, btSerializer* serializer) const +{ + btGeneric6DofSpringConstraintData* dof = (btGeneric6DofSpringConstraintData*)dataBuffer; + btGeneric6DofConstraint::serialize(&dof->m_6dofData,serializer); + + int i; + for (i=0;i<6;i++) + { + dof->m_equilibriumPoint[i] = m_equilibriumPoint[i]; + dof->m_springDamping[i] = m_springDamping[i]; + dof->m_springEnabled[i] = m_springEnabled[i]? 1 : 0; + dof->m_springStiffness[i] = m_springStiffness[i]; + } + return "btGeneric6DofConstraintData"; +} + +#endif // GENERIC_6DOF_SPRING_CONSTRAINT_H + |