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Diffstat (limited to 'extern/bullet2/BulletDynamics/Vehicle/btRaycastVehicle.h')
| -rw-r--r-- | extern/bullet2/BulletDynamics/Vehicle/btRaycastVehicle.h | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/extern/bullet2/BulletDynamics/Vehicle/btRaycastVehicle.h b/extern/bullet2/BulletDynamics/Vehicle/btRaycastVehicle.h new file mode 100644 index 00000000000..5ce80f4d275 --- /dev/null +++ b/extern/bullet2/BulletDynamics/Vehicle/btRaycastVehicle.h @@ -0,0 +1,236 @@ +/* + * Copyright (c) 2005 Erwin Coumans http://continuousphysics.com/Bullet/ + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies. + * Erwin Coumans makes no representations about the suitability + * of this software for any purpose. + * It is provided "as is" without express or implied warranty. +*/ +#ifndef RAYCASTVEHICLE_H +#define RAYCASTVEHICLE_H + +#include "BulletDynamics/Dynamics/btRigidBody.h" +#include "BulletDynamics/ConstraintSolver/btTypedConstraint.h" +#include "btVehicleRaycaster.h" +class btDynamicsWorld; +#include "LinearMath/btAlignedObjectArray.h" +#include "btWheelInfo.h" +#include "BulletDynamics/Dynamics/btActionInterface.h" + +class btVehicleTuning; + +///rayCast vehicle, very special constraint that turn a rigidbody into a vehicle. +class btRaycastVehicle : public btActionInterface +{ + + btAlignedObjectArray<btVector3> m_forwardWS; + btAlignedObjectArray<btVector3> m_axle; + btAlignedObjectArray<btScalar> m_forwardImpulse; + btAlignedObjectArray<btScalar> m_sideImpulse; + + ///backwards compatibility + int m_userConstraintType; + int m_userConstraintId; + +public: + class btVehicleTuning + { + public: + + btVehicleTuning() + :m_suspensionStiffness(btScalar(5.88)), + m_suspensionCompression(btScalar(0.83)), + m_suspensionDamping(btScalar(0.88)), + m_maxSuspensionTravelCm(btScalar(500.)), + m_frictionSlip(btScalar(10.5)), + m_maxSuspensionForce(btScalar(6000.)) + { + } + btScalar m_suspensionStiffness; + btScalar m_suspensionCompression; + btScalar m_suspensionDamping; + btScalar m_maxSuspensionTravelCm; + btScalar m_frictionSlip; + btScalar m_maxSuspensionForce; + + }; +private: + + btScalar m_tau; + btScalar m_damping; + btVehicleRaycaster* m_vehicleRaycaster; + btScalar m_pitchControl; + btScalar m_steeringValue; + btScalar m_currentVehicleSpeedKmHour; + + btRigidBody* m_chassisBody; + + int m_indexRightAxis; + int m_indexUpAxis; + int m_indexForwardAxis; + + void defaultInit(const btVehicleTuning& tuning); + +public: + + //constructor to create a car from an existing rigidbody + btRaycastVehicle(const btVehicleTuning& tuning,btRigidBody* chassis, btVehicleRaycaster* raycaster ); + + virtual ~btRaycastVehicle() ; + + + ///btActionInterface interface + virtual void updateAction( btCollisionWorld* collisionWorld, btScalar step) + { + (void) collisionWorld; + updateVehicle(step); + } + + + ///btActionInterface interface + void debugDraw(btIDebugDraw* debugDrawer); + + const btTransform& getChassisWorldTransform() const; + + btScalar rayCast(btWheelInfo& wheel); + + virtual void updateVehicle(btScalar step); + + + void resetSuspension(); + + btScalar getSteeringValue(int wheel) const; + + void setSteeringValue(btScalar steering,int wheel); + + + void applyEngineForce(btScalar force, int wheel); + + const btTransform& getWheelTransformWS( int wheelIndex ) const; + + void updateWheelTransform( int wheelIndex, bool interpolatedTransform = true ); + + void setRaycastWheelInfo( int wheelIndex , bool isInContact, const btVector3& hitPoint, const btVector3& hitNormal,btScalar depth); + + btWheelInfo& addWheel( const btVector3& connectionPointCS0, const btVector3& wheelDirectionCS0,const btVector3& wheelAxleCS,btScalar suspensionRestLength,btScalar wheelRadius,const btVehicleTuning& tuning, bool isFrontWheel); + + inline int getNumWheels() const { + return int (m_wheelInfo.size()); + } + + btAlignedObjectArray<btWheelInfo> m_wheelInfo; + + + const btWheelInfo& getWheelInfo(int index) const; + + btWheelInfo& getWheelInfo(int index); + + void updateWheelTransformsWS(btWheelInfo& wheel , bool interpolatedTransform = true); + + + void setBrake(btScalar brake,int wheelIndex); + + void setPitchControl(btScalar pitch) + { + m_pitchControl = pitch; + } + + void updateSuspension(btScalar deltaTime); + + virtual void updateFriction(btScalar timeStep); + + + + inline btRigidBody* getRigidBody() + { + return m_chassisBody; + } + + const btRigidBody* getRigidBody() const + { + return m_chassisBody; + } + + inline int getRightAxis() const + { + return m_indexRightAxis; + } + inline int getUpAxis() const + { + return m_indexUpAxis; + } + + inline int getForwardAxis() const + { + return m_indexForwardAxis; + } + + + ///Worldspace forward vector + btVector3 getForwardVector() const + { + const btTransform& chassisTrans = getChassisWorldTransform(); + + btVector3 forwardW ( + chassisTrans.getBasis()[0][m_indexForwardAxis], + chassisTrans.getBasis()[1][m_indexForwardAxis], + chassisTrans.getBasis()[2][m_indexForwardAxis]); + + return forwardW; + } + + ///Velocity of vehicle (positive if velocity vector has same direction as foward vector) + btScalar getCurrentSpeedKmHour() const + { + return m_currentVehicleSpeedKmHour; + } + + virtual void setCoordinateSystem(int rightIndex,int upIndex,int forwardIndex) + { + m_indexRightAxis = rightIndex; + m_indexUpAxis = upIndex; + m_indexForwardAxis = forwardIndex; + } + + + ///backwards compatibility + int getUserConstraintType() const + { + return m_userConstraintType ; + } + + void setUserConstraintType(int userConstraintType) + { + m_userConstraintType = userConstraintType; + }; + + void setUserConstraintId(int uid) + { + m_userConstraintId = uid; + } + + int getUserConstraintId() const + { + return m_userConstraintId; + } + +}; + +class btDefaultVehicleRaycaster : public btVehicleRaycaster +{ + btDynamicsWorld* m_dynamicsWorld; +public: + btDefaultVehicleRaycaster(btDynamicsWorld* world) + :m_dynamicsWorld(world) + { + } + + virtual void* castRay(const btVector3& from,const btVector3& to, btVehicleRaycasterResult& result); + +}; + + +#endif //RAYCASTVEHICLE_H + |