![]() |
Box2D
2.2.1
A 2D Physics Engine for Games
|
#include <b2PrismaticJoint.h>
Public Member Functions | |
b2Vec2 | GetAnchorA () const |
Get the anchor point on bodyA in world coordinates. | |
b2Vec2 | GetAnchorB () const |
Get the anchor point on bodyB in world coordinates. | |
b2Vec2 | GetReactionForce (float32 inv_dt) const |
Get the reaction force on bodyB at the joint anchor in Newtons. | |
float32 | GetReactionTorque (float32 inv_dt) const |
Get the reaction torque on bodyB in N*m. | |
const b2Vec2 & | GetLocalAnchorA () const |
The local anchor point relative to bodyA's origin. | |
const b2Vec2 & | GetLocalAnchorB () const |
The local anchor point relative to bodyB's origin. | |
const b2Vec2 & | GetLocalAxisA () const |
The local joint axis relative to bodyA. | |
float32 | GetReferenceAngle () const |
Get the reference angle. | |
float32 | GetJointTranslation () const |
Get the current joint translation, usually in meters. | |
float32 | GetJointSpeed () const |
Get the current joint translation speed, usually in meters per second. | |
bool | IsLimitEnabled () const |
Is the joint limit enabled? | |
void | EnableLimit (bool flag) |
Enable/disable the joint limit. | |
float32 | GetLowerLimit () const |
Get the lower joint limit, usually in meters. | |
float32 | GetUpperLimit () const |
Get the upper joint limit, usually in meters. | |
void | SetLimits (float32 lower, float32 upper) |
Set the joint limits, usually in meters. | |
bool | IsMotorEnabled () const |
Is the joint motor enabled? | |
void | EnableMotor (bool flag) |
Enable/disable the joint motor. | |
void | SetMotorSpeed (float32 speed) |
Set the motor speed, usually in meters per second. | |
float32 | GetMotorSpeed () const |
Get the motor speed, usually in meters per second. | |
void | SetMaxMotorForce (float32 force) |
Set the maximum motor force, usually in N. | |
float32 | GetMaxMotorForce () const |
float32 | GetMotorForce (float32 inv_dt) const |
Get the current motor force given the inverse time step, usually in N. | |
void | Dump () |
Dump to b2Log. | |
Protected Member Functions | |
b2PrismaticJoint (const b2PrismaticJointDef *def) | |
void | InitVelocityConstraints (const b2SolverData &data) |
void | SolveVelocityConstraints (const b2SolverData &data) |
bool | SolvePositionConstraints (const b2SolverData &data) |
Protected Attributes | |
b2Vec2 | m_localAnchorA |
b2Vec2 | m_localAnchorB |
b2Vec2 | m_localXAxisA |
b2Vec2 | m_localYAxisA |
float32 | m_referenceAngle |
b2Vec3 | m_impulse |
float32 | m_motorImpulse |
float32 | m_lowerTranslation |
float32 | m_upperTranslation |
float32 | m_maxMotorForce |
float32 | m_motorSpeed |
bool | m_enableLimit |
bool | m_enableMotor |
b2LimitState | m_limitState |
int32 | m_indexA |
int32 | m_indexB |
b2Vec2 | m_localCenterA |
b2Vec2 | m_localCenterB |
float32 | m_invMassA |
float32 | m_invMassB |
float32 | m_invIA |
float32 | m_invIB |
b2Vec2 | m_axis |
b2Vec2 | m_perp |
float32 | m_s1 |
float32 | m_s2 |
float32 | m_a1 |
float32 | m_a2 |
b2Mat33 | m_K |
float32 | m_motorMass |
Friends | |
class | b2Joint |
class | b2GearJoint |
A prismatic joint. This joint provides one degree of freedom: translation along an axis fixed in bodyA. Relative rotation is prevented. You can use a joint limit to restrict the range of motion and a joint motor to drive the motion or to model joint friction.