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Box2D
2.4.1
A 2D physics engine for games
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Box2D
2.4.1
A 2D physics engine for games
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#include <b2_gear_joint.h>
Public Member Functions | |
| b2Vec2 | GetAnchorA () const override |
| Get the anchor point on bodyA in world coordinates. | |
| b2Vec2 | GetAnchorB () const override |
| Get the anchor point on bodyB in world coordinates. | |
| b2Vec2 | GetReactionForce (float inv_dt) const override |
| Get the reaction force on bodyB at the joint anchor in Newtons. | |
| float | GetReactionTorque (float inv_dt) const override |
| Get the reaction torque on bodyB in N*m. | |
| b2Joint * | GetJoint1 () |
| Get the first joint. | |
| b2Joint * | GetJoint2 () |
| Get the second joint. | |
| void | SetRatio (float ratio) |
| Set/Get the gear ratio. | |
| float | GetRatio () const |
| void | Dump () override |
| Dump joint to dmLog. | |
 Public Member Functions inherited from b2Joint | |
| b2JointType | GetType () const |
| Get the type of the concrete joint. | |
| b2Body * | GetBodyA () |
| Get the first body attached to this joint. | |
| b2Body * | GetBodyB () |
| Get the second body attached to this joint. | |
| b2Joint * | GetNext () |
| Get the next joint the world joint list. | |
| const b2Joint * | GetNext () const |
| b2JointUserData & | GetUserData () |
| Get the user data pointer. | |
| bool | IsEnabled () const |
| Short-cut function to determine if either body is enabled. | |
| bool | GetCollideConnected () const |
| virtual void | ShiftOrigin (const b2Vec2 &newOrigin) |
| Shift the origin for any points stored in world coordinates. | |
| virtual void | Draw (b2Draw *draw) const |
| Debug draw this joint. | |
Protected Member Functions | |
| b2GearJoint (const b2GearJointDef *data) | |
| void | InitVelocityConstraints (const b2SolverData &data) override |
| void | SolveVelocityConstraints (const b2SolverData &data) override |
| bool | SolvePositionConstraints (const b2SolverData &data) override |
| Protected Member Functions inherited from b2Joint | |
| b2Joint (const b2JointDef *def) | |
Protected Attributes | |
| b2Joint * | m_joint1 |
| b2Joint * | m_joint2 |
| b2JointType | m_typeA |
| b2JointType | m_typeB |
| b2Body * | m_bodyC |
| b2Body * | m_bodyD |
| b2Vec2 | m_localAnchorA |
| b2Vec2 | m_localAnchorB |
| b2Vec2 | m_localAnchorC |
| b2Vec2 | m_localAnchorD |
| b2Vec2 | m_localAxisC |
| b2Vec2 | m_localAxisD |
| float | m_referenceAngleA |
| float | m_referenceAngleB |
| float | m_constant |
| float | m_ratio |
| float | m_impulse |
| int32 | m_indexA |
| int32 | m_indexB |
| int32 | m_indexC |
| int32 | m_indexD |
| b2Vec2 | m_lcA |
| b2Vec2 | m_lcB |
| b2Vec2 | m_lcC |
| b2Vec2 | m_lcD |
| float | m_mA |
| float | m_mB |
| float | m_mC |
| float | m_mD |
| float | m_iA |
| float | m_iB |
| float | m_iC |
| float | m_iD |
| b2Vec2 | m_JvAC |
| b2Vec2 | m_JvBD |
| float | m_JwA |
| float | m_JwB |
| float | m_JwC |
| float | m_JwD |
| float | m_mass |
| Protected Attributes inherited from b2Joint | |
| b2JointType | m_type |
| b2Joint * | m_prev |
| b2Joint * | m_next |
| b2JointEdge | m_edgeA |
| b2JointEdge | m_edgeB |
| b2Body * | m_bodyA |
| b2Body * | m_bodyB |
| int32 | m_index |
| bool | m_islandFlag |
| bool | m_collideConnected |
| b2JointUserData | m_userData |
Friends | |
| class | b2Joint |
Additional Inherited Members | |
| Static Protected Member Functions inherited from b2Joint | |
| static b2Joint * | Create (const b2JointDef *def, b2BlockAllocator *allocator) |
| static void | Destroy (b2Joint *joint, b2BlockAllocator *allocator) |
A gear joint is used to connect two joints together. Either joint can be a revolute or prismatic joint. You specify a gear ratio to bind the motions together: coordinate1 + ratio * coordinate2 = constant The ratio can be negative or positive. If one joint is a revolute joint and the other joint is a prismatic joint, then the ratio will have units of length or units of 1/length.
1.8.17