Package org.jbox2d.dynamics.joints
Class PrismaticJointDef
- java.lang.Object
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- org.jbox2d.dynamics.joints.JointDef
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- org.jbox2d.dynamics.joints.PrismaticJointDef
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public class PrismaticJointDef extends JointDef
Prismatic joint definition. This requires defining a line of motion using an axis and an anchor point. The definition uses local anchor points and a local axis so that the initial configuration can violate the constraint slightly. The joint translation is zero when the local anchor points coincide in world space. Using local anchors and a local axis helps when saving and loading a game.
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Field Summary
Fields Modifier and Type Field Description boolean
enableLimit
Enable/disable the joint limit.boolean
enableMotor
Enable/disable the joint motor.Vec2
localAnchorA
The local anchor point relative to body1's origin.Vec2
localAnchorB
The local anchor point relative to body2's origin.Vec2
localAxisA
The local translation axis in body1.float
lowerTranslation
The lower translation limit, usually in meters.float
maxMotorForce
The maximum motor torque, usually in N-m.float
motorSpeed
The desired motor speed in radians per second.float
referenceAngle
The constrained angle between the bodies: body2_angle - body1_angle.float
upperTranslation
The upper translation limit, usually in meters.
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Constructor Summary
Constructors Constructor Description PrismaticJointDef()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
initialize(Body b1, Body b2, Vec2 anchor, Vec2 axis)
Initialize the bodies, anchors, axis, and reference angle using the world anchor and world axis.
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Field Detail
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localAnchorA
public final Vec2 localAnchorA
The local anchor point relative to body1's origin.
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localAnchorB
public final Vec2 localAnchorB
The local anchor point relative to body2's origin.
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localAxisA
public final Vec2 localAxisA
The local translation axis in body1.
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referenceAngle
public float referenceAngle
The constrained angle between the bodies: body2_angle - body1_angle.
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enableLimit
public boolean enableLimit
Enable/disable the joint limit.
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lowerTranslation
public float lowerTranslation
The lower translation limit, usually in meters.
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upperTranslation
public float upperTranslation
The upper translation limit, usually in meters.
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enableMotor
public boolean enableMotor
Enable/disable the joint motor.
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maxMotorForce
public float maxMotorForce
The maximum motor torque, usually in N-m.
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motorSpeed
public float motorSpeed
The desired motor speed in radians per second.
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