PxJointLinearLimit

Defined in include/extensions/PxJointLimit.h

class PxJointLinearLimit : public PxJointLimitParameters 

Describes a one-sided linear limit.

Public Functions

inline PxJointLinearLimit(PxReal extent)

construct a linear hard limit

See also

PxJointLimitParameters

Parameters

extent – [in] the extent of the limit
spring – [in] the stiffness and damping parameters for the limit spring

inline bool isValid() const

Returns true if the limit is valid.

Returns: true if the current settings are valid

inline bool isSoft() const

Public Members

PxReal value

the extent of the limit.

Range: (0, PX_MAX_F32) Default: PX_MAX_F32

PxReal restitution

Controls the amount of bounce when the joint hits a limit.

A restitution value of 1.0 causes the joint to bounce back with the velocity which it hit the limit. A value of zero causes the joint to stop dead.

In situations where the joint has many locked DOFs (e.g. 5) the restitution may not be applied correctly. This is due to a limitation in the solver which causes the restitution velocity to become zero as the solver enforces constraints on the other DOFs.

This limitation applies to both angular and linear limits, however it is generally most apparent with limited angular DOFs. Disabling joint projection and increasing the solver iteration count may improve this behavior to some extent.

Also, combining soft joint limits with joint drives driving against those limits may affect stability.

Range: [0,1]Default: 0.0

PxReal bounceThreshold: determines the minimum impact velocity which will cause the joint to bounce

PxReal stiffness

if greater than zero, the limit is soft, i.e.

a spring pulls the joint back to the limit

Range: [0, PX_MAX_F32)Default: 0.0

PxReal damping

if spring is greater than zero, this is the damping of the limit spring

Range: [0, PX_MAX_F32)Default: 0.0