# ConeTwistJoint¶

Inherits: Joint < Spatial < Node < Object

Category: Core

## Brief Description¶

A twist joint between two 3D bodies.

## Properties¶

 float bias 0.3 float relaxation 1 float softness 0.8 float swing_span 45 float twist_span 180

## Methods¶

 float get_param ( Param param ) const void set_param ( Param param, float value )

## Enumerations¶

enum Param:

• PARAM_SWING_SPAN = 0 — Swing is rotation from side to side, around the axis perpendicular to the twist axis.

The swing span defines, how much rotation will not get corrected along the swing axis.

Could be defined as looseness in the `ConeTwistJoint`.

If below 0.05, this behavior is locked.

• PARAM_TWIST_SPAN = 1 — Twist is the rotation around the twist axis, this value defined how far the joint can twist.

Twist is locked if below 0.05.

• PARAM_BIAS = 2 — The speed with which the swing or twist will take place.

The higher, the faster.

• PARAM_SOFTNESS = 3 — The ease with which the joint starts to twist. If it’s too low, it takes more force to start twisting the joint.
• PARAM_RELAXATION = 4 — Defines, how fast the swing- and twist-speed-difference on both sides gets synced.
• PARAM_MAX = 5 — Represents the size of the Param enum.

## Description¶

The joint can rotate the bodies across an axis defined by the local x-axes of the Joint.

The twist axis is initiated as the X axis of the Joint.

Once the Bodies swing, the twist axis is calculated as the middle of the x-axes of the Joint in the local space of the two Bodies.

## Property Descriptions¶

 Default 0.3 Setter set_param(value) Getter get_param()

The speed with which the swing or twist will take place.

The higher, the faster.

 Default 1.0 Setter set_param(value) Getter get_param()

Defines, how fast the swing- and twist-speed-difference on both sides gets synced.

 Default 0.8 Setter set_param(value) Getter get_param()

The ease with which the joint starts to twist. If it’s too low, it takes more force to start twisting the joint.

 Default 45

Swing is rotation from side to side, around the axis perpendicular to the twist axis.

The swing span defines, how much rotation will not get corrected along the swing axis.

Could be defined as looseness in the `ConeTwistJoint`.

If below 0.05, this behavior is locked.

 Default 180

Twist is the rotation around the twist axis, this value defined how far the joint can twist.

Twist is locked if below 0.05.