WHAT IS
3D RAD?
CLICK HERE
TO FIND OUT!
Joint
Link objects together to form physics-law-obeying systems as simple as a pendulum or as complex as a ragdoll!
Joint's rotational limits can be set and angular forces can be defined to simulate motors and advanced mechanisms.
Direction and orientation of the joint can be visually set in the Virtual Editor.
If this option is not checked, the junction will be enabled only when the Joint object is started by another object, like for example EventOnInput.
In this case, the joint location will be relative to the reference object (see Relationships, below).
That is, while the application point for the reference object is the relative location you defined in the Virtual Editor, for the second object (body B), the application point will depend on object's location at the time of Joint activation.
For each local axis of the Joint object (red arm is +X, green is +Y, blue is +Z) you can define the rotational limits, in degrees.
Setting these limits to -180 and +180 actually disables the stop.
NOTE: due to simulation limitations, you may not be able to completely block rotations about all axes by setting rotational limits alone. The recommended workaround is using three Joint objects with no rotational limits set instead.
NOTE: rotational limits have no effect if one of the two linked objects is static (infinite total mass, see RigidBody).
NOTE: rotational limits make the simulation more complex to compute and therefore may affect frame-rate on slower computers.
Important! Joint stops simulation is based on Euler angles math and therefore it has the following limitation: you cannot set Z-axis limits below -90 or above 90, unless X-axis limits or Y-axis limits (or both) are zero. Failing to do so may severely disrupt the simulation.
These two parameters determine the behavior of the stop (see Angular limits, above).
The bigger the strength factor, the stronger the stop. A strong stop will resist torques more than a weak stop. By default, stop strength is 40000 (very strong).
The bigger the hardness factor, the harder the stop. A soft stop will 'absorb' torques in a spongy way. By default, stop hardness is 150000 (very hard).
You can achieve soft stops by setting both strength and hardness to lower values (for example 5.0 and 0.01 respectively).
You can apply a torque to the linked objects, about each local axis of the Joint object.
The spin factor is the reference angular velocity the motor will try to reach and keep, in degrees per second.
The torque factor is the angular force applied to reach and keep the specified spin. Setting this value to zero actually disables the motor.
NOTE: motors have no effect if one of the two linked objects is static (infinite total mass, see RigidBody).
This list defines how the Joint object relates to the objects linked to it. The following relationship types are supported:
NOTE: Specifying more than one single object as body A or more than one single object as body B is not recommended. Resulting behavior is undefined.
They are explained here.
The following internal parameters can be accessed by using event objects like EventOnValue or Script:
