...
- Active and passive rigid bodies, and soft bodies can be connected without restrictions.
- A rigid/soft body can be part of multiple MultiJoints nodes.
- It is possible to connected the individual objects inside a MultiBody.
Basic
...
Setup – Scene
...
In this example we go through a scene with a fractured object:
...
Objects can only be linked when they have a dynamics tag – you find this function under MultiBody > Node Params > Node > Simulation > Active rigid body
- Add a cube and rescale it to create a ground or floor object: Cube01 > Node Params > Node Simulation > Passive rigid body.
- Shift the MultiBody with the fragments above the ground cube (W key) and rotate (E key) it. Finally, add a "Gravity" daemon from the appropriate shelf.
Basic
...
Setup – MultiJoint Settings
Create a MultiJoint node from the "Object Dynamics" shelf:
- Add the fractured MultiBody to the "Objects A" and "Objects B" fields of the MultiJoint's "Creation" fields.
- Press "Create/Recreate(*)" to establish the connection. The * indicates that it is necessary to create/update the joints.
...
Image: screenshot from multijoint "Create" tab
- Adjust the MultiJoints node's properties
...
- Forces > Force max mode > Constant limit
- Forces > Max force > 500000
- Collisions > Enable if break > Yes
- Break > Break if distance exceeded > Yes
...
- as shown below and hit "Simulate".
The joints between the fragments are displayed as green (= intact) crosses and they change their colour during simulation: red indicates broken joints, orange stands for partially broken links and red indicates broken joints:
image: 3 screenshots from simulation
Play with the "Max force" value to get different breaking behaviours.
...
Since the scene does not contain any fluid it is possible to change "MAX substeps" to 1 in the "Simulation Options".
Image: how to find sim opts, general tab
Furthermore, a "Quality" level of 30 for the "Caronte" solver is enough.
You find these settings here:
Image: caronte tab
