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This setup shows you how to destroy a fractured wall with a wrecking ball. A sphere falls down and crashes into the wall, and destroys it. A MultiJoint constraints the sphere to the mounting and acts like a rope.

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The scene setup with the wrecking ball, a prefractured wall, and MultiJoints.

Here is the nodes list:

• 2 “Sphere” objects (wrecking ball, steering geometry)
• 3 “Cube” objects (wall, mounting, ground)
• 1 “Null” object (locator)
• 1 “Gravity” daemon
• 2 “MultiJoint” nodes

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All scene elements can be added from RealFlow's “Edit” menu:

• Add > Objects | Daemons

• RealFlow nodes can be moved, scaled, and rotated with the the W, R, and and E keys keys.

• Imported objects from SD files have to be unlocked before they can be transformed with with Selected object > Node Params > Node > SD ↔ Curve

• Viewport perspective is changed with the the 1, 2, 3, and and 4 keys keys.

• Shading modes are toggled with the the 7, 8, 9, and and 0 keys keys.

The Setup

• Add a cube object and rescale/position it to your needs. This node (“Cube01”) will serve as the wall.

• Create another cube (“Cube02”, the mounting) and place it somewhere above the wall.

• The third cube (“Cube03”) is the ground node

• A sphere is used as the wrecking ball (“Sphere01”) and positioned next to the mounting.

• A null (“Null01”) )is placed directly below the mounting.

• “Gravity” introduces a force.

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Now, add a MultiJoint and open its “Creation” panel under “Node Params”:

• Objects A > Cube02Sphere01

• Objects B > Sphere01Cube02

• Creation mode > At Locators Positions

• Locators > Null01

• Create/Recreate

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• Select the wall node (“Cube02”).

• Open the “Voronoi by Steering Geometry” tool from the “Tool Bar”.

• Enter the values as shown below and click on “OK”.

• Delete the “Sphere02” and “Cube02” objects – they are not needed any longer.

• Change the new object's “Dynamics” mode to “Active rigid body”.

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Reconnect the Wall's Fragments

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• Add another MultiJoint node (“MultiJoint02”).

• Open the MultiJoint's “Creation” panel under “Node Params”.

• Objects A > Cube03, Cube01_fractured01, Cube03

• Objects B > > Cube03, Cube01_fractured01, Cube03

• Create/Recreate

• Forces > Force max mode > Constant limit

• @ Max force > 150000

• Collisions > Enable if break > Yes

• Break > Break if distance exceeded > Yes

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Simulate

Click on “Simulate” to see the results. Play with different “@ Max force” settings of the “MultiJoint02” node to get different degrees of destruction.

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