Fracture Crate

The basics of the crate is to take the wall we made in class, scale to a square, clone, put in position on all six sides [maybe omit the bottom], rotate so there is not obvious duplication ... then, add these new cloned elements to the RB collection and to Fracture.

Tips for fracture:

Try turning Connectivity on/off

Set Energy loss to a low number to increase brittle shatter effect

You might also get a nicer explosive effect if you decrease separation time and velocity cap from the defaults

Increase scale tolerance for more explosive effect

Experiment with collision tolerance

Drag action keeps the fallen fragments from jiggling around forever and never coming to rest

Decreasing friction will also help the crate to appear to burst apart more

Increasing Elasticity up to 1.0 can help the liveliness as object interact with each other ... increasing friction keeps the fragments from sliding on the floor too far

If you are using a crowbar to smash a crate, make it a mesh convex hull.

Making the crowbar a concave mesh will greatly increase the explosive effect. This is because the mesh is penetrating the box very quickly. It might be difficult to control the fragments from flying out of the frame too quickly.

Tip – under reactor utility/utilities, you can test to determine is a mesh is convex or not

Mass is in kilos. A kilogram = about 2.2 lbs.

Customize units to set up to feet/inches or metric. In the utility under World, we see I set up metric as the units in Max. The Z setting is a normal gravity, it is good to leave that alone. working in metric is a good idea, as there is a 1 to 1 correspondence here.

This is the default setting for feet:

A meter = about 3.3 feet.

Use the tape helper to evaluate size of any object to hit the crate.

The Mass property is weight in kilos.

1 Kilo = 2.2 pounds.

The head of this ax is over 12 pounds.

You could make a crowbar from a loft.

The sides of the crate could be done once or twice and rotated to the different sides and top to get as much variety with the least effort.

Try and follow the lines of the wood, unlike the example here!

A suggestion is, to temporarily group the fragments BEFORE you add to the RB collection and move them into precise position, THEN ungroup and add to Reactor.