Physical Materials

In UE4, the way you can customize how an object behaves while simulating physics is through Physical Materials. In order to get into this new type of asset, let's create our own:

1. Create a new folder inside the Content folder called Physics.
2. Right-click on the Content Browser while inside that folder and, under the Create Advanced Asset section, go to the Physics subsection and select Physical Material.
3. Name this new Physical Material PM_Dodgeball.
4. Open the asset and take a look at the available options.

Figure 6.13: Asset options

The main options we should note are as follows:

• Friction: This property goes from 0 to 1 and specifies how much friction will affect this object (0 means this object will slide as if it was on ice, while 1 means this object will stick like a piece of gum).
• Restitution (also known as Bounciness): This property goes from 0 to 1 and specifies how much velocity will be kept after colliding...