Combining L1 Force and L2 Structure with Constraint Feature

Combining the dummies from the L1 Force and the L2 Structure categories is simple. By using the Constraint Setting panel, the dummies can be built together. In this section, you will learn how to construct a catapult chariot by applying different dummies from these two categories.

1. Apply the 4 Wheels dummy from the Physics Toolbox > L2 Structure category.
   
2. Apply the Projectile dummy from the L1 Force category. Position it above the 4 Wheels.
   
   Please note that these two dummies are independent entities at this time.
3. Select the Projectile dummy and open the Constraint Settings panel (Shortcut: Shift + F10).
4. The projectile takes the world as its target. Click on the Pick Target button and then click on the 4 Wheels dummy.
   
5. The projectile is then mounted to the 4 wheel one. You may then play to simulate the result.

   Note:

   If you want to decrease the recovery time after the first main strike of the spring effect to make it more real like a catapult, then you need to maximize the Force value in the physics control panel and the Damping value of the catapult dummy via the Object Physics Settings panel (Shortcut: Shift + F9).