Notes on 3D Physics in GDevelop

Overview

• GDevelop now includes 3D physics capabilities.
• The physics engine used is Jolt, an open-source 3D physics engine.
• Jolt is already being utilized in various AAA games.

Adding 3D Physics Behavior

• Steps to add 3D physics to an object:
  • Create a 3D object (e.g., a box).
  • Add the 3D physics behavior to the object.
  • Choose the type of object:
    • Dynamic
    • Static
    • Kinematic
  • Select the shape of the object (options: Sphere, Box, Capsule, Cylinder).
    • Capsule and Cylinder are common for character models.
  • Adjust settings such as density and gravity scale.
  • Click Apply to finalize.

Example Setup

• The ground is given the static physics behavior.
• A camera box is used for scene control.
• Previewing the game shows boxes falling and interacting with physics.

Physics Interaction

• Behavior of 3D Objects:
  • Works with both 3D boxes and 3D models from the asset store.
  • Example: Adding a large sphere and adjusting its density can affect how it interacts with other objects.
  • Lowering the density can result in noticeable interaction (e.g., getting pushed off the map).

Game Mechanics

• Explore more game-related mechanics using:
  • Actions and conditions associated with the 3D physics behavior.
  • Other 3D behaviors to enhance gameplay experience.

Example Game Mechanics

• Example setup includes:
  • Third-person camera extension.
  • 3D platformer character extension.
  • Ability to push boxes and interact with the game environment.

Future Changes

• The 3D physics behavior is relatively new, and changes are expected in future updates.

Resources

• To explore more examples, create a new game in GDevelop and search for 3D under the create tab.
• Additional updated 3D examples are available, including the Physics Character 3D Behavior.
• For more learning resources, check out the associated playlist.