Notes on 3D Physics in GDevelop

Introduction to 3D Physics in GDevelop

• GDevelop now incorporates a built-in 3D physics engine called Jolt.
• Jolt is an open-source 3D physics engine used in various AAA games.

Adding 3D Physics Behavior

• To add 3D physics to an object:
  • Select the object (e.g., a 3D box).
  • Add the 3D Physics behavior.
  • Choose the object type:
    • Dynamic
    • Static
    • Kinematic
  • Select the shape of the object:
    • Sphere
    • Box
    • Capsule
    • Cylinder
  • Tweak settings such as density and gravity scale.
• Press apply to turn the object into a 3D physics object.

Previewing Physics in Action

• Ground has been set to static, allowing for dynamic interactions with other objects.
• Objects can be previewed in the game to observe physics behavior (e.g., boxes falling and bouncing off each other).

Using 3D Models

• You can import 3D models from the asset store.
• Assign a behavior:
  • Set it as Dynamic.
  • Change its shape according to the model (e.g., sphere for a ball).
• Adjusting the density can significantly impact how objects interact (e.g., making a large ball easily knocked off by smaller boxes).

Game Mechanics Integration

• The 3D physics behavior can be combined with game mechanics:
  • Use actions and conditions for more nuanced gameplay.
  • Example: Using a third-person camera and 3D platformer character extension to interact with 3D physics.
• Players can push objects (e.g., boxes) off the level.

Future Developments

• The 3D physics behavior is new and may undergo changes. Stay updated with the engine’s improvements.

Additional Resources

• To explore more examples and functionalities, check the create tab in GDevelop.
• Search for 3D to find game examples with updated 3D physics behavior.
• For further learning, consult the provided video playlist.