example.md 1.5 KB
tags: physics title: Hinge joint physics brief: This example shows a simple setup with a dynamic body physics object and two dynamic wheel physics object joined together with a joint of type "hinge". The hinge joint can simulate an axle or a pin on which other object is rotating in respect to the base. The example shows how to create, destroy and change properties of the joints. author: Pawel Jarosz
scripts: hinge_joint.script
The setup consists of four game objects. The game.project physics GravityY property is set to -500 to match the scale of the setup.
body : The square stone block. Contains:
- A Sprite component with the stone block image.
- A Collision object component. The Type is set to
DYNAMIC. A box Shape matching the sprite image is added to the components. - A script that joines the wheel game objects to to the body and reacts to user input by changing the direction of the rotation of the hinge joints.
- A label with an instruction to the user.
frontwheel : The cirular metal wheel. Contains:
- A Sprite component with the metal circle image.
- A Collision object component. Also has Type set to
DYNAMIC, Friction set to 0.9 and Restitution to 0.1. A box Shape matching the sprite image is added to the components.
backwheel : The same as above.
walls : The outer walls. Contains:
- A Collision object component. The Type is set to
STATIC. 4 box Shapes are added to the component. These are placed just outside of the game view.