A little project to learn about wheel colliders an AI in a Unity 3D Car. The goal is to resolve all the challenges.

(I created this project to train engineers at DeNA Vancouver.)

This project was tested with Unity 5.2.

• Download the project.
• The folder Challenges has the scenes for each Challenge.
• You need to proceed in order and reuse part of the code you will generate.
• All the resources for the challenge are provided in the folder content.
• Use the links for the next slide to get the information needed to complete the challenges!
• Good Luck :)

Wheelcollider:

• http://docs.unity3d.com/Manual/class-WheelCollider.html
• http://www.theappguruz.com/tutorial/unity-wheel-collider-motor-vehicle/

Rigid Body:

• http://docs.unity3d.com/Manual/class-Rigidbody.html

Raycasting:

• https://www.youtube.com/watch?v=P0PHY1hJp5k

Use Youtube… a lot of material is there :)

Goal : Create a basic car and move it using Wheel Colliders

• Open the scene Challenge1
• In the center of the scene you will find a basic 3D model of a car. The chassis and the wheels are independent objects.
• Using Wheel Colliders create a Monobehaviour to control the car movement using the arrow keys.

Hints:

• You will need a Rigid body for the chassis. Adjust the physical parameters like Mass or Center of Gravity to improve the stability of your car.
• The motorTorque could be calculated like : EngineTorque / GearRatio * Input.GetAxis("Vertical");
• If you want to simplify the equation, assume your car only have one GearRatio, and this is equal to 4.31f;

Goal : Explore properties of Wheel Colliders and Pimp Your Ride!

• Continue working in the scene Challenge1
• Make all the wheels rotate in the direction of the movement.
• Rotate the front wheels every time the user turns to left or right.
• Add Slips to your Wheels (check the prefab folder)

Optional:

• Pimp your Ride, change the chassis and add your custom one!
• Explore the Wheel Colliders Suspension Spring parameters… Create a Low Rider!

Goal : Make the car move alone

• Grab the car you created on the Challenge1 and create a prefab with that.
• Open the scene Challenge2, you will see and empty scene with a plane.
• Copy the car prefab in the scene.
• Create an empty GameObject called WayPoints
• For the prefab folder drag the WayPoint prefab inside the GameObject you created, generate several copies and create a circuit (you will see something similar to the left image, several cubes united by lines)
• Define one of the WayPoints as a starting point.
• Based on the original behaviour you used for your car, do the modifications to make the car navigate alone using the Waypoints.
• Change the place of the Waypoints to see how your car performs.

Goal : Make the car move alone and avoid obstacles

• Grab the car you created on the Challenge2 and create a prefab with that.
• Open the scene Challenge3, you will see and empty scene with a circuit of Waypoints and obstacles.
• Copy the car prefab in the scene.
• Based on the original behaviour you used for your car in the Challenge2, do the modifications to make the car navigate alone using the Waypoints and also avoid Obstacles

Hints:

• Use Ray cast to see what is in front of you.