Introduction

Richard Burns Rally incorporates an unprecedented level of physics programming in pursuit of achieving the most accurate simulation of real life rallying to date. We have built a physics model that produces real-time vehicle dynamics to a quality unseen in existing rally titles. Our aim has been to create a gameplay experience that comes as close as possible to driving a real life 300 horse power A8 class rally car. We have approached this aim with three fundamental design goals in mind � a realistic handling system, realistic wear and a damage model that actually affects the handling of the car.

To achieve this we have identified the key components of a real life rally car, and modelled them as close to reality as possible. What follows is an explanation of each of these components and how they impact on the player�s experience.


Multi Body System

Existing rally games are largely based on a single body system. This presumes that each tyre doesn�t have its own individual mass; therefore a tyre will stick to the ground until enough force is generated to lift the entire car off the surface

Our model is based on a multi body system, where each wheel is given its own mass and therefore moves realistically over uneaven road surfaces. Each wheel works independently, reacting individually to the ground features it is driven across.

For the player, this means that the slightest change in road surface will be detectable in the car's handling, so the player will feel potholes, rocks and even road camber as they drive.