# Vehicular Drift Simulator – My 1998 Senior Project

### DOWNLOAD THIS PROGRAM

###### in its original 1998 form! Includes technical essay.

###### Be sure to:

###### 0. refer to the README file.

###### 1. set** Wheelbase Length** to **2.718**.

###### 2. hover over each input box for pop-up explanations.

###### 3. If simulation is too fast, go to **Graph** tab and **check** the box **Real Time** (even though it says “Not Recommended” – for 1998-era computers).

#### The Story

The year is 1997 December (ok there’s a month in there too), and I was graduating with a Bachelor’s Degree in Mathematics at CalPoly.

I had been interested in car stuff for about 5 years. (Prior to that, I never drove and was disinterested in cars.) I had a keen in interest in **the behavior of a car sliding sideways from the locking of rear wheels (i.e. handbrake applied)**. Hence, I thought, why not do my senior project on that subject.

The project started out innocently enough to find the mathematical formulas that would describe the motion and path of such a vehicle *in general*. It very quickly became obvious there was no general solution (at least not in sight…) and that a numerical approximation approach is much more practical. It now seemed the next natural step is to perform & present the numerical approximation in a graphical program.

I’ve always had a natural ability to write programs, starting with my Casio graphing calculator to plot the loci of a point on a circle that is rolling on either a straight line or another circle. I had also just taken two courses in C++ (which I have now long forgotten). After a brief research, Visual Basic seemed a good choice for my purposes.

It was not uncommon at the time for a graduating senior to submit and complete his/her senior project *after* graduation, and so it was the case for me. I graduated with no experience and knowledge in Visual Basic. And I found a job. So I bought a book on VB and started reading up on it in BART, during my daily commute, 15 minutes at a time. Once I have churned through most of the book, I felt confident enough to embark on actually building the application.

I think it took me 2 weeks of daily coding (while holding my day job) to finish this program to its beta form. After some testing by friends and family, and a few more tweaks, the program was complete, and submitted to and accepted by CalPoly.