This program was developed to ease data entry for VDrift a
great cross-platform, open source driving simulation made with drift racing in
- A mildly competent opengl card.
- The following libraries, provided on OS X, on Windows must be in the directory
of the program or the Windows system directory:
Source tested to compile under ubuntu/codeblocks/amd64, winxp/visualc6/x86, and
osx lion/xcode4/i386, x86-64
- Find a torque curve you want to trace.
- Name it "curve.jpg" and put it in the same directory as this program.
- Run the program.
- Drag the edges or corners of the image to resize it until it lines up with the
graph (pay attention to torque, not horsepower). You will probably have to
re-adjust each side several times because as the image stretches things you had
lined up before will get a little out of line. You can adjust the vertical scale
if you want with '=' and '-'. * Press 'm' to change into draw mode.
- If your graph is in ft-lbs press 'u' once to change the units from metric to
imperial (it's important to do this before you start drawing).
- Start tracing the curve by clicking the mouse. The first point you place won't
be visible until you place a second.
- If you mess up right click to remove the point which is nearest to your
- After you're done, press 'w' to write the curve in a VDrift acceptable format
- Press escape to quit.
There are a few video options you can set in "configuration.ini" located in the
same directory as this program:
- display_x = x resolution
- display_y = y resolution
- display_bpp = color depth
- fullscreen = 0 is off, anything else is on
- hardware_cursor = 0 uses system cursor, anything else uses "mouse.png"
(located in Torque Tracer.app/Contents/Resources on OS X)
If you experience cursor lag (from a slower graphics card) try changing the
hardware cursor to 0. For the most accurate tracing you should set the
resolution to your monitors maximum native resolution, and turn on fullscreen,
however even with a low resolution you should get pretty good results.
(complete but may need testing) When you see a car's quoted torque and
horsepower from the manufacturer it says something like this:
220 bhp @ 5500 rpm
180 ft-lb @ 3000 rpm
- Press 'm' a second time to enter the text mode which will allow you to define
points like these.
- Type the number for torque or horsepower.
- Then type a letter that corresponds to the unit:
- n = Newton meter (Nm)
- f = foot-pounds (ft-lbs)
- k = kiloWatt (kW)
- h or b = brake horsepower (bhp)
- Then type in the rpm at which this peak occurs.
- Finally press enter. Your point should be placed (with the appropriate
conversions) where you specified.