Incorrect Power and Torque Figures

MF42-DZH commented 3 months ago

As explained in the current version of the readme as of writing this issue, the power and torque figures displayed on the graph does not line up 1:1 with what GT4 displays.

How to Recreate

This patch can be used with PCSX2 to display extra decimal points for the power figure shown when viewing a car in the garage, and if you use this graphing tool on several cars, you may notice that the numbers for peak torque and peak power do not line up. (This is ignoring at what RPM they occur in, since they seem to be baked into the car display via some text values in SpecDB.)

Probable Causes

Incorrect constant used for Power = (Torque × RPM) ÷ constant. Currently the latest release version of the tool uses 714.25 (assuming we're turning kgf.m torque and RPM into PS power), but it feels like all cars use a different value.
Incorrect application of torquevol and other torquemodifier[12] modifiers for engine and upgrade stats from SpecDB.
- What RPM should the low RPM torque modifier apply on, and up to which RPM should it interpolate towards the high RPM torque modifier?
Rounding issues when calculating.
- The grapher at its current release uses unrounded BigDecimals to calculate torque and power. Perhaps this is different to how GT4 does it?

Notes

Contribution via providing possibilities for how power and torque are calculated (without explicitly modifying this grapher's code) is perfectly fine, and will be accepted.