Lua Documentation: Global Functions
Alpha ( color c, float percent ) [return color]
Returns a color with the specified Alpha.
approach ( float current, float goal, float speed ) [return float]
Use this to make a current value approach a goal value at the given speed. Speed must not be negative. The value will not overshoot the goal.
When you see the error "approach: speed 1 is negative." it means that the speed value passed was negative. The 1 is there because approach and multiapproach use the same internal function and can be ignored when using approach.
ArbitrarySpeedMods [return LuaOptionRow]
This is the lua based Speed Mod system currently found in
Themes/_fallback/03 customspeedmods.lua. Does not take any kind of parameters when inserted into a screen, as it grabs from preferences usually located in Advanced Options to set the margin of your selections when choosing a speed mod.