Commit a6dae893d66319739e8dfe962f67285221eb9b91 introduced per-version
charge cost for firing mining lasers, but applies this in addition to
the old fixed cost which it was meant to replace. Fix by removing the
application of the fixed cost.
The same commit did successfully change the check for a laser having
sufficient charge to fire, so that's based purely on the variable cost.
As a consequence, firing a laser that has just enough charge to cover the
variable cost could cause its charge to go negative. (For example, by
fully charging a Mk1 laser and then firing it until it empties, resulting
in a charge of -400.) It turned out that set_RE_wear handled that badly,
producing an over-100% wear value that would wrap to a *low* wear value,
leading to the laser's wear bar looking as if it's fully charged.
To protect against silly wear values, make set_RE_wear clamp the wear
value to avoid wrapping. Handle specially the case of a fully-discharged
tool, where there was desirable wrapping to zero.
Disable the flashlight by default.
Use itemstack:{get,set}_{metadata,name,wear,...} rather than {to,from}_table.
Improve the style of part of the code of mischelaneous tools
Theyre already tiered with Mk1-3 (at least drill is, more in the future).
Tools can be considered as designed for different tiers of circuits thx to their power needs.
For example Mk3 will require ages to load in LV batbox.
Batboxes load tools timining: LV standard (1000EU), MV 4x faster (4000EU), HV 16x faster (16000EU)
Also since 1EU is the same in any circuit it is possible to move energy from one to another with portable devices like crystals.
Other changes:
- moved charge/discharge functions to battery_boxes_commons.lua
- added UI style backgrounds for all the batboxes
