* any amount of shielding prevents all HP damage
* when shields are sent to 0, orange blip
* all blips are 3 frames
considering a "shimmy" animation for start of shield recovery. maybe later
Instead of doing a special case for 1HP, 0HP is survivable, ships die
at negative HP instead. all ship health is adjusted to match, assuming
the weakest shot is 0.5hp, which is currently true. the "real" game will
totally rebalance all ships and weapons anyway.
we're getting close to when I have to stop dawdling and implement the
real game, the engine is _there._
it was showing the bar intended as the warning that there's no HP
under the shield. but I tried it and that bar just makes it look like
there *is* a sliver of health, which there isn't. so it's better off
without that in either mode.
some guns do less than one damage per shot (vulcan gun does 0.5), so
Instant Death Mode needs to max at 0x0.0001, the smallest nonzero value
in Pico-8's fixed-point numeric type.
One Hit Mode is just a comment for now, but I've been uncommenting it
to test it. Note that replacing the health meter with a "!" is triggered
by max HP + max shield <= 1 because 1 hp shows an empty bar.
this needs some more special cases for low-HP ships with active shields.
10s generator is too slow -- 10 seconds ago is an eternity in a shmup
and a player who has stopped firing should recover much faster. The
generator's max capacity is much lower and shield cost has been
rebalanced to match.
The Protron is much more expensive to fire, it was previously just
easy mode.
Shields now recover faster _once they start recovering_ (every second
if energy is available) but getting hit causes a "penalty cooldown"
that is much longer than the standard recovery interval. This behavior
is taken from Halo and basically every modern FPS that came after it;
it's unlike Tyrian, which had consistent shield recovery behavior.
But I think Halo's rule plays much better.
