Fix up hover script and improve bootloading.

scratch/misc.ks

@@ -1,15 +1,9 @@
-// Check for various sensors and set appropriate global constants.
-// Currently only checks for grav sensor, as that's the only one used by this library.
-// global HAS_GRAV_SENSOR is false.
-// function SensorCheck {
-//   local SensorList is 0.
-//   list SENSORS in SensorList.
-//   for s in SensorList {
-//     if s:type = "grav" {
-//       print "Gravometric sensor detected".
-//       set HAS_GRAV_SENSOR to true.
-//       return.
-//     }
-//   }
-//   set HAS_GRAV_SENSOR to false.
-// }
+// This alternative approach to hovering is ultimately not worth the complexity to use, but it's really neat! It maintains *whatever your current vertical velocity is* using the fact that F = μ*m/(r^2).
+// In practice, by the time the PID controller settles enough to make this worth
+// using, the efficiency gains have mostly dried up anyway.
+
+// lock STEERING to SHIP:UP.
+// wait until done or abs(SHIP:VERTICALSPEED - vertSpeed) < 0.05.
+// print "Maintaining velocity.".
+// lock targetForce to (SHIP:BODY:MU * SHIP:MASS) / ((SHIP:ALTITUDE + SHIP:BODY:RADIUS)^2).
+// lock THROTTLE to targetForce / SHIP:AVAILABLETHRUST.