Metal Extraction Potential Factor shows how much ootential metal can be extracted.

e.g. 750 potential,
for 2m/s base extraction is 750*2 = 1500 possible metal to be extracted,
for 2m/s base + 50% overdrive is 750*2*1.5 = 2250m.

Count metal extracted for each metal spot.

To calculate MetalExhaustMult, multiple formula is supported. (because linear is buggy)

Linear: ( potential - extracted ) / potential.

Inverse proportional: potential / ( extracted + potential )

Square inverse proportional: 1 / ( 1 + (extracted * potential)^2 * 0.16 ) because its close to linear while not resulting 0.

Square inverse proportional is currently default.

MetalExhaustMult = max(MetalExhaustMult,0.01) to prevent weird situations.

Overdrive will adjust for best output, but need some seconds.

[Spoiler]

Reclaim metal is increased to 0.8 for wrecks and 0.5 for debris.

I need some math for OptimizeOverDrive but tomorrow.