Fixed Iron Spear spawns so that they arent always 100% chance.

-- New Large Grid Tanks

Iron Hammer - weak custom railgun turret
Iron Whirlwind - decent custom autocannon turret
Bronze Shield - truck with simple gatling turret
Iron Cat - remake of existing grid to use vanilla artillery turret on armored car

The Iron Spear (Advanced Rocket Truck) will now spawn 0-4 of the above vehicles to simulate a convoy of military / chaperone vehicles

-- New Small Grid Tank / Anti-Air

Bronze Javelin- weak custom autocannon turret - now can spawn with the Simple Rocket Truck

All spawns ignore combat phase

Metal Clan Truck and Rocket Convoys now spawn alone, and then spawn the remaining convoy vehicles over the next 20 seconds. There is a random chance for each spawn, there are four spawns possible, with a chance of spawning 0-4 convoy vehicles total.

This seems to work better with ground collision than spawning all the vehicles together at once. Some tanks do fall through the voxels but it happens much less, and there are more metrics to tweak to get it right this way.

-- New Advanced Encounter: Missile Forge --

* bigger base that has behavior very similar to Rocket Fabrication Plant, only using Missiles. Missiles target the highest value target, while Rockets target the closet target.

* minor tweaks and fixes for grid names

-- New Simple Vehicles --

- New heavily armored Tank with fragile PM Assault Cannon Turret

- New sensitive Flak vehicle with fragile yet super deadly PM 12x Gatling Turret

Try not to damage them too badly, and receive some nice loot!

-- New Advanced Rocket Station --

The "Rocket Fabrication Plant" has behavior much like the new Advanced Rocket Truck, except its a meaty base.

It has plenty o' lewt inside, but some of it is packed in with some highly explosive machinery.

Expect volleys of 3 rockets every 5-7 minutes or so, and a volley of 5 rockets when damaged every 5 minutes.

Current range is 5km, which means it can easily spawn within striking range of a player's activity or base. Given this is an "Advanced" encounter, a future mechanism will be added to activate the "Advanced" encounters, and a player would have considerable defenses at this point in the game.

First Round of Advanced Encounters (WIP)

3 new large vehicles

two of them are essentially placeholders with a turret on wheels

one is a new rocket truck that will attack anything within 5km with multiple rockets at once, but with virtually no defense of its own

Initial Release - Simple Encounters Finished

* some bases with a single turret
* an anti-aircraft base that spawns AA-rockets
* a missile silo that spawns both AA-rockets and missiles
* a big base with lots of turrets and missile silo behavior
* a truck convoy with phat loot
* an anti-aircraft convoy with AA-rockets

Rockets are smaller, do significant damage, dont destroy voxels, and attack the closest target.

Missiles are larger, do a lot more damage, destroy voxels (big craters), and attack the most valuable target in range (probably your base!).