Finding a unit

Three conditions are joined by a logical AND, and the range is taken from the block you look from

mediumYou need: Links and getlink, Properties of units

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target1allytarget2anytarget3anysortdistanceradarsortOrderoutput

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@counter0number

nearnullnull

flyingnullnull

minenullnull

There are three on the map: a dagger and a flare belong to the enemy, a poly is ours. Three radars find different ones — through filters.

The instruction’s fields

Field	What is in it
first, second, third	the filters: three conditions joined by a logical AND
fourth	what measures “best” — that is the next lesson
fifth	where we look from: the block being asked
sixth	the sort direction
seventh	where to put the one found

Eight filters

Filter	Who qualifies
any	anybody
enemy	a unit of another team
ally	a unit of your own team
flying	airborne
ground	on the ground
attacker	able to shoot
player	driven by a player
boss	a wave boss

The derelict team does not count as an enemy: rusty units on the map will not come up under enemy.

Three filters are an AND, not an OR: enemy flying any finds one that is hostile and airborne. To have fewer than three conditions, the spare ones are set to any.

Silent failure

A radar does not see buildings. Neither yours nor anyone else’s: it walks units only. To find a block, a processor has its links (getlink), and the map has the world instructions.

Where it looks from

The fifth field is a block, and the range is taken from it:

Block	How far it sees
a turret	as far as it shoots
a processor	as far as it links
every other block	not at all

So a radar is usually hung on the very turret that will be commanded afterwards: it sees exactly what it can reach.

Note

The course sandbox has neither players nor waves, so the player and boss filters always give emptiness here. In the game they work as usual.

Remember

• A radar looks for one unit: the best by the measure in the fourth field.
• Three filters are joined by a logical AND; the unneeded ones are set to any.
• The range is taken from the block that is looking.
• A radar does not find buildings at all.

Task

Change the first radar in the example from enemy any any to enemy ground any — near gets the dagger and the flare drops out: it flies.

Then give the third radar ally ground any: the answer becomes null. The poly is airborne, there are no other allies on the map, and that is not an error but an honest “nobody”.