Today's stupid question. What makes things blow up?

[Cavemaniac]

I've been playing CW2 since it was first released, but only last night did this thought occur to me.

When do things blow up?

Y'know how when creeper touches an unfinished unit or an unarmoured building, it immediately blows up?

Well, what constitutes a 'touch'?

Is it the presence of creeper anywhere within the cell the unit occupies?

Is it the presence of creeper in any subcell that the unit occupies?

Is it pixel perfect 'collision detection'?

Reason I'm asking is that all units are shaped differently.

Beacons are triangular, so there's plenty of space around them. You could hang one from the ceiling and hopefully a minor incursion would leave it untouched, but if it was built on the floor, you'd get what you asked for.

Micro rifts are round so you'd think that creeper could get into one of the corners of the cell one occupies without actually touching the structure...

Any-hoo...

Just wondering.

[mpete]

did some tests
the presence of creeper anywhere within the cell the unit occupies

[Grauniad]

All units occupy a square comprised of 9 cells - regardless of the actual appearance of the unit. Detecting creeper in any cell in the square that the unit occupies constitutes cause for unit decay and eventual destruction.

[J]

Shields (and terrain) decay when there's creeper in any of the 12 surrounding subcells (decays faster when there are more subcells with creeper around it), even when the creeper doesn't try to move into the shield. When there's creeper inside the shield it is immediately destroyed (caused by phantoms). Terrain will decay normally when there's creeper inside of it.

[Cavemaniac]

Gotcha.

Pretty well what I thought.

J's response re: the creeper inside a cell causing immediate destruction was of particular interest - this can happen due to phantoms and teleporting creeper I guess.

[mpete]

note
creeper can not teleport into shields

[Cavemaniac]

note
creeper can not teleport into shields

Hmmm.

I've tried building shields where creeper teleports to.

Despite being finished, they always blow up when the creeper teleports in.

Or is there some other reason (like I'm doing it wrong/I have a faulty memory)?

[mthw2vc]

Fields cannot carry creeper into activated shields, but phantoms can.

[Ebon Heart]

what makes things blow up? Explosives for one... lol. And mth is right, a phantom lands in a shield, instant KO. That can suck if the shield is important.