STR - increases attack damage
CON - increases HP
DEX - decreases attack cooldown, increases hit chance
AGI - decreases movement cooldown, increases evasion chance

==================================

aoe n means a circle with radius n
line n means a line with length n
t cone n means an isosceles triangle with primary angle t and length from corner to opposite midpoint n
adjacent means the eight squares adjacent to your/target position
target within n means (centered on) any square within a radius of n
enemy/ally within n means (centered on) an enemy/ally within a radius of n
lvl in place of n means your level (no way)

crabner (crab summoner)
	buffs/debuffs aoes
	1: buff - target within lvl, summon a totem: allies within 5 gain str/2 str (can apply to self; only the largest bonus applies)
	2: debuff - target within lvl, summon a totem: enemies within 5 lose str/2 atk (only the largest penalty applies)
	passive: totems have 25% your health
	+STR/-CON

crabior (crab warrior)
	highest damage
	1: right claw - attack with right claw, damage adjacent
	2: left claw - attack with left claw, damage adjacent
	passive: if either attack hits while the other is on cooldown, 25% previous damage is added
	+STR/-DEX

crabper (crab sniper)
	longest range
	1: snipe - damage to enemy within 2*lvl
	2: gill-ish - stealth until movement
	passive: 25% additional damage while stealthed
	+STR/-AGI

crab, rn (crab, registered nurse)
	heals
	1: help - heal aoe 5 target within lvl
	2: fix - heal to (100+lvl)% and grant immunity to 2 hits, ally within lvl
	passive: 25% of any healing done is also applied to self
	+CON/-AGI

craban (crab shaman)
	control
	1: pull - yoink an ally or enemy within 2+sqrt(lvl) to adjacent to you
	2: push - optionally target an ally or enemy within 2+sqrt(lvl); line 2+sqrt(lvl), enemies hit are pushed to adjacent, targeted enemy is pushed to end of line
	passive: each enemy adjacent to the path of a pushed or pulled target has 25% chance to take damage
	+CON/-DEX

crab with a really thick shell (crab with a really thick shell)
	tank
	1: shield - nullify next hit
	2: taunt - enemy within lvl targets you next
	passive: you and allies within 5 take 25% less damage (does not stack)
	+CON/-STR

crabard (crab wizard)
	largest aoes
	1: zap - do a zap, damage line lvl adjacent
	2: boom - do a boom, damage aoe sqrt(lvl) target within lvl
	passive: allies have "only" a 25% chance to be hit by your attacks!!
	+DEX/-STR

crabinator (crab the terminator)
	fastest attacks
	1: brbrbrap - shoot assault rifle, damage 30deg cone sqrt(lvl)
	2: fwooosh - shoot flamethrower, damage 90deg cone sqrt(lvl)/2
	passive: 25% chance for abilities not to be put on cooldown when used
	+DEX/-CON

crabbot (crab robot)
	is a death cloud
	1: whirl - spinny blades all around, damage aoe 5
	2: shrapnel - sharp things in front, damage 150deg cone 5
	passive: enemies within sqrt(25% lvl) take damage upon your movement
	+DEX/-AGI

crab bond (crab james bond)
	is a spy
	1: infiltrate - turn invisible until you've moved sqrt(lvl) squares
	2: sabotage - damage to enemy within 10 (doesn't count against stealth)
	passive: 25% chance to count as an ally whenever targeted
	+AGI/-STR

crabwayman (crab highwayman)
	fastest
	1: *is fast* - teleport to target within 2+sqrt(lvl) and damage adjacent each square between
	2: *is tricksy* - reset movement and *is fast* cooldowns
	passive: if movement is off cooldown, take 25% damage and consume movement cooldown
	+AGI/-CON

crabpire (crab vampire)
	life drain
	1: nibble - damage enemy within 1, heal amount dealt
	2: bat - become a bat, damage adjacent, heal amount dealt, teleport to target within 10
	passive: enemies within 5 receive 25% less healing
	+AGI/-DEX

================================

instances are weekly pvp and pve
there is one instance per day
sometimes there are special instances, like daily hardcore or monthly
at the end of an instance, the top 2% in each class are made legendary in that class
legendaries have 50% or 12.5% in their passives instead of 25%, whichever is better
also legendaries count as separate classes, so the 2% cut only includes non-legends
as far as art, legendaries are the same sprites with inverted colors

also possible is matchmaking instances
uses a lobby and a skill rating system
matches are probably 4v4, maybe 5v5?
uses a special quadtree structure for a smaller world, perhaps a single tier 3?

movement is wasd, but those buttons actually control your move-to cursor
whenever your movement comes off cooldown, you move to the square closest to the move-to cursor
when you are subjected to a teleport, whether your own, allied, or enemy:
	- if your cursor is on your position, it is moved to your new position
	- otherwise, it remains in its location

consider the following scenario, given in chronological order:
players 2 and b are combatting each other
player 2 uses a forced movement ability that, on player 2's screen, targets player b
the server receives player 2's ability packet
player b uses a remote target ability that, on player b's screen, targets player 2
the server receives player b's ability packet
player b receives player 2's ability packet
player 2 receives player b's ability packet
is it fair for player 2 to be hit by player b's ability? i think not.
especially consider if player b had lagged for a long period of time and had been pushed multiple times away from player 2
on the other hand, nothing should favor environmental enemies
so if player 2 is instead environmental enemy 2, there is no question that it should hit
there are two solutions to this change in opinion:
1. ability packets always encode both absolute and relative positions
2. ability packets encode position dependent upon the game mode
option 1 is more bandwidth, but allows for things like the game mode changing mid-instance
option 2 is probably better in every realistic way
part of server info includes whether to transmit ability targets as relative, absolute, or both

================================

the world is quadtrees
       mxn        - tier 1 mxn of tier 2
        |
   ___16x16___    - tier 2 16x16 of tier 3, total 512x512 squares
  /     |     \
32x32 32x32 32x32 - tier 3, single quadtree node is 32x32 squares
this means that a tier 3 quadtree bitmask is 32x32/8 = 32x4 = 128 bytes
tier 2 is the size that the client knows; 512x512*2 bytes = 512 kibibytes
we'll use rmo because it's more interoperable with other things in c++ and go
size of a world depends upon the instance, but number of players can never exceed 65536
the world is an m*n*16*16*32*32 chunk of memory, or m*n*262144 squares
the tier 3s are contiguous memory
tier 2s have auxiliary matrices of pointers into the world
i.e. a change in quadtree index always corresponds to a change in tier 2 index

================================

obviously we need a crab class
what the class needs:
	name, class
	level, xp
	str, con, dex, agi
	max hp, current hp
	who is buffing, who is debuffing, who is giving tank passive, who is giving vamp passive
	last damage for warrior passive
	server only:
		kills, deaths, assists
		damage done, healing done
		who has assisted in killing this crab
	-
	action 1
	action 2
	on damage (check have tank passive, highwayman passive)
	on move (check for tank, vampire, and totems, robot passive)

===============================

network stuff
authentification is done in tcp using ssl like a not-dumb
the server generates a random 64-bit login token used to feed a cipher
during ssl, the server sends the number to the client
once logged in, we switch to udp
all datagrams are enciphered with whirling ekxe, then with the login token

then we need multiple udp packet types
client side:
common to everything:
	my current 64-bit login token
	sequence number
	packet type
move waypoint to position:
	new position, 2-int vector, absolute
use ability:
	ability number 0 or 1 (server knows client's class)
	cursor position, 2-int vector, relative to what the client thinks is its position
keyframe 1:
	what t3 i think i'm in
	what i think my in-t3 position is
	number of other crabs i know about
	list of relative positions of crabs i know
	list of their healths
keyframe 2:
	what t3 i think i'm in
	what i think my in-t3 position is
	number of buff totems i know about
	number of debuff totems i know about
	list of relative positions of buff totems i know about
	list of their healths
	list of relative positions of debuff totems i know about
	list of their healths
pong:
	sequence number of received ping
	time field of received ping
ack:
	bitset of the recieve status of the last 128 packets

server side:
common to everything:
	your current 64-bit login token
	sequence number
	packet type
update crabs:
	number of crabs
	list of:
		16-bit crab id (can be you)
		bitset of fields updated
		t3, in-t3 position, hp, xp, level (also includes stats)