Grimrock

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		{
			class = "SwarmBrain",
			name = "brain",
			sight = 5,
			allAroundSight = true,
			onThink = function(self)
				if self.go.level == party.level and self.go.x == party.x and self.go.y == party.y and self.go.elevation == party.elevation then
					return self:performAction("basicAttack")
				else
					return self:wanderIfPartyNotDetected() or self:pursuit()
				end
			end,
		},

Code: Select all

		{
			class = "UggardianBrain",
			name = "brain",
			sight = 6,
			morale = 100,
			seeInvisible = true,
			allAroundSight = true, -- so that using sidesAttack makes sense
			-- Very simple behaviour modification, just use the new attacks when the party is in a good position to
			-- get hit by them.
			onThink = function(self)
				if self.seesParty and party.level == self.go.level and party.elevation == self.go.elevation
				and self.go.map:checkLineOfFire(self.go.x,self.go.y,party.x,party.y,self.go.elevation) then
					if (self.partyLeft or self.partyRight) and not (self.partyAhead or self.partyBehind) then
					-- cannot use self:turnAttack() to autodetect facing as it only succeeds if party is adjacent
						return math.random() < 0.5 and self:performAction("turnAttack",self.partyRight and 1 or -1) or self:performAction("sidesAttack") or self:performAction("turnAttack",self.partyRight and 1 or -1)
					-- When either frontal attack could conceivably hit the party, don't favor double attack
					-- Note that if double attack fails and ranged attack could hit, builtin brain will do
					-- ranged attack
					elseif self.partyStraightAhead and math.random() < 0.5 and self:performAction("rangedAttack") then
						return true
					-- Only use double attack when there's ample space for it and the party is not too close
					elseif self.partyAhead and self.partyDistY > 1 and math.abs(self.partyDistX) <= 1 then
						local xAxis = self.go.facing%2==0
						if xAxis then
							if self.go.map:checkLineOfFire(self.go.x+1,self.go.y,self.go.x+1,party.y,self.go.elevation)
							and self.go.map:checkLineOfFire(self.go.x-1,self.go.y,self.go.x-1,party.y,self.go.elevation) then
								return self:performAction("doubleAttack")
							end
						else
							if self.go.map:checkLineOfFire(self.go.x,self.go.y+1,party.x,self.go.y+1,self.go.elevation)
							and self.go.map:checkLineOfFire(self.go.x,self.go.y-1,party.x,self.go.y-1,self.go.elevation) then
								return self:performAction("doubleAttack")
							end
						end
					end
				end
				return false
			end,
		},

Code: Select all

		{ -- Note: we use performAction("rangedattack") instead of rangedAttack()
		-- because rangedAttack() only shoots if the party is in front of the monster
		-- and we want to fire regardless of the party's direction
		-- XXX: This could be cleaned up a lot, make some local functions?
		-- XXX: This sight radius is exceptionally long
			class = "RangedBrain",
			name = "brain",
			sight = 8,
			allAroundSight = true,
			morale = 100,
			seeInvisible = true,
			onThink = function(self)
				if self.seesParty then
					-- If X blast could hit party, do it, since it's our
					-- signature move
					if self.partyDiagonal and self:performAction("xBlast") then
						return true
					elseif self.partyAdjacent then
						local free = {}
						if not self.blockedFront then
							table.insert(free,0)
						end
						if not self.blockedLeft then
							table.insert(free,3)
						end
						if not self.blockedRight then
							table.insert(free,1)
						end
						if not self.blockedBack then
							table.insert(free,2)
						end
						-- Run away, because artillery is not good in melee.
						-- We don't use flee() here because it would turn, which
						-- is a waste of time on this monster.
						-- ...but attack occasionally.
						if (#free==0 or math.random() < 0.15) and self:performAction("rangedAttack") then
							return true
						elseif #free ~= 0 then
							local choice = free[math.random(#free)]
							if choice == 0 then
								return self:moveForward() or self:wander()
							elseif choice == 1 then
								return self:strafeRight() or self:wander()
							elseif choice == 2 then
								return self:moveBackward() or self:wander()
							else -- 3
								return self:strafeLeft() or self:wander()
							end
						else
							return self:wander() -- turn uselessly like a dork
						end
					elseif self.partyDistY == 0 or self.partyDistX == 0 then
						return self.go.map:checkLineOfFire(self.go.x,self.go.y,party.x,party.y,self.go.elevation) and self:performAction("rangedAttack") or self:wander()
					else
						-- Let the builtin AI approach sometimes, otherwise there are situations where the party can be completely safe by staying on one square
						if math.random() < 0.2 then
							return false
						end
						-- Try to line up for a ranged attack.
						local x
						if math.abs(self.partyDistY) == math.abs(self.partyDistX) then
							x = math.random() < 0.5
						else
							x = (math.abs(self.partyDistY) > math.abs(self.partyDistX))
						end
						if x then
							if self.partyDistX > 0 then
								if (not self.blockedRight) and self:strafeRight() then return true end
							else
								if (not self.blockedLeft) and self:strafeLeft() then return true end
							end
							if self.partyDistY > 0 then
								if (not self.blockedBack) and self:moveBackward() then return true end
							elseif self.partyDistY < 0 then
								if (not self.blockedFront) and self:moveForward() then return true end
							end
						else
							if self.partyDistY > 0 then
								if (not self.blockedBack) and self:moveBackward() then return true end
							else
								if (not self.blockedFront) and self:moveForward() then return true end
							end
							if self.partyDistX > 0 then
								if (not self.blockedRight) and self:strafeRight() then return true end
							else
								if (not self.blockedLeft) and self:strafeLeft() then return true end
							end
						end
					end
				end
				return self:wander()
			end,
		},