Camera moved to /not/ and cleaned-up a bit

1 files changed, 145 insertions, 0 deletions

diff --git a/not/Camera.lua b/not/Camera.lua
new file mode 100644
index 0000000..63489f3
--- /dev/null
+++ b/not/Camera.lua
@@ -0,0 +1,145 @@
+--- `Camera`
+-- Used in drawing.
+Camera = {
+	x = 0,
+	y = 0,
+	dest_x = 0,
+	dest_y = 0,
+	scale = getScale(),
+	scaler = getRealScale(),
+	shake = 0,
+	timer = 0,
+	delay = 0,
+	origin_x = 0,
+	origin_y = 0,
+	shake_x = 0,
+	shake_y = 0,
+	world = --[[not.World]]nil,
+}
+
+-- Constructor of `Camera`
+function Camera:new (world)
+	local o = {}
+	setmetatable(o, self)
+	self.__index = self
+	o.world = world
+	o:setPosition(o:follow())
+	o:setDestination(o:follow())
+	return o
+end
+
+-- Drawing offsets
+function Camera:getOffsets ()
+	return -self.x,-self.y
+end
+
+-- Position
+function Camera:setPosition (x, y)
+	local x = x or 0
+	local y = y or 0
+	self.x, self.y = x, y
+end
+
+function Camera:getPosition ()
+	return self.x, self.y
+end
+
+function Camera:getPositionScaled ()
+	return self.x*self.scale, self.y*self.scale
+end
+
+-- Destination
+function Camera:setDestination (x, y)
+	local x = x or 0
+	local y = y or 0
+	self.dest_x, self.dest_y = x, y
+end
+
+function Camera:getDestination ()
+	return self.dest_x, self.dest_y
+end
+
+-- Translate points
+function Camera:translatePosition (x, y)
+	local x = x or 0
+	local y = y or 0
+	return (x-self.x)*self.scale, (y-self.y)*self.scale
+end
+
+function Camera:translatePoints(...)
+	local a = {...}
+	local r = {}
+	local x,y = self:getOffsets()
+	for k,v in pairs(a) do
+		if k%2 == 1 then
+			table.insert(r, (v + x) * self.scale)
+		else
+			table.insert(r, (v + y) * self.scale)
+		end
+	end
+	return r
+end
+
+-- Shake it
+-- Really bad script, but for now it works
+function Camera:shake ()
+	if self.shake_x == 0 then
+		self.shake_x = math.random(-10, 10) * 2
+	elseif self.shake_x > 0 then
+		self.shake_x = math.random(-10, -1) * 2
+	elseif self.shake_x < 0 then
+		self.shake_x = math.random(10, 1) * 2
+	end
+	if self.shake_y == 0 then
+		self.shake_y = math.random(-10, 10) * 2
+	elseif self.shake_y > 0 then
+		self.shake_y = math.random(-10, -1) * 2
+	elseif self.shake_y < 0 then
+		self.shake_y = math.random(10, 1) * 2
+	end
+	local x = self.origin_x + self.shake_x
+	local y = self.origin_y + self.shake_y
+	self:setDestination(x, y)
+end
+
+function Camera:startShake ()
+	self.timer = 0.3
+	self.origin_x, self.origin_y = self:getPosition()
+end
+
+-- Move follow
+function Camera:follow ()
+	local map = self.world.map
+	local sum_x,sum_y,i = map.center_x, map.center_y, 1
+	for k,naut in pairs(self.world.Nauts) do
+		local naut_x,naut_y = naut:getPosition()
+		if math.abs(naut_x - map.center_x) < map.width/2 and
+		   math.abs(naut_y - map.center_y) < map.height/2 then
+			i = i + 1
+			sum_x = naut_x + sum_x
+			sum_y = naut_y + sum_y
+		end
+	end
+	local x = sum_x / i - love.graphics.getWidth()/self.scale/2
+	local y = sum_y / i - love.graphics.getHeight()/self.scale/2 + 4*self.scale -- hotfix
+	return x,y
+end
+
+-- Update
+function Camera:update (dt)
+	if self.timer > 0 then
+		self.timer = self.timer - dt
+		if self.delay <= 0 then
+			self:shake()
+			self.delay = 0.02
+		else
+			self.delay = self.delay - dt
+		end
+	else
+		self:setDestination(self:follow())
+	end
+	local dx, dy = self:getDestination()
+	dx = (dx - self.x) * 6 * dt
+	dy = (dy - self.y) * 6 * dt
+	self:setPosition(self.x + dx, self.y + dy)
+end