Splat: utilities for LÖVE

splat.lua

--SPLAT: utilities for LÖVE

--CLASSES
Classes = {}

function Classes:extend()
	o = {}
	setmetatable(o, self)
	self.__index = self
	return o
end

Types = Classes:extend()

function Types:extend()
	o = {}
	setmetatable(o, self)
	self.__index = self
	o.exists = 1
	o.id = 0
	t = {}
	o.userData = {}
	o.table = t
	return o, t
end

--MAP HANDLING
function parseObjects()
    for k, object in pairs(map.objects) do
    	newMapObject(object.name, object.x, object.y, object.width, object.height, object.visible, object.properties)
    end
end

--CAMERA
camera = {}
camera.x = 0
camera.y = 0
camera.scaleX = 0.3
camera.scaleY = 0.3
camera.rotation = 0

function camera:set()
	love.graphics.push()
	love.graphics.rotate(-self.rotation)
	love.graphics.scale(1 / self.scaleX, 1 / self.scaleY)
	love.graphics.translate(-self.x, -self.y)
end

function camera:unset()
	love.graphics.pop()
end

function camera:move(dx, dy)
	self.x = self.x + (dx or 0)
	self.y = self.y + (dy or 0)
end

function camera:rotate(dr)
	self.rotation = self.rotation + dr
end

function camera:scale(sx, sy)
	sx = sx or 1
	self.scaleX = self.scaleX * sx
	self.scaleY = self.scaleY * (sy or sx)
end

function camera:setPosition(x, y)
	self.x = x or self.x
	self.y = y or self.y
end

function camera:setScale(sx, sy)
	self.scaleX = sx or self.scaleX
	self.scaleY = sy or self.scaleY
end

function camera:mouseX()
	return love.mouse.getX() * self.scaleX + self.x
end

function camera:mouseY()
	return love.mouse.getY() * self.scaleY + self.y
end

--OBJECTS UTILS
function drawEach(table)
	for i = 1, #table do
		if table[i] and table[i].exists then
			table[i]:draw()
		end
	end
end

function collapseTable(t)
	local o = {}
	for i = 1, #t do
		if t[i] and t[i].exists then
			o[#o + 1] = t[i]
		end
	end
  return o
end