Mothback/data/scripts/camera.lua

Camera = {
	pos = {x = 0, y = 0},
	width = 0,
	height = 0
}

function Camera:ConfineToLevel()
	self.pos.x = math.max(0,math.min(self.pos.x,LevelData.Width-self.width/game.scale))
	self.pos.y = math.max(0,math.min(self.pos.y,LevelData.Height-self.height/game.scale))
end

function Camera:positionCenterAt(x,y)
	self.pos.x = x-self.width/game.scale/2
	self.pos.y = y-self.height/game.scale/2
	self:ConfineToLevel()
end

function Camera:positionAt(x,y)
	self.pos.x = math.floor((x/self.width)*self.width)
	self.pos.y = math.floor((y/self.height)*self.height)
end