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--- `Camera`
-- Used in drawing.
Camera = {
x = 0,
y = 0,
dest_x = 0,
dest_y = 0,
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*getScale(), self.y*getScale()
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)*getScale(), (y-self.y)*getScale()
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) * getScale())
else
table.insert(r, (v + y) * getScale())
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:getNautsAll()) 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()/getScale()/2
local y = sum_y / i - love.graphics.getHeight()/getScale()/2 + 4*getScale() -- 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
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