modules/world: add camera system to the world system

gamecore/modules/world/baseworld.lua

@@ -27,6 +27,7 @@ local cwd   = (...):gsub('%.baseworld$', '') .. "."
 local BaseWorld = Object:extend()
 
 local Sti           = require(cwd .. "libs.sti")
+local CameraSystem  = require(cwd .. "camera")
 
 -- INIT FUNCTIONS
 -- All functions to init the world and the map
@@ -34,6 +35,8 @@ local Sti   = require(cwd .. "libs.sti")
 function BaseWorld:new(scene, actorlist, mapfile)
   self.scene = scene
 
+  self.cameras = CameraSystem(self)
+
   self:initPlayers()
   self:setActorList(actorlist)
   self:setMap(mapfile)
@@ -192,20 +195,42 @@ end
 
 function BaseWorld:draw(dt)
   self:drawBackgroundColor()
+  local camNumber = self.cameras:getViewNumber()
+
+  if (camNumber == 0) then
     self:drawMap()
     self:drawActors()
+  else
+    for i=1, camNumber do
+      self:drawMap(i)
+      self:drawActors(i)
+    end
+  end
 end
 
-function BaseWorld:drawActors()
+function BaseWorld:drawActors(id)
+  self.cameras:attachView(id)
   local actors = self:getActors()
   for i,v in ipairs(actors) do
     v:draw()
   end
+  self.cameras:detachView(id)
+end
+
+function BaseWorld:drawMap(id)
+  local tx, ty, scale = 0, 0, 1
+  if id ~= nil then
+    -- Du à la manière dont fonctionne STI, on est obligé de récupérer les info
+    -- de position de camera pour afficher la carte par rapport à ces infos
+    tx, ty  = self.cameras:getViewCoordinate(id)
+    scale   = self.cameras:getViewScale(id) or 1
+
+  	tx = math.floor(tx)
+  	ty = math.floor(ty)
   end
 
-function BaseWorld:drawMap()
   if self.haveMap then
-    self.map:draw()
+    self.map:draw(-tx, -ty, scale, scale)
   end
 end
 

gamecore/modules/world/world2D.lua

@@ -28,10 +28,13 @@ local World2D   = BaseWorld:extend()
 
 local Sti   = require(cwd .. "libs.sti")
 local Bump  = require(cwd .. "libs.bump")
+local CameraSystem  = require(cwd .. "camera")
 
 function World2D:new(scene, actorlist, mapfile)
   self.scene = scene
 
+  self.cameras = CameraSystem(self)
+
   self:initPlayers()
   self:setActorList(actorlist)
   self:setMap(mapfile)