feat(world): add a drawHUD function to draw the current HUD

It is able to draw everything a player object want directly where it 
should go.

Fixes #3

CHANGELOG.md

@@ -23,6 +23,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **actor**: Add functions to add stuf before and after `update` and `draw()`
 
+- **world/camera:** Add support for Head-Up-Display
+
 ### Changed
 
 - **world:** automatize world integration in a scene

examples/gameplay/moveplayer/actors/player.lua

@@ -28,4 +28,8 @@ function Player:draw()
   Player.super.draw(self)
 end
 
+function Player:drawHUD(id)
+  love.graphics.print(id .. " test", 4, 4)
+end
+
 return Player

gamecore/modules/world/actors/baseactor.lua

@@ -176,6 +176,11 @@ function BaseActor:drawEnd()
 
 end
 
+function BaseActor:drawHUD(id, height, width)
+
+end
+
+
 -- SPRITES FUNCTIONS
 -- Handle the sprite of the actor
 

gamecore/modules/world/baseworld.lua

@@ -332,6 +332,7 @@ function BaseWorld:draw(dt)
       self:drawMap(i)
       self:drawActors(i)
       self.cameras:detachView(i)
+      self.cameras:drawHUD(i)
     end
   end
 end

gamecore/modules/world/camera.lua

@@ -305,6 +305,9 @@ function CameraSystem:followActor(id)
   end
 end
 
+-- DRAW FUNCTIONS
+-- Basic callback to draw stuff
+
 function CameraSystem:drawDebugViewBox(id)
   local viewx, viewy, vieww, viewh = self:getOnScreenViewCoordinate(id)
   utils.graphics.box(viewx, viewy, vieww, viewh)
@@ -314,6 +317,21 @@ function CameraSystem:drawDebugViewBox(id)
   love.graphics.line(xx, yy-3, xx, yy+3)
   local string = id .. " x:" .. viewx .. " y:" ..  viewy
   love.graphics.print(string, viewx + 4, viewy + 4)
+  print(viewy)
+end
+
+function CameraSystem:drawHUD(id)
+  local viewx, viewy, vieww, viewh = self:getOnScreenViewCoordinate(id)
+  local view = self:getView(id)
+  local string2 = id .. " (" .. viewx .. ":" .. (viewh-viewy) .. ") "
+
+
+  love.graphics.setScissor(viewx, viewh-viewy, vieww, viewh)
+  love.graphics.translate(viewx, viewh-viewy)
+  view.target:drawHUD(id, vieww, viewh)
+
+  love.graphics.translate(-viewx, -(viewh-viewy))
+  love.graphics.setScissor( )
 end
 
 return CameraSystem