feat(world3D): add a visible shape system to handle better visiblity

Actor2D also have a shape, in order to use them in other functions.

gamecore/modules/world/actors/actor2D.lua

@@ -193,6 +193,10 @@ end
 -- DRAW FUNCTIONS
 -- Draw the actors.
 
+function Actor3D:getShape()
+  return (self.x), (self.y), self.w, (self.h)
+end
+
 function Actor2D:draw()
   self:drawStart()
   local x, y = math.floor(self.x), math.floor(self.y)

gamecore/modules/world/actors/actor3D.lua

@@ -34,11 +34,13 @@ local Hitbox  = require(cwd .. "utils.hitbox3D")
 function Actor3D:new(world, type, x, y, z, w, h, d, isSolid)
   Actor3D.super.new(self, world, type, x, y, z, w, h, d, isSolid)
   self:initHitboxes()
+  self.world:registerShape(self)
 end
 
 function Actor3D:destroy()
   self.world:removeActor(self)
   self.mainHitbox:destroy()
+  self.world:removeShape(self)
   self.isDestroyed = true
 end
 
@@ -86,6 +88,7 @@ function Actor3D:move(dx, dy, dz)
   if (self.isDestroyed == false) then
     self.x, self.y, self.z, cols, colNumber = self.mainHitbox:checkCollision(dx, dy, dz, self.filter)
     self.mainHitbox:updatePosition()
+    self.world:updateShape(self)
   end
   return self.x, self.y, self.z, cols, colNumber
 end
@@ -199,6 +202,10 @@ end
 -- DRAW FUNCTIONS
 -- Draw the actors.
 
+function Actor3D:getShape()
+  return (self.x), (self.y - self.z - self.d), self.w, (self.h + self.d)
+end
+
 function Actor3D:draw()
   self:drawStart()
   local x, y = math.floor(self.x), math.floor(self.y - self.z - self.d + (self.h/2))

gamecore/modules/world/world3D.lua

@@ -31,6 +31,8 @@ local Bump          = require(cwd .. "libs.bump")
 local Bump3D        = require(cwd .. "libs.bump-3dpd")
 local CameraSystem  = require(cwd .. "camera")
 
+local PADDING_VALUE = 10/100
+
 function World3D:new(scene, actorlist, mapfile)
   World3D.super.new(self, scene, actorlist, mapfile)
 end
@@ -42,6 +44,7 @@ function World3D:initActors()
   self.currentCreationID  = 0
   self.actors = {}
   self.bodies = Bump3D.newWorld(50)
+  self:initShapes()
 end
 
 function World3D:newActor(name, x, y, z)
@@ -57,15 +60,41 @@ function World3D:moveActor(actor, x, y, z, filter)
 end
 
 function World3D:getActorsInRect(x, y, w, h)
-  -- Just a placeholder before adding a better algorythm
-  World3D.super.getActorsInRect(x, y, w, h)
+  return self:getShapeInRect(x, y, w, h)
 end
 
-function World3D:getVisibleActors(id)
+function BaseWorld:getVisibleActors(id)
+  local actors = {}
+  if (id ~= nil) then
+    local camx, camy, camw, camh = self.cameras:getViewCoordinate(id)
+    local paddingw  = camw * PADDING_VALUE
+    local paddingh  = camh * PADDING_VALUE
+    local x = camx - paddingw
+    local y = camy - paddingh
+    local w = camw + paddingw * 2
+    local h = camh + paddingh * 2
 
-  return self.actors
+    actors = self:getActorsInRect(x, y, w, h)
+  else
+    actors = self:getActors()
+  end
+
+  table.sort(actors, function(a,b)
+    if (a.y == b.y) then
+      if (a.depth == b.depth) then
+        return a.creationID < b.creationID
+      else
+        return a.depth > b.depth
+      end
+    else
+      return a.y < b.y
+    end
+  end)
+
+  return actors
 end
 
+
 -- PLAYER FUNCTIONS
 -- Load player stuff
 
@@ -141,4 +170,33 @@ function World3D:getBodiesInRect(x, y, w, h)
   return {} --self.bodies:queryRect(x, y, w, h)
 end
 
+-- SHAPE SYSTEM
+-- Handle onscreen shapes
+
+function World3D:initShapes()
+  self.shapes = Bump.newWorld(50)
+end
+
+function World3D:registerShape(actor)
+  local x, y, w, h = actor:getShape()
+  return self.shapes:add(actor, x, y, w, h)
+end
+
+function World3D:updateShape(actor)
+  local x, y, w, h = actor:getShape()
+  return self.shapes:update(actor, x, y, w, h)
+end
+
+function World3D:removeShape(actor)
+  return self.shapes:remove(actor)
+end
+
+function World3D:checkShapeIntersection(actor, x, y)
+  return self.shapes:check(actor, x, y)
+end
+
+function World3D:getShapeInRect(x, y, w, h)
+  return self.shapes:queryRect(x, y, w, h)
+end
+
 return World3D