Merge branch 'new-cameras' of game-projects/gamecore into master

CHANGELOG.md

@@ -23,6 +23,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **world:** Add a way to automatically load hitbox from a file
 
+- **utils:** Add basic table functions
+
+- **camera:** Add two new camera types: "middle" and "zoom".
+
 ### Changed
 
 - **world2D:** Use a list for bodies (hitboxes, etc) and one other for actors
@@ -35,6 +39,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **world:** Make object creation more customizable by worlds
 
+- **camera:** Make mode configuration configurable
+
 ### Fixed
 
 - **world:** Remove a forgotten camera debug function

gamecore/modules/world/baseworld.lua

@@ -225,17 +225,14 @@ function BaseWorld:setPlayerNumber(playerNumber)
   self.playerNumber = playerNumber or 1
 end
 
-function BaseWorld:addPlayer(actor, sourceid, haveCam)
+function BaseWorld:addPlayer(actor, sourceid)
   local player = {}
   player.actor    = actor
   player.sourceid = sourceid or 1
 
   table.insert(self.players, player)
 
-  if (haveCam) then
-    local xx, yy = player.actor:getViewCenter()
-    self.cameras:addView(xx, yy, player.actor)
-  end
+  self.cameras:addTarget(player.actor)
 end
 
 function BaseWorld:sendInputToPlayers(actor)
@@ -319,7 +316,7 @@ function BaseWorld:newCollisionFromMap(objectlayer, object)
 end
 
 function BaseWorld:addPlayerFromMap(object, i)
-  self:addPlayer(self.obj.Player(self, object.x, object.y), i, true)
+  self:addPlayer(self.obj.Player(self, object.x, object.y), i)
 end
 
 function BaseWorld:loadMapPlayers()
@@ -361,6 +358,13 @@ function BaseWorld:getBackgroundColor()
   return self.backcolor[1]/256, self.backcolor[2]/256, self.backcolor[3]/256
 end
 
+function BaseWorld:resizeMap(w, h)
+  if self.haveMap then
+    local w, h = utils.math.floorCoord(w, h)
+    self.map:resize(w, h)
+  end
+end
+
 -- Lock MANAGEMENT FUNCTIONS
 -- Basic function to handle the lock
 
@@ -412,8 +416,8 @@ function BaseWorld:draw(dt)
     self:drawActors()
   else
     for i=1, camNumber do
-      self.cameras:attachView(i)
       self:drawMap(i)
+      self.cameras:attachView(i)
       self:drawActors(i)
       self.cameras:detachView(i)
       self.cameras:drawHUD(i)
@@ -448,10 +452,12 @@ function BaseWorld:drawMap(id)
     -- 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:getInternalCamCoordinate(id)
-    scale   = self.cameras:getViewScale(id) or 1
+    scale   = self.cameras:getViewScale(id) or 2
     local vx, vy  = self.cameras:getOnScreenViewRelativePosition(id)
   	tx = math.floor(tx - math.abs(vx))
   	ty = math.floor(ty - math.abs(vy))
+
+    local w, h = core.screen:getDimensions()
   end
 
   if self.haveMap then

gamecore/modules/world/camera.lua

@@ -37,11 +37,19 @@ function CameraSystem:new(world)
   self.scene = world.scene
   self.world = world
 
+  self.mode           = "split"
   self.verticalSplit  = SPLITSCREEN_ISVERTICAL
+  self.targets = {}
 
   self:initViews()
 end
 
+function CameraSystem:setMode(mode)
+  self.mode = mode
+  print("Camera system mode set to " .. mode)
+  return mode
+end
+
 function CameraSystem:initViews()
   self.views = {}
 
@@ -143,6 +151,18 @@ end
 -- WRAPPER and UTILS
 -- Access data from the views
 
+function CameraSystem:addTarget(target)
+  if (#self.views < SCREEN_LIMIT) then
+    if (#self.views.list == 0) or (self.mode == "split") then
+      local x, y = target:getViewCenter()
+      self:addView(x, y, target)
+      table.insert(self.targets, target)
+    elseif (self.mode == "middle") or (self.mode == "zoom") then
+      table.insert(self.targets, target)
+    end
+  end
+end
+
 function CameraSystem:addView(x, y, target)
   if (#self.views.list < SCREEN_LIMIT) then
     local id = #self.views.list + 1
@@ -203,13 +223,14 @@ end
 
 function CameraSystem:getViewCoordinate(id)
   local view  = self:getView(id)
+  local cam   = self:getViewCam(id)
 
   local viewx, viewy, vieww, viewh
-  viewx = view.pos.x - (self.views.width/2)
-  viewy = view.pos.y - (self.views.height/2)
+  viewx = view.pos.x - ((self.views.width/2) / cam.scale)
+  viewy = view.pos.y  - ((self.views.height/2) / cam.scale)
 
-  vieww = self.views.width
-  viewh = self.views.height
+  vieww = self.views.width / cam.scale
+  viewh = self.views.height / cam.scale
   return viewx, viewy, vieww, viewh
 end
 
@@ -218,10 +239,12 @@ function CameraSystem:getInternalCamCoordinate(id)
   local cam   = self:getViewCam(id)
 
   local viewx, viewy, vieww, viewh
-  viewx = cam.x - (self.views.width/2)
-  viewy = cam.y - (self.views.height/2)
+  viewx = cam.x - ((self.views.width/2) / cam.scale)
+  viewy = cam.y - ((self.views.height/2) / cam.scale)
 
   vieww, viewh = core.screen:getDimensions()
+  vieww = vieww / cam.scale
+  viewh = viewh / cam.scale
   return viewx, viewy, vieww, viewh
 end
 
@@ -287,9 +310,13 @@ end
 
 function CameraSystem:update(dt)
   for i,v in ipairs(self.views.list) do
+    if (self.mode == "middle") or (self.mode == "zoom") then
+      self:followAllActors(i)
+    else
       self:followActor(i)
     end
   end
+end
 
 function CameraSystem:moveView(id, x, y)
   self.views.list[id].pos.x = x
@@ -321,6 +348,53 @@ function CameraSystem:followActor(id)
   end
 end
 
+function CameraSystem:followAllActors(id)
+  local view = self:getView(id)
+  local PADDING = 16
+  -- TODO: make all the padding and stuff part of object definition instead ?
+  -- It would especially allow better work in future fake3D worlds
+
+  if (#self.targets > 0) then
+    local minX, minY, maxX, maxY
+    for i, target in ipairs(self.targets) do
+      local xx, yy = target:getViewCenter()
+      -- If start by initializing the value at the first found value
+      if (minX == nil) then minX = xx - (target.w/2) end
+      if (maxX == nil) then maxX = xx + (target.w/2) end
+      if (minY == nil) then minY = yy - (target.h/2) end
+      if (maxY == nil) then maxY = yy + (target.h/2) end
+
+
+      minX = math.min(minX, xx - (target.w/2))
+      maxX = math.max(maxX, xx + (target.w/2))
+      minY = math.min(minY, yy - (target.h/2))
+      maxY = math.max(maxY, yy + (target.h/2))
+    end
+
+    -- Add padding
+    minX = minX - PADDING
+    minY = minY - PADDING
+    maxX = maxX + PADDING
+    maxY = maxY + PADDING
+    local x, y
+    x = (minX + maxX) / 2
+    y = (minY + maxY) / 2
+
+    local scale = 1
+    if (self.mode == "zoom") then
+      local ww, hh = core.screen:getDimensions()
+      local scalex = (maxX-minX)/ww
+      local scaley = (maxY-minY)/hh
+      scale = math.max(scale, scalex, scaley)
+      view.cam.scale = 1/scale
+      self.world:resizeMap(ww * 3, hh * 3)
+    end
+
+    self:moveView(id, x, y)
+  end
+end
+
+
 -- DRAW FUNCTIONS
 -- Basic callback to draw stuff
 

gamecore/modules/world/world2D.lua

@@ -82,10 +82,7 @@ function World2D:addPlayer(actor, sourceid, haveCam)
 
   table.insert(self.players, player)
 
-  if (haveCam) then
-    local xx, yy = player.actor:getViewCenter()
-    self.cameras:addView(xx, yy, player.actor)
-  end
+  self.cameras:addTarget(player.actor)
 end
 
 -- MAP LOADING FUNCTIONS
@@ -119,7 +116,7 @@ function World2D:newCollisionFromMap(objectlayer, object)
 end
 
 function World2D:addPlayerFromMap(object, i)
-  self:addPlayer(self.obj.Player(self, object.x, object.y), i, true)
+  self:addPlayer(self.obj.Player(self, object.x, object.y), i)
 end
 
 -- BODIES MANAGEMENT FUNCTIONS

gamecore/utils/init.lua

@@ -27,5 +27,6 @@ local cwd  = (...):gsub('%.init$', '') .. "."
 return {
   math        = require(cwd .. "math"),
   graphics    = require(cwd .. "graphics"),
-  filesystem  = require(cwd .. "filesystem")
+  filesystem  = require(cwd .. "filesystem"),
+  table       = require(cwd .. "table")
 }

gamecore/utils/table.lua

@@ -0,0 +1,52 @@
+-- loveutils.table : simple functions for table manipulation and computation.
+-- TODO: could be a part of loveutils.math ?
+
+--[[
+  Copyright © 2019 Kazhnuz
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy of
+  this software and associated documentation files (the "Software"), to deal in
+  the Software without restriction, including without limitation the rights to
+  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+  the Software, and to permit persons to whom the Software is furnished to do so,
+  subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+]]
+
+local Table = {}
+
+function Table.reduce(list, fn)
+  local acc
+  for k, v in ipairs(list) do
+      if 1 == k then
+          acc = v
+      else
+          acc = fn(acc, v)
+      end
+  end
+  return acc
+end
+
+function Table.sum(table)
+  local sum = 0
+  for _, v in pairs(table) do
+    sum = sum + v
+  end
+
+  return sum
+end
+
+function Table.average(table)
+  return Table.sum(table) / #table
+end
+
+return Table