From b92f441d4022f54150c86b952f84ec802db3674b Mon Sep 17 00:00:00 2001
From: Kazhnuz <kazhnuz@chlore.net>
Date: Sat, 27 Jul 2019 13:52:41 +0200
Subject: [PATCH] feat: add parallax backgrounds

---
 .../game/modules/world/init.lua               | 26 ++++++++++++++++++-
 .../game/modules/world/maps/test.lua          | 15 +++++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/sonic-radiance.love/game/modules/world/init.lua b/sonic-radiance.love/game/modules/world/init.lua
index c07057f..07622ae 100644
--- a/sonic-radiance.love/game/modules/world/init.lua
+++ b/sonic-radiance.love/game/modules/world/init.lua
@@ -16,7 +16,6 @@ function RadianceWorld:createMapController()
   end
 end
 
-
 function RadianceWorld:loadMapObjects()
   RadianceWorld.super.loadMapObjects(self)
   self:addInvisibleWalls()
@@ -31,4 +30,29 @@ function RadianceWorld:addInvisibleWalls()
   self.obj.collisions["invisible"](self, -16,   0,   0, 16,   h, 1000)
 end
 
+function RadianceWorld:draw(dt)
+  self:drawBackgroundColor()
+  local camNumber = self.cameras:getViewNumber()
+
+  if (camNumber == 0) then
+    self:drawMap()
+    self:drawActors()
+  else
+    for i=1, camNumber do
+      self:drawParallax(i)
+      self.cameras:attachView(i)
+      self:drawMap(i)
+      self:drawActors(i)
+      self.cameras:detachView(i)
+    end
+  end
+end
+
+function RadianceWorld:drawParallax(i)
+  local x, y, w, h = self.cameras:getViewCoordinate(i)
+  if (self.map ~= nil) and (self.maptype ~= "sti") then
+    self.map:drawParallax(x, y, w, h)
+  end
+end
+
 return RadianceWorld
diff --git a/sonic-radiance.love/game/modules/world/maps/test.lua b/sonic-radiance.love/game/modules/world/maps/test.lua
index 930418f..d497e45 100644
--- a/sonic-radiance.love/game/modules/world/maps/test.lua
+++ b/sonic-radiance.love/game/modules/world/maps/test.lua
@@ -4,6 +4,8 @@ local TestMap = BaseMap:extend()
 function TestMap:new(world)
   TestMap.super.new(self, world)
   self:setPadding(0, 96, 0, 0)
+
+  self.background = love.graphics.newImage("assets/backgrounds/parallax/test-back.png")
 end
 
 function TestMap:loadCollisions()
@@ -30,4 +32,17 @@ function TestMap:draw()
   -- Empty Placeholder function
 end
 
+function TestMap:drawParallax(x, y, w, h)
+  local imax, jmax = (w/32)+1, (h/32)+1
+  local x, y = x or 0, y or 0
+  local x = math.floor(x/4) % 32
+  local y = math.floor((y+96)/6) % 32
+
+  for i=0, math.ceil(imax) do
+    for j=0, math.ceil(jmax) do
+      love.graphics.draw(self.background, (i-1)*32-x, (j-1)*32-y)
+    end
+  end
+end
+
 return TestMap