Added Fader class.

src/fader.lua

@@ -0,0 +1,92 @@
+------------------------------------------------------------------------------
+-- Imports
+------------------------------------------------------------------------------
+
+local love = require 'love'
+local make_class = require 'src.classes'
+
+
+------------------------------------------------------------------------------
+-- Class definitions
+------------------------------------------------------------------------------
+
+local Fader = make_class()
+
+
+------------------------------------------------------------------------------
+-- Class methods
+------------------------------------------------------------------------------
+
+function Fader:_init()
+    self.t = 0.0
+    self.step = 0
+    self.done = true
+    self.reverse = false
+end
+
+
+function Fader:_reset()
+    self.t = 0
+    self.step = 0
+    self.done = false
+end
+
+
+function Fader:fade_in()
+    self:_reset()
+    self.reverse = true
+end
+
+
+function Fader:fade_out()
+    self:_reset()
+    self.reverse = false
+end
+
+
+function Fader:update(dt)
+    if not self.done then
+        self.t = self.t + dt
+
+        if self.t >= 0.009 then
+            self.step = self.step + 1
+            self.t = 0.0
+        end
+
+        if self.step > 175 then self.done = true end
+    end
+end
+
+
+function Fader:draw()
+    local c = 0
+    love.graphics.setColor(0, 0, 0)
+
+    for i = 0, 16 do
+        for j = 0, 10 do
+            if not self.reverse then
+                if c <= self.step then
+                    love.graphics.rectangle('fill', 20 * i, 20 * j, 20, 20)
+                end
+            else
+                if c <= self.step then else
+                    love.graphics.rectangle('fill', 20 * i, 20 * j, 20, 20)
+                end
+            end
+            c = c + 1
+        end
+    end
+
+    love.graphics.setColor()
+--     love.graphics.print(string.format('t: %s', self.t), 5, 35)
+--     love.graphics.print(string.format('step: %s', self.step), 5, 45)
+--     love.graphics.print(string.format('W: %s', love.graphics.getWidth()), 5, 55)
+--     love.graphics.print(string.format('H: %s', love.graphics.getHeight()), 5, 65)
+end
+
+
+------------------------------------------------------------------------------
+-- Module return
+------------------------------------------------------------------------------
+
+return Fader