sounds

const.lua

@@ -1,6 +1,6 @@
 ease = require 'lib.ease'
 
-FISH_SPLINE_QUALITY = 5 -- bigger number = more lag, smaller number = more noise
+FISH_SPLINE_QUALITY = 6 -- bigger number = more lag, smaller number = more noise
 FISH_RENDER_ITERS = 4 -- a bigger number allows for more smoother flipper movement and rotation, but is significantly laggier
 FISH_RENDER_ITEROFF = 0.025 -- should be 1/iters*0.1, lower numbers will make movement snappier and higher numbers will make it smoother but glitchier
 
@@ -11,8 +11,10 @@ FISH_EASE = ease.inOutSine -- ease used for fish movement
 FISH_ANGLE = 30 -- bigger angle allows for fish to swim further down/up at once
 FISH_FOLLOW_RANDOM = 10
 
-FISH_FOOD_CHECK_FREQ = 10 -- how often to check for food
-FISH_FOOD_COOLDOWN = 10
+FISH_FOOD_CHECK_FREQ = 1 -- how often to check for food
+FISH_FOOD_1_COOLDOWN = 10
+FISH_FOOD_2_COOLDOWN = 20
+FISH_FOOD_3_COOLDOWN = 25
 FISH_FOOD_HUNGRY = -5
 FISH_FOOD_DEAD = -15
 

lib/assets.lua

@@ -1,3 +1,5 @@
+require 'lib.audio'
+
 local assets = {}
 
 function assets.clear()
@@ -70,8 +72,8 @@ function assets.addAudio(base, d, type)
       if type == "sfx" then
         sound_path[audioname] = dir .. "/" .. file
 
-        if sounds and sounds[audioname] then
-          registerSound(audioname, sounds[audioname].volume)
+        if sounds then
+          registerSound(audioname, (sounds[audioname] or {}).volume or 1)
         end
       elseif type == "bgm" then
         music_path[audioname] = dir .. "/" .. file

lib/audio.lua

@@ -0,0 +1,34 @@
+local tick = require 'lib.tick'
+
+sfx_volume = 1
+
+sounds = {}
+local current_volume = 1
+local old_volume = 1
+local sound_instances = {}
+
+function registerSound(sound, volume)
+  sounds[sound] = {
+    data = love.sound.newSoundData(sound_path[sound]),
+    volume = volume or 1
+  }
+end
+
+function playSound(sound, volume, pitch)
+  if sounds[sound] then
+    if not sound_instances[sound] then
+      sound_instances[sound] = 0
+    end
+
+    local source = love.audio.newSource(sounds[sound].data, "static")
+
+    local adjusted_volume = 1/(2^sound_instances[sound])
+    source:setVolume((volume or 1) * adjusted_volume * sounds[sound].volume * sfx_volume)
+    source:setPitch(pitch or 1)
+
+    source:play()
+
+    sound_instances[sound] = sound_instances[sound] + 1
+    tick.delay(function() sound_instances[sound] = sound_instances[sound] - 1 end, sounds[sound].data:getDuration()/4)
+  end
+end

lib/tick.lua

@@ -0,0 +1,166 @@
+--
+-- tick
+--
+-- Copyright (c) 2015 rxi
+--
+-- This library is free software; you can redistribute it and/or modify it
+-- under the terms of the MIT license. See LICENSE for details.
+--
+
+local tick = { _version = "0.1.1" }
+tick.__index = tick
+
+
+local iscallable = function(x)
+  if type(x) == "function" then return true end
+  local mt = getmetatable(x)
+  return mt and mt.__call ~= nil
+end
+
+local noop = function()
+end
+
+
+local event = {}
+event.__index = event
+
+function event.new(parent, fn, delay, recur, err)
+  err = err or 0
+  -- Create and return event
+  return setmetatable({
+    parent  = parent,
+    delay   = delay,
+    timer   = delay + err,
+    fn      = fn,
+    recur   = recur,
+  }, event)
+end
+
+
+function event:after(fn, delay)
+  -- Error check
+  if self.recur then
+    error("cannot chain a recurring event")
+  end
+  -- Chain event
+  local oldfn = self.fn
+  local e = event.new(self.parent, fn, delay, false)
+  self.fn = function()
+    oldfn()
+    e.timer = e.timer + self.parent.err
+    self.parent:add(e)
+  end
+  return e
+end
+
+
+function event:stop()
+  tick.remove(self.parent, self)
+end
+
+
+
+function tick.group()
+  return setmetatable({ err = 0 }, tick)
+end
+
+
+function tick:add(e)
+  self[e] = true
+  table.insert(self, e)
+  return e
+end
+
+
+function tick:remove(e)
+  if type(e) == "number" then
+    -- Remove and return event
+    local idx = e
+    e = self[idx]
+    self[e] = nil
+    self[idx] = self[#self]
+    table.remove(self)
+    return e
+  end
+  self[e] = false
+  for i, v in ipairs(self) do
+    if v == e then
+      return self:remove(i)
+    end
+  end
+end
+
+
+function tick:update(dt)
+  for i = #self, 1, -1 do
+    local e = self[i]
+    e.timer = e.timer - dt
+    while e.timer <= 0 do
+      if e.recur then
+        e.timer = e.timer + e.delay
+      else
+        self:remove(i) 
+      end
+      self.err = e.timer
+      e.fn()
+      if not e.recur then
+        break
+      end
+    end
+  end
+  self.err = 0
+end
+
+
+function tick:event(fn, delay, recur)
+  delay = tonumber(delay)
+  -- Error check
+  if not iscallable(fn) then
+    error("expected `fn` to be callable")
+  end
+  if type(delay) ~= "number" then
+    error("expected `delay` to be a number")
+  end
+  if delay < 0 then
+    error("expected `delay` of zero or greater")
+  end
+  -- If, factoring in the timing error, the event should happen *now* the
+  -- function is immediately called and the error is temporarily carried
+  -- through. This assures nested events with delays shorter than the update()
+  -- delta-time do not accumulate error; several nested events with very small
+  -- delays may end up being called on the same frame. A dummy event is created
+  -- and returned so :after() still functions correctly.
+  local d = delay + self.err
+  if d < 0 then
+    local err = self.err
+    self.err = d
+    fn()
+    self.err = err
+    return self:add(event.new(self, noop, delay, recur, self.err))
+  end
+  -- Create, add and return a normal event
+  return self:add(event.new(self, fn, delay, recur, self.err))
+end
+
+
+function tick:delay(fn, delay)
+  return self:event(fn, delay, false)
+end
+
+
+function tick:recur(fn, delay)
+  return self:event(fn, delay, true)
+end
+
+
+local group = tick.group()
+
+local bound = {
+  update  = function(...) return tick.update(group, ...) end,
+  delay   = function(...) return tick.delay (group, ...) end,
+  recur   = function(...) return tick.recur (group, ...) end,
+  remove  = function(...) return tick.remove(group, ...) end,
+}
+setmetatable(bound, tick)
+
+return bound

main.lua

@@ -3,9 +3,11 @@ require 'util'
 
 constr = require 'constructors'
 
+require 'lib.audio'
 assets = require 'lib.assets'
 ease = require 'lib.ease'
 bench = require 'lib.benchmark'
+tick = require 'lib.tick'
 
 sprites = {}
 sound_path = {}
@@ -27,6 +29,7 @@ footerbuttons = {
     openanim = 1,
     open = true,
     func = function()
+      playSound('splash', 0.7, 0.8)
       table.insert(feesh, constr.fish(math.random(), 0.3))
     end
   },
@@ -118,6 +121,7 @@ local unfocusinterval = 5
 function love.update(dt)
   frame = frame + 1
   bench.update()
+  tick.update(dt)
 
   bench.startBenchmark('update')
   bench.startBenchmark('update_buttons')
@@ -261,16 +265,21 @@ function love.update(dt)
         local dist = math.abs(n.render.x - f.x) + math.abs(n.render.y - f.y)
 
         if dist < FOOD_HITBOX then 
+          playSound('slurp')
           table.remove(food, n.shortestfood)
-          n.eattimer = FISH_FOOD_COOLDOWN
+          local cooldowns = {FISH_FOOD_1_COOLDOWN, FISH_FOOD_2_COOLDOWN, FISH_FOOD_3_COOLDOWN}
+
+          n.eattimer = cooldowns[f.type]
           n.render.eattimer = 0
           n.shortestfood = -1
 
-          if n.lifetime > FISH_AGE_MEDIUM then
+          if n.lifetime > FISH_AGE_MEDIUM and n.size == 0 then
             n.size = 1
+            playSound('grow')
           end
-          if n.lifetime > FISH_AGE_BIG then
+          if n.lifetime > FISH_AGE_BIG and n.size == 1 then
             n.size = 2
+            playSound('grow')
           end
         end
       end
@@ -314,7 +323,7 @@ function love.update(dt)
     n.render.turn = n.render.turn + dt * math.sign(n.render.x - n.render.prevx) * 2
     n.render.turn = clamp(n.render.turn, 0, 1)
     if n.render.turn == 0 or n.render.turn == 1 then
-      n.render.swim = (n.render.swim + dt * math.abs(n.render.xspeed) * 300) % 1
+      n.render.swim = (n.render.swim + dt * (math.abs(n.render.xspeed) * 250 + 0.5)) % 1
     else
       n.render.swim = 0
     end
@@ -332,6 +341,9 @@ function love.update(dt)
     n.render.hungry = clamp(n.render.hungry + dt * m * 3, 0, 1)
     bench.stopBenchmark('update_fish_render')
 
+    if n.eattimer <= FISH_FOOD_DEAD and not n.dead then
+      playSound('die')
+    end
     if n.eattimer <= FISH_FOOD_DEAD then
       n.dead = true
 
@@ -631,10 +643,9 @@ end
 function love.mousepressed(x, y, b)
   if b == 1 and y > FOOTER_HEIGHT and #food < foodcount then
     table.insert(food, constr.food(x/love.graphics.getWidth(), y/love.graphics.getHeight(), foodtier))
+    playSound('dropfood')
   end
-end
 
-function love.mousereleased(x, y, b)
   local footerheight = FOOTER_HEIGHT * love.graphics.getWidth()/640
   local size = footerheight / FOOTER_HEIGHT
 
@@ -646,6 +657,7 @@ function love.mousereleased(x, y, b)
       if hovered then
         if footerbuttons[i] and footerbuttons[i].open then
           footerbuttons[i].func(footerbuttons[i])
+          playSound('buttonclick')
         end
       end
 
@@ -657,6 +669,10 @@ function love.mousereleased(x, y, b)
   end
 end
 
+function love.mousereleased(x, y, b)
+
+end
+
 function love.keypressed(key)
   if key == 'f3' then
     debug = not debug

util.lua

@@ -56,3 +56,11 @@ end
 function math.sign(a)
   if a >= 0 then return 1 else return -1 end
 end
+
+function string.starts(str, start)
+  return str:sub(1, #start) == start
+end
+
+function string.ends(str, ending)
+  return ending == "" or str:sub(-#ending) == ending
+end