Marble controller.

main.lua

@@ -1,6 +1,9 @@
 local love = love
+step = 1.0 / 120.0
+local step = step
 local sitelenpona
 local text
+local marble
 
 local sounds = {
 
@@ -15,28 +18,16 @@ state = {
     state.beat = {}
     state.startTime = love.timer.getTime()
     state.currentBeat = 1
+    state.timeToSimulate = 0.0
   end,
 
+  timeToSimulate = 0.0,
   isGameStarted = false,
   beatScoreThreshold = 1.0,
+  lastBeatScore = 0.0,
   currentBeat = 1,
   startTime = 0.0,
   
-  stickX = 0.0,
-  stickY = 0.0,
-  stickT = 0.0,
-
-  particle = {
-    x = 0.0,
-    y = 0.0,
-    dx = 0.0,
-    dy = 0.0,
-    ddx = 0.0,
-    ddy = 0.0,
-    Update = function() end,
-    Draw = function() end
-  },
-
   wave = {
     x   = { 1.0, 0.0, -0.5, 0.2, 0.4, 0.8, 0.3, 0.9, -0.4, 0.8, 0.5, 0.1, -0.9 },
     dx  = { 1.0, 0.0, -0.5, 0.2, 0.4, 0.8, 0.3, 0.9, -0.4, 0.8, 0.5, 0.1, -0.9 },
@@ -62,10 +53,13 @@ state = {
 }
 
 function love.load()
+  love.graphics.setBackgroundColor( 245 / 255, 169 / 255, 184 / 255 ) --Trans pink.
+  --love.graphics.setBackgroundColor( 91 / 255, 206 / 255, 250 / 255 ) --Trans blue.
   sounds.goodPing = love.audio.newSource("soundTest.ogg", "static")
   sounds.badPing = love.audio.newSource("chime8.ogg", "static")
   sitelenpona = assert( require "sitelenpona" )
   text = assert( require "text" )
+  marble = assert( require "marble" )
   return state.Reset()
 
 end
@@ -101,7 +95,7 @@ local function BeatScore( t )
 
   --Calculate beat score.
   local score = dt * dt / ( mu * mu )
-  local TOLERANCE = 1.00001
+  local TOLERANCE = 1.04
   if dt < mu then 
     return TOLERANCE * score
   else
@@ -117,6 +111,8 @@ end
 local function OnImpact( impact )
 
   local score = BeatScore( impact.t )
+  --DEBUG
+  state.lastBeatScore = score
   if score > state.beatScoreThreshold then
 
     state.beatScoreThreshold = 1.0
@@ -142,8 +138,9 @@ function love.draw()
   love.graphics.print( state.beat.mu or 0, 0)
   love.graphics.print( state.beat.t or 0, 0, 10)
   love.graphics.print( state.beatScoreThreshold, 0, 20)
-  love.graphics.setColor(0, 0.4, 0.4)
+  love.graphics.print( state.lastBeatScore, 0, 30 )
   sitelenpona.Draw( text.tok[state.currentBeat] )
+  marble.Draw()
   love.graphics.setColor(0.5, 0.2, 0.8, 0.5)
   love.graphics.circle("fill", 0, 0, 10)
 end
@@ -151,29 +148,19 @@ end
 
 
 function love.update( dt )
-
+  dt = dt + state.timeToSimulate
-end
+  while dt > step do
-
+    marble.Update()
-local function UpdateStick()
+    dt = dt - step
-  state.stickT = love.timer.getTime()
-  local x = (love.keyboard.isDown( "w" ) and 1.0 or 0.0) - (love.keyboard.isDown( "s" ) and 1.0 or 0.0)
-  local y = (love.keyboard.isDown( "d" ) and 1.0 or 0.0) - (love.keyboard.isDown( "a" ) and 1.0 or 0.0)
-  local n = math.sqrt( x * x + y * y )
-  if n < 0.001 then
-    state.stickX = x
-    state.stickY = y
-  else
-    state.stickX = x / n
-    state.stickY = y / n
   end
 end
 
 function love.keypressed( key, code, isRepeat )
   if key == "escape" then return love.event.quit() end
-  if key == "enter" then return OnImpact{ t = love.timer.getTime() } end
+  if key == "return" then return OnImpact{ t = love.timer.getTime() } end
-  return UpdateStick()
+  return marble.OnKey()
 end
 
 function love.keyreleased( key, code )
-  return UpdateStick()
+  return marble.OnKey()
 end

marble.lua

@@ -0,0 +1,57 @@
+--Character controller. Renders point particle.
+local love = love
+local step = assert( step )
+local state 
+local FRICTION = 0.005
+local MAXSPEED = 1.0
+
+local t, x, y, dx, dy, ddx, ddy
+
+local function Update()
+  t = love.timer.getTime()
+
+  dx = (1.0 - FRICTION) * dx + FRICTION * ddx
+  dy = (1.0 - FRICTION) * dy + FRICTION * ddy
+  x = x + dx * step * MAXSPEED
+  y = y + dy * step * MAXSPEED
+end
+
+local function OnKey()
+  ddx = (love.keyboard.isScancodeDown( "d" ) and 1.0 or 0.0) - (love.keyboard.isScancodeDown( "a" ) and 1.0 or 0.0)
+  ddy = (love.keyboard.isScancodeDown( "s" ) and 1.0 or 0.0) - (love.keyboard.isScancodeDown( "w" ) and 1.0 or 0.0)
+  
+  local n = math.sqrt( ddx * ddx + ddy * ddy )
+  if n < 0.001 then return end
+  ddx, ddy = ddx / n, ddy / n
+end
+
+local function Draw()
+  local dt = love.timer.getTime() - t
+  local rx, ry = x + dt * dx, y + dt * dy
+  love.graphics.setColor( 0.0, 0.0, 0.0, 0.8 )
+  love.graphics.circle( "fill", rx, ry, 10 )
+end
+
+local function Impact( impact )
+  
+end
+
+local function Reset()
+  t = love.timer.getTime()
+  x = 0
+  y = 0
+  dx = 0
+  dy = 0
+  ddx = 0
+  ddy = 0
+end
+
+Reset()
+
+return {
+  Update = Update,
+  OnKey = OnKey,
+  Draw = Draw,
+  Impact = Impact,
+  Reset = Reset,
+}