Logo + Raum-Schedule angefangen

ffnord-con-2015-2/logo/logo.svg

@@ -0,0 +1,130 @@
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ffnord-con-2015-2/logo/node.lua

@@ -0,0 +1,8 @@
+gl.setup(1280, 720)
+
+background = resource.load_image("logo.png")
+
+function node.render()
+    gl.clear(0.1, 0.1, 0.1, 1)
+    background:draw(0, 0, WIDTH, HEIGHT)
+end

ffnord-con-2015-2/node.lua

@@ -1,6 +1,6 @@
 gl.setup(1280, 720)
 
 function node.render()
-    resource.render_child("31c3"):draw(0, 0, 1280, 720)
-    resource.render_child("29c3"):draw(0, 0, 1280, 720)
+    resource.render_child("room"):draw(0, 0, 1280, 720)
+--    resource.render_child("logo"):draw(0, 0, 1280, 720)
 end

ffnord-con-2015-2/room/README.txt

@@ -0,0 +1,14 @@
+Room visualization used at 30c3.
+
+This is almost the code that ran at 30c3. I had to remove the font used 
+as the font used at 30c3 cannot be redistributed. The replacement font
+is "Roboto light". See http://www.fontsquirrel.com/license/roboto
+
+Installation:
+    
+    Nothing to do
+
+Usage:
+    
+    start info-beamer for this directory.
+    Then run ./service

ffnord-con-2015-2/room/config.json

@@ -0,0 +1,15 @@
+{
+    "devices": {
+        "2429607372": "attraktor"
+    },
+    "rooms": {
+        "attraktor": {
+            "dect": "",
+            "translation": "",
+            "twitter": "#ffnord",
+            "irc": "#ffnord",
+            "texture": "marble",
+            "speed": 70
+        }
+    }
+}

ffnord-con-2015-2/room/json.lua

@@ -0,0 +1,377 @@
+-----------------------------------------------------------------------------
+-- JSON4Lua: JSON encoding / decoding support for the Lua language.
+-- json Module.
+-- Author: Craig Mason-Jones
+-- Homepage: http://json.luaforge.net/
+-- Version: 0.9.40
+-- This module is released under the MIT License (MIT).
+-- Please see LICENCE.txt for details.
+--
+-- USAGE:
+-- This module exposes two functions:
+--   encode(o)
+--     Returns the table / string / boolean / number / nil / json.null value as a JSON-encoded string.
+--   decode(json_string)
+--     Returns a Lua object populated with the data encoded in the JSON string json_string.
+--
+-- REQUIREMENTS:
+--   compat-5.1 if using Lua 5.0
+--
+-- CHANGELOG
+--   0.9.20 Introduction of local Lua functions for private functions (removed _ function prefix). 
+--          Fixed Lua 5.1 compatibility issues.
+--   		Introduced json.null to have null values in associative arrays.
+--          encode() performance improvement (more than 50%) through table.concat rather than ..
+--          Introduced decode ability to ignore /**/ comments in the JSON string.
+--   0.9.10 Fix to array encoding / decoding to correctly manage nil/null values in arrays.
+-----------------------------------------------------------------------------
+
+-----------------------------------------------------------------------------
+-- Imports and dependencies
+-----------------------------------------------------------------------------
+local math = require('math')
+local string = require("string")
+local table = require("table")
+
+local base = _G
+
+-----------------------------------------------------------------------------
+-- Module declaration
+-----------------------------------------------------------------------------
+module("json")
+
+-- Public functions
+
+-- Private functions
+local decode_scanArray
+local decode_scanComment
+local decode_scanConstant
+local decode_scanNumber
+local decode_scanObject
+local decode_scanString
+local decode_scanWhitespace
+local encodeString
+local isArray
+local isEncodable
+
+-----------------------------------------------------------------------------
+-- PUBLIC FUNCTIONS
+-----------------------------------------------------------------------------
+--- Encodes an arbitrary Lua object / variable.
+-- @param v The Lua object / variable to be JSON encoded.
+-- @return String containing the JSON encoding in internal Lua string format (i.e. not unicode)
+function encode (v)
+  -- Handle nil values
+  if v==nil then
+    return "null"
+  end
+  
+  local vtype = base.type(v)  
+
+  -- Handle strings
+  if vtype=='string' then    
+    return '"' .. encodeString(v) .. '"'	    -- Need to handle encoding in string
+  end
+  
+  -- Handle booleans
+  if vtype=='number' or vtype=='boolean' then
+    return base.tostring(v)
+  end
+  
+  -- Handle tables
+  if vtype=='table' then
+    local rval = {}
+    -- Consider arrays separately
+    local bArray, maxCount = isArray(v)
+    if bArray then
+      for i = 1,maxCount do
+        table.insert(rval, encode(v[i]))
+      end
+    else	-- An object, not an array
+      for i,j in base.pairs(v) do
+        if isEncodable(i) and isEncodable(j) then
+          table.insert(rval, '"' .. encodeString(i) .. '":' .. encode(j))
+        end
+      end
+    end
+    if bArray then
+      return '[' .. table.concat(rval,',') ..']'
+    else
+      return '{' .. table.concat(rval,',') .. '}'
+    end
+  end
+  
+  -- Handle null values
+  if vtype=='function' and v==null then
+    return 'null'
+  end
+  
+  base.assert(false,'encode attempt to encode unsupported type ' .. vtype .. ':' .. base.tostring(v))
+end
+
+
+--- Decodes a JSON string and returns the decoded value as a Lua data structure / value.
+-- @param s The string to scan.
+-- @param [startPos] Optional starting position where the JSON string is located. Defaults to 1.
+-- @param Lua object, number The object that was scanned, as a Lua table / string / number / boolean or nil,
+-- and the position of the first character after
+-- the scanned JSON object.
+function decode(s, startPos)
+  startPos = startPos and startPos or 1
+  startPos = decode_scanWhitespace(s,startPos)
+  base.assert(startPos<=string.len(s), 'Unterminated JSON encoded object found at position in [' .. s .. ']')
+  local curChar = string.sub(s,startPos,startPos)
+  -- Object
+  if curChar=='{' then
+    return decode_scanObject(s,startPos)
+  end
+  -- Array
+  if curChar=='[' then
+    return decode_scanArray(s,startPos)
+  end
+  -- Number
+  if string.find("+-0123456789.e", curChar, 1, true) then
+    return decode_scanNumber(s,startPos)
+  end
+  -- String
+  if curChar==[["]] or curChar==[[']] then
+    return decode_scanString(s,startPos)
+  end
+  if string.sub(s,startPos,startPos+1)=='/*' then
+    return decode(s, decode_scanComment(s,startPos))
+  end
+  -- Otherwise, it must be a constant
+  return decode_scanConstant(s,startPos)
+end
+
+--- The null function allows one to specify a null value in an associative array (which is otherwise
+-- discarded if you set the value with 'nil' in Lua. Simply set t = { first=json.null }
+function null()
+  return null -- so json.null() will also return null ;-)
+end
+-----------------------------------------------------------------------------
+-- Internal, PRIVATE functions.
+-- Following a Python-like convention, I have prefixed all these 'PRIVATE'
+-- functions with an underscore.
+-----------------------------------------------------------------------------
+
+--- Scans an array from JSON into a Lua object
+-- startPos begins at the start of the array.
+-- Returns the array and the next starting position
+-- @param s The string being scanned.
+-- @param startPos The starting position for the scan.
+-- @return table, int The scanned array as a table, and the position of the next character to scan.
+function decode_scanArray(s,startPos)
+  local array = {}	-- The return value
+  local stringLen = string.len(s)
+  base.assert(string.sub(s,startPos,startPos)=='[','decode_scanArray called but array does not start at position ' .. startPos .. ' in string:\n'..s )
+  startPos = startPos + 1
+  -- Infinite loop for array elements
+  repeat
+    startPos = decode_scanWhitespace(s,startPos)
+    base.assert(startPos<=stringLen,'JSON String ended unexpectedly scanning array.')
+    local curChar = string.sub(s,startPos,startPos)
+    if (curChar==']') then
+      return array, startPos+1
+    end
+    if (curChar==',') then
+      startPos = decode_scanWhitespace(s,startPos+1)
+    end
+    base.assert(startPos<=stringLen, 'JSON String ended unexpectedly scanning array.')
+    object, startPos = decode(s,startPos)
+    table.insert(array,object)
+  until false
+end
+
+--- Scans a comment and discards the comment.
+-- Returns the position of the next character following the comment.
+-- @param string s The JSON string to scan.
+-- @param int startPos The starting position of the comment
+function decode_scanComment(s, startPos)
+  base.assert( string.sub(s,startPos,startPos+1)=='/*', "decode_scanComment called but comment does not start at position " .. startPos)
+  local endPos = string.find(s,'*/',startPos+2)
+  base.assert(endPos~=nil, "Unterminated comment in string at " .. startPos)
+  return endPos+2  
+end
+
+--- Scans for given constants: true, false or null
+-- Returns the appropriate Lua type, and the position of the next character to read.
+-- @param s The string being scanned.
+-- @param startPos The position in the string at which to start scanning.
+-- @return object, int The object (true, false or nil) and the position at which the next character should be 
+-- scanned.
+function decode_scanConstant(s, startPos)
+  local consts = { ["true"] = true, ["false"] = false, ["null"] = nil }
+  local constNames = {"true","false","null"}
+
+  for i,k in base.pairs(constNames) do
+    --print ("[" .. string.sub(s,startPos, startPos + string.len(k) -1) .."]", k)
+    if string.sub(s,startPos, startPos + string.len(k) -1 )==k then
+      return consts[k], startPos + string.len(k)
+    end
+  end
+  base.assert(nil, 'Failed to scan constant from string ' .. s .. ' at starting position ' .. startPos)
+end
+
+--- Scans a number from the JSON encoded string.
+-- (in fact, also is able to scan numeric +- eqns, which is not
+-- in the JSON spec.)
+-- Returns the number, and the position of the next character
+-- after the number.
+-- @param s The string being scanned.
+-- @param startPos The position at which to start scanning.
+-- @return number, int The extracted number and the position of the next character to scan.
+function decode_scanNumber(s,startPos)
+  local endPos = startPos+1
+  local stringLen = string.len(s)
+  local acceptableChars = "+-0123456789.e"
+  while (string.find(acceptableChars, string.sub(s,endPos,endPos), 1, true)
+	and endPos<=stringLen
+	) do
+    endPos = endPos + 1
+  end
+  local stringValue = 'return ' .. string.sub(s,startPos, endPos-1)
+  local stringEval = base.loadstring(stringValue)
+  base.assert(stringEval, 'Failed to scan number [ ' .. stringValue .. '] in JSON string at position ' .. startPos .. ' : ' .. endPos)
+  return stringEval(), endPos
+end
+
+--- Scans a JSON object into a Lua object.
+-- startPos begins at the start of the object.
+-- Returns the object and the next starting position.
+-- @param s The string being scanned.
+-- @param startPos The starting position of the scan.
+-- @return table, int The scanned object as a table and the position of the next character to scan.
+function decode_scanObject(s,startPos)
+  local object = {}
+  local stringLen = string.len(s)
+  local key, value
+  base.assert(string.sub(s,startPos,startPos)=='{','decode_scanObject called but object does not start at position ' .. startPos .. ' in string:\n' .. s)
+  startPos = startPos + 1
+  repeat
+    startPos = decode_scanWhitespace(s,startPos)
+    base.assert(startPos<=stringLen, 'JSON string ended unexpectedly while scanning object.')
+    local curChar = string.sub(s,startPos,startPos)
+    if (curChar=='}') then
+      return object,startPos+1
+    end
+    if (curChar==',') then
+      startPos = decode_scanWhitespace(s,startPos+1)
+    end
+    base.assert(startPos<=stringLen, 'JSON string ended unexpectedly scanning object.')
+    -- Scan the key
+    key, startPos = decode(s,startPos)
+    base.assert(startPos<=stringLen, 'JSON string ended unexpectedly searching for value of key ' .. key)
+    startPos = decode_scanWhitespace(s,startPos)
+    base.assert(startPos<=stringLen, 'JSON string ended unexpectedly searching for value of key ' .. key)
+    base.assert(string.sub(s,startPos,startPos)==':','JSON object key-value assignment mal-formed at ' .. startPos)
+    startPos = decode_scanWhitespace(s,startPos+1)
+    base.assert(startPos<=stringLen, 'JSON string ended unexpectedly searching for value of key ' .. key)
+    value, startPos = decode(s,startPos)
+    object[key]=value
+  until false	-- infinite loop while key-value pairs are found
+end
+
+--- Scans a JSON string from the opening inverted comma or single quote to the
+-- end of the string.
+-- Returns the string extracted as a Lua string,
+-- and the position of the next non-string character
+-- (after the closing inverted comma or single quote).
+-- @param s The string being scanned.
+-- @param startPos The starting position of the scan.
+-- @return string, int The extracted string as a Lua string, and the next character to parse.
+function decode_scanString(s,startPos)
+  base.assert(startPos, 'decode_scanString(..) called without start position')
+  local startChar = string.sub(s,startPos,startPos)
+  base.assert(startChar==[[']] or startChar==[["]],'decode_scanString called for a non-string')
+  local escaped = false
+  local endPos = startPos + 1
+  local bEnded = false
+  local stringLen = string.len(s)
+  repeat
+    local curChar = string.sub(s,endPos,endPos)
+    -- Character escaping is only used to escape the string delimiters
+    if not escaped then	
+      if curChar==[[\]] then
+        escaped = true
+      else
+        bEnded = curChar==startChar
+      end
+    else
+      -- If we're escaped, we accept the current character come what may
+      escaped = false
+    end
+    endPos = endPos + 1
+    base.assert(endPos <= stringLen+1, "String decoding failed: unterminated string at position " .. endPos)
+  until bEnded
+  local stringValue = 'return ' .. string.sub(s, startPos, endPos-1)
+  local stringEval = base.loadstring(stringValue)
+  base.assert(stringEval, 'Failed to load string [ ' .. stringValue .. '] in JSON4Lua.decode_scanString at position ' .. startPos .. ' : ' .. endPos)
+  return stringEval(), endPos  
+end
+
+--- Scans a JSON string skipping all whitespace from the current start position.
+-- Returns the position of the first non-whitespace character, or nil if the whole end of string is reached.
+-- @param s The string being scanned
+-- @param startPos The starting position where we should begin removing whitespace.
+-- @return int The first position where non-whitespace was encountered, or string.len(s)+1 if the end of string
+-- was reached.
+function decode_scanWhitespace(s,startPos)
+  local whitespace=" \n\r\t"
+  local stringLen = string.len(s)
+  while ( string.find(whitespace, string.sub(s,startPos,startPos), 1, true)  and startPos <= stringLen) do
+    startPos = startPos + 1
+  end
+  return startPos
+end
+
+--- Encodes a string to be JSON-compatible.
+-- This just involves back-quoting inverted commas, back-quotes and newlines, I think ;-)
+-- @param s The string to return as a JSON encoded (i.e. backquoted string)
+-- @return The string appropriately escaped.
+function encodeString(s)
+  s = string.gsub(s,'\\','\\\\')
+  s = string.gsub(s,'"','\\"')
+  s = string.gsub(s,"'","\\'")
+  s = string.gsub(s,'\n','\\n')
+  s = string.gsub(s,'\t','\\t')
+  return s 
+end
+
+-- Determines whether the given Lua type is an array or a table / dictionary.
+-- We consider any table an array if it has indexes 1..n for its n items, and no
+-- other data in the table.
+-- I think this method is currently a little 'flaky', but can't think of a good way around it yet...
+-- @param t The table to evaluate as an array
+-- @return boolean, number True if the table can be represented as an array, false otherwise. If true,
+-- the second returned value is the maximum
+-- number of indexed elements in the array. 
+function isArray(t)
+  -- Next we count all the elements, ensuring that any non-indexed elements are not-encodable 
+  -- (with the possible exception of 'n')
+  local maxIndex = 0
+  for k,v in base.pairs(t) do
+    if (base.type(k)=='number' and math.floor(k)==k and 1<=k) then	-- k,v is an indexed pair
+      if (not isEncodable(v)) then return false end	-- All array elements must be encodable
+      maxIndex = math.max(maxIndex,k)
+    else
+      if (k=='n') then
+        if v ~= table.getn(t) then return false end  -- False if n does not hold the number of elements
+      else -- Else of (k=='n')
+        if isEncodable(v) then return false end
+      end  -- End of (k~='n')
+    end -- End of k,v not an indexed pair
+  end  -- End of loop across all pairs
+  return true, maxIndex
+end
+
+--- Determines whether the given Lua object / table / variable can be JSON encoded. The only
+-- types that are JSON encodable are: string, boolean, number, nil, table and json.null.
+-- In this implementation, all other types are ignored.
+-- @param o The object to examine.
+-- @return boolean True if the object should be JSON encoded, false if it should be ignored.
+function isEncodable(o)
+  local t = base.type(o)
+  return (t=='string' or t=='boolean' or t=='number' or t=='nil' or t=='table') or (t=='function' and o==null) 
+end
+

ffnord-con-2015-2/room/logo.svg

@@ -0,0 +1,114 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="410"
+   height="210"
+   viewBox="0 0 410 210"
+   id="svg3363"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="logo.svg"
+   inkscape:export-filename="/home/baldo/projects/ffhh/ffnord-info-beamer/ffnord-con-2015-2/room/logo.png"
+   inkscape:export-xdpi="90"
+   inkscape:export-ydpi="90">
+  <defs
+     id="defs3365" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="3.959798"
+     inkscape:cx="184.07151"
+     inkscape:cy="90.89919"
+     inkscape:document-units="px"
+     inkscape:current-layer="g3418"
+     showgrid="false"
+     units="px"
+     inkscape:window-width="2560"
+     inkscape:window-height="1417"
+     inkscape:window-x="0"
+     inkscape:window-y="23"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata3368">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-842.36224)">
+    <g
+       id="g3527"
+       transform="matrix(1.7382264,0,0,1.7382264,-46.776992,-857.16085)"
+       inkscape:export-xdpi="90"
+       inkscape:export-ydpi="90">
+      <text
+         sodipodi:linespacing="125%"
+         id="text4174"
+         y="1033.4785"
+         x="23.347813"
+         style="font-style:normal;font-weight:normal;font-size:67.51537323px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#40b6e7;fill-opacity:1;stroke:#009ee0;stroke-width:0.4578445;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+         xml:space="preserve"><tspan
+           style="font-style:normal;font-variant:normal;font-weight:800;font-stretch:normal;font-family:Oswald;-inkscape-font-specification:'Oswald Ultra-Bold';fill:#40b6e7;fill-opacity:1;stroke:#009ee0;stroke-width:0.4578445;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none"
+           y="1033.4785"
+           x="23.347813"
+           id="tspan4176"
+           sodipodi:role="line">FFNORD</tspan></text>
+      <g
+         transform="matrix(0.45784451,0,0,0.45784451,-157.33141,596.41996)"
+         id="g3418">
+        <text
+           sodipodi:linespacing="125%"
+           id="text4212"
+           y="1032.0195"
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+           style="font-style:normal;font-weight:normal;font-size:82.68903351px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#ffc640;fill-opacity:1;stroke:#ffb400;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;"
+           xml:space="preserve"><tspan
+             dx="0 0 0"
+             style="font-style:normal;font-variant:normal;font-weight:800;font-stretch:normal;font-family:Oswald;-inkscape-font-specification:'Oswald Ultra-Bold';fill:#ffc640;fill-opacity:1;stroke:#ffb400;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;"
+             y="1032.0195"
+             x="478.35355"
+             id="tspan4214"
+             sodipodi:role="line">CON</tspan></text>
+        <text
+           xml:space="preserve"
+           style="font-style:normal;font-weight:normal;font-size:82.68903351px;line-height:125%;font-family:Sans;letter-spacing:0px;word-spacing:0px;fill:#e44081;fill-opacity:1;stroke:#dc0067;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;"
+           x="620.80359"
+           y="1032.0195"
+           id="text4274"
+           sodipodi:linespacing="125%"><tspan
+             sodipodi:role="line"
+             id="tspan4276"
+             x="620.80359"
+             y="1032.0195"
+             style="font-style:normal;font-variant:normal;font-weight:800;font-stretch:normal;font-family:Oswald;-inkscape-font-specification:'Oswald Ultra-Bold';fill:#e44081;fill-opacity:1;stroke:#dc0067;stroke-width:1;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;"
+             dx="5.5911546">2015.2</tspan></text>
+        <polygon
+           style="fill:#ffc640;fill-opacity:1;stroke:#ffb400;stroke-width:0.18134066;stroke-linecap:round;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none"
+           points="31,44 26,44 30,48 22,48 22,52 30,52 26,56 31,56 37,50 "
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+      </g>
+    </g>
+  </g>
+</svg>

ffnord-con-2015-2/room/node.lua

@@ -0,0 +1,318 @@
+gl.setup(1280, 720)
+
+font = resource.load_font("Oswald-Medium.ttf")
+
+node.alias("room")
+
+local json = require "json"
+
+-- Configure room here
+local SAAL = "attraktor"
+
+util.auto_loader(_G)
+
+util.file_watch("schedule.json", function(content)
+    print("reloading schedule")
+    talks = json.decode(content)
+end)
+
+util.file_watch("config.json", function(content)
+    local config = json.decode(content)
+    if sys.get_env then
+        saal = config.devices[sys.get_env("SERIAL")]
+    end
+    if not saal then
+        print("using statically configured saal identifier")
+        saal = SAAL
+    end
+    print(saal)
+    rooms = config.rooms
+    room = config.rooms[saal]
+end)
+
+local base_time = N.base_time or 0
+local current_talk
+local all_talks = {}
+local day = 0
+
+function get_now()
+    return base_time + sys.now()
+end
+
+function check_next_talk()
+    local now = get_now()
+    local room_next = {}
+    for idx, talk in ipairs(talks) do
+        if rooms[talk.place] and not room_next[talk.place] and talk.unix + 25 * 60 > now then 
+            room_next[talk.place] = talk
+        end
+    end
+
+    for room, talk in pairs(room_next) do
+        talk.lines = wrap(talk.title, 30)
+    end
+
+    if room_next[saal] then
+        current_talk = room_next[saal]
+    else
+        current_talk = nil
+    end
+
+    all_talks = {}
+    for room, talk in pairs(room_next) do
+        if current_talk and room ~= current_talk.place then
+            all_talks[#all_talks + 1] = talk
+        end
+    end
+    table.sort(all_talks, function(a, b) 
+        if a.unix < b.unix then
+            return true
+        elseif a.unix > b.unix then
+            return false
+        else
+            return a.place < b.place
+        end
+    end)
+end
+
+function wrap(str, limit, indent, indent1)
+    limit = limit or 72
+    local here = 1
+    local wrapped = str:gsub("(%s+)()(%S+)()", function(sp, st, word, fi)
+        if fi-here > limit then
+            here = st
+            return "\n"..word
+        end
+    end)
+    local splitted = {}
+    for token in string.gmatch(wrapped, "[^\n]+") do
+        splitted[#splitted + 1] = token
+    end
+    return splitted
+end
+
+local clock = (function()
+    local base_time = N.base_time or 0
+
+    local function set(time)
+        base_time = tonumber(time) - sys.now()
+    end
+
+    util.data_mapper{
+        ["clock/midnight"] = function(since_midnight)
+            set(since_midnight)
+        end;
+    }
+
+    local left = 0
+
+    local function get()
+        local time = (base_time + sys.now()) % 86400
+        return string.format("%d:%02d", math.floor(time / 3600), math.floor(time % 3600 / 60))
+    end
+
+    return {
+        get = get;
+        set = set;
+    }
+end)()
+
+check_next_talk()
+
+util.data_mapper{
+    ["clock/set"] = function(time)
+        base_time = tonumber(time) - sys.now()
+        N.base_time = base_time
+        check_next_talk()
+        print("UPDATED TIME", base_time)
+    end;
+    ["clock/day"] = function(new_day)
+        print("DAY", new_day)
+        day = new_day
+    end;
+}
+
+function switcher(screens)
+    local current_idx = 1
+    local current = screens[current_idx]
+    local switch = sys.now() + current.time
+    local switched = sys.now()
+
+    local blend = 0.5
+    
+    local function draw()
+        local now = sys.now()
+
+        local percent = ((now - switched) / (switch - switched)) * 3.14129 * 2 - 3.14129
+        progress:use{percent = percent}
+        white:draw(WIDTH-50, HEIGHT-50, WIDTH-10, HEIGHT-10)
+        progress:deactivate()
+
+        if now - switched < blend then
+            local delta = (switched - now) / blend
+            gl.pushMatrix()
+            gl.translate(WIDTH/2, 0)
+            gl.rotate(270-90 * delta, 0, 1, 0)
+            gl.translate(-WIDTH/2, 0)
+            current.draw()
+            gl.popMatrix()
+        elseif now < switch - blend then
+            current.draw(now - switched)
+        elseif now < switch then
+            local delta = 1 - (switch - now) / blend
+            gl.pushMatrix()
+            gl.translate(WIDTH/2, 0)
+            gl.rotate(90 * delta, 0, 1, 0)
+            gl.translate(-WIDTH/2, 0)
+            current.draw()
+            gl.popMatrix()
+        else
+            current_idx = current_idx + 1
+            if current_idx > #screens then
+                current_idx = 1
+            end
+            current = screens[current_idx]
+            switch = now + current.time
+            switched = now
+        end
+    end
+    return {
+        draw = draw;
+    }
+end
+
+content = switcher{
+--[[    {
+        time = 10;
+        draw = function()
+            font:write(400, 200, "Other rooms", 80, 1,1,1,1)
+            white:draw(0, 300, WIDTH, 302, 0.6)
+            y = 320
+            local time_sep = false
+            if #all_talks > 0 then
+                for idx, talk in ipairs(all_talks) do
+                    if not time_sep and talk.unix > get_now() then
+                        if idx > 1 then
+                            y = y + 5
+                            white:draw(0, y, WIDTH, y+2, 0.6)
+                            y = y + 20
+                        end
+                        time_sep = true
+                    end
+
+                    local alpha = 1
+                    if not time_sep then
+                        alpha = 0.3
+                    end
+                    font:write(30, y, talk.start, 50, 1,1,1,alpha)
+                    font:write(190, y, talk.place, 50, 1,1,1,alpha)
+                    font:write(400, y, talk.lines[math.floor((sys.now()/2) % #talk.lines)+1], 50, 1,1,1,alpha)
+                    y = y + 60
+                end
+            else
+                font:write(400, 330, "No other talks.", 50, 1,1,1,1)
+            end
+        end
+    }, --]] {
+        time = 30;
+        draw = function()
+            if not current_talk then
+                redU(400, 200, "Next session...", 80, 1,1,1,1)
+                white:draw(0, 300, WIDTH, 302, 0.6)
+                redU(400, 330, "Nope. That's it.", 80)
+
+            else
+                local delta = current_talk.unix - get_now()
+                if delta > 0 then
+                    redU(400, 200, "Next session", 80)
+                else
+                    redU(400, 200, "This session", 80)
+                end
+                white:draw(0, 300, WIDTH, 302, 0.6)
+
+                blue(130, 330, current_talk.start, 50, 1,1,1,1)
+                if delta > 0 then
+                    blue(130, 330 + 60, string.format("in %d min", math.floor(delta/60)+1), 50)
+                end
+                for idx, line in ipairs(current_talk.lines) do
+                    if idx >= 5 then
+                        break
+                    end
+                    yellow(400, 330 - 60 + 60 * idx, line, 50)
+                end
+                for i, speaker in ipairs(current_talk.speakers) do
+                    blue(400, 510 + 50 * i, speaker, 50)
+                end
+            end
+        end
+    }, --[[ {
+        time = 10;
+        draw = function(t)
+            font:write(400, 200, "Room info", 80, 1,1,1,1)
+            white:draw(0, 300, WIDTH, 302, 0.6)
+            font:write(30, 320, "Audio", 50, 1,1,1,1)
+            font:write(400, 320, "Dial " .. room.dect, 50, 1,1,1,1)
+
+            font:write(30, 380, "Translation", 50, 1,1,1,1)
+            font:write(400, 380, "Dial " .. room.translation, 50, 1,1,1,1)
+
+            font:write(30, 480, "IRC", 50, 1,1,1,1)
+            font:write(400, 480, room.irc, 50, 1,1,1,1)
+
+            font:write(30, 540, "Twitter", 50, 1,1,1,1)
+            font:write(400, 540, room.twitter, 50, 1,1,1,1)
+
+            if t then
+                local banner = -4 + t
+                if banner > 0 and banner < 3.1412 then
+                    local alpha = math.pow(math.sin(banner), 2)
+                    local x = 400 - math.pow(banner / math.pi - 0.5, 5) * WIDTH * 2
+                    font:write(x, 640, "http://info-beamer.org/", 30, 1,1,1,alpha)
+                end
+            end
+        end
+    }, --]]
+}
+
+function redU(x, y, text, size)
+    red(x, y, string.upper(text), size)
+end
+
+function red(x, y, text, size)
+    font:write(x, y, text, size, 0.894, 0.251, 0.506, 1)
+end
+
+function yellowU(x, y, text, size)
+    yellow(x, y, string.upper(text), size)
+end
+
+function yellow(x, y, text, size)
+    font:write(x, y, text, size, 1.0, 0.776, 0.251, 1)
+end
+
+function blueU(x, y, text, size)
+    blue(x, y, string.upper(text), size)
+end
+
+function blue(x, y, text, size)
+    font:write(x, y, text, size, 0.251, 0.714, 0.906, 1)
+end
+
+function node.render()
+    gl.clear(0.1, 0.1, 0.1, 1)
+
+    if base_time == 0 then
+        return
+    end
+
+    util.draw_correct(logo, 20, 20, 300, 120)
+
+    yellowU(310, 20, saal, 80)
+    blueU(730, 20, clock.get(), 80)
+    redU(WIDTH-300, 20, string.format("Day %d", day), 80)
+
+    local fov = math.atan2(HEIGHT, WIDTH*2) * 360 / math.pi
+    gl.perspective(fov, WIDTH/2, HEIGHT/2, -WIDTH,
+                        WIDTH/2, HEIGHT/2, 0)
+    content.draw()
+end

ffnord-con-2015-2/room/progress.frag

@@ -0,0 +1,16 @@
+uniform sampler2D Texture;
+varying vec2 TexCoord;
+uniform float percent;
+
+void main() {
+    vec2 pos = TexCoord;
+    float angle = atan(pos.x - 0.5, pos.y - 0.5);
+    float dist = distance(pos, vec2(0.5, 0.5));
+    if (dist >= 0.5) {
+        gl_FragColor = vec4(0.0);
+    } else if (angle < percent) {
+        gl_FragColor = vec4(0.894, 0.251, 0.506, 1);
+    } else {
+        gl_FragColor = vec4(1.0, 0.776, 0.251, 1);
+    }
+}

ffnord-con-2015-2/room/schedule.json

@@ -0,0 +1,121 @@
+[
+    {
+        "duration": 60,
+        "lang": "de",
+        "place": "attraktor",
+        "speakers": [
+        ],
+        "start": "9:30",
+        "title": "„Einlass“ und Frühstück",
+        "type": "talk",
+        "unix": 1441956600,
+        "unix_end": 1441960200
+    },
+
+    {
+        "duration": 30,
+        "lang": "de",
+        "place": "attraktor",
+        "speakers": [
+        ],
+        "start": "11:00",
+        "title": "Eröffnungsplenum",
+        "type": "talk",
+        "unix": 1441962000,
+        "unix_end": 1441963800
+    },
+
+    {
+        "duration": 60,
+        "lang": "de",
+        "place": "attraktor",
+        "speakers": [
+            "t.b.a."
+        ],
+        "start": "12:00",
+        "title": "Vortrags-Slot #1 mit folgender Diskussion und Kaffeepause",
+        "type": "talk",
+        "unix": 1441965600,
+        "unix_end": 1441969200
+    },
+
+    {
+        "duration": 60,
+        "lang": "de",
+        "place": "attraktor",
+        "speakers": [
+            "t.b.a."
+        ],
+        "start": "14:00",
+        "title": "Vortrags-Slot #2 mit folgender Diskussion und Kaffeepause",
+        "type": "talk",
+        "unix": 1441972800,
+        "unix_end": 1441976400
+    },
+
+    {
+        "duration": 240,
+        "lang": "de",
+        "place": "attraktor",
+        "speakers": [
+        ],
+        "start": "16:00",
+        "title": "Workshop und Hacking Time",
+        "type": "talk",
+        "unix": 1441980000,
+        "unix_end": 1441994400
+    },
+
+    {
+        "duration": 60,
+        "lang": "de",
+        "place": "attraktor",
+        "speakers": [
+        ],
+        "start": "9:30",
+        "title": "„Einlass“ und Frühstück",
+        "type": "talk",
+        "unix": 1442043000,
+        "unix_end": 1442046600
+    },
+
+    {
+        "duration": 60,
+        "lang": "de",
+        "place": "attraktor",
+        "speakers": [
+            "t.b.a."
+        ],
+        "start": "11:00",
+        "title": "Vortrags-Slot #3 mit folgender Diskussion und Kaffeepause",
+        "type": "talk",
+        "unix": 1442048400,
+        "unix_end": 1442052000
+    },
+
+    {
+        "duration": 150,
+        "lang": "de",
+        "place": "attraktor",
+        "speakers": [
+        ],
+        "start": "13:00",
+        "title": "Workshop und Hacking Time",
+        "type": "talk",
+        "unix": 1442055600,
+        "unix_end": 1442064600
+    },
+
+    {
+        "duration": 30,
+        "lang": "de",
+        "place": "attraktor",
+        "speakers": [
+        ],
+        "start": "16:00",
+        "title": "Abschlussplenum und Diskussion",
+        "type": "talk",
+        "unix": 1442066400,
+        "unix_end": 1442068200
+    }
+]

ffnord-con-2015-2/room/service

@@ -0,0 +1,55 @@
+#!/usr/bin/python
+import sys
+import time
+import pytz
+import socket
+from calendar import timegm
+from datetime import datetime, date
+
+diff = None
+
+# Fake time in UTC
+diff = datetime(2015,9,11,8,30,00) - datetime.utcnow() 
+
+met = pytz.timezone("Europe/Berlin")
+def current_time():
+    now = datetime.utcnow()
+    if diff:
+        now += diff
+    timestamp = timegm(now.timetuple()) + now.microsecond / 1000000.
+    now = now.replace(tzinfo=pytz.utc)
+    now = now.astimezone(met)
+    now = now.replace(tzinfo=None)
+    return now, timestamp
+
+sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+
+def send(data):
+    sock.sendto(data, ('127.0.0.1', 4444))
+    print >>sys.stderr, "SENT >>> ", data
+
+def send_clock(now, ts):
+    day = (now.date() - date(2015, 9, 11)).days
+    since_midnight = (
+        now -
+        now.replace(hour=0, minute=0, second=0, microsecond=0)
+    )
+    since_midnight = since_midnight.seconds + since_midnight.microseconds / 1000000.
+
+    send('room/clock/day:%d' % day)
+    send('room/clock/set:%f' % ts)
+    send('room/clock/midnight:%f' % since_midnight)
+
+
+def main():
+    while 1:
+        now, ts = current_time()
+        if now.year < 2000:
+            print >>sys.stderr, "too soon"
+            time.sleep(1)
+            continue
+        send_clock(now, ts)
+        time.sleep(2)
+        
+if __name__ == "__main__":
+    main()

ffnord-con-2015-2/room/trichter.frag

@@ -0,0 +1,32 @@
+uniform sampler2D Texture;
+uniform sampler2D Grid;
+uniform sampler2D Overlay;
+varying vec2 TexCoord;
+uniform float time;
+
+const float segments = 9.0;
+
+float rand(vec2 co){
+    return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
+}
+
+void main() {
+    vec2 pos = TexCoord;
+
+    vec2 coord = texture2D(Texture, pos).st;
+    coord.x = mod(coord.x + time, 1.0);
+    coord.y = coord.y + 0.0175;
+    coord += rand(pos) * 0.008;
+    vec3 col = texture2D(Overlay, coord).rgb;
+
+    float foo = floor(coord.y * segments);
+    col *= (foo / segments) * 0.6 + 0.4;
+
+    if (pos.y > 0.82) {
+        vec3 bar = texture2D(Overlay, pos).rgb;
+        col = col * 0.3 + bar * 0.4; //mix(col, bar, 0.3) * 0.8;
+    }
+
+    vec4 grid = texture2D(Grid, pos);
+    gl_FragColor = vec4(col, 1.0) + grid * 0.09;
+}