Basics

I would like to make the list of the basic gears and features that are missing in Drone (and to classify them). I will do this by browsing through the:

• our old wiki
• PtolemyII
• Isadora
• Quartz composer
• Puredata

Gears

OSC:

• "OscExtract" (or a better name) Takes an osc message as an input and outputs the path and arguments as a list

Frei0r:

• Make GearFrei0r work again

Math:

• Values
  • Generators
    • Random (uniform, normal, poisson, bernouilli, white noise, pink noise, etc) (cf. PtolemyII has a bunch of Random gears)
  • Unary operators
    • stateless
    • -x
    • trigonometric (sin, cos, tan, etc...)
    • exp, pow, log, sqrt, sign, etc.
    • time-based (moving):
    • moving max / min
    • moving avg (exponential)
    • moving diff (difference between current input and last)
    • accumulator (computes the sum / avg / stddev of received inputs, with a reset input to reset it)
  • Binary operators
    • • • • /
    • max / min / clamp
  • Expression
• Logic
  • Conditions: == != < <= > >=
  • Operators: ! && || XOR
• List
  • Unary operators
    • max / min / avg / stddev
  • Binary operators
    • • • • /
    • max / min / clamp
    • dotproduct
    • sum
  • Expression
• Control
  • For
  • Gate
  • Select (or switch)

Visualisation:

• Oscilloscope: converts signal into video
• FFT display: converts signal into spectrum bands / possibly two gears: fft -> array2histogram ( -> videooutput)

Time:

• Clock: current time / program time / metagear time
• Sleep: Interrupts stream for a given time upon activation

Features

• Dynamic plug in / plug out: In some cases you want to have a property that influences the number and types of plugs.
  • This is the case of (for example) the list pack/unpack gears.
  • There are issues though: for example what happens if a property removes a plug that was plugged into? (it could just remove the link, at least as a first step)
• (later) Real-time audio processing (with associated gears for sound generation and playback)
• (later) More tunable mechanism for schedulers (each gear could have a scheduler, with video/audio by default but the possibility to configure and add other schedulers easily)

Bugfixes

• The mechanism for sleeping() plugs is not 100% working
  • First of all there's a bug: sleeping(false) is not propagated instantaneuously from runVideo() (if you set a plug to sleeping(false) in runVideo whereas it was sleeping(true) before, the following gear won't execute until at the next loop)

Types

• StructType (together with associated gears) (to avoid confusion this is a "map" type in the sense of the std::map)
• (later) FunctionType (lambda-calculus)