(
~modes = [
	[ "saw", \pos_saw ],
	[ "reverse", \pos_reverse ],
	[ "sine", \pos_sine ]
];

~outputDir = Platform.recordingsDir +/+ "GrainBuffers";


~grainsb = Bus.audio(s, 2);

~granulators = Array.new(4);
~grainmodes = [ 0, 0, 0, 0 ]; // keep track of mode so don't swap if not needed
~posb = Array.new(4);
~rectriggerb = Array.new(4);
~patterns = Array.new(4);
~players = Array.new(4);
~loopsynths = Array.new(4);

// create the control busses

(0..3).do({
	~posb.add(Bus.control(s, 1));
	~rectriggerb.add(Bus.control(s, 1));
});

// start the granulators

(0..3).do({ |i|
	var pb = ~posb[i], rtb = ~rectriggerb[i];
	~granulators.add(Granulator.new(~buflen, ~infxb, ~grainsb, pb, rtb));
});

// set up the Patterns which drive the position synths

(0..3).do({ |i|
	~patterns.add(~makePattern.value(i, 0));
});

// play the four patterns
// to-do - will these need separate tempoclocks?

(0..3).do({|i|
	~players.add(~patterns[i].play(~tc, quant: ~beatsperbar))
});

~setmode = {
	arg track, mode;
	if( ~grainmodes[track] != mode, {
		~grainmodes[track] = mode;
		~players[track].stop;
		~patterns[track].free;
		~patterns[track] = ~makePattern.value(track, mode);
		~players[track] = ~patterns[track].play(~tc, quant: ~beatsperbar);
	});
};

~makePattern = {
	arg track, mode;
	var ptrig, ppos, synth = ~modes[mode][1];
	[ "makePattern", ~track, ~buflen ].postln;
	ptrig = Pbind(
		\instrument, \trigger,
		\dur, ~beatsperbar,
		\out, ~rectriggerb[track]
	);
	ppos = Pbind(
		\instrument, synth,
		\dur, ~beatsperbar,
		\length, ~buflen,
		\out, ~posb[track]
	);
	Ppar([ptrig, ppos]);
};


~dumpbuffers = { |prefix|
	(0..3).do({|i|
		var filename = ~outputDir +/+ prefix ++ 'buffer' ++ i.asString ++ '.aiff';
		~granulators[i].buffer.write(filename);
	});
}
)