TITLE:: FluidDataSetWr
summary:: Write to FluidDataSet on the server
categories:: FluidManipulation
related:: Classes/FLuidDataSet

DESCRIPTION::
A UGen that adds labelled points to a link::Classes/FluidDataSet:: Internally, this calls code::setPoint::, so IDs that already exist will be overwritten, and new IDs will be added. The actual work is done on the server's command queue, rather than the real-thread. 

By default the object generates a numerical index that gets used for the point labels. This index starts counting from link::#offset#labelOffset:: and increments each time the Ugen is re-triggered with a zero to non-zero transition. The label is then concatenated with the code::idPrefix:: symbol, which is fixed at instantiation. In this way, one can make custom, incrementing labels, e.g.

code::
FluidDataSetWr.kr(~somedataset,"my_data",0,~somebuffer,trig)
::

would add points like code::my_data0, mydata1, mydata2...:: if successively retriggered.

Alternatively, for one shot use you may not want a numerical suffix at all. Setting code::idNumber:: to code:: nil:: will bypass this and use only the code::idPrefix:: string.

CLASSMETHODS::

private:: *new1

METHOD:: kr
The equivalent of calling link::Classes/FluidDataSet#-addPoint::, but within a link::Classes/Synth::

ARGUMENT:: dataset
An instance of link::Classes/FluidDataSet:: or an instance's name.

ARGUMENT:: idPrefix
A string or symbol with a prefix for generated labels

ARGUMENT:: idNumber
ANCHOR::offset::
An integer with the offset to start labeling from. If the UGen is run in a server-side loop (i.e. repeatedly re-triggered), the generated labels will count upwards from this offset. If < 0, then no numerical index will be applied to the generated label (i.e. only the labelPrefix is used).

ARGUMENT:: buf
The link::Classes/Buffer:: containing the data point.

ARGUMENT:: trig

A kr trigger signal

ARGUMENT:: blocking

If 0 then the job will run in its own thread (not reccomended for this object)

EXAMPLES::

code::
s.reboot;
(
~ds = FluidDataSet(s);
)

//Write a 100 points whose values increase
(
~ds.clear;
OSCFunc({
    "FluidDataSetWr help: all points written".postln;
    ~ds.print
},'/datasetwrdone').oneShot;

{  |n|
	var b = LocalBuf.newFrom([0,1,2,3]);
    var trig = Impulse.kr(ControlRate.ir / 2);
    var idx = Stepper.kr(trig,min:0,max:n);
    4.collect{|i| BufWr.kr([(4 * idx) + i],b,i)};
    FluidDataSetWr.kr(~ds,idNumber:idx,buf:b,trig:trig);
    SendReply.kr(idx >= n, '/datasetwrdone');
    FreeSelf.kr(idx >= n);

}.play(s,args:[n:100]);
)

::