Smoothslider

gistfile1.js

// ----------------- BEGIN SmoothSlider functions -----------------
SmoothSlider = function() {}
SmoothSlider.Step = 0.7;
SmoothSlider.Steps = 127;

SmoothSlider.generateTable = function(mrange, step)
{
	var sliderTable = new Array();
	var range = Math.round(mrange * 100);
	if (( range % 10 ) && (range != 8))
		range += ( range - (range % 10 ));
	
	print("GENERATING TABLE FOR: " + range + " => " + step);
	
	SmoothSlider.Range = range;

	// Clear Table with NaN's
	for (var i = 0; i <= SmoothSlider.Steps; i++)
		sliderTable[i] = NaN;
	
	
	var stepings = (range / step).toFixed(0);
	var pos = ((SmoothSlider.Steps-1)/2-1);
	var left = pos % stepings;
	var steps = (pos / stepings).toFixed(0);
	
	
	if ( steps <= 0 ) {
		//print('Not Enough MIDI Steps...');
		return;
	}
	else {
		//print("Steps = " + SmoothSlider.Steps + " stepings = " + steps + " steps=" + steps + " left=" + left);
	}
	
	for (var i = 0; i <= SmoothSlider.Steps; i++) {
		var q = (i - pos - 1);
		var perc;
		
		
		if ( Math.abs(q) < (left/2)) {
			perc = 0;
		}
		else {
			if ( q > 0)
				q = q - (left/2);
			else
				q = q + (left/2);
			
			perc = (q * (step / steps))
		}
		
		if ( perc < -range )
			perc = -range;
		else if ( perc > range )
			perc = range;
		
		sliderTable[i] = perc;
	}
	
	return sliderTable;
}

SmoothSlider.init = function(id)
{
}

SmoothSlider.generate = function()
{
	SmoothSlider.Decks = new Array();
	
	var decks = engine.getValue("[Master]", "num_decks");
	for (var deck = 0; deck < decks; deck++) {
		
		var initDeck = function(deck) {
			var channel = "[Channel"+(deck+1)+"]";
			var rateRange = engine.getValue(channel, "rateRange");
			var bpm = engine.getValue(channel, "bpm");
			var step = SmoothSlider.Step
			if ( bpm ) {
				step = Math.round((100 / bpm)*20)/20;
			}
		
			SmoothSlider.Decks[deck] = {
				table: SmoothSlider.generateTable(rateRange, step),
				step: step,
				range: rateRange
			};
		
			var refresh = function() {
				SmoothSlider.Decks[deck].table = 
						SmoothSlider.generateTable(
							SmoothSlider.Decks[deck].range, 
							SmoothSlider.Decks[deck].step
						);
			};
		
			engine.connectControl(channel,"rateRange", function(rateRange) {
				SmoothSlider.Decks[deck].range = rateRange;
				refresh();
			});
		
			engine.connectControl(channel, "file_bpm", function(bpm) {
				print("BPM CHANGE=" + bpm + " CHANNEL=" + channel + " DECK=" +deck);
				if (bpm) {
					SmoothSlider.Decks[deck].step = Math.round((100 / bpm)*20)/20;;
					refresh();
				}
			});
		};
		
		initDeck(deck);
	}
	
}

SmoothSlider.shutdown = function()
{
}

SmoothSlider.pitchShift = function(channel, control, value, status, group)
{
	var m = group.match(/\[Channel(\d+)\]/);
	if (!m) {
		print("Group is not a channel: " + group);
	}
	
	var deck = parseInt(m[1])-1;
	var pitch = SmoothSlider.Decks[deck].table[value];
	var rate = 0;
	
	//print("VALUE=" + value + " GROUP=" + group + " DECK=" + deck + " PITCH=" + pitch + " RANGE=" + SmoothSlider.Decks[deck].range);
	
	if ( isNaN(pitch)) {
		print("USING DEFAULT VALUE FOR SMOOTH SLIDER !#@");
		rate = script.absoluteSlider(group, "rate", value, -2, 1);
	}
	else {
		rate = pitch / (SmoothSlider.Decks[deck].range*100);
		
		print("Value[" + value + "] = " +  pitch + " / " + rate);
		engine.setValue(group, "rate", rate);
	}
}