summaryrefslogtreecommitdiff
path: root/public/js
diff options
context:
space:
mode:
Diffstat (limited to 'public/js')
-rw-r--r--public/js/grid.js179
1 files changed, 89 insertions, 90 deletions
diff --git a/public/js/grid.js b/public/js/grid.js
index 0a4aece..3691adf 100644
--- a/public/js/grid.js
+++ b/public/js/grid.js
@@ -7,7 +7,7 @@ var audioletReady = false;
var samples = [
'KickDrum0001.wav',
- // 'Closed Hihat0001.wav', 'Open Hihat0001.wav', 'Clap.wav'
+ 'Closed Hihat0001.wav', 'Open Hihat0001.wav', 'Clap.wav'
// 'Clav.wav', 'Mid Tom0001.wav', 'Rimshot.wav', 'SnareDrum0001.wav'
];
@@ -20,9 +20,9 @@ function Sampler (audiolet, url) {
buffer.load(url, false);
// connect the buffer to a player and set up the objects we need
- this.trigger = new TriggerControl(this.audiolet);
+ this.trigger = new TriggerControl(this.audiolet, 0);
this.player = new BufferPlayer(this.audiolet, buffer, 1, 0, 0);
- this.gain = new Gain(this.audiolet, 0.80);
+ this.gain = new Gain(this.audiolet, 0.50);
// trigger -> player -> gain -> OUTPUT
this.trigger.connect(this.player, 0, 1);
@@ -52,7 +52,7 @@ function Sequencer (audiolet, instrument) {
function trigger (note, duration) {
if (note == 1) {
- this.instrument.trigger.setValue(1);
+ base.instrument.trigger.trigger.setValue(1);
}
}
}
@@ -69,127 +69,129 @@ function AudioletApp () {
this.sequencers.push(sequencer);
}
}
-
-var Audio = new AudioletApp();
function Grid (app){
var base = this;
function setNote (data) {
- pattern[data.step][data.channel] = data.state;
+ Audio.sequencers[data.channel].pattern[data.step] = data.state;
drawNote(data.step, data.channel);
};
+
base.setBeat = function(beatId) {
beat = beatId;
};
- base.setTempo = function(tempo) {
- tick = tempo;
- }
+
base.toggle = toggle;
-
- var tog = 0;
var playing = false;
var playingInterval = false;
var tick = 125;
- var pattern = undefined;
- var channels = [];
- var channelsOn = [];
var activecoloron = 'rgb(255,255,255)';
var activecoloroff = 'rgb(202,202,202)';
var inactivecoloron = 'rgb(152,152,152)';
var inactivecoloroff = 'rgb(28,28,28)';
var gridSize = Math.floor(600/16);
var lastStep = 16;
- var channelCount = 8;
+ var channelCount = 4;
var beat = lastStep-1;
var inset = 5;
+ var Audio = new AudioletApp();
+
var canvas = document.getElementById('canvas'); //.offset();
var ctx = canvas.getContext('2d');
init();
function init(){
bind();
- load();
+ makeGrid();
}
+ // Bind events
function bind(){
+
+ // Server events
app.receive("event-grid", loadGrid);
app.receive("event-note", setNote);
+ // UI events
$('#start').click(start);
$('#stop').click(stop);
$('#tempo').change(function() {
- resetTempo( document.getElementById('tempo').value )
+ setTempo( $('#tempo').val() )
});
- $('#canvas').click(function(e){
- var x = e.pageX-canvas.offsetLeft-10;
- var y = e.pageY-canvas.offsetTop-10;
+
+ // Clicking the canvas
+ $('#canvas').click(canvasClick);
+ }
+
+ // Click a square on the canvas to toggle it.
+ function canvasClick (e){
+ var x = e.pageX-canvas.offsetLeft-10;
+ var y = e.pageY-canvas.offsetTop-10;
- x = Math.floor(x / gridSize);
- y = Math.floor(y / gridSize);
+ var step = Math.floor(x / gridSize);
+ var channel = Math.floor(y / gridSize);
- toggleNote(x, y);
-
- app.send("event-note", {
- 'step': x,
- 'channel': y,
- 'state': pattern[x][y]
- });
- });
+ toggleNote(channel, step);
+
+ // Let the other clients know the new state
+ app.send("event-note", {
+ 'step': step,
+ 'channel': channel,
+ 'state': Audio.sequencers[channel].pattern[step]
+ });
}
+ // Load the pattern from the server
function loadGrid(data){
- pattern = data.pattern;
+
+ for (var channel = 0; channel < channelCount; channel++) {
+ for (var step = 0; step < lastStep; step++) {
+ Audio.sequencers[channel].pattern[step] = data.pattern[channel][step];
+ }
+ }
+
tempo = data.tempo;
stop();
start();
}
- function load(){
- if (playing) {
- playingInterval = setInterval(make, tick);
- }
- makeGrid();
- }
-
+ // Toggle on/off
function toggle(){
playing ? stop() : start();
}
+ // Start playing
function start() {
reset();
playing = true;
- load();
+ makeGrid();
document.body.bgColor = "#000000";
- for (var i = 0; i < channelCount; i++) {
- channels[i] = document.getElementById('sound' + i);
- channelsOn[i] = false;
- }
- for (var i = 0; i < channelCount; i++) {
- channels[i+8] = document.getElementById('sound' + i + 'a');
- }
+ playingInterval = setInterval(make, tick);
}
+
+ // Stop playing
function stop() {
+ reset();
playing = false;
document.body.bgColor = "#444444";
- for (var i = 0; i < channelCount; i++) {
- document.getElementById('sound' + i).pause();
- document.getElementById('sound' + i + 'a').pause();
- }
- reset();
}
+
+ // Clear the canvas, reset everything to zero, stop the event loop
function reset() {
clearInterval(playingInterval);
ctx.clearRect(0,0, canvas.width, canvas.height);
beat = lastStep-1;
}
- function resetTempo(tempo) {
+
+ // Change the tempo
+ function setTempo(tempo) {
if (tempo <= 1 || tempo >= 800) {
tempo = 120;
}
- tick = (1000 / (tempo / 60))/4;
+ tick = (1000 / (tempo / 60)) / 4;
$("#alertDisp").html( "Set tempo to " + tempo );
if (playing) {
clearInterval(playingInterval);
@@ -197,77 +199,74 @@ function Grid (app){
}
}
+ // Paint the current step that's playing, and reset the previous stamp
+ // This is the old event loop
function make() {
beat += 1;
if (beat == lastStep) {
- makeColumn(beat-1,activecoloroff,inactivecoloroff,false);
+ makeColumn(beat-1, activecoloroff, inactivecoloroff, false);
+ makeColumn(0, activecoloron, inactivecoloron, true);
beat = 0;
- makeColumn(beat,activecoloron,inactivecoloron,true);
}
else {
- makeColumn(beat,activecoloron,inactivecoloron,true);
- makeColumn(beat-1,activecoloroff,inactivecoloroff,false);
+ makeColumn(beat, activecoloron, inactivecoloron, true);
+ makeColumn(beat-1, activecoloroff, inactivecoloroff, false);
}
}
- function makeColumn(x,active,inactive,goplaysample) {
- for (var y = 0; y < channelCount; y += 1) {
- if (pattern[x][y] == 1) {
- if (goplaysample === true) {
- // ctx.fillStyle = active;
+
+ // Paint the rectangles in a column, if any of them are playing.
+ function makeColumn(step, active, inactive, playing) {
+ for (var channel = 0; channel < channelCount; channel += 1) {
+ if (Audio.sequencers[channel].pattern[step] == 1) {
+ if (playing === true) {
ctx.fillStyle = random_color();
- var tmpAudio;
- if (channelsOn[y] == true) {
- channelsOn[y] = false;
- tmpAudio = channels[y+8];
- }
- else {
- tmpAudio = channels[y];
- }
- tmpAudio.currentTime = 0;
- if (tmpAudio.paused)
- tmpAudio.play();
}
else {
ctx.fillStyle = active;
}
- ctx.fillRect((x*gridSize) + inset, (y*gridSize) + inset, gridSize - 2*inset, gridSize - 2*inset);
- }
- else {
- ctx.fillStyle = inactive;
+ ctx.fillRect( (step*gridSize) + inset, (channel*gridSize) + inset,
+ gridSize - 2*inset, gridSize - 2*inset );
}
}
}
+
+ // Paint all the squares on the grid
function makeGrid() {
- for (var x = 0; x < lastStep; x += 1) {
- for (var y = 0; y < channelCount; y += 1) {
- if (pattern && pattern[x][y] == 1) {
+ for (var step = 0; step < lastStep; step += 1) {
+ for (var channel = 0; channel < channelCount; channel += 1) {
+ if (Audio.sequencers[channel].pattern[step] == 1) {
ctx.fillStyle = activecoloroff;
}
else {
ctx.fillStyle = inactivecoloroff;
}
- ctx.fillRect((x*gridSize) + inset, (y*gridSize) + inset, gridSize - 2*inset, gridSize - 2*inset);
+ ctx.fillRect((step*gridSize) + inset, (channel*gridSize) + inset, gridSize - 2*inset, gridSize - 2*inset);
}
}
}
- function drawNote(x,y) {
- if (pattern[x][y] == 1) {
+
+ // Repaint a square to toggle it
+ function drawNote(channel, step) {
+ if (Audio.sequencers[channel].pattern[step] == 1) {
ctx.fillStyle = activecoloroff;
} else {
ctx.fillStyle = inactivecoloroff;
}
- ctx.fillRect((x*gridSize) + inset, (y*gridSize) + inset, gridSize - 2*inset, gridSize - 2*inset);
+ ctx.fillRect((step*gridSize) + inset, (channel*gridSize) + inset, gridSize - 2*inset, gridSize - 2*inset);
}
- function toggleNote(x,y) {
- if (pattern[x][y] == 1) {
- pattern[x][y] = 0;
+
+ // Actually toggle a note, and then redraw it
+ function toggleNote(channel, step) {
+ if (Audio.sequencers[channel].pattern[step] == 1) {
+ Audio.sequencers[channel].pattern[step] = 0;
}
else {
- pattern[x][y] = 1;
+ Audio.sequencers[channel].pattern[step] = 1;
}
- drawNote(x,y);
+ drawNote(channel, step);
}
+ // Generate a random color
function random_color() {
var rint = Math.round(0xffffff * Math.random());
return 'rgb(' + (rint >> 16) + ',' + (rint >> 8 & 255) + ',' + (rint & 255) + ')';
generated by cgit v1.2.3-70-g09d2 (git 2.51.0) at 2025-12-10 16:35:36 +0000