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sound.js
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/*
* Armawebtron - A lightcycle game.
* Copyright (C) 2019 Glen Harpring
* This file was mostly written by Durf.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
var ctx = new AudioContext();
var bufferLoader = new BufferLoader(
ctx,
[
"",//0
"",//1
"",//2
"sounds/tr2n_origins/cyclrun.wav",//3
"sounds/gltron/game_engine.ogg",//4
"sounds/arma/cyclrun.wav",//5
"",//0
"",//1
"",//2
"sounds/tr2n_origins/expl.ogg",//3
"sounds/tr2n_origins/expl.ogg",//3
"sounds/tr2n_origins/expl.ogg",//3
//"sounds/gltron/game_crash.ogg",//4
//"sounds/arma/expl.ogg",//5
//other sounds:
"sounds/gltron/game_recognizer.wav",
"sounds/tr2n_origins/intro.wav",
"sounds/tr2n_origins/extro.wav",
"sounds/zone_spawn.ogg",
]
);
bufferLoader.load();
bufferLoader.other = 12;
var playSound = function(buffer, vol, pitch, loop, output)
{
var src = ctx.createBufferSource();
src.gainNode = ctx.createGain();
src.connect(src.gainNode);
src.gainNode.connect(output);
src.buffer = buffer;
src.gainNode.gain.value = vol;
src.playbackRate.value = pitch;
src.loop = loop;
src.start(ctx.currentTime);
return src;
};
function toggleSoundType() //safely changes the sound panners in settings, and players (not used anywhere)
{
if (engine.retroSound == true) { engine.retroSound = false; } else { engine.retroSound = true; }
var p = "HRTF";
if (!engine.retroSound) { p = "equalpower" }
//assume a change
for(var x=0;x<engine.players.length;x++) //for each player object
{
engine.players[x].audio.panner.panningModel = p;//change panning model
}
}
var mixCycle = function(cycle)
{
if(cycle.engineSound !== undefined)
{
cycle.engineSound.playbackRate.value = cycle.speed / settings.CYCLE_SOUND_SPEED;
}
if(!Number.isFinite(cycle.position.x) || !Number.isFinite(cycle.position.y)) return false;
if(cycle.audio)
{
cycle.audio.panner.setPosition(cycle.position.x, cycle.position.y, cycle.position.z);
}
}
var audioMixing = function()
{
try
{
var m = engine.camera.matrix;
var mx = m.elements[12], my = m.elements[13], mz = m.elements[14];
m.elements[12] = m.elements[13] = m.elements[14] = 0;
var vec = new THREE.Vector3(0,1,0);
vec.applyMatrix4(m);
vec.normalize();
var up = new THREE.Vector3(0,0,1);
up.applyMatrix4(m);
up.normalize();
ctx.listener.setOrientation(vec.x, vec.y, vec.z, up.x, up.y, up.z);
ctx.listener.setPosition(engine.camera.position.x, engine.camera.position.y, engine.camera.position.z);
m.elements[12] = mx; m.elements[13] = my; m.elements[14] = mz;
}
catch(e)
{
console.warn(e);
if(e.message.search("finite") > 0) engine.camera.position.set(engine.logicalBox.center.x*engine.REAL_ARENA_SIZE_FACTOR,engine.logicalBox.center.y*engine.REAL_ARENA_SIZE_FACTOR,0);
return false;
}
};
function changeSoundPanner(type)
{
switch(type)
{
case "EQ": case "HQ": case "equalpower":
cycle.audio.panner.panningModel = "equalpower";
break;
case "HRTF": case "LQ":
cycle.audio.panner.panningModel = "HRTF";
break;
default:
cycle.audio.panner.panningModel = "equalpower";
break;
}
}
function changeEngineSound(cycle,choice)
{
cycle.engineType = choice;
cycle.engineSound.stop();
cycle.engineSound = playSound(bufferLoader.bufferList[choice], 0.5, 1, true, cycle.audio);
}
function audioStop()
{
if(!ctx) return;
for(var x=0;x<engine.players.length;x++) if(typeof(engine.players[x]) != "undefined")
{
engine.players[x].audio.panner.disconnect();//turns off audio
}
}
function audioStart()
{
if(!ctx) return;
for(var x=0;x<engine.players.length;x++) if(typeof(engine.players[x]) != "undefined" && engine.players[x].alive)
{
engine.players[x].audio.panner.connect(ctx.destination);//turns on audio
}
}

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