content/hifi-public/scripts/clap.js

//
//  clap.js
//  examples
//
//  Copyright 2014 High Fidelity, Inc.
//
//  This sample script watches your hydra hands and makes clapping sound when they come close together fast, 
//  and also watches for the 'shift' key and claps when that key is pressed.  Clapping multiple times by pressing 
//  the shift key again makes the animation and sound match your pace of clapping. 
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

HIFI_PUBLIC_BUCKET = "http://s3.amazonaws.com/hifi-public/";

var clapAnimation = HIFI_PUBLIC_BUCKET + "animations/ClapAnimations/ClapHands_Standing.fbx";
var ANIMATION_FRAMES_PER_CLAP = 10.0;
var startEndFrames = [];
startEndFrames.push({ start: 0, end: 10});
startEndFrames.push({ start: 10, end: 20});
startEndFrames.push({ start: 20, end: 30});
startEndFrames.push({ start: 30, end: 40});
startEndFrames.push({ start: 41, end: 51});
startEndFrames.push({ start: 53, end: 0});

var lastClapFrame = 0;
var lastAnimFrame = 0;

var claps = [];
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap1Rvb.wav"));
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap2Rvb.wav"));
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap3Rvb.wav"));
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap4Rvb.wav"));
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap5Rvb.wav"));
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap6Rvb.wav"));
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap7Rvb.wav"));
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap8Rvb.wav"));
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap9Rvb.wav"));
claps.push(SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/claps/BClap10Rvb.wav"));
var numberOfSounds = claps.length;

var clappingNow = false;
var collectedClicks = 0;

var clickStartTime, clickEndTime;
var clickClappingNow = false; 
var CLAP_START_RATE = 15.0;
var clapRate = CLAP_START_RATE; 
var startedTimer = false; 

function maybePlaySound(deltaTime) {
    //  Set the location and other info for the sound to play

    var animationDetails = MyAvatar.getAnimationDetails(clapAnimation);

    var frame = Math.floor(animationDetails.frameIndex);

    if (frame != lastAnimFrame) {
        lastAnimFrame = frame;
    }

    for (var i = 0; i < startEndFrames.length; i++) {
        if (frame == startEndFrames[i].start && (frame != lastClapFrame)) {
            playClap(1.0, Camera.getPosition());
            lastClapFrame = frame; 
        }
    }

    var palm1Position = MyAvatar.getLeftPalmPosition();
    var palm2Position = MyAvatar.getRightPalmPosition();
    var distanceBetween = Vec3.length(Vec3.subtract(palm1Position, palm2Position));

    var palm1Velocity = Controller.getPoseValue(Controller.Standard.LeftHand).velocity;
    var palm2Velocity = Controller.getPoseValue(Controller.Standard.RightHand).velocity;
    var closingVelocity = Vec3.length(Vec3.subtract(palm1Velocity, palm2Velocity));

    const CLAP_SPEED = 0.7;
    const CLAP_DISTANCE = 0.15; 

    if ((closingVelocity > CLAP_SPEED) && (distanceBetween < CLAP_DISTANCE) && !clappingNow) {
        var volume = closingVelocity / 2.0;
        if (volume > 1.0) volume = 1.0;
        playClap(volume, palm1Position);
        clappingNow = true; 
    } else if (clappingNow && (distanceBetween > CLAP_DISTANCE * 1.2)) {
        clappingNow = false;
    }
}

function playClap(volume, position) {
    var clip = Math.floor(Math.random() * numberOfSounds);
    Audio.playSound(claps[clip], {
      position: position,
    volume: volume
    });
}

var FASTEST_CLAP_INTERVAL = 150.0;
var SLOWEST_CLAP_INTERVAL = 750.0;

Controller.keyPressEvent.connect(function(event) {
    if(event.text == "SHIFT") {
        if (!clickClappingNow) {
            clickClappingNow = true;
            clickStartTime = new Date();
            lastClapFrame = 0;
        } else {
            //  start or adjust clapping speed based on the duration between clicks
            clickEndTime = new Date();
            var milliseconds = Math.max(clickEndTime - clickStartTime, FASTEST_CLAP_INTERVAL);
            clickStartTime = new Date();
            if (milliseconds < SLOWEST_CLAP_INTERVAL) {
                clapRate = ANIMATION_FRAMES_PER_CLAP * (1000.0 / milliseconds);
                playClap(1.0, Camera.getPosition());
                MyAvatar.stopAnimation(clapAnimation);
                MyAvatar.startAnimation(clapAnimation, clapRate, 1.0, true, false);
            }
            collectedClicks = collectedClicks + 1;
        }
    }
});

var CLAP_END_WAIT_MSECS = 300;
Controller.keyReleaseEvent.connect(function(event) {
    if (event.text == "SHIFT") {
        collectedClicks = 0;
        if (!startedTimer) {
            collectedClicks = 0;
            Script.setTimeout(stopClapping, CLAP_END_WAIT_MSECS);
            startedTimer = true;
        }
    }
});

function stopClapping() {
    if (collectedClicks == 0) {
        startedTimer = false;
           MyAvatar.stopAnimation(clapAnimation);
           clapRate = CLAP_START_RATE;
           clickClappingNow = false;
    }  else {
        startedTimer = false;
    } 
}

// Connect a call back that happens every frame
Script.update.connect(maybePlaySound);