0d14e5a379
Needs a lot of cleanup. Data has been de-duplicated, and where identical copies existed, one of them has been replaced with a symlink. Some files have been excluded, such as binaries, installers and debug dumps. Some of that may still be present.
83 lines
No EOL
2.5 KiB
JavaScript
83 lines
No EOL
2.5 KiB
JavaScript
//
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// drumStick.js
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// examples
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//
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// Copyright 2014 High Fidelity, Inc.
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//
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// This example musical instrument script plays 'air drums' when you move your hands downward
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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Script.include("libraries/globals.js");
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function length(v) {
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return Math.sqrt(v.x * v.x + v.y * v.y + v.z * v.z);
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}
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function printVector(v) {
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print(v.x + ", " + v.y + ", " + v.z + "\n");
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}
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function vMinus(a, b) {
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var rval = { x: a.x - b.x, y: a.y - b.y, z: a.z - b.z };
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return rval;
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}
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// First, load two percussion sounds to be used on the sticks
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var drum1 = SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/Drums/RackTomHi.raw");
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var drum2 = SoundCache.getSound(HIFI_PUBLIC_BUCKET + "sounds/Drums/RackTomLo.raw");
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// State Machine:
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// 0 = not triggered
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// 1 = triggered, waiting to stop to play sound
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var state = new Array();
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state[0] = 0;
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state[1] = 0;
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var strokeSpeed = new Array();
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strokeSpeed[0] = 0.0;
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strokeSpeed[1] = 0.0;
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function checkSticks(deltaTime) {
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for (var palm = 0; palm < 2; palm++) {
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var palmVelocity = Controller.getSpatialControlVelocity(palm * 2 + 1);
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var speed = length(palmVelocity);
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const TRIGGER_SPEED = 0.30; // Lower this value to let you 'drum' more gently
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const STOP_SPEED = 0.01; // Speed below which a sound will trigger
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const GAIN = 0.5; // Loudness compared to stick velocity
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const AVERAGING = 0.2; // How far back to sample trailing velocity
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// Measure trailing average stroke speed to ultimately set volume
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strokeSpeed[palm] = (1.0 - AVERAGING) * strokeSpeed[palm] + AVERAGING * (speed * GAIN);
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if (state[palm] == 0) {
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// Waiting for downward speed to indicate stroke
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if ((palmVelocity.y < 0.0) && (strokeSpeed[palm] > TRIGGER_SPEED)) {
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state[palm] = 1;
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}
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} else if (state[palm] == 1) {
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// Waiting for change in velocity direction or slowing to trigger drum sound
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if ((palmVelocity.y > 0.0) || (speed < STOP_SPEED)) {
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state[palm] = 0;
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var options = { position: Controller.getSpatialControlPosition(palm * 2 + 1) };
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if (strokeSpeed[palm] > 1.0) { strokeSpeed[palm] = 1.0; }
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options.volume = strokeSpeed[palm];
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if (palm == 0) {
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Audio.playSound(drum1, options);
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} else {
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Audio.playSound(drum2, options);
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}
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}
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}
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}
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}
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// Connect a call back that happens every frame
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Script.update.connect(checkSticks); |