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Merge pull request from PhilipRosedale/master

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Birds will die if abandoned, ability to fly with birds
This commit is contained in:
Brad Davis 2015-07-22 14:13:27 -04:00
commit 3407fd48a8
1 changed files with 35 additions and 8 deletions

43
examples/FlockOfbirds.js
View file

@ -10,15 +10,16 @@
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
// The area over which the birds will fly
var lowerCorner = { x: 1, y: 1, z: 1 };
var upperCorner = { x: 10, y: 10, z: 10 };
// The rectangular area in the domain where the flock will fly
var lowerCorner = { x: 0, y: 0, z: 0 };
var upperCorner = { x: 10, y: 10, z: 10 };
var STARTING_FRACTION = 0.25;
var NUM_BIRDS = 50;
var UPDATE_INTERVAL = 0.016;
var playSounds = true;
var SOUND_PROBABILITY = 0.001;
var STARTING_LIFETIME = (1.0 / SOUND_PROBABILITY) * UPDATE_INTERVAL * 10;
var numPlaying = 0;
var BIRD_SIZE = 0.08;
var BIRD_MASTER_VOLUME = 0.1;
@ -35,6 +36,10 @@ var ALIGNMENT_FORCE = 1.5;
var COHESION_FORCE = 1.0;
var MAX_COHESION_VELOCITY = 0.5;
var followBirds = true;
var AVATAR_FOLLOW_RATE = 0.001;
var AVATAR_FOLLOW_VELOCITY_TIMESCALE = 2.0;
var AVATAR_FOLLOW_ORIENTATION_RATE = 0.005;
var floor = false;
var MAKE_FLOOR = false;
@ -43,6 +48,9 @@ var averagePosition = { x: 0, y: 0, z: 0 };
var birdsLoaded = false;
var oldAvatarOrientation;
var oldAvatarPosition;
var birds = [];
var playing = [];
@ -115,8 +123,9 @@ function updateBirds(deltaTime) {
birds[i].audioId = Audio.playSound(birds[i].sound, options);
}
numPlaying++;
// Change size
Entities.editEntity(birds[i].entityId, { dimensions: Vec3.multiply(1.5, properties.dimensions)});
// Change size, and update lifetime to keep bird alive
Entities.editEntity(birds[i].entityId, { dimensions: Vec3.multiply(1.5, properties.dimensions),
lifetime: properties.ageInSeconds + STARTING_LIFETIME});
} else if (birds[i].audioId) {
// If bird is playing a chirp
@ -166,10 +175,24 @@ function updateBirds(deltaTime) {
if (birdVelocitiesCounted > 0) {
averageVelocity = Vec3.multiply(1.0 / birdVelocitiesCounted, sumVelocity);
//print(Vec3.length(averageVelocity));
if (followBirds) {
MyAvatar.motorVelocity = averageVelocity;
MyAvatar.motorTimescale = AVATAR_FOLLOW_VELOCITY_TIMESCALE;
var polarAngles = Vec3.toPolar(Vec3.normalize(averageVelocity));
if (!isNaN(polarAngles.x) && !isNaN(polarAngles.y)) {
var birdDirection = Quat.fromPitchYawRollRadians(polarAngles.x, polarAngles.y + Math.PI, polarAngles.z);
MyAvatar.orientation = Quat.mix(MyAvatar.orientation, birdDirection, AVATAR_FOLLOW_ORIENTATION_RATE);
}
}
}
if (birdPositionsCounted > 0) {
averagePosition = Vec3.multiply(1.0 / birdPositionsCounted, sumPosition);
// If Following birds, update position
if (followBirds) {
MyAvatar.position = Vec3.sum(Vec3.multiply(AVATAR_FOLLOW_RATE, MyAvatar.position), Vec3.multiply(1.0 - AVATAR_FOLLOW_RATE, averagePosition));
}
}
}
// Connect a call back that happens every frame
@ -183,11 +206,14 @@ Script.scriptEnding.connect(function() {
if (floor) {
Entities.deleteEntity(floor);
}
MyAvatar.orientation = oldAvatarOrientation;
MyAvatar.position = oldAvatarPosition;
});
function loadBirds(howMany) {
while (!Entities.serversExist() || !Entities.canRez()) {
}
oldAvatarOrientation = MyAvatar.orientation;
oldAvatarPosition = MyAvatar.position;
var sound_filenames = ["bushtit_1.raw", "bushtit_2.raw", "bushtit_3.raw"];
/* Here are more sounds/species you can use
, "mexicanWhipoorwill.raw",
@ -247,6 +273,7 @@ function loadBirds(howMany) {
velocity: { x: 0, y: -0.1, z: 0 },
linearDamping: LINEAR_DAMPING,
collisionsWillMove: true,
lifetime: STARTING_LIFETIME,
color: colors[whichBird]
}),
audioId: false,