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Set raindrops spinning

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This commit is contained in:
David Rowe 2015-04-09 19:38:15 -07:00
parent 54c0aeaa03
commit d057573825
1 changed files with 38 additions and 14 deletions
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52
examples/acScripts/rain.js
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@ -17,6 +17,7 @@ var RainSquall = function (properties) {
dropSize = { x: 0.1, y: 0.1, z: 0.1 },
dropFallSpeed = 1, // m/s
dropLifetime = 60, // Seconds
dropSpinMax = 0, // Maximum angular velocity per axis; deg/s
debug = false, // Display origin circle; don't use running on Stack Manager
// Other
squallCircle,
@ -26,7 +27,9 @@ var RainSquall = function (properties) {
raindropProperties,
RAINDROP_MODEL_URL = "https://s3.amazonaws.com/hifi-public/ozan/Polyworld/Sets/sky/tetrahedron_v1-Faceted2.fbx",
raindropTimer,
rainDrops = [];
raindrops = [], // HACK: Work around raindrops not always getting velocities
raindropVelocities = [], // HACK: Work around raindrops not always getting velocities
DEGREES_TO_RADIANS = Math.PI / 180;
function processProperties() {
if (!properties.hasOwnProperty("origin")) {
@ -57,6 +60,10 @@ var RainSquall = function (properties) {
dropLifetime = properties.dropLifetime;
}
if (properties.hasOwnProperty("dropSpinMax")) {
dropSpinMax = properties.dropSpinMax;
}
if (properties.hasOwnProperty("debug")) {
debug = properties.debug;
}
@ -68,6 +75,7 @@ var RainSquall = function (properties) {
dimensions: dropSize,
velocity: { x: 0, y: -dropFallSpeed, z: 0 },
damping: 0,
angularDamping: 0,
ignoreForCollisions: true
};
}
@ -77,23 +85,38 @@ var RainSquall = function (properties) {
radius,
offset,
drop,
spin = { x: 0, y: 0, z: 0 },
maxSpinRadians = properties.dropSpinMax * DEGREES_TO_RADIANS,
i;
// HACK: Work around rain drops not always getting velocity set at creation
for (i = 0; i < rainDrops.length; i += 1) {
Entities.editEntity(rainDrops[i], { velocity: raindropProperties.velocity });
// HACK: Work around rain drops not always getting velocities set at creation
for (i = 0; i < raindrops.length; i += 1) {
Entities.editEntity(raindrops[i], raindropVelocities[i]);
}
angle = Math.random() * 360;
radius = Math.random() * squallRadius;
offset = Vec3.multiplyQbyV(Quat.fromPitchYawRollDegrees(0, angle, 0), { x: 0, y: -0.1, z: radius });
raindropProperties.position = Vec3.sum(squallOrigin, offset);
if (properties.dropSpinMax > 0) {
spin = {
x: Math.random() * maxSpinRadians,
y: Math.random() * maxSpinRadians,
z: Math.random() * maxSpinRadians
};
raindropProperties.angularVelocity = spin;
}
drop = Entities.addEntity(raindropProperties);
// HACK: Work around rain drops not always getting velocity set at creation
rainDrops.push(drop);
if (rainDrops.length > 5) {
drop = rainDrops.shift();
// HACK: Work around rain drops not always getting velocities set at creation
raindrops.push(drop);
raindropVelocities.push({
velocity: raindropProperties.velocity,
angularVelocity: spin
});
if (raindrops.length > 5) {
raindrops.shift();
raindropVelocities.shift();
}
}
@ -129,11 +152,12 @@ var RainSquall = function (properties) {
};
var rainSquall1 = new RainSquall({
origin: { x: 8192, y: 8200, z: 8192 },
radius: 2.5,
origin: { x: 1195, y: 1223, z: 1020 },
radius: 25,
dropsPerMinute: 120,
dropSize: { x: 0.1, y: 0.1, z: 0.1 },
dropFallSpeed: 2, // m/s
dropLifetime: 10,
debug: true
});
dropFallSpeed: 3,
dropLifetime: 30,
dropSpinMax: 180,
debug: false
});