62 lines
2.1 KiB
JavaScript
62 lines
2.1 KiB
JavaScript
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(function() {
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var ORBIT_RADIUS = 2.5; // distance from origin
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var ORBIT_SPEED = 0.2; // radians per second
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var SPIN_SPEED = 1.5; // radians per second
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var ORBIT_Y = 2; // height above ground
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var solids = ["tetrahedron", "cube", "octahedron", "dodecahedron", "icosahedron"];
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var count = solids.length;
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var entities = {};
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var startTime = Date.now();
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function findEntities() {
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var found = Entities.findEntities({x:0, y:0, z:0}, 200);
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solids.forEach(function(name) {
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found.forEach(function(id) {
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var props = Entities.getEntityProperties(id, ["name"]);
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if (props.name === name) {
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entities[name] = id;
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}
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});
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});
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// If we didn't find all 5, try again shortly
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if (Object.keys(entities).length < solids.length) {
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print("Only found " + Object.keys(entities).length + " solids, retrying...");
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Script.setTimeout(findEntities, 500);
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} else {
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print("Found all solids, starting update loop");
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Script.update.connect(update);
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}
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}
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// Initial delay before first attempt
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Script.setTimeout(findEntities, 500);
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function update(dt) {
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var elapsed = (Date.now() - startTime) / 1000;
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solids.forEach(function(name, i) {
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var id = entities[name];
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if (!id) return;
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// orbit angle offset per solid so they're evenly spaced
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var orbitAngle = elapsed * ORBIT_SPEED + (i / count) * 2 * Math.PI;
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var x = Math.cos(orbitAngle) * ORBIT_RADIUS;
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var z = Math.sin(orbitAngle) * ORBIT_RADIUS;
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// spin around local Y axis
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var spinAngle = elapsed * SPIN_SPEED;
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Entities.editEntity(id, {
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position: { x: x, y: ORBIT_Y, z: z },
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rotation: Quat.fromPitchYawRollRadians(spinAngle, spinAngle, -spinAngle * 0.5)
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});
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});
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}
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Script.update.connect(update);
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findEntities();
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})();
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