434 lines
14 KiB
HTML
434 lines
14 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport"
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content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
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<meta name="description" content="Particle systems.">
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<meta name="cesium-sandcastle-labels" content="Beginner, Showcases">
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<title>Cesium Demo</title>
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<script type="text/javascript" src="../Sandcastle-header.js"></script>
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<script type="text/javascript" src="../../../ThirdParty/requirejs-2.1.20/require.js"></script>
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<script type="text/javascript">
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require.config({
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baseUrl : '../../../Source',
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waitSeconds : 60
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});
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</script>
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</head>
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<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
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<style>
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@import url(../templates/bucket.css);
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#toolbar {
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background: rgba(42, 42, 42, 0.8);
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padding: 4px;
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border-radius: 4px;
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}
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#toolbar input {
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vertical-align: middle;
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padding-top: 2px;
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padding-bottom: 2px;
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}
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#toolbar .header {
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font-weight: bold;
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}
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</style>
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<div id="cesiumContainer" class="fullSize"></div>
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<div id="loadingOverlay"><h1>Loading...</h1></div>
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<div id="toolbar">
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<table>
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<tbody>
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<tr>
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<td>Rate</td>
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<td>
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<input type="range" min="0.0" max="100.0" step="1" data-bind="value: emissionRate, valueUpdate: 'input'">
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<input type="text" size="5" data-bind="value: emissionRate">
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</td>
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</tr>
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<tr>
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<td>Size</td>
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<td>
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<input type="range" min="2" max="60.0" step="1" data-bind="value: particleSize, valueUpdate: 'input'">
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<input type="text" size="5" data-bind="value: particleSize">
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</td>
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</tr>
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<tr>
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<td>Min Life</td>
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<td>
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<input type="range" min="0.1" max="30.0" step="1" data-bind="value: minimumParticleLife, valueUpdate: 'input'">
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<input type="text" size="5" data-bind="value: minimumParticleLife">
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</td>
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</tr>
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<tr>
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<td>Max Life</td>
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<td>
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<input type="range" min="0.1" max="30.0" step="1" data-bind="value: maximumParticleLife, valueUpdate: 'input'">
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<input type="text" size="5" data-bind="value: maximumParticleLife">
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</td>
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</tr>
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<tr>
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<td>Min Speed</td>
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<td>
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<input type="range" min="0.0" max="30.0" step="1" data-bind="value: minimumSpeed, valueUpdate: 'input'">
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<input type="text" size="5" data-bind="value: minimumSpeed">
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</td>
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</tr>
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<tr>
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<td>Max Speed</td>
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<td>
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<input type="range" min="0.0" max="30.0" step="1" data-bind="value: maximumSpeed, valueUpdate: 'input'">
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<input type="text" size="5" data-bind="value: maximumSpeed">
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</td>
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</tr>
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<tr>
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<td>Start Scale</td>
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<td>
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<input type="range" min="0.0" max="10.0" step="1" data-bind="value: startScale, valueUpdate: 'input'">
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<input type="text" size="5" data-bind="value: startScale">
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</td>
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</tr>
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<tr>
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<td>End Scale</td>
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<td>
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<input type="range" min="0.0" max="10.0" step="1" data-bind="value: endScale, valueUpdate: 'input'">
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<input type="text" size="5" data-bind="value: endScale">
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</td>
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</tr>
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<tr>
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<td>Gravity</td>
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<td>
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<input type="range" min="-20.0" max="20.0" step="1" data-bind="value: gravity, valueUpdate: 'input'">
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<input type="text" size="5" data-bind="value: gravity">
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</td>
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</tr>
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<tr>
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<td>Translation</td>
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<td>
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X <input type="text" size="5" data-bind="value: transX">
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Y <input type="text" size="5" data-bind="value: transY">
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Z <input type="text" size="5" data-bind="value: transZ">
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</td>
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</tr>
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<tr>
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<td>Rotation</td>
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<td>
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H <input type="text" size="5" data-bind="value: heading">
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P <input type="text" size="5" data-bind="value: pitch">
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R <input type="text" size="5" data-bind="value: roll">
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<script id="cesium_sandcastle_script">
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function startup(Cesium) {
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'use strict';
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//Sandcastle_Begin
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var viewer = new Cesium.Viewer('cesiumContainer');
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//Set the random number seed for consistent results.
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Cesium.Math.setRandomNumberSeed(3);
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//Set bounds of our simulation time
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var start = Cesium.JulianDate.fromDate(new Date(2015, 2, 25, 16));
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var stop = Cesium.JulianDate.addSeconds(start, 360, new Cesium.JulianDate());
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//Make sure viewer is at the desired time.
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viewer.clock.startTime = start.clone();
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viewer.clock.stopTime = stop.clone();
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viewer.clock.currentTime = start.clone();
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viewer.clock.clockRange = Cesium.ClockRange.LOOP_STOP; //Loop at the end
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viewer.clock.multiplier = 1;
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viewer.clock.shouldAnimate = true;
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//Set timeline to simulation bounds
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viewer.timeline.zoomTo(start, stop);
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var viewModel = {
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emissionRate : 5.0,
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gravity : 0.0,
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minimumParticleLife : 1.0,
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maximumParticleLife : 1.0,
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minimumSpeed : 1.0,
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maximumSpeed : 4.0,
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startScale : 1.0,
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endScale : 5.0,
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particleSize : 25.0,
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transX : 2.5,
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transY : 4.0,
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transZ : 1.0,
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heading : 0.0,
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pitch : 0.0,
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roll : 0.0,
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fly : true,
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spin : true,
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show : true
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};
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Cesium.knockout.track(viewModel);
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var toolbar = document.getElementById('toolbar');
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Cesium.knockout.applyBindings(viewModel, toolbar);
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var entityPosition = new Cesium.Cartesian3();
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var entityOrientation = new Cesium.Quaternion();
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var rotationMatrix = new Cesium.Matrix3();
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var modelMatrix = new Cesium.Matrix4();
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function computeModelMatrix(entity, time) {
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var position = Cesium.Property.getValueOrUndefined(entity.position, time, entityPosition);
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if (!Cesium.defined(position)) {
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return undefined;
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}
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var orientation = Cesium.Property.getValueOrUndefined(entity.orientation, time, entityOrientation);
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if (!Cesium.defined(orientation)) {
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modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(position, undefined, modelMatrix);
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} else {
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modelMatrix = Cesium.Matrix4.fromRotationTranslation(Cesium.Matrix3.fromQuaternion(orientation, rotationMatrix), position, modelMatrix);
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}
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return modelMatrix;
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}
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var emitterModelMatrix = new Cesium.Matrix4();
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var translation = new Cesium.Cartesian3();
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var rotation = new Cesium.Quaternion();
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var hpr = new Cesium.HeadingPitchRoll();
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var trs = new Cesium.TranslationRotationScale();
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function computeEmitterModelMatrix() {
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hpr = Cesium.HeadingPitchRoll.fromDegrees(viewModel.heading, viewModel.pitch, viewModel.roll, hpr);
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trs.translation = Cesium.Cartesian3.fromElements(viewModel.transX, viewModel.transY, viewModel.transZ, translation);
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trs.rotation = Cesium.Quaternion.fromHeadingPitchRoll(hpr, rotation);
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return Cesium.Matrix4.fromTranslationRotationScale(trs, emitterModelMatrix);
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}
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//Generate a random circular pattern with varying heights.
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function computeCirclularFlight(lon, lat, radius) {
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var property = new Cesium.SampledPositionProperty();
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for (var i = 0; i <= 360; i += 45) {
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var radians = Cesium.Math.toRadians(i);
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var time = Cesium.JulianDate.addSeconds(start, i, new Cesium.JulianDate());
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var position = Cesium.Cartesian3.fromDegrees(lon + (radius * 1.5 * Math.cos(radians)), lat + (radius * Math.sin(radians)), Cesium.Math.nextRandomNumber() * 500 + 1750);
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property.addSample(time, position);
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}
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return property;
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}
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//Compute the entity position property.
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var circularPosition = computeCirclularFlight(-112.110693, 36.0994841, 0.03);
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var staticPosition = Cesium.Cartesian3.fromDegrees(-112.110693, 36.0994841, 1000);
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var entity = viewer.entities.add({
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//Set the entity availability to the same interval as the simulation time.
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availability : new Cesium.TimeIntervalCollection([new Cesium.TimeInterval({
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start : start,
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stop : stop
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})]),
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//Load the Cesium plane model to represent the entity
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model : {
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uri : '../../SampleData/models/CesiumAir/Cesium_Air.gltf',
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minimumPixelSize : 64
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},
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position : staticPosition
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});
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viewer.trackedEntity = entity;
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var scene = viewer.scene;
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var particleSystem = scene.primitives.add(new Cesium.ParticleSystem({
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image : '../../SampleData/fire.png',
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startColor : Cesium.Color.RED.withAlpha(0.7),
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endColor : Cesium.Color.YELLOW.withAlpha(0.3),
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startScale : viewModel.startScale,
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endScale : viewModel.endScale,
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minimumParticleLife : viewModel.minimumParticleLife,
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maximumParticleLife : viewModel.maximumParticleLife,
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minimumSpeed : viewModel.minimumSpeed,
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maximumSpeed : viewModel.maximumSpeed,
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imageSize : new Cesium.Cartesian2(viewModel.particleSize, viewModel.particleSize),
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// Particles per second.
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emissionRate : viewModel.emissionRate,
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bursts : [
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// these burst will occasionally sync to create a multicolored effect
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new Cesium.ParticleBurst({time : 5.0, minimum : 10, maximum : 100}),
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new Cesium.ParticleBurst({time : 10.0, minimum : 50, maximum : 100}),
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new Cesium.ParticleBurst({time : 15.0, minimum : 200, maximum : 300})
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],
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lifetime : 16.0,
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emitter : new Cesium.CircleEmitter(2.0),
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emitterModelMatrix : computeEmitterModelMatrix(),
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updateCallback : applyGravity
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}));
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var gravityScratch = new Cesium.Cartesian3();
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function applyGravity(p, dt) {
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// We need to compute a local up vector for each particle in geocentric space.
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var position = p.position;
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Cesium.Cartesian3.normalize(position, gravityScratch);
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Cesium.Cartesian3.multiplyByScalar(gravityScratch, viewModel.gravity * dt, gravityScratch);
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p.velocity = Cesium.Cartesian3.add(p.velocity, gravityScratch, p.velocity);
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}
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viewer.scene.preUpdate.addEventListener(function(scene, time) {
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particleSystem.modelMatrix = computeModelMatrix(entity, time);
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// Account for any changes to the emitter model matrix.
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particleSystem.emitterModelMatrix = computeEmitterModelMatrix();
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// Spin the emitter if enabled.
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if (viewModel.spin) {
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viewModel.heading += 1.0;
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viewModel.pitch += 1.0;
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viewModel.roll += 1.0;
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}
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});
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Cesium.knockout.getObservable(viewModel, 'emissionRate').subscribe(
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function(newValue) {
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particleSystem.emissionRate = parseFloat(newValue);
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}
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);
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Cesium.knockout.getObservable(viewModel, 'particleSize').subscribe(
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function(newValue) {
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var particleSize = parseFloat(newValue);
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particleSystem.minimumImageSize.x = particleSize;
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particleSystem.minimumImageSize.y = particleSize;
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particleSystem.maximumImageSize.x = particleSize;
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particleSystem.maximumImageSize.y = particleSize;
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}
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);
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Cesium.knockout.getObservable(viewModel, 'minimumParticleLife').subscribe(
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function(newValue) {
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particleSystem.minimumParticleLife = parseFloat(newValue);
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}
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);
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Cesium.knockout.getObservable(viewModel, 'maximumParticleLife').subscribe(
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function(newValue) {
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particleSystem.maximumParticleLife = parseFloat(newValue);
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}
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);
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Cesium.knockout.getObservable(viewModel, 'minimumSpeed').subscribe(
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function(newValue) {
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particleSystem.minimumSpeed = parseFloat(newValue);
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}
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);
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Cesium.knockout.getObservable(viewModel, 'maximumSpeed').subscribe(
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function(newValue) {
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particleSystem.maximumSpeed = parseFloat(newValue);
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}
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);
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Cesium.knockout.getObservable(viewModel, 'startScale').subscribe(
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function(newValue) {
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particleSystem.startScale = parseFloat(newValue);
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}
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);
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Cesium.knockout.getObservable(viewModel, 'endScale').subscribe(
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function(newValue) {
|
||
|
|
particleSystem.endScale = parseFloat(newValue);
|
||
|
|
}
|
||
|
|
);
|
||
|
|
|
||
|
|
Cesium.knockout.getObservable(viewModel, 'fly').subscribe(
|
||
|
|
function(newValue) {
|
||
|
|
if (newValue) {
|
||
|
|
entity.position = circularPosition;
|
||
|
|
//Automatically compute orientation based on position movement.
|
||
|
|
entity.orientation = new Cesium.VelocityOrientationProperty(circularPosition);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
entity.position = staticPosition;
|
||
|
|
entity.orientation = undefined;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
);
|
||
|
|
|
||
|
|
Sandcastle.addToggleButton('Spin', viewModel.spin, function(checked) {
|
||
|
|
viewModel.spin = checked;
|
||
|
|
});
|
||
|
|
|
||
|
|
Sandcastle.addToggleButton('Fly', viewModel.fly, function(checked) {
|
||
|
|
viewModel.fly = checked;
|
||
|
|
});
|
||
|
|
|
||
|
|
Sandcastle.addToggleButton('Show', viewModel.show, function(checked) {
|
||
|
|
entity.show = checked;
|
||
|
|
particleSystem.show = checked;
|
||
|
|
});
|
||
|
|
|
||
|
|
var options = [{
|
||
|
|
text : 'Circle',
|
||
|
|
onselect : function() {
|
||
|
|
particleSystem.emitter = new Cesium.CircleEmitter(2.0);
|
||
|
|
}
|
||
|
|
}, {
|
||
|
|
text : 'Sphere',
|
||
|
|
onselect : function() {
|
||
|
|
particleSystem.emitter = new Cesium.SphereEmitter(2.5);
|
||
|
|
}
|
||
|
|
}, {
|
||
|
|
text : 'Cone',
|
||
|
|
onselect : function() {
|
||
|
|
particleSystem.emitter = new Cesium.ConeEmitter(Cesium.Math.toRadians(45.0));
|
||
|
|
}
|
||
|
|
}, {
|
||
|
|
text : 'Box',
|
||
|
|
onselect : function() {
|
||
|
|
particleSystem.emitter = new Cesium.BoxEmitter(new Cesium.Cartesian3(10.0, 10.0, 10.0));
|
||
|
|
}
|
||
|
|
}];
|
||
|
|
|
||
|
|
Sandcastle.addToolbarMenu(options);
|
||
|
|
//Sandcastle_End
|
||
|
|
Sandcastle.finishedLoading();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof Cesium !== 'undefined') {
|
||
|
|
startup(Cesium);
|
||
|
|
} else if (typeof require === 'function') {
|
||
|
|
require(['Cesium'], startup);
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|