import AssociativeArray from '../Core/AssociativeArray.js';
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import Cartesian3 from '../Core/Cartesian3.js';
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import defined from '../Core/defined.js';
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import destroyObject from '../Core/destroyObject.js';
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import DeveloperError from '../Core/DeveloperError.js';
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import JulianDate from '../Core/JulianDate.js';
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import Matrix3 from '../Core/Matrix3.js';
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import Matrix4 from '../Core/Matrix4.js';
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import ReferenceFrame from '../Core/ReferenceFrame.js';
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import TimeInterval from '../Core/TimeInterval.js';
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import Transforms from '../Core/Transforms.js';
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import PolylineCollection from '../Scene/PolylineCollection.js';
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import SceneMode from '../Scene/SceneMode.js';
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import CompositePositionProperty from './CompositePositionProperty.js';
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import ConstantPositionProperty from './ConstantPositionProperty.js';
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import MaterialProperty from './MaterialProperty.js';
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import Property from './Property.js';
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import ReferenceProperty from './ReferenceProperty.js';
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import SampledPositionProperty from './SampledPositionProperty.js';
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import ScaledPositionProperty from './ScaledPositionProperty.js';
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import TimeIntervalCollectionPositionProperty from './TimeIntervalCollectionPositionProperty.js';
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var defaultResolution = 60.0;
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var defaultWidth = 1.0;
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var scratchTimeInterval = new TimeInterval();
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var subSampleCompositePropertyScratch = new TimeInterval();
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var subSampleIntervalPropertyScratch = new TimeInterval();
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function EntityData(entity) {
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this.entity = entity;
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this.polyline = undefined;
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this.index = undefined;
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this.updater = undefined;
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}
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function subSampleSampledProperty(property, start, stop, times, updateTime, referenceFrame, maximumStep, startingIndex, result) {
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var r = startingIndex;
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//Always step exactly on start (but only use it if it exists.)
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var tmp;
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tmp = property.getValueInReferenceFrame(start, referenceFrame, result[r]);
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if (defined(tmp)) {
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result[r++] = tmp;
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}
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var steppedOnNow = !defined(updateTime) || JulianDate.lessThanOrEquals(updateTime, start) || JulianDate.greaterThanOrEquals(updateTime, stop);
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//Iterate over all interval times and add the ones that fall in our
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//time range. Note that times can contain data outside of
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//the intervals range. This is by design for use with interpolation.
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var t = 0;
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var len = times.length;
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var current = times[t];
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var loopStop = stop;
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var sampling = false;
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var sampleStepsToTake;
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var sampleStepsTaken;
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var sampleStepSize;
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while (t < len) {
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if (!steppedOnNow && JulianDate.greaterThanOrEquals(current, updateTime)) {
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tmp = property.getValueInReferenceFrame(updateTime, referenceFrame, result[r]);
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if (defined(tmp)) {
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result[r++] = tmp;
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}
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steppedOnNow = true;
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}
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if (JulianDate.greaterThan(current, start) && JulianDate.lessThan(current, loopStop) && !current.equals(updateTime)) {
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tmp = property.getValueInReferenceFrame(current, referenceFrame, result[r]);
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if (defined(tmp)) {
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result[r++] = tmp;
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}
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}
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if (t < (len - 1)) {
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if (maximumStep > 0 && !sampling) {
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var next = times[t + 1];
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var secondsUntilNext = JulianDate.secondsDifference(next, current);
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sampling = secondsUntilNext > maximumStep;
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if (sampling) {
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sampleStepsToTake = Math.ceil(secondsUntilNext / maximumStep);
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sampleStepsTaken = 0;
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sampleStepSize = secondsUntilNext / Math.max(sampleStepsToTake, 2);
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sampleStepsToTake = Math.max(sampleStepsToTake - 1, 1);
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}
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}
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if (sampling && sampleStepsTaken < sampleStepsToTake) {
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current = JulianDate.addSeconds(current, sampleStepSize, new JulianDate());
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sampleStepsTaken++;
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continue;
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}
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}
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sampling = false;
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t++;
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current = times[t];
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}
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//Always step exactly on stop (but only use it if it exists.)
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tmp = property.getValueInReferenceFrame(stop, referenceFrame, result[r]);
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if (defined(tmp)) {
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result[r++] = tmp;
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}
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return r;
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}
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function subSampleGenericProperty(property, start, stop, updateTime, referenceFrame, maximumStep, startingIndex, result) {
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var tmp;
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var i = 0;
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var index = startingIndex;
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var time = start;
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var stepSize = Math.max(maximumStep, 60);
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var steppedOnNow = !defined(updateTime) || JulianDate.lessThanOrEquals(updateTime, start) || JulianDate.greaterThanOrEquals(updateTime, stop);
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while (JulianDate.lessThan(time, stop)) {
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if (!steppedOnNow && JulianDate.greaterThanOrEquals(time, updateTime)) {
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steppedOnNow = true;
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tmp = property.getValueInReferenceFrame(updateTime, referenceFrame, result[index]);
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if (defined(tmp)) {
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result[index] = tmp;
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index++;
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}
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}
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tmp = property.getValueInReferenceFrame(time, referenceFrame, result[index]);
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if (defined(tmp)) {
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result[index] = tmp;
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index++;
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}
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i++;
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time = JulianDate.addSeconds(start, stepSize * i, new JulianDate());
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}
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//Always sample stop.
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tmp = property.getValueInReferenceFrame(stop, referenceFrame, result[index]);
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if (defined(tmp)) {
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result[index] = tmp;
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index++;
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}
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return index;
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}
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function subSampleIntervalProperty(property, start, stop, updateTime, referenceFrame, maximumStep, startingIndex, result) {
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subSampleIntervalPropertyScratch.start = start;
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subSampleIntervalPropertyScratch.stop = stop;
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var index = startingIndex;
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var intervals = property.intervals;
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for (var i = 0; i < intervals.length; i++) {
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var interval = intervals.get(i);
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if (!TimeInterval.intersect(interval, subSampleIntervalPropertyScratch, scratchTimeInterval).isEmpty) {
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var time = interval.start;
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if (!interval.isStartIncluded) {
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if (interval.isStopIncluded) {
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time = interval.stop;
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} else {
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time = JulianDate.addSeconds(interval.start, JulianDate.secondsDifference(interval.stop, interval.start) / 2, new JulianDate());
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}
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}
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var tmp = property.getValueInReferenceFrame(time, referenceFrame, result[index]);
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if (defined(tmp)) {
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result[index] = tmp;
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index++;
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}
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}
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}
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return index;
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}
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function subSampleConstantProperty(property, start, stop, updateTime, referenceFrame, maximumStep, startingIndex, result) {
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var tmp = property.getValueInReferenceFrame(start, referenceFrame, result[startingIndex]);
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if (defined(tmp)) {
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result[startingIndex++] = tmp;
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}
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return startingIndex;
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}
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function subSampleCompositeProperty(property, start, stop, updateTime, referenceFrame, maximumStep, startingIndex, result) {
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subSampleCompositePropertyScratch.start = start;
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subSampleCompositePropertyScratch.stop = stop;
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var index = startingIndex;
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var intervals = property.intervals;
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for (var i = 0; i < intervals.length; i++) {
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var interval = intervals.get(i);
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if (!TimeInterval.intersect(interval, subSampleCompositePropertyScratch, scratchTimeInterval).isEmpty) {
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var intervalStart = interval.start;
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var intervalStop = interval.stop;
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var sampleStart = start;
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if (JulianDate.greaterThan(intervalStart, sampleStart)) {
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sampleStart = intervalStart;
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}
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var sampleStop = stop;
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if (JulianDate.lessThan(intervalStop, sampleStop)) {
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sampleStop = intervalStop;
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}
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index = reallySubSample(interval.data, sampleStart, sampleStop, updateTime, referenceFrame, maximumStep, index, result);
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}
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}
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return index;
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}
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function reallySubSample(property, start, stop, updateTime, referenceFrame, maximumStep, index, result) {
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//Unwrap any references until we have the actual property.
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while (property instanceof ReferenceProperty) {
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property = property.resolvedProperty;
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}
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if (property instanceof SampledPositionProperty) {
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var times = property._property._times;
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index = subSampleSampledProperty(property, start, stop, times, updateTime, referenceFrame, maximumStep, index, result);
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} else if (property instanceof CompositePositionProperty) {
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index = subSampleCompositeProperty(property, start, stop, updateTime, referenceFrame, maximumStep, index, result);
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} else if (property instanceof TimeIntervalCollectionPositionProperty) {
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index = subSampleIntervalProperty(property, start, stop, updateTime, referenceFrame, maximumStep, index, result);
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} else if (property instanceof ConstantPositionProperty ||
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(property instanceof ScaledPositionProperty && Property.isConstant(property))) {
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index = subSampleConstantProperty(property, start, stop, updateTime, referenceFrame, maximumStep, index, result);
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} else {
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//Fallback to generic sampling.
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index = subSampleGenericProperty(property, start, stop, updateTime, referenceFrame, maximumStep, index, result);
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}
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return index;
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}
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function subSample(property, start, stop, updateTime, referenceFrame, maximumStep, result) {
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if (!defined(result)) {
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result = [];
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}
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var length = reallySubSample(property, start, stop, updateTime, referenceFrame, maximumStep, 0, result);
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result.length = length;
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return result;
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}
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var toFixedScratch = new Matrix3();
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function PolylineUpdater(scene, referenceFrame) {
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this._unusedIndexes = [];
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this._polylineCollection = new PolylineCollection();
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this._scene = scene;
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this._referenceFrame = referenceFrame;
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scene.primitives.add(this._polylineCollection);
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}
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PolylineUpdater.prototype.update = function(time) {
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if (this._referenceFrame === ReferenceFrame.INERTIAL) {
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var toFixed = Transforms.computeIcrfToFixedMatrix(time, toFixedScratch);
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if (!defined(toFixed)) {
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toFixed = Transforms.computeTemeToPseudoFixedMatrix(time, toFixedScratch);
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}
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Matrix4.fromRotationTranslation(toFixed, Cartesian3.ZERO, this._polylineCollection.modelMatrix);
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}
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};
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PolylineUpdater.prototype.updateObject = function(time, item) {
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var entity = item.entity;
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var pathGraphics = entity._path;
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var positionProperty = entity._position;
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var sampleStart;
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var sampleStop;
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var showProperty = pathGraphics._show;
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var polyline = item.polyline;
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var show = entity.isShowing && (!defined(showProperty) || showProperty.getValue(time));
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//While we want to show the path, there may not actually be anything to show
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//depending on lead/trail settings. Compute the interval of the path to
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//show and check against actual availability.
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if (show) {
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var leadTime = Property.getValueOrUndefined(pathGraphics._leadTime, time);
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var trailTime = Property.getValueOrUndefined(pathGraphics._trailTime, time);
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var availability = entity._availability;
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var hasAvailability = defined(availability);
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var hasLeadTime = defined(leadTime);
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var hasTrailTime = defined(trailTime);
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//Objects need to have either defined availability or both a lead and trail time in order to
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//draw a path (since we can't draw "infinite" paths.
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show = hasAvailability || (hasLeadTime && hasTrailTime);
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//The final step is to compute the actual start/stop times of the path to show.
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//If current time is outside of the availability interval, there's a chance that
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//we won't have to draw anything anyway.
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if (show) {
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if (hasTrailTime) {
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sampleStart = JulianDate.addSeconds(time, -trailTime, new JulianDate());
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}
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if (hasLeadTime) {
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sampleStop = JulianDate.addSeconds(time, leadTime, new JulianDate());
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}
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if (hasAvailability) {
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var start = availability.start;
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var stop = availability.stop;
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if (!hasTrailTime || JulianDate.greaterThan(start, sampleStart)) {
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sampleStart = start;
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}
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if (!hasLeadTime || JulianDate.lessThan(stop, sampleStop)) {
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sampleStop = stop;
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}
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}
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show = JulianDate.lessThan(sampleStart, sampleStop);
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}
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}
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if (!show) {
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//don't bother creating or updating anything else
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if (defined(polyline)) {
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this._unusedIndexes.push(item.index);
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item.polyline = undefined;
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polyline.show = false;
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item.index = undefined;
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}
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return;
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}
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if (!defined(polyline)) {
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var unusedIndexes = this._unusedIndexes;
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var length = unusedIndexes.length;
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if (length > 0) {
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var index = unusedIndexes.pop();
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polyline = this._polylineCollection.get(index);
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item.index = index;
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} else {
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item.index = this._polylineCollection.length;
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polyline = this._polylineCollection.add();
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}
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polyline.id = entity;
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item.polyline = polyline;
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}
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var resolution = Property.getValueOrDefault(pathGraphics._resolution, time, defaultResolution);
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polyline.show = true;
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polyline.positions = subSample(positionProperty, sampleStart, sampleStop, time, this._referenceFrame, resolution, polyline.positions.slice());
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polyline.material = MaterialProperty.getValue(time, pathGraphics._material, polyline.material);
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polyline.width = Property.getValueOrDefault(pathGraphics._width, time, defaultWidth);
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polyline.distanceDisplayCondition = Property.getValueOrUndefined(pathGraphics._distanceDisplayCondition, time, polyline.distanceDisplayCondition);
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};
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PolylineUpdater.prototype.removeObject = function(item) {
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var polyline = item.polyline;
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if (defined(polyline)) {
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this._unusedIndexes.push(item.index);
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item.polyline = undefined;
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polyline.show = false;
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polyline.id = undefined;
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item.index = undefined;
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}
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};
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PolylineUpdater.prototype.destroy = function() {
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this._scene.primitives.remove(this._polylineCollection);
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return destroyObject(this);
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};
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/**
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* A {@link Visualizer} which maps {@link Entity#path} to a {@link Polyline}.
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* @alias PathVisualizer
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* @constructor
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*
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* @param {Scene} scene The scene the primitives will be rendered in.
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* @param {EntityCollection} entityCollection The entityCollection to visualize.
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*/
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function PathVisualizer(scene, entityCollection) {
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//>>includeStart('debug', pragmas.debug);
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if (!defined(scene)) {
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throw new DeveloperError('scene is required.');
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}
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if (!defined(entityCollection)) {
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throw new DeveloperError('entityCollection is required.');
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}
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//>>includeEnd('debug');
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entityCollection.collectionChanged.addEventListener(PathVisualizer.prototype._onCollectionChanged, this);
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this._scene = scene;
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this._updaters = {};
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this._entityCollection = entityCollection;
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this._items = new AssociativeArray();
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this._onCollectionChanged(entityCollection, entityCollection.values, [], []);
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}
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/**
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* Updates all of the primitives created by this visualizer to match their
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* Entity counterpart at the given time.
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*
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* @param {JulianDate} time The time to update to.
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* @returns {Boolean} This function always returns true.
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*/
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PathVisualizer.prototype.update = function(time) {
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//>>includeStart('debug', pragmas.debug);
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if (!defined(time)) {
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throw new DeveloperError('time is required.');
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}
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//>>includeEnd('debug');
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var updaters = this._updaters;
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for (var key in updaters) {
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if (updaters.hasOwnProperty(key)) {
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updaters[key].update(time);
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}
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}
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var items = this._items.values;
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if (items.length === 0 && defined(this._updaters) && Object.keys(this._updaters).length > 0) {
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for (var u in updaters) {
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if (updaters.hasOwnProperty(u)) {
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updaters[u].destroy();
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}
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}
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this._updaters = {};
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}
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for (var i = 0, len = items.length; i < len; i++) {
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var item = items[i];
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var entity = item.entity;
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var positionProperty = entity._position;
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var lastUpdater = item.updater;
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var frameToVisualize = ReferenceFrame.FIXED;
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if (this._scene.mode === SceneMode.SCENE3D) {
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frameToVisualize = positionProperty.referenceFrame;
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}
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var currentUpdater = this._updaters[frameToVisualize];
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if ((lastUpdater === currentUpdater) && (defined(currentUpdater))) {
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currentUpdater.updateObject(time, item);
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continue;
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}
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if (defined(lastUpdater)) {
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lastUpdater.removeObject(item);
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}
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if (!defined(currentUpdater)) {
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currentUpdater = new PolylineUpdater(this._scene, frameToVisualize);
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currentUpdater.update(time);
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this._updaters[frameToVisualize] = currentUpdater;
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}
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item.updater = currentUpdater;
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if (defined(currentUpdater)) {
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currentUpdater.updateObject(time, item);
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}
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}
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return true;
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};
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/**
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* Returns true if this object was destroyed; otherwise, false.
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*
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* @returns {Boolean} True if this object was destroyed; otherwise, false.
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*/
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PathVisualizer.prototype.isDestroyed = function() {
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return false;
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};
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/**
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* Removes and destroys all primitives created by this instance.
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*/
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PathVisualizer.prototype.destroy = function() {
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this._entityCollection.collectionChanged.removeEventListener(PathVisualizer.prototype._onCollectionChanged, this);
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var updaters = this._updaters;
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for ( var key in updaters) {
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if (updaters.hasOwnProperty(key)) {
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updaters[key].destroy();
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}
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}
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return destroyObject(this);
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};
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PathVisualizer.prototype._onCollectionChanged = function(entityCollection, added, removed, changed) {
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var i;
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var entity;
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var item;
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var items = this._items;
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for (i = added.length - 1; i > -1; i--) {
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entity = added[i];
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if (defined(entity._path) && defined(entity._position)) {
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items.set(entity.id, new EntityData(entity));
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}
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}
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for (i = changed.length - 1; i > -1; i--) {
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entity = changed[i];
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if (defined(entity._path) && defined(entity._position)) {
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if (!items.contains(entity.id)) {
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items.set(entity.id, new EntityData(entity));
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}
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} else {
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item = items.get(entity.id);
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if (defined(item)) {
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if (defined(item.updater)) {
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item.updater.removeObject(item);
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}
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items.remove(entity.id);
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}
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}
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}
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for (i = removed.length - 1; i > -1; i--) {
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entity = removed[i];
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item = items.get(entity.id);
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if (defined(item)) {
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if (defined(item.updater)) {
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item.updater.removeObject(item);
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}
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items.remove(entity.id);
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}
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}
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};
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//for testing
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PathVisualizer._subSample = subSample;
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export default PathVisualizer;
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