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Merge pull request #5807 from AnalyticalGraphicsInc/velocityOrientation
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Add CZML velocity vector orientation support.
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@mramato
mramato authored Sep 27, 2017
2 parents fe84d8e + 03b0a86 commit e01f0b0
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Showing 3 changed files with 1,298 additions and 1,076 deletions.
2 changes: 2 additions & 0 deletions CHANGES.md
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,8 @@ Change Log
* `Scene/PerspectiveOffCenterFrustum` has been removed. Use `Core/PerspectiveOffCenterFrustum`.
* Added ability to add an animation to `ModelAnimationCollection` by its index. [#5815](https://github.com/AnalyticalGraphicsInc/cesium/pull/5815)
* Fixed a bug in `ModelAnimationCollection` that caused adding an animation by its name to throw an error. [#5815](https://github.com/AnalyticalGraphicsInc/cesium/pull/5815)
* Added support in CZML for expressing `orientation` as the velocity vector of an entity, using `velocityReference` syntax. [#5807](https://github.com/AnalyticalGraphicsInc/cesium/pull/5807)
* Fixed CZML processing of `velocityReference` within an interval. [#5738](https://github.com/AnalyticalGraphicsInc/cesium/issues/5738)
* Zoom about mouse now maintains camera heading, pitch, and roll [#4639](https://github.com/AnalyticalGraphicsInc/cesium/pull/5603)
* Fixed a bug in `PolylineCollection` preventing the display of more than 16K points in a single collection [#5538](https://github.com/AnalyticalGraphicsInc/cesium/pull/5782)

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160 changes: 107 additions & 53 deletions Source/DataSources/CzmlDataSource.js
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Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,7 @@ define([
'./StripeOrientation',
'./TimeIntervalCollectionPositionProperty',
'./TimeIntervalCollectionProperty',
'./VelocityOrientationProperty',
'./VelocityVectorProperty',
'./WallGraphics'
], function(
Expand Down Expand Up @@ -172,23 +173,53 @@ define([
StripeOrientation,
TimeIntervalCollectionPositionProperty,
TimeIntervalCollectionProperty,
VelocityOrientationProperty,
VelocityVectorProperty,
WallGraphics) {
'use strict';

// A marker type to distinguish CZML properties where we need to end up with a unit vector.
// The data is still loaded into Cartesian3 objects but they are normalized.
function UnitCartesian3() {}
UnitCartesian3.packedLength = Cartesian3.packedLength;
UnitCartesian3.unpack = Cartesian3.unpack;
UnitCartesian3.pack = Cartesian3.pack;

// As a side note, for the purposes of CZML, Quaternion always indicates a unit quaternion.

var currentId;

function makeReference(collection, referenceString) {
function createReferenceProperty(entityCollection, referenceString) {
if (referenceString[0] === '#') {
referenceString = currentId + referenceString;
}
return ReferenceProperty.fromString(collection, referenceString);
return ReferenceProperty.fromString(entityCollection, referenceString);
}

function createSpecializedProperty(type, entityCollection, packetData) {
if (defined(packetData.reference)) {
return createReferenceProperty(entityCollection, packetData.reference);
}

if (defined(packetData.velocityReference)) {
var referenceProperty = createReferenceProperty(entityCollection, packetData.velocityReference);
switch (type) {
case Cartesian3:
case UnitCartesian3:
return new VelocityVectorProperty(referenceProperty, type === UnitCartesian3);
case Quaternion:
return new VelocityOrientationProperty(referenceProperty);
}
}

throw new RuntimeError(JSON.stringify(packetData) + ' is not valid CZML.');
}

var scratchCartesian = new Cartesian3();
var scratchSpherical = new Spherical();
var scratchCartographic = new Cartographic();
var scratchTimeInterval = new TimeInterval();
var scratchQuaternion = new Quaternion();

function unwrapColorInterval(czmlInterval) {
var rgbaf = czmlInterval.rgbaf;
Expand Down Expand Up @@ -398,17 +429,30 @@ define([
throw new RuntimeError(JSON.stringify(czmlInterval) + ' is not a valid CZML interval.');
}

function normalizePackedCartesianArray(array, startingIndex) {
Cartesian3.unpack(array, startingIndex, scratchCartesian);
Cartesian3.normalize(scratchCartesian, scratchCartesian);
Cartesian3.pack(scratchCartesian, array, startingIndex);
}

function unwrapUnitCartesianInterval(czmlInterval) {
var cartesian = unwrapCartesianInterval(czmlInterval);
if (cartesian.length === 3) {
normalizePackedCartesianArray(cartesian, 0);
return cartesian;
}

for (var i = 1; i < cartesian.length; i += 4) {
normalizePackedCartesianArray(cartesian, i);
}

return cartesian;
}

function normalizePackedQuaternionArray(array, startingIndex) {
var x = array[startingIndex];
var y = array[startingIndex + 1];
var z = array[startingIndex + 2];
var w = array[startingIndex + 3];

var inverseMagnitude = 1.0 / Math.sqrt(x * x + y * y + z * z + w * w);
array[startingIndex] = x * inverseMagnitude;
array[startingIndex + 1] = y * inverseMagnitude;
array[startingIndex + 2] = z * inverseMagnitude;
array[startingIndex + 3] = w * inverseMagnitude;
Quaternion.unpack(array, startingIndex, scratchQuaternion);
Quaternion.normalize(scratchQuaternion, scratchQuaternion);
Quaternion.pack(scratchQuaternion, array, startingIndex);
}

function unwrapQuaternionInterval(czmlInterval) {
Expand Down Expand Up @@ -452,12 +496,13 @@ define([
} else if (czmlInterval.hasOwnProperty('cartesian2')) {
return Cartesian2;
} else if (czmlInterval.hasOwnProperty('cartesian') ||
czmlInterval.hasOwnProperty('unitCartesian') ||
czmlInterval.hasOwnProperty('unitSpherical') ||
czmlInterval.hasOwnProperty('spherical') ||
czmlInterval.hasOwnProperty('cartographicRadians') ||
czmlInterval.hasOwnProperty('cartographicDegrees')) {
return Cartesian3;
} else if (czmlInterval.hasOwnProperty('unitCartesian') ||
czmlInterval.hasOwnProperty('unitSpherical')) {
return UnitCartesian3;
} else if (czmlInterval.hasOwnProperty('rgba') ||
czmlInterval.hasOwnProperty('rgbaf')) {
return Color;
Expand Down Expand Up @@ -514,6 +559,8 @@ define([
return czmlInterval.cartesian2;
case Cartesian3:
return unwrapCartesianInterval(czmlInterval);
case UnitCartesian3:
return unwrapUnitCartesianInterval(czmlInterval);
case Color:
return unwrapColorInterval(czmlInterval);
case ColorBlendMode:
Expand Down Expand Up @@ -614,10 +661,17 @@ define([
var isSampled;
var unwrappedInterval;
var unwrappedIntervalLength;
var isReference = defined(packetData.reference);

// CZML properties can be defined in many ways. Most ways represent a structure for
// encoding a single value (number, string, cartesian, etc.) Regardless of the value type,
// if it encodes a single value it will get loaded into a ConstantProperty eventually.
// Alternatively, there are ways of defining a property that require specialized
// client-side representation. Currently, these are ReferenceProperty,
// and client-side velocity computation properties such as VelocityVectorProperty.
var isValue = !defined(packetData.reference) && !defined(packetData.velocityReference);
var hasInterval = defined(combinedInterval) && !combinedInterval.equals(Iso8601.MAXIMUM_INTERVAL);

if (!isReference) {
if (isValue) {
unwrappedInterval = unwrapInterval(type, packetData, sourceUri, query);
packedLength = defaultValue(type.packedLength, 1);
unwrappedIntervalLength = defaultValue(unwrappedInterval.length, 1);
Expand All @@ -630,12 +684,10 @@ define([

//Any time a constant value is assigned, it completely blows away anything else.
if (!isSampled && !hasInterval) {
if (isReference) {
object[propertyName] = makeReference(entityCollection, packetData.reference);
} else if (needsUnpacking) {
object[propertyName] = new ConstantProperty(type.unpack(unwrappedInterval, 0));
if (isValue) {
object[propertyName] = new ConstantProperty(needsUnpacking ? type.unpack(unwrappedInterval, 0) : unwrappedInterval);
} else {
object[propertyName] = new ConstantProperty(unwrappedInterval);
object[propertyName] = createSpecializedProperty(type, entityCollection, packetData);
}
return;
}
Expand Down Expand Up @@ -668,30 +720,30 @@ define([
if (!isSampled && hasInterval) {
//Create a new interval for the constant value.
combinedInterval = combinedInterval.clone();
if (isReference) {
combinedInterval.data = makeReference(entityCollection, packetData.reference);
} else if (needsUnpacking) {
combinedInterval.data = type.unpack(unwrappedInterval, 0);
if (isValue) {
combinedInterval.data = needsUnpacking ? type.unpack(unwrappedInterval, 0) : unwrappedInterval;
} else {
combinedInterval.data = unwrappedInterval;
combinedInterval.data = createSpecializedProperty(type, entityCollection, packetData);
}

//If no property exists, simply use a new interval collection
if (!defined(property)) {
if (isReference) {
property = new CompositeProperty();
} else {
if (isValue) {
property = new TimeIntervalCollectionProperty();
} else {
property = new CompositeProperty();
}
object[propertyName] = property;
}

if (!isReference && property instanceof TimeIntervalCollectionProperty) {
if (isValue && property instanceof TimeIntervalCollectionProperty) {
//If we create a collection, or it already existed, use it.
property.intervals.addInterval(combinedInterval);
} else if (property instanceof CompositeProperty) {
//If the collection was already a CompositeProperty, use it.
combinedInterval.data = isReference ? combinedInterval.data : new ConstantProperty(combinedInterval.data);
if (isValue) {
combinedInterval.data = new ConstantProperty(combinedInterval.data);
}
property.intervals.addInterval(combinedInterval);
} else {
//Otherwise, create a CompositeProperty but preserve the existing data.
Expand All @@ -708,7 +760,9 @@ define([
property.intervals.addInterval(interval);

//Change the new data to a ConstantProperty and add it.
combinedInterval.data = isReference ? combinedInterval.data : new ConstantProperty(combinedInterval.data);
if (isValue) {
combinedInterval.data = new ConstantProperty(combinedInterval.data);
}
property.intervals.addInterval(combinedInterval);
}

Expand Down Expand Up @@ -781,10 +835,10 @@ define([
var unwrappedIntervalLength;
var numberOfDerivatives = defined(packetData.cartesianVelocity) ? 1 : 0;
var packedLength = Cartesian3.packedLength * (numberOfDerivatives + 1);
var isReference = defined(packetData.reference);
var isValue = !defined(packetData.reference);
var hasInterval = defined(combinedInterval) && !combinedInterval.equals(Iso8601.MAXIMUM_INTERVAL);

if (!isReference) {
if (isValue) {
if (defined(packetData.referenceFrame)) {
referenceFrame = ReferenceFrame[packetData.referenceFrame];
}
Expand All @@ -796,10 +850,10 @@ define([

//Any time a constant value is assigned, it completely blows away anything else.
if (!isSampled && !hasInterval) {
if (isReference) {
object[propertyName] = makeReference(entityCollection, packetData.reference);
} else {
if (isValue) {
object[propertyName] = new ConstantPositionProperty(Cartesian3.unpack(unwrappedInterval), referenceFrame);
} else {
object[propertyName] = createReferenceProperty(entityCollection, packetData.reference);
}
return;
}
Expand Down Expand Up @@ -832,28 +886,30 @@ define([
if (!isSampled && hasInterval) {
//Create a new interval for the constant value.
combinedInterval = combinedInterval.clone();
if (isReference) {
combinedInterval.data = makeReference(entityCollection, packetData.reference);
} else {
if (isValue) {
combinedInterval.data = Cartesian3.unpack(unwrappedInterval);
} else {
combinedInterval.data = createReferenceProperty(entityCollection, packetData.reference);
}

//If no property exists, simply use a new interval collection
if (!defined(property)) {
if (isReference) {
property = new CompositePositionProperty(referenceFrame);
} else {
if (isValue) {
property = new TimeIntervalCollectionPositionProperty(referenceFrame);
} else {
property = new CompositePositionProperty(referenceFrame);
}
object[propertyName] = property;
}

if (!isReference && property instanceof TimeIntervalCollectionPositionProperty && (defined(referenceFrame) && property.referenceFrame === referenceFrame)) {
if (isValue && property instanceof TimeIntervalCollectionPositionProperty && (defined(referenceFrame) && property.referenceFrame === referenceFrame)) {
//If we create a collection, or it already existed, use it.
property.intervals.addInterval(combinedInterval);
} else if (property instanceof CompositePositionProperty) {
//If the collection was already a CompositePositionProperty, use it.
combinedInterval.data = isReference ? combinedInterval.data : new ConstantPositionProperty(combinedInterval.data, referenceFrame);
if (isValue) {
combinedInterval.data = new ConstantPositionProperty(combinedInterval.data, referenceFrame);
}
property.intervals.addInterval(combinedInterval);
} else {
//Otherwise, create a CompositePositionProperty but preserve the existing data.
Expand All @@ -870,7 +926,9 @@ define([
property.intervals.addInterval(interval);

//Change the new data to a ConstantPositionProperty and add it.
combinedInterval.data = isReference ? combinedInterval.data : new ConstantPositionProperty(combinedInterval.data, referenceFrame);
if (isValue) {
combinedInterval.data = new ConstantPositionProperty(combinedInterval.data, referenceFrame);
}
property.intervals.addInterval(combinedInterval);
}

Expand Down Expand Up @@ -1117,7 +1175,7 @@ define([
var references = packetData.references;
if (defined(references)) {
var properties = references.map(function(reference) {
return makeReference(entityCollection, reference);
return createReferenceProperty(entityCollection, reference);
});

var iso8601Interval = packetData.interval;
Expand Down Expand Up @@ -1154,7 +1212,7 @@ define([
function processPositionsPacketData(object, propertyName, positionsData, entityCollection) {
if (defined(positionsData.references)) {
var properties = positionsData.references.map(function(reference) {
return makeReference(entityCollection, reference);
return createReferenceProperty(entityCollection, reference);
});

var iso8601Interval = positionsData.interval;
Expand Down Expand Up @@ -1230,11 +1288,7 @@ define([
return;
}

if (defined(packetData.velocityReference)) {
billboard.alignedAxis = new VelocityVectorProperty(makeReference(entityCollection, packetData.velocityReference), true);
} else {
processPacketData(Cartesian3, billboard, 'alignedAxis', packetData, interval, sourceUri, entityCollection, query);
}
processPacketData(UnitCartesian3, billboard, 'alignedAxis', packetData, interval, sourceUri, entityCollection, query);
}

function processBillboard(entity, packet, entityCollection, sourceUri, query) {
Expand Down
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