CZML frames per seconds at a crawl with few entities

1. A concise explanation of the problem you’re experiencing.

Just a few animated ellipsoid entities cause the frame rate to drop to an unusable number. Could someone help me understand why this is happening and if there is a better way to accomplish this?

2. A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.

Here is a link to a sandcastle: LINK

And here is code with czml (you may need to zoom out to see the train of entities) - As the animation plays ellipsoids are added to the scene and the fps drops to a crawl - On my machine, 5 fps.

var czml = [

{

“id”: “document”,

“name”: “CZML”,

“version”: “1.0”

},

{

“id”: “9927edc4-e87a-4e1f-9b8b-0bfb3b05b227”,

“name”: “Accesses”,

“description”: “List of Accesses”

},

{

“id”: “platform0”,

“name”: “platform0”,

“parent”: “9927edc4-e87a-4e1f-9b8b-0bfb3b05b227”,

“availability”: “2019-08-06T06:00:00.000Z/2019-08-06T06:01:00.000Z”,

“position”: {

“epoch”: “2019-08-06T06:00:00.000Z”,

“cartographicDegrees”: [

0,

-118.3564964776109,

33.381714076221606,

400,

88.0320876083396,

-118.34407640736474,

33.36974010220352,

400

]

},

“ellipsoid”: {

“radii”: {

“cartesian”: [

20,

20,

20

]

},

“heightReference”: “RELATIVE_TO_GROUND”,

“material”: {

“solidColor”: {

“color”: {

“rgba”: [

0,

255,

0,

255

]

}

}

}

}

},

{

“id”: “platform1”,

“name”: “platform1”,

“parent”: “9927edc4-e87a-4e1f-9b8b-0bfb3b05b227”,

“availability”: “2019-08-06T06:00:00.000Z/2019-08-06T06:01:00.000Z”,

“position”: {

“epoch”: “2019-08-06T06:00:00.000Z”,

“cartographicDegrees”: [

3,

-118.3564964776109,

33.381714076221606,

400,

91.0320876083396,

-118.34407640736474,

33.36974010220352,

400

]

},

“ellipsoid”: {

“radii”: {

“cartesian”: [

20,

20,

20

]

},

“heightReference”: “RELATIVE_TO_GROUND”,

“material”: {

“solidColor”: {

“color”: {

“rgba”: [

0,

255,

0,

255

]

}

}

}

}

},

{

“id”: “platform2”,

“name”: “platform2”,

“parent”: “9927edc4-e87a-4e1f-9b8b-0bfb3b05b227”,

“availability”: “2019-08-06T06:00:00.000Z/2019-08-06T06:01:00.000Z”,

“position”: {

“epoch”: “2019-08-06T06:00:00.000Z”,

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33.381714076221606,

400,

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400

]

},

“ellipsoid”: {

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20,

20,

20

]

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“material”: {

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“name”: “platform3”,

“parent”: “9927edc4-e87a-4e1f-9b8b-0bfb3b05b227”,

“availability”: “2019-08-06T06:00:00.000Z/2019-08-06T06:01:00.000Z”,

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400,

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400

]

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20,

20,

20

]

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“heightReference”: “RELATIVE_TO_GROUND”,

“material”: {

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“name”: “platform4”,

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“availability”: “2019-08-06T06:00:00.000Z/2019-08-06T06:01:00.000Z”,

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“availability”: “2019-08-06T06:00:00.000Z/2019-08-06T06:01:00.000Z”,

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``

3. Context. Why do you need to do this? We might know a better way to accomplish your goal.

I would like to show a graphic indicating the bounding volume of an aircraft - specified in meters. Points seem to render fast, but I can’t specify the width in meters. I have tried different materials too.

4. The Cesium version you’re using, your operating system and browser.

cesium: 1.59.0

OS: Linux pop-os 5.0.0-23-generic #24-Ubuntu SMP Mon Jul 29 15:36:44 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Browser: I have tried on chrome, chromium, and firefox. I usually use chrome or chromium.