Report BUG - Valid Coordinates throwing error

CesiumJS
1

1. A concise explanation of the problem you're experiencing.
I think I found a bug with Cesium Viewer. Valid coordinates cause error: "RangeError: Invalid array length". I have created a simple CZML with 6 objects at a height of 7059140 meters above origin (0,0,0:center of the earth). I estimate this should be near LEO orbit height of about 427 miles above the surface of the earth. Each object is at one of the extremes of positive / negative each for X / Y / Z. I created the CZML file and dropped it onto Cesium Viewer.

https://cesiumjs.org/Cesium/Build/Apps/CesiumViewer/

It throws an error "RangeError: Invalid array length".

I can work around the error is a strange way. I add 1mm (0.001 Meters) to the magnitude of each of the negative vectors X, Y, Z. The error mysteriously goes away.

2. A minimal code example. If you've found a bug, this helps us reproduce and repair it.
I have included two CZML files "f1_error.czml" and "f2_fixed.czml".

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

4. The Cesium version you're using, your operating system and browser.
Live online.
I was unable to attach files. I have pasted contents here:

Files:
f1_error.czml:

[
  {
    "id":"document",
    "name":"demo_bug",
    "version":"1.0",
    "clock":{
      "interval":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
      "currentTime":"2012-03-15T10:00:00Z",
      "multiplier":720,
      "range":"LOOP_STOP",
      "step":"SYSTEM_CLOCK_MULTIPLIER"
    }
  },
  {
    "id":"X1POS",
    "name":"",
    "availability":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
    "description":"",
    "billboard":{
      "eyeOffset":{"cartesian":[0,0,0]},
      "horizontalOrigin":"CENTER",
      "image":"data:image/png;base64,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",
      "pixelOffset":{"cartesian2":[0,0]},
      "scale":0.50,
      "show":true,
      "verticalOrigin":"CENTER"
    },
    "position":{
      "interpolationAlgorithm":"LAGRANGE",
      "interpolationDegree":5,
      "referenceFrame":"INERTIAL",
      "epoch":"2012-03-15T10:00:00Z",
      "cartesian":[7059140.000,0.000,0.000]
    }
  },
  {
    "id":"X2NEG",
    "name":"",
    "availability":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
    "description":"RangeError: Invalid array length",
    "billboard":{
      "eyeOffset":{"cartesian":[0,0,0]},
      "horizontalOrigin":"CENTER",
      "image":"data:image/png;base64,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",
      "pixelOffset":{"cartesian2":[0,0]},
      "scale":0.50,
      "show":true,
      "verticalOrigin":"CENTER"
    },
    "position":{
      "interpolationAlgorithm":"LAGRANGE",
      "interpolationDegree":5,
      "referenceFrame":"INERTIAL",
      "epoch":"2012-03-15T10:00:00Z",
      "cartesian":[-7059140.000,0.000,0.000]
    }
  },
  {
    "id":"Y1POS",
    "name":"",
    "availability":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
    "description":"",
    "billboard":{
      "eyeOffset":{"cartesian":[0,0,0]},
      "horizontalOrigin":"CENTER",
      "image":"data:image/png;base64,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",
      "pixelOffset":{"cartesian2":[0,0]},
      "scale":0.50,
      "show":true,
      "verticalOrigin":"CENTER"
    },
    "position":{
      "interpolationAlgorithm":"LAGRANGE",
      "interpolationDegree":5,
      "referenceFrame":"INERTIAL",
      "epoch":"2012-03-15T10:00:00Z",
      "cartesian":[0.000,7059140.000,0.000]
    }
  },
  {
    "id":"Y2NEG",
    "name":"",
    "availability":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
    "description":"",
    "billboard":{
      "eyeOffset":{"cartesian":[0,0,0]},
      "horizontalOrigin":"CENTER",
      "image":"data:image/png;base64,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",
      "pixelOffset":{"cartesian2":[0,0]},
      "scale":0.50,
      "show":true,
      "verticalOrigin":"CENTER"
    },
    "position":{
      "interpolationAlgorithm":"LAGRANGE",
      "interpolationDegree":5,
      "referenceFrame":"INERTIAL",
      "epoch":"2012-03-15T10:00:00Z",
      "cartesian":[0.000,-7059140.000,0.000]
    }
  },
  {
    "id":"Z1POS",
    "name":"",
    "availability":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
    "description":"",
    "billboard":{
      "eyeOffset":{"cartesian":[0,0,0]},
      "horizontalOrigin":"CENTER",
      "image":"data:image/png;base64,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",
      "pixelOffset":{"cartesian2":[0,0]},
      "scale":0.50,
      "show":true,
      "verticalOrigin":"CENTER"
    },
    "position":{
      "interpolationAlgorithm":"LAGRANGE",
      "interpolationDegree":5,
      "referenceFrame":"INERTIAL",
      "epoch":"2012-03-15T10:00:00Z",
      "cartesian":[0.000,0.000,7059140.000]
    }
  },
  {
    "id":"Z2NEG",
    "name":"",
    "availability":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
    "description":"",
    "billboard":{
      "eyeOffset":{"cartesian":[0,0,0]},
      "horizontalOrigin":"CENTER",
      "image":"data:image/png;base64,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",
      "pixelOffset":{"cartesian2":[0,0]},
      "scale":0.50,
      "show":true,
      "verticalOrigin":"CENTER"
    },
    "position":{
      "interpolationAlgorithm":"LAGRANGE",
      "interpolationDegree":5,
      "referenceFrame":"INERTIAL",
      "epoch":"2012-03-15T10:00:00Z",
      "cartesian":[0.000,0.000,-7059140.000]
    }
  }
]

f2_fixed.czml:
[
  {
    "id":"document",
    "name":"demo_bug",
    "version":"1.0",
    "clock":{
      "interval":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
      "currentTime":"2012-03-15T10:00:00Z",
      "multiplier":720,
      "range":"LOOP_STOP",
      "step":"SYSTEM_CLOCK_MULTIPLIER"
    }
  },
  {
    "id":"X1POS",
    "name":"",
    "availability":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
    "description":"",
    "billboard":{
      "eyeOffset":{"cartesian":[0,0,0]},
      "horizontalOrigin":"CENTER",
      "image":"data:image/png;base64,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",
      "pixelOffset":{"cartesian2":[0,0]},
      "scale":0.50,
      "show":true,
      "verticalOrigin":"CENTER"
    },
    "position":{
      "interpolationAlgorithm":"LAGRANGE",
      "interpolationDegree":5,
      "referenceFrame":"INERTIAL",
      "epoch":"2012-03-15T10:00:00Z",
      "cartesian":[7059140.000,0.000,0.000]
    }
  },
  {
    "id":"X2NEG",
    "name":"",
    "availability":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
    "description":"Fixed by increasing magnitude of NEG coordinates by 1mm",
    "billboard":{
      "eyeOffset":{"cartesian":[0,0,0]},
      "horizontalOrigin":"CENTER",
      "image":"data:image/png;base64,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",
      "pixelOffset":{"cartesian2":[0,0]},
      "scale":0.50,
      "show":true,
      "verticalOrigin":"CENTER"
    },
    "position":{
      "interpolationAlgorithm":"LAGRANGE",
      "interpolationDegree":5,
      "referenceFrame":"INERTIAL",
      "epoch":"2012-03-15T10:00:00Z",
      "cartesian":[-7059140.001,0.000,0.000]
    }
  },
  {
    "id":"Y1POS",
    "name":"",
    "availability":"2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
    "description":"",
    "billboard":{
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      "horizontalOrigin":"CENTER",
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]

2

This is a bug. Cesium is attempting to compute where to place the camera to see all of the points. To do this Cesium computes the bounding sphere of each of the entities. Because your points are evenly spaced, the center of the bounding sphere is the center of the Earth (0, 0, 0). Cesium detects that the center that the x and y coordinates are zero and assumes that the origin is at one of the poles! By moving the negative vectors 1mm the center of the bounding sphere is moved slightly such that the assumed special case no longer exists.

There’s an existing issue that is related to the problem you’re seeing. I’ve updated that issue with your information.

Scott