Model3D view lost in PR 44

[enritoomey]

After PR #44, I was unable to plot models in the CZMLWidget().

Here is the code:

from czml3 import Document, Packet, Preamble
from czml3.properties import Model, Position, Orientation, Clock
from czml3.widget import CZMLWidget
import datetime

doc = Document([
    Preamble(name="newsat1_test"),
    Packet(
        position=Position(cartographicDegrees=[-77, 37, 0]),
        orientation=Orientation(unitQuaternion=[0, 0, 0, 1]),
        model=Model(
            gltf="http://localhost:8890/Cesium_Air.glb",  # Para comparar
            scale=2.0,
            minimumPixelSize=128,
        )
    ),
    
])

CZMLWidget(doc)

The widget is display, but no model is rendered.

[astrojuanlu]

This is the diff:

$ diff -u old.txt new.txt | colordiff
--- old.txt	2019-11-07 08:14:05.476858282 +0100
+++ new.txt	2019-11-07 08:13:42.044832040 +0100
@@ -1,11 +1,10 @@
 [
     {
-        "id": "document",
         "version": "1.0",
         "name": "newsat1_test"
     },
     {
-        "id": "6424c9b2-02d6-4020-aed4-3bbe954388ca",
+        "id": "4910ae43-42f7-4939-8365-e4038eada12c",
         "position": {
             "cartographicDegrees": [
                 -77,
@@ -28,9 +27,9 @@
         }
     },
     {
-        "id": "37d38c18-ed23-403c-ba55-468077cb9f0f",
+        "id": "cdd057e3-67e0-4c4b-97a0-2ea45e08cd0d",
         "position": {
-            "epoch": "2019-11-07T07:14:05Z",
+            "epoch": "2019-11-07T07:13:42Z",
             "interpolationAlgorithm": "LAGRANGE",
             "interpolationDegree": 5,
             "referenceFrame": "FIXED",

Therefore, it seems we're missing the id of the preamble. Looking into it.

[astrojuanlu]

Also, FYI: https://blog.ganssle.io/articles/2019/11/utcnow.html