KML and clampToGround option

[lilleyse]

Similar KML to #8238 but with both tessellate and altitudeMode set so that the whole line should clamp to terrain. However it only clamps to terrain if options.clampToGround is true. Should it clamp to terrain automatically even if that option isn't passed in?

<?xml version="1.0" encoding="utf-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
  <Document>
    <Folder>
      <Placemark>
        <LineString>
          <tessellate>1</tessellate>
          <altitudeMode>clampToGround</altitudeMode>
          <coordinates>-94.2853118971204,34.0604044149558,200.0
            -95.2849440296246,34.0600224952286,200.0</coordinates>
        </LineString>
      </Placemark>
    </Folder>
  </Document>
</kml>

Sandcastle (will need to replace url with a different url)

[mramato]

It is clamping to the ellipsoid or not clamping at all?

Should it clamp to terrain automatically even if that option isn't passed in?

No, the entire reason clampToGround is optional is because ground primitives have caveats that need to be addressed before we basically just turn it on by default everywhere (i.e. terrain on by default)

[lilleyse]

It is clamping to the ellipsoid or not clamping at all?

It's setting the height values to zero and not using ground polylines.

No, the entire reason clampToGround is optional is because ground primitives have caveats that need to be addressed before we basically just turn it on by default everywhere (i.e. terrain on by default)

Ah, ok. I added a checkbox to #5942

[lilleyse]

Also - the original KML snippet I posted had 0.0 heights but I changed those to 200.0. Ultimately the heights are replaced with 0.0 but it's clearer that it happens if the source heights are not 0.0.