UAV pose marker 3D

Nobody has claimed this yet.

Hey,

is there an optimized marker for 3D usage? I want to visualize the pose of an UAV, which works well, as long as you don't change the point of view.
Also, I'm using a jquery dialog as container and when I change the size of the dialog, the size of the marker changes too and weirdly moves as well. Other layers, like the LineString, are not affected.

This is how I create the marker:
```
this._poses[data.name] = new maptalks.VectorLayer(data.name, [
new maptalks.Marker(
[data.pose.x, data.pose.y], {
properties: {
altitude: 0
},
symbol: {
'markerType': 'path',
'markerPath': this._pose_marker_path,
'markerWidth': 28,
'markerHeight': 40,
'markerDx': 0,
'markerDy': 6,
'markerOpacity': .5,
'markerFill': '#bbb',

'markerRotation': orientation // marker rotation in degree, clock-wise
}
}
),
new maptalks.Marker(
[data.pose.x, data.pose.y],
{
properties: {
altitude: data.pose.z
},
symbol: {
'markerType': 'path',
'markerPath': this._pose_marker_path,
'markerFill': '#000',
'markerWidth': 28,
'markerHeight': 40,
'markerDx': 0,
'markerDy': 6,
'markerOpacity': 1,

'markerRotation': orientation // marker rotation in degree, clock-wise
}
}
)
], {
enableAltitude: true, // enable altitude
altitudeProperty: 'altitude' // altitude property in properties, default by 'altitude'
})
```

with

```
_pose_marker_path: 'M1683 1331l-166 165q-19 19-45 19t-45-19l-531-531-531 531q-19 19-45 19t-45-19l-166-165q-19-19-19-45.5t19-45.5l742-741q19-19 45-19t45 19l742 741q19 19 19 45.5t-19 45.5z',
```

Direct view:
Opposite side:
Side view:
Shrunk dialog window:

Thanks!

The report uses maptalks.VectorLayer and maptalks.Marker with markerType: path, markerRotation, altitude, and a jQuery dialog; begin by reproducing the direct, opposite, and side views and resizing the dialog. Compare marker rendering with LineString behavior, then verify that the UAV pose marker keeps its position and scale across viewpoint changes and dialog resizing.

Written by the indexing model from the issue text.