Gets the index of the polygon line or thumb that has been hit.
Object.defineProperty(PolygonEditEventArgs.prototype, 'index',
get: function()
)
index: number; // read-only
Value that represents the index of the polygon line or thumb that has been hit.
The index's value is set according to the order of creation of polygon lines or thumbs. For example, if the user draws a polygon by creating a set of 2 points or more. First index is created by clicking on the image to create the first thumb or point for the polygon and its index is 0. The second thumb or point index is created by clicking somewhere else to mark the second point and its index is 1. The line that is created from the 2-points has a line index of 0 as it is the first line.
Refer to PanoramicAction
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