scene.capture() does not include labels

The function scene.capture(filename) does not consider labels.

Execute the following code in a jupyter notebook:

from vpython import *
sphere()
label(text='TEXT')
scene.capture('image.png')

Expected output	Actually saved

I noticed that there are two canvas elements in the HTML, one containing the labels, and the other being a placeholder for the 3D objects:

<div class="glowscript-canvas-wrapper ui-resizable" style="display: inline-block; position: relative; float: none;">
    <canvas style="position: absolute;" width="640" height="400"></canvas>
    <canvas style="position: relative; background-color: transparent;" width="640" height="400"></canvas>
    <div class="ui-resizable-handle ui-resizable-e" style="z-index: 90;"></div>
    <div class="ui-resizable-handle ui-resizable-s" style="z-index: 90;"></div>
    <div class="ui-resizable-handle ui-resizable-se ui-icon ui-icon-gripsmall-diagonal-se" style="z-index: 90;"></div>
</div>

It seems that the capturing function here only considers one of them.

[BruceSherwood]

I tried your code with GlowScript VPython 3.2dev, and it hangs for me on this statement:

await new Promise(r => img.onload=r); // wait for image to be loaded

??

[eltos]

You can replace the line with await img.decode();, which is essentially the same (it returns a promise) but should handle either case. I added a second commit to the merge request.