ScatterGL plot fails with WebGL errors if more than 16 symbols are used.

Using plotly-latest, a ScatterGL plot will fail and throw WebGL errors if more than 16 symbols are used in the plot.

Repro case can be found at: http://jsfiddle.net/brian428/d7oh4j2m/

I tested and found that the magic number seems to be 16. With 16 symbols, the plot seems to work fine. With 17 symbols, large numbers of WebGL errors appear. For reference, the errors say:

WebGL: INVALID_ENUM: activeTexture: texture unit out of range
bind @ plotly-latest.js:69560
batch @ VM6468:3138
E.stats @ plotly-latest.js:69665
Scatter.drawItem @ plotly-latest.js:68498
Scatter.draw @ plotly-latest.js:68454
draw @ plotly-latest.js:190442
exports.redrawReglTraces @ plotly-latest.js:117493
exports.drawData @ plotly-latest.js:117430
lib.syncOrAsync @ plotly-latest.js:106537
plot @ plotly-latest.js:112017
exports.call @ plotly-latest.js:147449
exports.layoutReplot @ plotly-latest.js:117373
lib.syncOrAsync @ plotly-latest.js:106537
relayout @ plotly-latest.js:113531
wrappedEdit @ plotly-latest.js:114061
exports.call @ plotly-latest.js:147449
handleCartesian @ plotly-latest.js:95936
(anonymous) @ plotly-latest.js:96808

Not sure if it matters, but I’m using the latest Chrome (80.0.3987.132) on Win 10 x64. Also tested with Firefox 74.0 with the same results.

[brian428]

@archmoj sorry it took a bit to return to this, but trying out latest (1.54.5), still seeing the issue. In addition, as number of symbols goes up, more and more points are not displayed. Hover data points to them, but the points themselves are not shown.

Updated repro: http://jsfiddle.net/brian428/d7oh4j2m/

[brian428]

I went back through previous versions and it looks like it started around 1.33.0 or 1.34.0. I didn’t get the errors with 1.32.0.