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- fix issue scattergl and fill to zero and undefined value #2965

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- fix issue scattergl and fill to zero and undefined value #2965

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15 changes: 11 additions & 4 deletions src/traces/scattergl/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -439,10 +439,17 @@ function plot(gd, subplot, cdata) {
var pos = [], srcPos = (lineOptions && lineOptions.positions) || stash.positions;

if(trace.fill === 'tozeroy') {
pos = [srcPos[0], 0];
pos = pos.concat(srcPos);
pos.push(srcPos[srcPos.length - 2]);
pos.push(0);
var firstdef = 1;
while(isNaN(srcPos[firstdef])) {
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oh hmm - this checks for invalid y, what about invalid x?

firstdef += 2;
}
var lastdef = srcPos.length - 1;
while(isNaN(srcPos[lastdef])) {
lastdef += -2;
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-= 2?

}
pos = [ srcPos[firstdef - 1], 0 ];
pos = pos.concat(srcPos.slice(firstdef - 1, lastdef + 1));
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🐎 so we don't need to slice unnecessarily, can we keep track of whether there actually were invalid points on either end?

pos = pos.concat([ srcPos[lastdef - 1], 0 ]);
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I notice the existing code didn't take advantage of this, but push is variadic:
pos.push(srcPos[lastdef - 1], 0);

}
else if(trace.fill === 'tozerox') {
pos = [0, srcPos[1]];
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Binary file added test/image/baselines/fill_trace.png
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52 changes: 52 additions & 0 deletions test/image/mocks/fill_trace.json
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@@ -0,0 +1,52 @@
{
"data": [
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Would you mind renaming this mock gl2d_fill_trace.json? We like to prefix gl-based mocks by either gl2d_ or gl3d_.

Would should probably write down in the CONTRIBUTING file at some point.

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Good point for this PR - but rather than describing this in CONTRIBUTING.md how about we make the image test system support subfolders and give them a little more organization? It's getting impossible to find what you want in mocks and baselines...

{
"x": [
1,
2,
3,
4,
5
],
"y": [ null
,
100,
100,null
,null
],
"type": "scattergl",
"fill": "tozeroy",
"mode": "none",
"showlegend": false,
"fillcolor": "#90ff70",
"line": { "color": "#90ff70" }

},
{
"x": [
1,
2,
3,
4,
5
],
"y": [null
,null
,null
,
100,
100
],
"type": "scattergl",
"fill": "tozeroy",
"mode": "none",
"showlegend": false,
"fillcolor": "#f02f20",
"line": { "color": "#f02f20" }
}
],
"layout": {
"margin": {"l": 100, "r": 100, "t": 100, "b": 100},
"yaxis": { "title": "Y axis 2 ", "type": "linear", "rangemode": "tozero", "nticks": 3 }
}
}