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Heatmap: Add support for exemplar rendering with native heatmap-cells (#77324)

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This commit is contained in:
Leon Sorokin
2023-10-30 14:16:57 -05:00
committed by GitHub
parent abebcf4385
commit c923e730d5
2 changed files with 30 additions and 14 deletions
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17
public/app/plugins/panel/heatmap/utils.ts
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@ -784,10 +784,19 @@ export function heatmapPathsPoints(opts: PointsBuilderOpts, exemplarColor: strin
for (let i = 0; i < dataX.length; i++) {
let yVal = dataY[i]!;
yVal -= 0.5; // center vertically in bucket (when tiles are le)
// y-randomize vertically to distribute exemplars in same bucket at same time
let randSign = Math.round(Math.random()) * 2 - 1;
yVal += randSign * 0.5 * Math.random();
// this is a hacky by-proxy check
// works okay since we have no exemplars in calculated heatmaps and...
// - heatmap-rows has ordinal y
// - heatmap-cells has log2 y
let isSparseHeatmap = scaleY.distr === 3 && scaleY.log === 2;
if (!isSparseHeatmap) {
yVal -= 0.5; // center vertically in bucket (when tiles are le)
// y-randomize vertically to distribute exemplars in same bucket at same time
let randSign = Math.round(Math.random()) * 2 - 1;
yVal += randSign * 0.5 * Math.random();
}
let x = valToPosX(dataX[i], scaleX, xDim, xOff);
let y = valToPosY(yVal, scaleY, yDim, yOff);