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Alpha blend coincident data points #32

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Alpha blend coincident data points #32

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5 changes: 3 additions & 2 deletions src/HeatLayer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -128,7 +128,7 @@ L.HeatLayer = (L.Layer ? L.Layer : L.Class).extend({

max = this.options.max === undefined ? 1 : this.options.max,
maxZoom = this.options.maxZoom === undefined ? this._map.getMaxZoom() : this.options.maxZoom,
v = 1 / Math.pow(2, Math.max(0, Math.min(maxZoom - this._map.getZoom(), 12))),
v = 1, // vestigial
cellSize = r / 2,
grid = [],
panePos = this._map._getMapPanePos(),
Expand Down Expand Up @@ -157,7 +157,8 @@ L.HeatLayer = (L.Layer ? L.Layer : L.Class).extend({
} else {
cell[0] = (cell[0] * cell[2] + p.x * k) / (cell[2] + k); // x
cell[1] = (cell[1] * cell[2] + p.y * k) / (cell[2] + k); // y
cell[2] += k; // cumulated intensity value
// Join multiple cell values using alpha blending
cell[2] = (cell[2] * (1 - k/max)) + k;
}
}
}
Expand Down