cleanup alt handling

zhhhc · Nov 25, 2014 · 6c88b34 · 6c88b34
1 parent 7f79ffe
commit 6c88b34
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/HeatLayer.js b/src/HeatLayer.js
@@ -142,7 +142,9 @@ L.HeatLayer = (L.Layer ? L.Layer : L.Class).extend({
                 x = Math.floor((p.x - offsetX) / cellSize) + 2;
                 y = Math.floor((p.y - offsetY) / cellSize) + 2;
 
-                var alt = isNaN(this._latlngs[i].alt) ? (isNaN(this._latlngs[i][2]) ? 1 : this._latlngs[i][2]) : this._latlngs[i].alt
+                var alt =
+                    this._latlngs[i].alt !== undefined ? this._latlngs[i].alt :
+                    this._latlngs[i][2] !== undefined ? +this._latlngs[i][2] : 1;
                 k = alt * v;
 
                 grid[y] = grid[y] || [];