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Clamp opacity value to (0, 1)

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Frederic Junod
2014-03-27 08:56:38 +01:00
parent 0461901a86
commit 0043e39ee3
1 changed files with 2 additions and 1 deletions
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src/ol/layer/heatmaplayer.js
+2 -1
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@@ -4,6 +4,7 @@ goog.require('goog.asserts');
goog.require('goog.dom'); goog.require('goog.dom');
goog.require('goog.dom.TagName'); goog.require('goog.dom.TagName');
goog.require('goog.events'); goog.require('goog.events');
goog.require('goog.math');
goog.require('ol.Object'); goog.require('ol.Object');
goog.require('ol.layer.Vector'); goog.require('ol.layer.Vector');
goog.require('ol.render.EventType'); goog.require('ol.render.EventType');
@@ -68,7 +69,7 @@ ol.layer.Heatmap = function(opt_options) {
this.setStyle(function(feature, resolution) { this.setStyle(function(feature, resolution) {
var weight = weightFunction(feature); var weight = weightFunction(feature);
var opacity = goog.isDef(weight) ? weight : 1; var opacity = goog.math.clamp(goog.isDef(weight) ? weight : 1, 0, 1);
// cast to 8 bits // cast to 8 bits
var index = (255 * opacity) | 0; var index = (255 * opacity) | 0;
var style = styleCache[index]; var style = styleCache[index];