1 files changed, 9 insertions, 0 deletions
diff --git a/public/assets/js/util/format.js b/public/assets/js/util/format.js
index 7058cea..aac8311 100644
--- a/public/assets/js/util/format.js
+++ b/public/assets/js/util/format.js
@@ -282,9 +282,18 @@ const size_scale = [
 function get_size_opacity(n) {
   return get_scale_opacity(n, size_scale);
 }
+/**
+ * find a value on one axis of an array of points, and return the proportional point
+ * @param  {Array}  value   a value, to be matched on the first column of scale
+ * @param  {Array}  scale   an array of points: (value, target)
+ * @return {Number}  a proportional point within the closest target values
+ */
 function get_scale_opacity(value, scale) {
   for (let i = 1; i < scale.length; i++) {
     const [max_value, max_lerp] = scale[i];
+    if (value === max_value) {
+      return max_lerp;
+    }
     if (value < max_value) {
       const [min_value, min_lerp] = scale[i - 1];
       return lerp(norm(value, min_value, max_value), min_lerp, max_lerp);