From 3348733034339133e453294c1df5a85327d1bcec Mon Sep 17 00:00:00 2001
From: Mike Bostock <mbostock@gmail.com>
Date: Mon, 11 Mar 2019 10:31:09 -0700
Subject: [PATCH] Tweak cooling.

---
 src/sankey.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/sankey.js b/src/sankey.js
index 2e0f4ef..a6240be 100644
--- a/src/sankey.js
+++ b/src/sankey.js
@@ -229,8 +229,8 @@ export default function Sankey() {
     const columns = computeNodeLayers(graph);
     initializeNodeBreadths(columns);
     for (let i = 0; i < iterations; ++i) {
-      const alpha = Math.pow(0.99, i);
-      const beta = (i + 1) / iterations;
+      const beta = ((i + 1) / iterations) ** 1.5;
+      const alpha = 1 - beta;
       relaxRightToLeft(columns, alpha, beta);
       relaxLeftToRight(columns, alpha, beta);
     }