From ea43e312e470504f65b17cd03ad7e6356590f804 Mon Sep 17 00:00:00 2001
From: Steven Robertson <steven@strobe.cc>
Date: Sun, 18 Mar 2012 14:58:25 -0700
Subject: [PATCH] Avoid overflow in exponential var.

---
 cuburn/code/variations.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/cuburn/code/variations.py b/cuburn/code/variations.py
index abb70e3..bdd5d40 100644
--- a/cuburn/code/variations.py
+++ b/cuburn/code/variations.py
@@ -172,9 +172,11 @@ var(17, 'popcorn', """
 
 var(18, 'exponential', """
     float dx = w * expf(tx - 1.0f);
-    float dy = M_PI * ty;
-    ox += dx * cosf(dy);
-    oy += dx * sinf(dy);
+    if (isfinite(dx)) {
+        float dy = M_PI * ty;
+        ox += dx * cosf(dy);
+        oy += dx * sinf(dy);
+    }
     """)
 
 var(19, 'power', """