From 7bb6d9ec396aa1cbfb8e0fc820f31471c108d435 Mon Sep 17 00:00:00 2001
From: Bradford Powell <bradford.powell@gmail.com>
Date: Tue, 29 May 2012 12:26:50 -0500
Subject: [PATCH] Avoid division by zero when calculating squishedHeight when
 depth==0

---
 src/org/broad/igv/sam/AlignmentTrack.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/org/broad/igv/sam/AlignmentTrack.java b/src/org/broad/igv/sam/AlignmentTrack.java
index 65a77e317c..1e713e6d5b 100755
--- a/src/org/broad/igv/sam/AlignmentTrack.java
+++ b/src/org/broad/igv/sam/AlignmentTrack.java
@@ -382,7 +382,11 @@ private void renderAlignments(RenderContext context, Rectangle inputRect) {
             if (getDisplayMode() != DisplayMode.EXPANDED) {
                 int visHeight = visibleRect.height;
                 int depth = dataManager.getNLevels();
-                squishedHeight = Math.min(maxSquishedHeight, Math.max(1, Math.min(expandedHeight, visHeight / depth)));
+                if (depth == 0) {
+                    squishedHeight = Math.min(maxSquishedHeight, Math.max(1, expandedHeight));
+                } else {
+                    squishedHeight = Math.min(maxSquishedHeight, Math.max(1, Math.min(expandedHeight, visHeight / depth)));
+                }
                 h = squishedHeight;
             }