From 7223cd2a80ae71478cc82e6da56b84044935bf6a Mon Sep 17 00:00:00 2001
From: Kimberly Meechan <24316371+K-Meech@users.noreply.github.com>
Date: Thu, 2 Oct 2025 19:57:02 +0100
Subject: [PATCH] avoid negative array size in makeLine

---
 src/main/java/ij3d/shapes/BoundingBox.java | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/main/java/ij3d/shapes/BoundingBox.java b/src/main/java/ij3d/shapes/BoundingBox.java
index b9be432..e9174c9 100644
--- a/src/main/java/ij3d/shapes/BoundingBox.java
+++ b/src/main/java/ij3d/shapes/BoundingBox.java
@@ -198,12 +198,18 @@ private Appearance createAppearance(final Color3f color) {
 
 	private Geometry makeLine(final Point3f start, final Point3f end,
 		final Color3f color, final float tickDistance, final float first,
-		final float tickSize, final boolean noTicks)
+		final float tickSize, boolean noTicks)
 	{
 		final float lineLength = start.distance(end);
 		final int nTicks =
 			(int) Math.floor((lineLength - first) / tickDistance) + 1;
 
+		// Avoid negative array size. This occurs when the (lineLength - first)
+		// is negative.
+		if (nTicks < 1) {
+			noTicks = true;
+		}
+
 		final int n = noTicks ? 2 : nTicks * 6 + 2;
 
 		final Point3f[] coords = new Point3f[n];