From 693fea52bca91d5c84747d04e8da7fe617f45c17 Mon Sep 17 00:00:00 2001
From: sgold <sgold@sonic.net>
Date: Fri, 14 Mar 2014 04:47:38 +0000
Subject: [PATCH] Bugfix:  issue #622  (FlybyCamera zooms to negative FOV) in
 trunk

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@11082 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
---
 engine/src/core/com/jme3/input/FlyByCamera.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/engine/src/core/com/jme3/input/FlyByCamera.java b/engine/src/core/com/jme3/input/FlyByCamera.java
index 04b323f95..b759833d9 100644
--- a/engine/src/core/com/jme3/input/FlyByCamera.java
+++ b/engine/src/core/com/jme3/input/FlyByCamera.java
@@ -341,7 +341,11 @@ public class FlyByCamera implements AnalogListener, ActionListener {
 
         float fovY = FastMath.atan(h / near)
                   / (FastMath.DEG_TO_RAD * .5f);
-        fovY += value * 0.1f * zoomSpeed;
+        float newFovY = fovY + value * 0.1f * zoomSpeed;
+        if (newFovY > 0f) {
+            // Don't let the FOV go zero or negative.
+            fovY = newFovY;
+        }
 
         h = FastMath.tan( fovY * FastMath.DEG_TO_RAD * .5f) * near;
         w = h * aspect;