From fd74ea21f55aae52fb60e88185a5a3e8258f0ca0 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Tue, 23 Oct 2007 00:36:45 +0000
Subject: [PATCH] minor optimization?

---
 panda/src/mathutil/boundingBox.cxx | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/panda/src/mathutil/boundingBox.cxx b/panda/src/mathutil/boundingBox.cxx
index a27d5d7a6b..f7c875bb3b 100644
--- a/panda/src/mathutil/boundingBox.cxx
+++ b/panda/src/mathutil/boundingBox.cxx
@@ -596,6 +596,15 @@ contains_box(const BoundingBox *box) const {
 ////////////////////////////////////////////////////////////////////
 int BoundingBox::
 contains_hexahedron(const BoundingHexahedron *hexahedron) const {
+  // First, try the quick bounding-box test.  If that's decisive,
+  // we'll accept it.
+  int result = contains_finite(hexahedron);
+  if (result == IF_no_intersection || ((result & IF_all) != 0)) {
+    return result;
+  }
+
+  // If that was inconclusive, we'll look more closely with the
+  // somewhat more expensive reverse answer.
   return hexahedron->contains_box(this) & ~IF_all;
 }