From 04d5903f575e569baad8c6c46a89d02292e06811 Mon Sep 17 00:00:00 2001
From: curaga <curaga@178a84e3-b1eb-0310-8ba1-8eac791a3b58>
Date: Mon, 12 Aug 2013 12:46:10 +0000
Subject: [PATCH] irr: aabbox intersection support

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@13465 178a84e3-b1eb-0310-8ba1-8eac791a3b58
---
 lib/irrlicht/changes.stk        |  1 +
 lib/irrlicht/include/aabbox3d.h | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/lib/irrlicht/changes.stk b/lib/irrlicht/changes.stk
index 22f21c60d..8979ca204 100644
--- a/lib/irrlicht/changes.stk
+++ b/lib/irrlicht/changes.stk
@@ -7,3 +7,4 @@ The following changes have been made:
 - skies respect Z
 - partial backport to expose setCurrentRendertime in the scene mgr
 - a workaround for every other RTTs flipping
+- aabbox intersection support
diff --git a/lib/irrlicht/include/aabbox3d.h b/lib/irrlicht/include/aabbox3d.h
index afaf12dcd..bdcae4803 100644
--- a/lib/irrlicht/include/aabbox3d.h
+++ b/lib/irrlicht/include/aabbox3d.h
@@ -245,6 +245,25 @@ class aabbox3d
 					(T)(line.getLength() * 0.5));
 		}
 
+		//! Returns the intersection of this box with another, if possible.
+		aabbox3d<T> intersect(const aabbox3d<T>& other) const
+		{
+			aabbox3d<T> out;
+
+			if (!intersectsWithBox(other))
+				return out;
+
+			out.MaxEdge.X = min_(MaxEdge.X, other.MaxEdge.X);
+			out.MaxEdge.Y = min_(MaxEdge.Y, other.MaxEdge.Y);
+			out.MaxEdge.Z = min_(MaxEdge.Z, other.MaxEdge.Z);
+
+			out.MinEdge.X = max_(MinEdge.X, other.MinEdge.X);
+			out.MinEdge.Y = max_(MinEdge.Y, other.MinEdge.Y);
+			out.MinEdge.Z = max_(MinEdge.Z, other.MinEdge.Z);
+
+			return out;
+		}
+
 		//! Tests if the box intersects with a line
 		/** \param linemiddle Center of the line.
 		\param linevect Vector of the line.