X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fgeometry%2Fhyperbox.h;h=b9fad33d620d205f1a5043e002cb88556cbc6e32;hb=818f9df5f383adad815f6f3276bfc1fa30c25681;hp=da500910e4f100d57f865b644bd719d71a3ee34c;hpb=09cc3a8648dd20e9a07d669b353c4a120b67c1c4;p=libs%2Fmath.git

diff --git a/source/geometry/hyperbox.h b/source/geometry/hyperbox.h
index da50091..b9fad33 100644
--- a/source/geometry/hyperbox.h
+++ b/source/geometry/hyperbox.h
@@ -5,10 +5,7 @@
 #include <cmath>
 #include <stdexcept>
 #include <msp/linal/vector.h>
-#include "boundingbox.h"
-#include "ray.h"
 #include "shape.h"
-#include "surfacepoint.h"
 
 namespace Msp {
 namespace Geometry {
@@ -115,13 +112,23 @@ inline unsigned HyperBox<T, D>::get_intersections(const Ray<T, D> &ray, SurfaceP
 			{
 				if(points)
 				{
-					points[n].position = p;
-					points[n].normal = LinAl::Vector<T, D>();
-					points[n].normal[i] = j;
-					points[n].distance = x;
-
-					if(n==1 && x<points[0].distance)
-						std::swap(points[0], points[1]);
+					bool entry = (T(j)*ray.get_direction()[i]<T(0));
+					unsigned k = 0;
+					if(n>0 && entry!=points[0].entry)
+					{
+						if(entry)
+							points[1] = points[0];
+						else
+							++k;
+					}
+					if(k<n && entry==points[k].entry)
+						--n;
+
+					points[k].position = p;
+					points[k].normal = LinAl::Vector<T, D>();
+					points[k].normal[i] = j;
+					points[k].distance = x;
+					points[k].entry = (T(j)*ray.get_direction()[i]<T(0));
 				}
 
 				++n;