X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fgeometry%2Fhyperbox.h;h=c3bac57d97e3464d20535a66928106079777801a;hb=a29d2c17ca70a3ed5df1e863c92ccd851d5dba6b;hp=546ad0ec3984c5b338978c23b37f0c8ea5f97533;hpb=7919982691f0b8c69d8bef1bf6471b1e7a312163;p=libs%2Fmath.git

diff --git a/source/geometry/hyperbox.h b/source/geometry/hyperbox.h
index 546ad0e..c3bac57 100644
--- a/source/geometry/hyperbox.h
+++ b/source/geometry/hyperbox.h
@@ -33,6 +33,7 @@ public:
 	virtual bool contains(const LinAl::Vector<T, D> &) const;
 	virtual unsigned get_max_ray_intersections() const { return 2; }
 	virtual unsigned get_intersections(const Ray<T, D> &, SurfacePoint<T, D> *, unsigned) const;
+	virtual Coverage get_coverage(const BoundingBox<T, D> &) const;
 };
 
 template<typename T, unsigned D>
@@ -112,14 +113,23 @@ 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;
-					points[n].entry = (T(j)*ray.get_direction()[i]<T(0));
-
-					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;
@@ -130,6 +140,25 @@ inline unsigned HyperBox<T, D>::get_intersections(const Ray<T, D> &ray, SurfaceP
 	return n;
 }
 
+template<typename T, unsigned D>
+inline Coverage HyperBox<T, D>::get_coverage(const BoundingBox<T, D> &bbox) const
+{
+	const LinAl::Vector<T, D> &min_pt = bbox.get_minimum_point();
+	const LinAl::Vector<T, D> &max_pt = bbox.get_maximum_point();
+	LinAl::Vector<T, D> half_dim = dimensions/T(2);
+
+	Coverage coverage = FULL_COVERAGE;
+	for(unsigned i=0; i<D; ++i)
+	{
+		if(max_pt[i]<-half_dim[i] || min_pt[i]>half_dim[i])
+			return NO_COVERAGE;
+		if(min_pt[i]<-half_dim[i] || max_pt[i]>half_dim[i])
+			coverage = PARTIAL_COVERAGE;
+	}
+
+	return coverage;
+}
+
 } // namespace Geometry
 } // namespace Msp