X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;ds=sidebyside;f=source%2Fgeometry%2Fhypersphere.h;h=8f21db1d78f40689cda50c40d7ccd18cb3aa93b8;hb=a29d2c17ca70a3ed5df1e863c92ccd851d5dba6b;hp=6bb4352f4016840ca331ebfd2034f35a7090e7d2;hpb=7de28b9c89ca4554f5c12746f481f5b385529479;p=libs%2Fmath.git

diff --git a/source/geometry/hypersphere.h b/source/geometry/hypersphere.h
index 6bb4352..8f21db1 100644
--- a/source/geometry/hypersphere.h
+++ b/source/geometry/hypersphere.h
@@ -31,6 +31,7 @@ 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>
@@ -95,6 +96,41 @@ inline unsigned HyperSphere<T, D>::get_intersections(const Ray<T, D> &ray, Surfa
 	return n;
 }
 
+template<typename T, unsigned D>
+inline Coverage HyperSphere<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> far_point;
+	for(unsigned i=0; i<D; ++i)
+		far_point[i] = std::max(std::abs(min_pt[i]), std::abs(max_pt[i]));
+
+	if(contains(far_point))
+		return FULL_COVERAGE;
+
+	unsigned spanned_dimensions = 0;
+	for(unsigned i=0; i<D; ++i)
+		if(min_pt[i]<T(0) && max_pt[i]>T(0))
+			spanned_dimensions |= 1<<i;
+
+	for(unsigned i=0; i<(1<<D); ++i)
+	{
+		if(i&spanned_dimensions)
+			continue;
+
+		LinAl::Vector<T, D> point;
+		for(unsigned j=0; j<D; ++j)
+			if(!((spanned_dimensions>>j)&1))
+				point[j] = ((i>>j)&1 ? max_pt[j] : min_pt[j]);
+
+		if(contains(point))
+			return PARTIAL_COVERAGE;
+	}
+
+	return NO_COVERAGE;
+}
+
 } // namespace Geometry
 } // namespace Msp