X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fgeometry%2Fextrudedshape.h;h=e702f90a7a0f844d93f417b53d38a8c6aea2359a;hb=a29d2c17ca70a3ed5df1e863c92ccd851d5dba6b;hp=a62aa9a311e88bf09dd9fa5d480b425baaf38758;hpb=7919982691f0b8c69d8bef1bf6471b1e7a312163;p=libs%2Fmath.git

diff --git a/source/geometry/extrudedshape.h b/source/geometry/extrudedshape.h
index a62aa9a..e702f90 100644
--- a/source/geometry/extrudedshape.h
+++ b/source/geometry/extrudedshape.h
@@ -35,6 +35,7 @@ public:
 	virtual bool contains(const LinAl::Vector<T, D> &) const;
 	virtual unsigned get_max_ray_intersections() const;
 	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>
@@ -116,7 +117,7 @@ inline unsigned ExtrudedShape<T, D>::get_intersections(const Ray<T, D> &ray, Sur
 	{
 		T offset = T();
 		T limit = T();
-		if(ray.get_direction()[D-1]!=T(0))
+		if(ray_direction[D-1]!=T(0))
 		{
 			offset = (half_length-ray_start[D-1])/ray_direction[D-1];
 			limit = (-half_length-ray_start[D-1])/ray_direction[D-1];
@@ -157,7 +158,7 @@ inline unsigned ExtrudedShape<T, D>::get_intersections(const Ray<T, D> &ray, Sur
 
 	/* If the ray is not parallel to the base space, it may pass through the
 	caps. */
-	if(n<size && ray_direction[D-1])
+	if(n<size && ray_direction[D-1]!=T(0))
 	{
 		for(int i=-1; (n<size && i<=1); i+=2)
 		{
@@ -187,6 +188,24 @@ inline unsigned ExtrudedShape<T, D>::get_intersections(const Ray<T, D> &ray, Sur
 	return n;
 }
 
+template<typename T, unsigned D>
+inline Coverage ExtrudedShape<T, D>::get_coverage(const BoundingBox<T, D> &bbox) const
+{
+	T half_length = length/T(2);
+	if(bbox.get_maximum_coordinate(D-1)<-half_length || bbox.get_minimum_coordinate(D-1)>half_length)
+		return NO_COVERAGE;
+
+	BoundingBox<T, D-1> base_bbox(bbox.get_minimum_point().template slice<D-1>(0), bbox.get_maximum_point().template slice<D-1>(0));
+	Coverage coverage = base->get_coverage(base_bbox);
+	if(coverage==NO_COVERAGE)
+		return NO_COVERAGE;
+
+	if(bbox.get_minimum_coordinate(D-1)<-half_length || bbox.get_maximum_coordinate(D-1)>half_length)
+		return PARTIAL_COVERAGE;
+	else
+		return coverage;
+}
+
 } // namespace Geometry
 } // namespace Msp