template<typename T, unsigned D>
inline Coverage TransformedShape<T, D>::get_coverage(const BoundingBox<T, D> &bbox) const
{
- return shape->get_coverage(inverse_trans.transform(bbox));
+ BoundingBox<T, D> local_bbox = inverse_trans.transform(bbox);
+ Coverage coverage = shape->get_coverage(local_bbox);
+ if(coverage==PARTIAL_COVERAGE)
+ {
+ BoundingBox<T, D> outer_bbox = transformation.transform(local_bbox);
+ LinAl::Vector<T, D> min_pt = local_bbox.get_minimum_point();
+ LinAl::Vector<T, D> max_pt = local_bbox.get_maximum_point();
+ for(unsigned i=0; i<D; ++i)
+ {
+ T scale_ratio = (1-bbox.get_dimension(i)/outer_bbox.get_dimension(i))*local_bbox.get_dimension(i);
+ T low_gap = bbox.get_minimum_coordinate(i)-outer_bbox.get_minimum_coordinate(i);
+ T high_gap = outer_bbox.get_maximum_coordinate(i)-bbox.get_maximum_coordinate(i);
+ min_pt[i] += low_gap*scale_ratio;
+ max_pt[i] -= high_gap-scale_ratio;
+ }
+
+ local_bbox = BoundingBox<T, D>(min_pt, max_pt);
+ if(shape->get_coverage(local_bbox)>=PARTIAL_COVERAGE)
+ return PARTIAL_COVERAGE;
+ else
+ return UNCERTAIN_COVERAGE;
+ }
+ else
+ return coverage;
}
} // namespace Geometry