LSSTApplications  20.0.0
LSSTDataManagementBasePackage
Relationship.h
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22 
23 #ifndef LSST_SPHGEOM_RELATIONSHIP_H_
24 #define LSST_SPHGEOM_RELATIONSHIP_H_
25 
26 #include <bitset>
27 
30 
31 namespace lsst {
32 namespace sphgeom {
33 
36 
38 static constexpr Relationship DISJOINT(1);
39 
44 static constexpr Relationship INTERSECTS(0);
45 
47 static constexpr Relationship CONTAINS(2);
48 
50 static constexpr Relationship WITHIN(4);
51 
56  // If A is disjoint from B, then B is disjoint from A. But if A contains B
57  // then B is within A, so the corresponding bits must be swapped.
58  return (r & DISJOINT) | ((r & CONTAINS) << 1) | ((r & WITHIN) >> 1);
59 }
60 
61 }} // namespace lsst::sphgeom
62 
63 #endif // LSST_SPHGEOM_RELATIONSHIP_H_
std::bitset
STL class.
lsst
A base class for image defects.
Definition: imageAlgorithm.dox:1
lsst::sphgeom::invert
Relationship invert(Relationship r)
Given the relationship between two sets A and B (i.e.
Definition: Relationship.h:55