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- /* Point.c -- implementation of X-Y coordinates
-
- THIS SOFTWARE FITS THE DESCRIPTION IN THE U.S. COPYRIGHT ACT OF A
- "UNITED STATES GOVERNMENT WORK". IT WAS WRITTEN AS A PART OF THE
- AUTHOR'S OFFICIAL DUTIES AS A GOVERNMENT EMPLOYEE. THIS MEANS IT
- CANNOT BE COPYRIGHTED. THIS SOFTWARE IS FREELY AVAILABLE TO THE
- PUBLIC FOR USE WITHOUT A COPYRIGHT NOTICE, AND THERE ARE NO
- RESTRICTIONS ON ITS USE, NOW OR SUBSEQUENTLY.
-
- Author:
- K. E. Gorlen
- Bg. 12A, Rm. 2033
- Computer Systems Laboratory
- Division of Computer Research and Technology
- National Institutes of Health
- Bethesda, Maryland 20892
- Phone: (301) 496-1111
- uucp: uunet!nih-csl!kgorlen
- Internet: kgorlen@alw.nih.gov
- August, 1985
-
- Function:
-
- A Point represents an x-y coordinate pair. By convention, Point(0,0) is
- the top left corner of the display, with x increasing to the right and y
- increasing to the bottom.
-
- $Log: Point.c,v $
- * Revision 3.0 90/05/20 00:20:45 kgorlen
- * Release for 1st edition.
- *
- */
-
- #include "Point.h"
- #include "nihclIO.h"
-
- #define THIS Point
- #define BASE Object
- #define BASE_CLASSES BASE::desc()
- #define MEMBER_CLASSES
- #define VIRTUAL_BASE_CLASSES Object::desc()
-
- DEFINE_CLASS(Point,1,"$Header: /afs/alw.nih.gov/unix/sun4_40c/usr/local/src/nihcl-3.0/share/lib/RCS/Point.c,v 3.0 90/05/20 00:20:45 kgorlen Rel $",NULL,NULL);
-
- Point Point::max(const Point& p) const
- {
- return Point(MAX(xc,p.xc),MAX(yc,p.yc));
- }
-
- Point Point::min(const Point& p) const
- {
- return Point(MIN(xc,p.xc),MIN(yc,p.yc));
- }
-
- bool Point::isEqual(const Object& ob) const
- {
- return ob.isSpecies(classDesc) && *this==castdown(ob);
- }
-
- const Class* Point::species() const { return &classDesc; }
-
- unsigned Point::hash() const { return xc^yc; }
-
- int Point::compare(const Object& ob) const
- {
- assertArgSpecies(ob,classDesc,"compare");
- const Point& p = castdown(ob);
- int t = yc - p.yc;;
- if (t != 0) return t;
- else return xc - p.xc;
- }
-
- void Point::deepenShallowCopy() {}
-
- void Point::printOn(ostream& strm) const
- {
- strm << '(' << xc << ',' << yc << ')';
- }
-
- Point::Point(OIOin& strm)
- : BASE(strm)
- {
- strm >> xc >> yc;
- }
-
- void Point::storer(OIOout& strm) const
- {
- BASE::storer(strm);
- strm << xc << yc;
- }
-
- Point::Point(OIOifd& fd)
- : BASE(fd)
- {
- fd >> xc >> yc;
- }
-
- void Point::storer(OIOofd& fd) const
- {
- BASE::storer(fd);
- fd << xc << yc;
- }
-