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Дата изменения: Fri Sep 11 17:33:25 1998 Дата индексирования: Tue Oct 2 12:45:56 2012 Кодировка: Поисковые слова: astronaut |
#include "WorldOrImageCoords.h" class WorldOrImageCoords { ... public: WorldOrImageCoords(); WorldOrImageCoords(WorldCoords wc); WorldOrImageCoords(ImageCoords ic); isNull() const; void setNull(); friend ostream& operator<<(ostream& os, const WorldOrImageCoords& pos); void print(char* x_buf, char* y_buf, double equinox = 2000., int hmsFlag=1); void print(ostream& os, double equinox = 2000.); void get(double& x, double& y, double equinox = 2000.); int operator==(const WorldOrImageCoords& pos) const; int operator!=(const WorldOrImageCoords& pos) const; friend WorldOrImageCoords operator-(const WorldOrImageCoords& a, const WorldOrImageCoords& b); double ra_deg() const; double dec_deg() const; WorldCoords& wc(); ImageCoords& ic(); const WorldCoords& wc() const const ImageCoords& ic() const; double dist(WorldOrImageCoords& pos, double& pa) const; double dist(WorldOrImageCoords& pos) const; int box(double radius, WorldOrImageCoords& pos1, WorldOrImageCoords& pos2) const; static WorldOrImageCoords center(const WorldOrImageCoords& pos1, const WorldOrImageCoords& pos2, double& radius, double& width, double& height); const HMS& ra() const; const HMS& dec() const; double x() const; double y() const; double isWcs() const; int status() const; };
Class WorldOrImageCoords is designed to be used in situations where you might need to deal with either world coordinates or image coordinates, but don't know ahead of time which. We could use a common base class and virtual methods, but that would require using pointers or references, while it is often more convenient to use instances of these classes. Also, the methods in both classes have slightly different signatures. After initializing the class with with a WorldCoords(n) object or an ImageCoords(n) object, you can use the isWcs() method to check which one it is, if you don't know. Otherwise, most of the methods work transparently, independent of the coordinate type. However, you should not attempt, for example, to fetch the value of "ra" and "dec" without being sure that the object represents world coordinates.
WorldOrImageCoords() Initialize null coordinates. WorldOrImageCoords(wc) Initialize world coordinates. WorldOrImageCoords(ic) Initialize image coordinates.
isNull(); Return true if the coordinates are null setNull() Set to the null value. operator<<(os, pos) Output operator, prints world coordinates as hh:mm:ss dd:mm:ss, image coordinates as x y. print(x_buf, y_buf, equinox, hmsFlag) Print the coordinates to the given buffer. For world coordinates, if hmsFlag is non-zero, prints in H:M:S [+-]D:M:S format, otherwise in decimal degrees. print(os, equinox) Print the coordinates to the given stream. get(x, y, equinox) Get teh valules of x and y in the given equinox. operator==(pos) Check for equality. operator!=(pos) Check for inequality. operator-(a, b) Return the difference between two points. ra_deg() Return ra in degrees. dec_deg() Return dec in degrees. wc() Return the internal WorldCoords class. ic() Return the internal ImageCoords class. dist(pos, pa) Get distance and pa angle between the given point and this point. dist(pos) Get distance between between the given point and this point. box(radius, pos1, pos2) Given a radius, set pos1 and pos2 to the 2 endpoints that form a box with center at this position. center(pos1, pos2, radius, width, height) { Given the endpoints of a box (pos1, pos2), set width, height and radius and return the center position of the box. ra() Return the value of ra. dec() Return the value of dec. x() Return the value of the x coordinate. y() Return the value of the y coordinate. isWcs() Return true if this class represents world coordinates. status() Return the status after the constructor (0 is OK).
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