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#if !defined( ELLIPSE_INCLUDED ) /* Include this file only once */
#define ELLIPSE_INCLUDED
/*
*+
* Name:
* ellipse.h
* Type:
* C include file.
* Purpose:
* Define the interface to the Ellipse class.
* Invocation:
* #include "ellipse.h"
* Description:
* This include file defines the interface to the Ellipse class and
* provides the type definitions, function prototypes and macros,
* etc. needed to use this class.
*
* The Ellipse class implement a Region which represents a simple interval
* on each axis of the encapsulated Frame
* Inheritance:
* The Ellipse class inherits from the Region class.
* Feature Test Macros:
* astCLASS
* If the astCLASS macro is undefined, only public symbols are
* made available, otherwise protected symbols (for use in other
* class implementations) are defined. This macro also affects
* the reporting of error context information, which is only
* provided for external calls to the AST library.
* Copyright:
* Copyright (C) 1997-2006 Council for the Central Laboratory of the
* Research Councils
* Licence:
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
* Authors:
* DSB: David S. Berry (Starlink)
* History:
* 7-SEP-2004 (DSB):
* Original version.
*-
*/
/* Include files. */
/* ============== */
/* Interface definitions. */
/* ---------------------- */
#include "region.h" /* Coordinate regions (parent class) */
#if defined(astCLASS) /* Protected */
#include "channel.h" /* I/O channels */
#endif
/* C header files. */
/* --------------- */
#if defined(astCLASS) /* Protected */
#include <stddef.h>
#endif
/* Macros */
/* ====== */
/* Define a dummy __attribute__ macro for use on non-GNU compilers. */
#ifndef __GNUC__
# define __attribute__(x) /*NOTHING*/
#endif
/* Type Definitions. */
/* ================= */
/* Ellipse structure. */
/* ------------------ */
/* This structure contains all information that is unique to each object in
the class (e.g. its instance variables). */
typedef struct AstEllipse {
/* Attributes inherited from the parent class. */
AstRegion region; /* Parent class structure */
/* Attributes specific to objects in this class. */
double *centre; /* Ellipse centre coords */
double *point1; /* Point at end of primary axis */
double angle; /* Orientation of primary axis */
double a; /* Half-length of primary axis */
double b; /* Half-length of secondary axis */
double lbx; /* Lower x limit of mesh bounding box */
double ubx; /* Upper y limit of mesh bounding box */
double lby; /* Lower x limit of mesh bounding box */
double uby; /* Upper y limit of mesh bounding box */
int stale; /* Is cached information stale? */
} AstEllipse;
/* Virtual function table. */
/* ----------------------- */
/* This table contains all information that is the same for all
objects in the class (e.g. pointers to its virtual functions). */
#if defined(astCLASS) /* Protected */
typedef struct AstEllipseVtab {
/* Properties (e.g. methods) inherited from the parent class. */
AstRegionVtab region_vtab; /* Parent class virtual function table */
/* A Unique identifier to determine class membership. */
AstClassIdentifier id;
/* Properties (e.g. methods) specific to this class. */
void (* EllipsePars)( AstEllipse *, double[2], double *, double *, double *, double[2], double[2], int * );
} AstEllipseVtab;
#if defined(THREAD_SAFE)
/* Define a structure holding all data items that are global within the
object.c file. */
typedef struct AstEllipseGlobals {
AstEllipseVtab Class_Vtab;
int Class_Init;
} AstEllipseGlobals;
/* Thread-safe initialiser for all global data used by this module. */
void astInitEllipseGlobals_( AstEllipseGlobals * );
#endif
#endif
/* Function prototypes. */
/* ==================== */
/* Prototypes for standard class functions. */
/* ---------------------------------------- */
astPROTO_CHECK(Ellipse) /* Check class membership */
astPROTO_ISA(Ellipse) /* Test class membership */
/* Constructor. */
#if defined(astCLASS) /* Protected. */
AstEllipse *astEllipse_( void *, int, const double[2], const double[2], const double[2], AstRegion *, const char *, int *, ...);
#else
AstEllipse *astEllipseId_( void *, int, const double[2], const double[2], const double[2], AstRegion *, const char *, ... )__attribute__((format(printf,7,8)));
#endif
#if defined(astCLASS) /* Protected */
/* Initialiser. */
AstEllipse *astInitEllipse_( void *, size_t, int, AstEllipseVtab *,
const char *, AstFrame *, int, const double[2],
const double[2], const double[2], AstRegion *, int * );
/* Vtab initialiser. */
void astInitEllipseVtab_( AstEllipseVtab *, const char *, int * );
/* Loader. */
AstEllipse *astLoadEllipse_( void *, size_t, AstEllipseVtab *,
const char *, AstChannel *, int * );
#endif
/* Prototypes for member functions. */
/* -------------------------------- */
void astEllipsePars_( AstEllipse *, double[2], double *, double *, double *, double[2], double[2], int * );
# if defined(astCLASS) /* Protected */
AstRegion *astBestEllipse_( AstPointSet *, double *, AstRegion *, int * );
#endif
/* Function interfaces. */
/* ==================== */
/* These macros are wrap-ups for the functions defined by this class
to make them easier to invoke (e.g. to avoid type mis-matches when
passing pointers to objects from derived classes). */
/* Interfaces to standard class functions. */
/* --------------------------------------- */
/* Some of these functions provide validation, so we cannot use them
to validate their own arguments. We must use a cast when passing
object pointers (so that they can accept objects from derived
classes). */
/* Check class membership. */
#define astCheckEllipse(this) astINVOKE_CHECK(Ellipse,this,0)
#define astVerifyEllipse(this) astINVOKE_CHECK(Ellipse,this,1)
/* Test class membership. */
#define astIsAEllipse(this) astINVOKE_ISA(Ellipse,this)
/* Constructor. */
#if defined(astCLASS) /* Protected. */
#define astEllipse astINVOKE(F,astEllipse_)
#else
#define astEllipse astINVOKE(F,astEllipseId_)
#endif
#if defined(astCLASS) /* Protected */
/* Initialiser. */
#define astInitEllipse(mem,size,init,vtab,name,frame,form,p1,p2,p3,unc) \
astINVOKE(O,astInitEllipse_(mem,size,init,vtab,name,frame,form,p1,p2,p3,unc,STATUS_PTR))
/* Vtab Initialiser. */
#define astInitEllipseVtab(vtab,name) astINVOKE(V,astInitEllipseVtab_(vtab,name,STATUS_PTR))
/* Loader. */
#define astLoadEllipse(mem,size,vtab,name,channel) \
astINVOKE(O,astLoadEllipse_(mem,size,vtab,name,astCheckChannel(channel),STATUS_PTR))
#endif
/* Interfaces to public member functions. */
/* -------------------------------------- */
/* Here we make use of astCheckEllipse to validate Ellipse pointers
before use. This provides a contextual error report if a pointer
to the wrong sort of Object is supplied. */
#define astEllipsePars(this,centre,a,b,angle,p1,p2) \
astINVOKE(V,astEllipsePars_(astCheckEllipse(this),centre,a,b,angle,p1,p2,STATUS_PTR))
#if defined(astCLASS) /* Protected */
#define astBestEllipse(pset,cen,unc) astBestEllipse_(pset,cen,unc,STATUS_PTR)
#endif
#endif
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