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/*
Copyright (C) 2017-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/
/*
WARNING: This file was generated by the dkct program (see
http://dktools.sourceforge.net/ for details).
Changes you make here will be lost if dkct is run again!
You should modify the original source and run dkct on it.
Original source: dk4bb.ctr
*/
#ifndef DK4BB_H_INCLUDED
/** Avoid multiple inclusions. */
#define DK4BB_H_INCLUDED 1
#line 9 "dk4bb.ctr"
/** @file dk4bb.h Bounding box for drawing operations.
*/
#ifndef DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif
#ifndef DK4TYPES_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4types.h"
#else
#include <dktools-4/dk4types.h>
#endif
#endif
/** Bounding box.
*/
typedef struct {
double xmin; /**< Minimum x value. */
double xmax; /**< Maximum x value. */
double ymin; /**< Minimum y value. */
double ymax; /**< Maximum y value. */
unsigned char fl; /**< Flags: Have x (bit 0), have y (bit 1). */
} dk4_bb_t;
#ifdef __cplusplus
extern "C" {
#endif
/** Initialize bounding box.
@param bbptr Bounding box to initialize.
*/
void
dk4bb_init(
dk4_bb_t *bbptr
);
/** Add x coordinate to bounding box.
@param bbptr Bounding box to modify.
@param x Coordinate value to add.
*/
void
dk4bb_add_x(
dk4_bb_t *bbptr,
double x
);
/** Add y coordinate to bounding box.
@param bbptr Bounding box to modify.
@param y Coordinate value to add.
*/
void
dk4bb_add_y(
dk4_bb_t *bbptr,
double y
);
/** Add point to bounding box.
@param bbptr Bounding box to modify.
@param x X coordinate of point.
@param y Y coordinate of point.
*/
void
dk4bb_add_point(
dk4_bb_t *bbptr,
double x,
double y
);
/** Add Bezier spline segment to bounding box.
@param bbptr Bounding box to modify.
@param x0 Start point, x coordinate.
@param y0 Start point, y coordinate.
@param c0x Control point next to start point, x coordinate.
@param c0y Control point next to start point, y coordinate.
@param c1x Control point next to end point, x coordinate.
@param c1y Control point next to end point, y coordinate.
@param x1 End point, x coordinate.
@param y1 End point, y coordinate.
*/
void
dk4bb_add_bezier(
dk4_bb_t *bbptr,
double x0,
double y0,
double c0x,
double c0y,
double c1x,
double c1y,
double x1,
double y1
);
/** Add bounding box for a rotated ellipse.
@param bbptr Bounding box to modify.
@param xc Center point x coordinate.
@param yc Center point y coordinate.
@param rx X radius.
@param ry Y radius.
@param rot Rotation counterclockwise in radians.
*/
void
dk4bb_add_rotated_ellipse(
dk4_bb_t *bbptr,
double xc,
double yc,
double rx,
double ry,
double rot
);
/** Add one bounding box to another one.
@param pdest Destination bounding box.
@param psrc Source bounding box.
*/
void
dk4bb_add_bb(
dk4_bb_t *pdest,
dk4_bb_t const *psrc
);
/** Check whether an x value is saved in the bounding box.
@param bbptr Bounding box to query.
@return 1 if x value available, 0 otherwise.
*/
int
dk4bb_have_x(
const dk4_bb_t *bbptr
);
/** Check whether an y value is saved in the bounding box.
@param bbptr Bounding box to query.
@return 1 if y value available, 0 otherwise.
*/
int
dk4bb_have_y(
const dk4_bb_t *bbptr
);
/** Retrieve minimum x value.
@param bbptr Bounding box to query.
@return Minimum x value saved in the bounding box.
*/
double
dk4bb_get_xmin(
const dk4_bb_t *bbptr
);
/** Retrieve maximum x value.
@param bbptr Bounding box to query.
@return Maximum x value saved in the bounding box.
*/
double
dk4bb_get_xmax(
const dk4_bb_t *bbptr
);
/** Retrieve minimum y value.
@param bbptr Bounding box to query.
@return Minimum y value saved in the bounding box.
*/
double
dk4bb_get_ymin(
const dk4_bb_t *bbptr
);
/** Retrieve maximum y value.
@param bbptr Bounding box to query.
@return Maximum y value saved in the bounding box.
*/
double
dk4bb_get_ymax(
const dk4_bb_t *bbptr
);
/** Check whether an outer box contains an inner box candidate.
Both boxes must have both x and y information.
@param pouter Outer box.
@param pinner Inner box candidate.
@param aborder Flag: Allow overlapping borders.
@return 1 if pouter contains pinner, 0 otherwise.
*/
int
dk4bb_contains_bb(
const dk4_bb_t *pouter,
const dk4_bb_t *pinner,
int aborder
);
#ifdef __cplusplus
}
#endif
/* vim: set ai sw=4 ts=4 : */
#endif
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