blender-archive/source/blender/blenlib/BLI_rect.h

/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 *
 */

#ifndef __BLI_RECT_H__
#define __BLI_RECT_H__

/** \file BLI_rect.h
 *  \ingroup bli
 */

struct rctf;
struct rcti;

#ifdef __cplusplus
extern "C" {
#endif

int  BLI_rcti_is_empty(const struct rcti *rect);
int  BLI_rctf_is_empty(const struct rctf *rect);
void BLI_rctf_init(struct rctf *rect, float xmin, float xmax, float ymin, float ymax);
void BLI_rcti_init(struct rcti *rect, int xmin, int xmax, int ymin, int ymax);
void BLI_rcti_init_minmax(struct rcti *rect);
void BLI_rctf_init_minmax(struct rctf *rect);
void BLI_rcti_do_minmax_v(struct rcti *rect, const int xy[2]);
void BLI_rctf_do_minmax_v(struct rctf *rect, const float xy[2]);

void BLI_rctf_translate(struct rctf *rect, float x, float y);
void BLI_rcti_translate(struct rcti *rect, int x, int y);
void BLI_rcti_resize(struct rcti *rect, int x, int y);
void BLI_rctf_resize(struct rctf *rect, float x, float y);
void BLI_rctf_interp(struct rctf *rect, const struct rctf *rect_a, const struct rctf *rect_b, const float fac);
//void BLI_rcti_interp(struct rctf *rect, struct rctf *rect_a, struct rctf *rect_b, float fac);
int  BLI_rctf_compare(const struct rctf *rect_a, const struct rctf *rect_b, const float limit);
int  BLI_rcti_compare(const struct rcti *rect_a, const struct rcti *rect_b);
int  BLI_rctf_isect(const struct rctf *src1, const struct rctf *src2, struct rctf *dest);
int  BLI_rcti_isect(const struct rcti *src1, const struct rcti *src2, struct rcti *dest);
int  BLI_rcti_isect_pt(const struct rcti *rect, const int x, const int y);
int  BLI_rcti_isect_pt_v(const struct rcti *rect, const int xy[2]);
int  BLI_rctf_isect_pt(const struct rctf *rect, const float x, const float y);
int  BLI_rctf_isect_pt_v(const struct rctf *rect, const float xy[2]);
int  BLI_rcti_isect_segment(const struct rcti *rect, const int s1[2], const int s2[2]);
#if 0 /* NOT NEEDED YET */
int  BLI_rctf_isect_segment(struct rcti *rect, int s1[2], int s2[2]);
#endif
void BLI_rctf_union(struct rctf *rctf1, const struct rctf *rctf2);
void BLI_rcti_union(struct rcti *rcti1, const struct rcti *rcti2);
void BLI_rcti_rctf_copy(struct rcti *dst, const struct rctf *src);
void BLI_rctf_rcti_copy(struct rctf *dst, const struct rcti *src);

void print_rctf(const char *str, const struct rctf *rect);
void print_rcti(const char *str, const struct rcti *rect);

#define BLI_RCT_SIZE_X(rct)       ((rct)->xmax - (rct)->xmin)
#define BLI_RCT_SIZE_Y(rct)       ((rct)->ymax - (rct)->ymin)

#define BLI_RCT_CENTER_X(rct)     (((rct)->xmin + (rct)->xmax) / 2)
#define BLI_RCT_CENTER_Y(rct)     (((rct)->ymin + (rct)->ymax) / 2)

#define BLI_RCT_CENTER_X_FL(rct)  ((float)((rct)->xmin + (rct)->xmax) / 2.0f)
#define BLI_RCT_CENTER_Y_FL(rct)  ((float)((rct)->ymin + (rct)->ymax) / 2.0f)

#ifdef __cplusplus
}
#endif

#endif  /* __BLI_RECT_H__ */