/******************************************************************************
 *
 * File:         outlines.h
 * Description:  Combinatorial Splitter
 * Author:       Mark Seaman, OCR Technology
 *
 * (c) Copyright 1989, Hewlett-Packard Company.
 ** Licensed under the Apache License, Version 2.0 (the "License");
 ** you may not use this file except in compliance with the License.
 ** You may obtain a copy of the License at
 ** http://www.apache.org/licenses/LICENSE-2.0
 ** Unless required by applicable law or agreed to in writing, software
 ** distributed under the License is distributed on an "AS IS" BASIS,
 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 ** See the License for the specific language governing permissions and
 ** limitations under the License.
 *
 *****************************************************************************/

#ifndef OUTLINES_H
#define OUTLINES_H

#include <cmath>     // for abs
#include "blobs.h"   // for TPOINT
#include "params.h"  // for IntParam
#include "wordrec.h" // for Wordrec

/*----------------------------------------------------------------------
              C o n s t a n t s
----------------------------------------------------------------------*/
#define LARGE_DISTANCE 100000 /* Used for closest dist */
#define MIN_BLOB_SIZE 10      /* Big units */
#define MAX_ASPECT_RATIO 2.5  /* Widest character */

/*----------------------------------------------------------------------
              M a c r o s
----------------------------------------------------------------------*/
/**********************************************************************
 * same_point
 *
 * Return true if the point values are the same. The parameters must
 * be of type POINT.
 **********************************************************************/
#define same_point(p1, p2) \
  ((abs(p1.x - p2.x) < chop_same_distance) && (abs(p1.y - p2.y) < chop_same_distance))

/**********************************************************************
 * dist_square
 *
 * Return the square of the distance between these two points.  The
 * parameters must be of type POINT.
 **********************************************************************/

#define dist_square(p1, p2) ((p2.x - p1.x) * (p2.x - p1.x) + (p2.y - p1.y) * (p2.y - p1.y))

/**********************************************************************
 * closest
 *
 * The expression provides the EDGEPT that is closest to the point in
 * question.  All three parameters must be of type EDGEPT.
 **********************************************************************/

#define closest(test_p, p1, p2)                                                                   \
  (p1 ? (p2 ? ((dist_square(test_p->pos, p1->pos) < dist_square(test_p->pos, p2->pos)) ? p1 : p2) \
            : p1)                                                                                 \
      : p2)

/**********************************************************************
 * edgept_dist
 *
 * Return the distance (squared) between the two edge points.
 **********************************************************************/

#define edgept_dist(p1, p2) (dist_square((p1)->pos, (p2)->pos))

/**********************************************************************
 * is_exterior_point
 *
 * Return true if the point supplied is an exterior projection from the
 * outline.
 **********************************************************************/

#define is_exterior_point(edge, point)                                                   \
  (same_point(edge->prev->pos, point->pos) || same_point(edge->next->pos, point->pos) || \
   (angle_change(edge->prev, edge, edge->next) - angle_change(edge->prev, edge, point) > 20))

/**********************************************************************
 * is_equal
 *
 * Return true if the POINTs are equal.
 **********************************************************************/

#define is_equal(p1, p2) (((p1).x == (p2).x) && ((p1).y == (p2).y))

/**********************************************************************
 * is_on_line
 *
 * Return true if the point is on the line segment between the two end
 * points.  The two end points are included as part of the  line.  The
 * parameters must be of type POINT.
 **********************************************************************/

#define is_on_line(p, p0, p1) \
  (within_range((p).x, (p0).x, (p1).x) && within_range((p).y, (p0).y, (p1).y))

/**********************************************************************
 * within_range
 *
 * Return true if the first number is in between the second two numbers.
 * Return false otherwise.
 **********************************************************************/

#define within_range(x, x0, x1) (((x0 <= x) && (x <= x1)) || ((x1 <= x) && (x <= x0)))

#endif