split.h File Reference

#include "blobs.h"
#include "params.h"
#include "rect.h"

Go to the source code of this file.

Classes
struct	SPLIT

Functions
EDGEPT *	make_edgept (int x, int y, EDGEPT *next, EDGEPT *prev)
void	remove_edgept (EDGEPT *point)

Variables
bool	wordrec_display_splits = 0

Function Documentation

make_edgept()

EDGEPT* make_edgept	(	int	x,
		int	y,
		EDGEPT *	next,
		EDGEPT *	prev
	)

Definition at line 145 of file split.cpp.

                                                              {
  EDGEPT *this_edgept;
  /* Create point */
  this_edgept = new EDGEPT;
  this_edgept->pos.x = x;
  this_edgept->pos.y = y;
  // Now deal with the src_outline steps.
  C_OUTLINE* prev_ol = prev->src_outline;
  if (prev_ol != nullptr && prev->next == next) {
    // Compute the fraction of the segment that is being cut.
    FCOORD segment_vec(next->pos.x - prev->pos.x, next->pos.y - prev->pos.y);
    FCOORD target_vec(x - prev->pos.x, y - prev->pos.y);
    double cut_fraction = target_vec.length() / segment_vec.length();
    // Get the start and end at the step level.
    ICOORD step_start = prev_ol->position_at_index(prev->start_step);
    int end_step = prev->start_step + prev->step_count;
    int step_length = prev_ol->pathlength();
    ICOORD step_end = prev_ol->position_at_index(end_step % step_length);
    ICOORD step_vec = step_end - step_start;
    double target_length = step_vec.length() * cut_fraction;
    // Find the point on the segment that gives the length nearest to target.
    int best_step = prev->start_step;
    ICOORD total_step(0, 0);
    double best_dist = target_length;
    for (int s = prev->start_step; s < end_step; ++s) {
      total_step += prev_ol->step(s % step_length);
      double dist = fabs(target_length - total_step.length());
      if (dist < best_dist) {
        best_dist = dist;
        best_step = s + 1;
      }
    }
    // The new point is an intermediate point.
    this_edgept->src_outline = prev_ol;
    this_edgept->step_count = end_step - best_step;
    this_edgept->start_step = best_step % step_length;
    prev->step_count = best_step - prev->start_step;
  } else {
    // The new point is poly only.
    this_edgept->src_outline = nullptr;
    this_edgept->step_count = 0;
    this_edgept->start_step = 0;
  }
  /* Hook it up */
  this_edgept->next = next;
  this_edgept->prev = prev;
  prev->next = this_edgept;
  next->prev = this_edgept;
  /* Set up vec entries */
  this_edgept->vec.x = this_edgept->next->pos.x - x;
  this_edgept->vec.y = this_edgept->next->pos.y - y;
  this_edgept->prev->vec.x = x - this_edgept->prev->pos.x;
  this_edgept->prev->vec.y = y - this_edgept->prev->pos.y;
  return this_edgept;
}

remove_edgept()

void remove_edgept

(

EDGEPT *

point

)

Definition at line 206 of file split.cpp.

                                  {
  EDGEPT *prev = point->prev;
  EDGEPT *next = point->next;
  // Add point's steps onto prev's steps if they are from the same outline.
  if (prev->src_outline == point->src_outline && prev->src_outline != nullptr) {
    prev->step_count += point->step_count;
  }
  prev->next = next;
  next->prev = prev;
  prev->vec.x = next->pos.x - prev->pos.x;
  prev->vec.y = next->pos.y - prev->pos.y;
  delete point;
}

Variable Documentation

wordrec_display_splits

bool wordrec_display_splits = 0

"Display splits"

Definition at line 47 of file split.cpp.