#include <polyblk.h>

Public Member Functions
	PB_LINE_IT (POLY_BLOCK *blkptr)

void	set_to_block (POLY_BLOCK *blkptr)

POLY_BLOCK::reflect_in_y_axis
Reflect the coords of the polygon in the y-axis. (Flip the sign of x.)
ICOORDELT_LIST *	get_line (TDimension y)

Detailed Description

Definition at line 95 of file polyblk.h.

Constructor & Destructor Documentation

◆ PB_LINE_IT()

tesseract::PB_LINE_IT::PB_LINE_IT ( POLY_BLOCK * blkptr )

inline

Definition at line 97 of file polyblk.h.

                                 {
    block = blkptr;
  }

Member Function Documentation

◆ get_line()

ICOORDELT_LIST * tesseract::PB_LINE_IT::get_line ( TDimension y )

Definition at line 337 of file polyblk.cpp.

                                                 {
  ICOORDELT_IT v, r;
  ICOORDELT_LIST *result;
  ICOORDELT *x, *current, *previous;
  float fy = y + 0.5f;
  result = new ICOORDELT_LIST();
  r.set_to_list(result);
  v.set_to_list(block->points());
 
  for (v.mark_cycle_pt(); !v.cycled_list(); v.forward()) {
    if (((v.data_relative(-1)->y() > y) && (v.data()->y() <= y)) ||
        ((v.data_relative(-1)->y() <= y) && (v.data()->y() > y))) {
      previous = v.data_relative(-1);
      current = v.data();
      float fx =
          0.5f + previous->x() +
          (current->x() - previous->x()) * (fy - previous->y()) / (current->y() - previous->y());
      x = new ICOORDELT(static_cast<TDimension>(fx), 0);
      r.add_to_end(x);
    }
  }
 
  if (!r.empty()) {
    r.sort(lessthan);
    for (r.mark_cycle_pt(); !r.cycled_list(); r.forward()) {
      x = r.data();
    }
    for (r.mark_cycle_pt(); !r.cycled_list(); r.forward()) {
      r.data()->set_y(r.data_relative(1)->x() - r.data()->x());
      r.forward();
      delete (r.extract());
    }
  }
 
  return result;
}

◆ set_to_block()

void tesseract::PB_LINE_IT::set_to_block ( POLY_BLOCK * blkptr )