#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 (int16_t y)

Detailed Description

Definition at line 91 of file polyblk.h.

Constructor & Destructor Documentation

◆ PB_LINE_IT()

PB_LINE_IT::PB_LINE_IT ( POLY_BLOCK * blkptr )

inline

Definition at line 93 of file polyblk.h.

                                  {
     block = blkptr;
   }

Member Function Documentation

◆ get_line()

ICOORDELT_LIST * PB_LINE_IT::get_line ( int16_t y )

Definition at line 341 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<int16_t>(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 PB_LINE_IT::set_to_block ( POLY_BLOCK * blkptr )