Function SplitLineDefsAndSector

roomedit/source/objects.cpp:2318–2353

*/

void SplitLineDefsAndSector (SHORT linedef1, SHORT linedef2)
{
   SelPtr llist;
   SHORT    s1, s2, s3, s4;

   /* check if the two LineDefs are adjacent to the same Sector */
   // ObjectsNeeded( OBJ_LINEDEFS, 0);
   s1 = LineDefs[ linedef1].sidedef1;
   s2 = LineDefs[ linedef1].sidedef2;
   s3 = LineDefs[ linedef2].sidedef1;
   s4 = LineDefs[ linedef2].sidedef2;
   // ObjectsNeeded( OBJ_SIDEDEFS, 0);
   if (s1 >= 0)
	  s1 = SideDefs[ s1].sector;
   if (s2 >= 0)
	  s2 = SideDefs[ s2].sector;
   if (s3 >= 0)
	  s3 = SideDefs[ s3].sector;
   if (s4 >= 0)
	  s4 = SideDefs[ s4].sector;
   if ((s1 < 0 || (s1 != s3 && s1 != s4)) && (s2 < 0 || (s2 != s3 && s2 != s4)))
   {
	  Beep();
	  Notify("LineDefs #%d and #%d are not adjacent to the same Sector",
			 linedef1, linedef2);
	  return;
   }
   /* split the two LineDefs and create two new Vertices */
   llist = NULL;
   SelectObject( &llist, linedef1);
   SelectObject( &llist, linedef2);
   SplitLineDefs( llist);
   ForgetSelection( &llist);
   /* split the Sector and create a LineDef between the two Vertices */
   SplitSector( NumVertexes - 1, NumVertexes - 2);
}