| 334 | |
| 335 | |
| 336 | void SwapOutrecs(Active& e1, Active& e2) |
| 337 | { |
| 338 | OutRec* or1 = e1.outrec; |
| 339 | OutRec* or2 = e2.outrec; |
| 340 | if (or1 == or2) |
| 341 | { |
| 342 | Active* e = or1->front_edge; |
| 343 | or1->front_edge = or1->back_edge; |
| 344 | or1->back_edge = e; |
| 345 | return; |
| 346 | } |
| 347 | if (or1) |
| 348 | { |
| 349 | if (&e1 == or1->front_edge) |
| 350 | or1->front_edge = &e2; |
| 351 | else |
| 352 | or1->back_edge = &e2; |
| 353 | } |
| 354 | if (or2) |
| 355 | { |
| 356 | if (&e2 == or2->front_edge) |
| 357 | or2->front_edge = &e1; |
| 358 | else |
| 359 | or2->back_edge = &e1; |
| 360 | } |
| 361 | e1.outrec = or2; |
| 362 | e2.outrec = or1; |
| 363 | } |
| 364 | |
| 365 | |
| 366 | double Area(OutPt* op) |