| 356 | } |
| 357 | |
| 358 | static char parallelInt( Point2f a, Point2f b, Point2f c, Point2f d, Point2f& p, Point2f& q ) |
| 359 | { |
| 360 | char code = 'e'; |
| 361 | if( areaSign(a, b, c) != 0 ) |
| 362 | code = '0'; |
| 363 | else if( between(a, b, c) && between(a, b, d)) |
| 364 | p = c, q = d; |
| 365 | else if( between(c, d, a) && between(c, d, b)) |
| 366 | p = a, q = b; |
| 367 | else if( between(a, b, c) && between(c, d, b)) |
| 368 | p = c, q = b; |
| 369 | else if( between(a, b, c) && between(c, d, a)) |
| 370 | p = c, q = a; |
| 371 | else if( between(a, b, d) && between(c, d, b)) |
| 372 | p = d, q = b; |
| 373 | else if( between(a, b, d) && between(c, d, a)) |
| 374 | p = d, q = a; |
| 375 | else |
| 376 | code = '0'; |
| 377 | return code; |
| 378 | } |
| 379 | |
| 380 | //--------------------------------------------------------------------- |
| 381 | // segSegInt: Finds the point of intersection p between two closed |