(lambda, phi)
| 10921 | } |
| 10922 | |
| 10923 | function visible(lambda, phi) { |
| 10924 | return cos$1(lambda) * cos$1(phi) > cr; |
| 10925 | } |
| 10926 | |
| 10927 | // Takes a line and cuts into visible segments. Return values used for polygon |
| 10928 | // clipping: 0 - there were intersections or the line was empty; 1 - no |