CGAL users discussion list

[xihongshidelove666 <>]

hey ,friends:

when i was doing "join" operation on some triangles using the function OutputIterator join( InputIterator begin, InputIterator end, OutputIterator oi), i found that the  result is not so well , the result had some redandant segments.

additionally , i used Gmp Numbertype

here is the example :

the input is three triangles recorded with off format.

OFF
9 3 0
-10 -7.27319 6.6
-2.99982 -6.71118 6.6
-2.73416 -7.03992 6.6
-2.7605 -6.72929 3.5
-1.00757 16.4431 3.5
-1.24689 164612 3.5
-1.24689 16.4612 3.5
-2.99982 -6.71118 3.5
-2.7605 -6.72929 3.5
3 0 1 2
3 3 4 5
3 6 7 8

and the output :

OFF
7 1 0
-2.99982-6.71118 0
-2.73416 -7.03992 0
2.50018 -7.27319 0
-2.99982 -6.71118 0
-2.7605 -6.72929 0
-1.00757 16.4431 0
-1.24689 16.4612 0
7 0 1 2 3 4 5 6

 

then lets see the output.

you can see the 0th point and the 3th point are the same . 

the egment with the 3th point and the 4th point of the output polygon has been recovered by the segment with the 2th point and 3th point .

 

i dont know why and how to deal with it .

 

thanks for your attention!

 

if anyone came help i will appreciate it very much .

thanks

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