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add code to check and fix the input orientation

This commit is contained in:
Sébastien Loriot 2020-03-18 14:43:28 +01:00
parent d024613501
commit 9193505df0
1 changed files with 21 additions and 0 deletions
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21
Straight_skeleton_2/examples/Straight_skeleton_2/Show_straight_skeleton.cpp
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@ -37,6 +37,27 @@ int main( int argc, char* argv[] )
{
is >> input ;
//check the validity of the input and fix orientation
if (!input.outer_boundary().is_simple())
{
std::cerr << "ERROR: outer boundary is not simple.";
return 1;
}
if ( input.outer_boundary().is_clockwise_oriented() )
input.outer_boundary().reverse_orientation();
int k=0;
for (Polygon_with_holes::Hole_iterator it = input.holes_begin();
it!=input.holes_end(); ++it, ++k)
{
if (!it->is_simple())
{
std::cerr << "ERROR: hole "<< k << " is not simple.\n";
return 1;
}
if (it->is_counterclockwise_oriented())
it->reverse_orientation();
}
Straight_skeleton_ptr ss = CGAL::create_interior_straight_skeleton_2(input);
if ( ss )
{