Member function of Earcut Assumes that the point type has a size member function about earcut.hpp HOT 5 CLOSED

Perfect! Sorry for the noise.

For the records, since I'm not supporting holes in my application, I opted to send std::span<std::vector<glm::vec2>, 1>{std::addressof(points), 1}, where points is a std::vector<glm::vec2>

from earcut.hpp.

I think there's some confusion about the types.

The input type for earcut has a structure like vector<vector<point>>. For the point type, it's sufficient if nth<0, ...> and nth<1, ...> is defined. For the vector type, it's necessary to define container methods such as 'size', operator[] etc.

Namely, the functions Earcut::operator() and Earcut::linkedList are using points[i].size(), but it is documented that specializing the nth is enough to make it compatible.

points[i] would be a vector, therefore points[i].size() is the number of points of the polygon/point-list/vector with the index i.

from earcut.hpp.

Hmm, right now I'm trying to send a std::vector<glm::vec2>. I would need to send a std::vector<std::vector<glm::vec2>>? What is the second dimension is supposed to represent? I'm not sure how to layout my data

from earcut.hpp.

Ah! I see, this is to support holes inside a polygon?

from earcut.hpp.

Yes, to support holes. The first vector<point> is the main surrounding polygon, further point-lists define holes.

std::vector<std::vector<glm::vec2>> would work.

from earcut.hpp.