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Partially working implementation of custom seam backend

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This commit is contained in:
Lukas Matena 2020-08-31 07:25:24 +02:00
parent 7844ca12fa
commit a1fadaf955
4 changed files with 227 additions and 56 deletions
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38
src/libslic3r/Polygon.cpp
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@ -259,6 +259,44 @@ Point Polygon::point_projection(const Point &point) const
return proj;
}
std::vector<float> Polygon::parameter_by_length() const
{
// Parametrize the polygon by its length.
std::vector<float> lengths(points.size()+1, 0.);
for (size_t i = 1; i < points.size(); ++ i)
lengths[i] = lengths[i-1] + (points[i] - points[i-1]).cast<float>().norm();
lengths.back() = lengths[lengths.size()-2] + (points.front() - points.back()).cast<float>().norm();
return lengths;
}
void Polygon::densify(float min_length, std::vector<float>* lengths_ptr)
{
std::vector<float> lengths_local;
std::vector<float>& lengths = lengths_ptr ? *lengths_ptr : lengths_local;
if (! lengths_ptr) {
// Length parametrization has not been provided. Calculate our own.
lengths = this->parameter_by_length();
}
assert(points.size() == lengths.size() - 1);
for (size_t j=1; j<=points.size(); ++j) {
bool last = j == points.size();
int i = last ? 0 : j;
if (lengths[j] - lengths[j-1] > min_length) {
Point diff = points[i] - points[j-1];
float diff_len = lengths[j] - lengths[j-1];
float r = (min_length/diff_len);
Point new_pt = points[j-1] + Point(r*diff[0], r*diff[1]);
points.insert(points.begin() + j, new_pt);
lengths.insert(lengths.begin() + j, lengths[j-1] + min_length);
}
}
assert(points.size() == lengths.size() - 1);
}
BoundingBox get_extents(const Points &points)
{
return BoundingBox(points);