3DPrinting/PrusaSlicer-NonPlainar
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fix numerical issues in stability calculations

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This commit is contained in:
PavelMikus 2022-07-26 16:50:08 +02:00
parent 90e77f9135
commit 9cfde724f1
1 changed files with 10 additions and 1 deletions
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11
src/libslic3r/SupportSpotsGenerator.cpp
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@ -638,12 +638,14 @@ public:
auto compute_elastic_section_modulus = [&line_dir](
const Vec3f &centroid_accumulator, const Vec2f &second_moment_of_area_accumulator, const float &area) {
if (area < EPSILON) return 0.0f;
Vec3f centroid = centroid_accumulator / area;
Vec2f variance = (second_moment_of_area_accumulator / area
- centroid.head<2>().cwiseProduct(centroid.head<2>()));
variance = variance.cwiseProduct(line_dir.cwiseAbs());
float extreme_fiber_dist = variance.cwiseSqrt().norm();
if (extreme_fiber_dist < EPSILON) {
return 0.0f;
}
float elastic_section_modulus = area * (variance.x() + variance.y()) / extreme_fiber_dist;
return elastic_section_modulus;
};
@ -663,6 +665,9 @@ public:
// section for bed calculations
{
if (this->sticking_area < EPSILON)
return 1.0f;
Vec3f bed_centroid = this->sticking_centroid_accumulator / this->sticking_area;
float bed_yield_torque = compute_elastic_section_modulus(this->sticking_centroid_accumulator,
this->sticking_second_moment_of_area_accumulator, this->sticking_area)
@ -708,6 +713,9 @@ public:
//section for weak connection calculations
{
if (connection.area < EPSILON)
return 1.0f;
Vec3f conn_centroid = connection.centroid_accumulator / connection.area;
float conn_yield_torque = compute_elastic_section_modulus(connection.centroid_accumulator,
connection.second_moment_of_area_accumulator, connection.area) * params.material_yield_strength;
@ -763,6 +771,7 @@ void debug_print_graph(const std::vector<LayerIslands> &islands_graph) {
std::cout << " volume: " << island.volume << std::endl;
std::cout << " sticking_area: " << island.sticking_area << std::endl;
std::cout << " connected_islands count: " << island.connected_islands.size() << std::endl;
std::cout << " lines count: " << island.external_lines.size() << std::endl;
}
}
std::cout << "END OF GRAPH" << std::endl;