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Lay flat - rotation is now done in one go directly about the necessary axis

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This commit is contained in:
Lukas Matena 2018-08-21 15:40:11 +02:00
parent d197a5149a
commit 86b67bbd42
8 changed files with 62 additions and 27 deletions
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6
xs/src/slic3r/GUI/GLGizmo.cpp
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@ -706,12 +706,14 @@ void GLGizmoFlatten::update_planes()
}
polygon = Slic3r::Geometry::convex_hull(polygon); // To remove the inner points
// Calculate area of the polygon and discard ones that are too small
// We will calculate area of the polygon and discard ones that are too small
// The limit is more forgiving in case the normal is in the direction of the coordinate axes
const float minimal_area = (std::abs(normal.x) > 0.999f || std::abs(normal.y) > 0.999f || std::abs(normal.z) > 0.999f) ? 1.f : 20.f;
float area = 0.f;
for (unsigned int i = 0; i < polygon.size(); i++) // Shoelace formula
area += polygon[i].x*polygon[i+1 < polygon.size() ? i+1 : 0 ].y - polygon[i+1 < polygon.size() ? i+1 : 0].x*polygon[i].y;
area = std::abs(area/2.f);
if (area < 20.f) {
if (area < minimal_area) {
m_planes.erase(m_planes.begin()+(polygon_id--));
continue;
}