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52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
#include "Plater/PlaterObject.hpp"
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#include "Geometry.hpp"
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#include "ExPolygon.hpp"
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#include "libslic3r.h"
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namespace Slic3r { namespace GUI {
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Slic3r::ExPolygonCollection& PlaterObject::make_thumbnail(const Slic3r::Model& model, int obj_idx) {
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// make method idempotent
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this->thumbnail.expolygons.clear();
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auto mesh {model.objects[obj_idx]->raw_mesh()};
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auto model_instance {model.objects[obj_idx]->instances[0]};
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// Apply any x/y rotations and scaling vector if this came from a 3MF object.
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mesh.rotate_x(model_instance->x_rotation);
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mesh.rotate_y(model_instance->y_rotation);
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mesh.scale(model_instance->scaling_vector);
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if (mesh.facets_count() <= 5000) {
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auto area_threshold {scale_(1.0)};
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ExPolygons tmp {};
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std::copy_if(tmp.end(), mesh.horizontal_projection().begin(), mesh.horizontal_projection().end(), [=](const ExPolygon& p) { return p.area() >= area_threshold; } ); // return all polys bigger than the area
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this->thumbnail.append(tmp);
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this->thumbnail.simplify(0.5);
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} else {
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auto convex_hull {Slic3r::ExPolygon(mesh.convex_hull())};
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this->thumbnail.append(convex_hull);
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}
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return this->thumbnail;
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}
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Slic3r::ExPolygonCollection& PlaterObject::transform_thumbnail(const Slic3r::Model& model, int obj_idx) {
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if (this->thumbnail.expolygons.size() == 0) return this->thumbnail;
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const auto& model_object {model.objects[obj_idx] };
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const auto& model_instance {model_object->instances[0]};
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// the order of these transformations MUST be the same everywhere, including
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// in Slic3r::Print->add_model_object()
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auto t {this->thumbnail};
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t.rotate(model_instance->rotation, Slic3r::Point(0,0));
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t.scale(model_instance->scaling_factor);
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this->transformed_thumbnail = t;
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return this->transformed_thumbnail;
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}
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} } // Namespace Slic3r::GUI
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