mirror of
https://github.com/SoftFever/OrcaSlicer.git
synced 2025-11-02 12:41:18 -07:00
377 lines
12 KiB
C++
377 lines
12 KiB
C++
#define NOMINMAX
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#include <catch2/catch.hpp>
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#include <test_utils.hpp>
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#include <fstream>
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#include <libslic3r/MarchingSquares.hpp>
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#include <libslic3r/SLA/RasterToPolygons.hpp>
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#include <libslic3r/SLA/AGGRaster.hpp>
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#include <libslic3r/MTUtils.hpp>
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#include <libslic3r/SVG.hpp>
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#include <libslic3r/ClipperUtils.hpp>
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#include <libslic3r/TriangleMeshSlicer.hpp>
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#include <libslic3r/TriangulateWall.hpp>
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#include <libslic3r/Tesselate.hpp>
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#include <libslic3r/SlicesToTriangleMesh.hpp>
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using namespace Slic3r;
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static double area(const sla::RasterBase::PixelDim &pxd)
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{
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return pxd.w_mm * pxd.h_mm;
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}
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static Slic3r::sla::RasterGrayscaleAA create_raster(
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const sla::RasterBase::Resolution &res,
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double disp_w = 100.,
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double disp_h = 100.)
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{
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sla::RasterBase::PixelDim pixdim{disp_w / res.width_px, disp_h / res.height_px};
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auto bb = BoundingBox({0, 0}, {scaled(disp_w), scaled(disp_h)});
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sla::RasterBase::Trafo trafo;
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trafo.center_x = bb.center().x();
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trafo.center_y = bb.center().y();
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return sla::RasterGrayscaleAA{res, pixdim, trafo, agg::gamma_threshold(.5)};
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}
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static ExPolygon square(double a, Point center = {0, 0})
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{
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ExPolygon poly;
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coord_t V = scaled(a / 2.);
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poly.contour.points = {{-V, -V}, {V, -V}, {V, V}, {-V, V}};
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poly.translate(center.x(), center.y());
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return poly;
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}
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static ExPolygon square_with_hole(double a, Point center = {0, 0})
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{
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ExPolygon poly = square(a);
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poly.holes.emplace_back();
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coord_t V = scaled(a / 4.);
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poly.holes.front().points = {{-V, V}, {V, V}, {V, -V}, {-V, -V}};
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poly.translate(center.x(), center.y());
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return poly;
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}
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static ExPolygons circle_with_hole(double r, Point center = {0, 0}) {
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ExPolygon poly;
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std::vector<double> pis = linspace_vector(0., 2 * PI, 100);
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coord_t rs = scaled(r);
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for (double phi : pis) {
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poly.contour.points.emplace_back(rs * std::cos(phi), rs * std::sin(phi));
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}
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poly.holes.emplace_back(poly.contour);
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poly.holes.front().reverse();
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for (auto &p : poly.holes.front().points) p /= 2;
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poly.translate(center.x(), center.y());
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return {poly};
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}
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static const Vec2i W4x4 = {4, 4};
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static const Vec2i W2x2 = {2, 2};
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template<class Rst>
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static void test_expolys(Rst && rst,
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const ExPolygons & ref,
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Vec2i window,
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const std::string &name = "test")
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{
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for (const ExPolygon &expoly : ref) rst.draw(expoly);
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std::fstream out(name + ".png", std::ios::out);
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out << rst.encode(sla::PNGRasterEncoder{});
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out.close();
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ExPolygons extracted = sla::raster_to_polygons(rst, window);
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SVG svg(name + ".svg");
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svg.draw(extracted);
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svg.draw(ref, "green");
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svg.Close();
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double max_rel_err = 0.1;
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sla::RasterBase::PixelDim pxd = rst.pixel_dimensions();
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double max_abs_err = area(pxd) * scaled(1.) * scaled(1.);
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BoundingBox ref_bb;
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for (auto &expoly : ref) ref_bb.merge(expoly.contour.bounding_box());
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double max_displacement = 4. * (std::pow(pxd.h_mm, 2) + std::pow(pxd.w_mm, 2));
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max_displacement *= scaled<double>(1.) * scaled(1.);
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REQUIRE(extracted.size() == ref.size());
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for (size_t i = 0; i < ref.size(); ++i) {
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REQUIRE(extracted[i].contour.is_counter_clockwise());
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REQUIRE(extracted[i].holes.size() == ref[i].holes.size());
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for (auto &h : extracted[i].holes) REQUIRE(h.is_clockwise());
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double refa = ref[i].area();
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double abs_err = std::abs(extracted[i].area() - refa);
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double rel_err = abs_err / refa;
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REQUIRE((rel_err <= max_rel_err || abs_err <= max_abs_err));
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BoundingBox bb;
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for (auto &expoly : extracted) bb.merge(expoly.contour.bounding_box());
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Point d = bb.center() - ref_bb.center();
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REQUIRE(double(d.transpose() * d) <= max_displacement);
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}
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}
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TEST_CASE("Empty raster should result in empty polygons", "[MarchingSquares]") {
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sla::RasterGrayscaleAAGammaPower rst{{}, {}, {}};
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ExPolygons extracted = sla::raster_to_polygons(rst);
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REQUIRE(extracted.size() == 0);
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}
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TEST_CASE("Marching squares directions", "[MarchingSquares]") {
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marchsq::Coord crd{1, 1};
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REQUIRE(step(crd, marchsq::__impl::Dir::left).r == 1);
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REQUIRE(step(crd, marchsq::__impl::Dir::left).c == 0);
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REQUIRE(step(crd, marchsq::__impl::Dir::down).r == 2);
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REQUIRE(step(crd, marchsq::__impl::Dir::down).c == 1);
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REQUIRE(step(crd, marchsq::__impl::Dir::right).r == 1);
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REQUIRE(step(crd, marchsq::__impl::Dir::right).c == 2);
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REQUIRE(step(crd, marchsq::__impl::Dir::up).r == 0);
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REQUIRE(step(crd, marchsq::__impl::Dir::up).c == 1);
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}
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TEST_CASE("Fully covered raster should result in a rectangle", "[MarchingSquares]") {
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auto rst = create_raster({4, 4}, 4., 4.);
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ExPolygon rect = square(4);
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SECTION("Full accuracy") {
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test_expolys(rst, {rect}, W2x2, "fully_covered_full_acc");
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}
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SECTION("Half accuracy") {
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test_expolys(rst, {rect}, W4x4, "fully_covered_half_acc");
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}
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}
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TEST_CASE("4x4 raster with one ring", "[MarchingSquares]") {
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sla::RasterBase::PixelDim pixdim{1, 1};
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// We need one additional row and column to detect edges
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sla::RasterGrayscaleAA rst{{4, 4}, pixdim, {}, agg::gamma_threshold(.5)};
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// Draw a triangle from individual pixels
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rst.draw(square(1., {0500000, 0500000}));
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rst.draw(square(1., {1500000, 0500000}));
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rst.draw(square(1., {2500000, 0500000}));
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rst.draw(square(1., {1500000, 1500000}));
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rst.draw(square(1., {2500000, 1500000}));
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rst.draw(square(1., {2500000, 2500000}));
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std::fstream out("4x4.png", std::ios::out);
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out << rst.encode(sla::PNGRasterEncoder{});
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out.close();
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ExPolygons extracted = sla::raster_to_polygons(rst);
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SVG svg("4x4.svg");
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svg.draw(extracted);
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svg.Close();
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REQUIRE(extracted.size() == 1);
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}
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TEST_CASE("4x4 raster with two rings", "[MarchingSquares]") {
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sla::RasterBase::PixelDim pixdim{1, 1};
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// We need one additional row and column to detect edges
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sla::RasterGrayscaleAA rst{{5, 5}, pixdim, {}, agg::gamma_threshold(.5)};
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SECTION("Ambiguous case with 'ac' square") {
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// Draw a triangle from individual pixels
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rst.draw(square(1., {3500000, 2500000}));
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rst.draw(square(1., {3500000, 3500000}));
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rst.draw(square(1., {2500000, 3500000}));
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rst.draw(square(1., {2500000, 1500000}));
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rst.draw(square(1., {1500000, 1500000}));
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rst.draw(square(1., {1500000, 2500000}));
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std::fstream out("4x4_ac.png", std::ios::out);
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out << rst.encode(sla::PNGRasterEncoder{});
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out.close();
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ExPolygons extracted = sla::raster_to_polygons(rst);
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SVG svg("4x4_ac.svg");
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svg.draw(extracted);
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svg.Close();
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REQUIRE(extracted.size() == 2);
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}
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SECTION("Ambiguous case with 'bd' square") {
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// Draw a triangle from individual pixels
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rst.draw(square(1., {3500000, 1500000}));
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rst.draw(square(1., {3500000, 2500000}));
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rst.draw(square(1., {2500000, 1500000}));
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rst.draw(square(1., {1500000, 2500000}));
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rst.draw(square(1., {1500000, 3500000}));
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rst.draw(square(1., {2500000, 3500000}));
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std::fstream out("4x4_bd.png", std::ios::out);
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out << rst.encode(sla::PNGRasterEncoder{});
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out.close();
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ExPolygons extracted = sla::raster_to_polygons(rst);
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SVG svg("4x4_bd.svg");
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svg.draw(extracted);
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svg.Close();
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REQUIRE(extracted.size() == 2);
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}
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}
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TEST_CASE("Square with hole in the middle", "[MarchingSquares]") {
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using namespace Slic3r;
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ExPolygons inp = {square_with_hole(50.)};
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SECTION("Proportional raster, 1x1 mm pixel size, full accuracy") {
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test_expolys(create_raster({100, 100}, 100., 100.), inp, W2x2, "square_with_hole_proportional_1x1_mm_px_full");
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}
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SECTION("Proportional raster, 1x1 mm pixel size, half accuracy") {
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test_expolys(create_raster({100, 100}, 100., 100.), inp, W4x4, "square_with_hole_proportional_1x1_mm_px_half");
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}
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SECTION("Landscape raster, 1x1 mm pixel size, full accuracy") {
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test_expolys(create_raster({150, 100}, 150., 100.), inp, W2x2, "square_with_hole_landsc_1x1_mm_px_full");
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}
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SECTION("Landscape raster, 1x1 mm pixel size, half accuracy") {
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test_expolys(create_raster({150, 100}, 150., 100.), inp, W4x4, "square_with_hole_landsc_1x1_mm_px_half");
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}
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SECTION("Portrait raster, 1x1 mm pixel size, full accuracy") {
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test_expolys(create_raster({100, 150}, 100., 150.), inp, W2x2, "square_with_hole_portrait_1x1_mm_px_full");
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}
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SECTION("Portrait raster, 1x1 mm pixel size, half accuracy") {
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test_expolys(create_raster({100, 150}, 100., 150.), inp, W4x4, "square_with_hole_portrait_1x1_mm_px_half");
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}
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SECTION("Proportional raster, 2x2 mm pixel size, full accuracy") {
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test_expolys(create_raster({200, 200}, 100., 100.), inp, W2x2, "square_with_hole_proportional_2x2_mm_px_full");
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}
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SECTION("Proportional raster, 2x2 mm pixel size, half accuracy") {
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test_expolys(create_raster({200, 200}, 100., 100.), inp, W4x4, "square_with_hole_proportional_2x2_mm_px_half");
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}
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SECTION("Proportional raster, 0.5x0.5 mm pixel size, full accuracy") {
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test_expolys(create_raster({50, 50}, 100., 100.), inp, W2x2, "square_with_hole_proportional_0.5x0.5_mm_px_full");
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}
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SECTION("Proportional raster, 0.5x0.5 mm pixel size, half accuracy") {
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test_expolys(create_raster({50, 50}, 100., 100.), inp, W4x4, "square_with_hole_proportional_0.5x0.5_mm_px_half");
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}
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}
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TEST_CASE("Circle with hole in the middle", "[MarchingSquares]") {
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using namespace Slic3r;
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test_expolys(create_raster({1000, 1000}), circle_with_hole(25.), W2x2, "circle_with_hole");
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}
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static void recreate_object_from_rasters(const std::string &objname, float lh) {
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TriangleMesh mesh = load_model(objname);
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auto bb = mesh.bounding_box();
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Vec3f tr = -bb.center().cast<float>();
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mesh.translate(tr.x(), tr.y(), tr.z());
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bb = mesh.bounding_box();
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assert(mesh.has_shared_vertices());
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std::vector<ExPolygons> layers = slice_mesh_ex(mesh.its, grid(float(bb.min.z()) + lh, float(bb.max.z()), lh));
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sla::RasterBase::Resolution res{2560, 1440};
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double disp_w = 120.96;
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double disp_h = 68.04;
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#ifndef NDEBUG
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size_t cntr = 0;
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#endif
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for (ExPolygons &layer : layers) {
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auto rst = create_raster(res, disp_w, disp_h);
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for (ExPolygon &island : layer) {
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rst.draw(island);
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}
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#ifndef NDEBUG
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std::fstream out(objname + std::to_string(cntr) + ".png", std::ios::out);
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out << rst.encode(sla::PNGRasterEncoder{});
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out.close();
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#endif
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ExPolygons layer_ = sla::raster_to_polygons(rst);
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// float delta = scaled(std::min(rst.pixel_dimensions().h_mm,
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// rst.pixel_dimensions().w_mm)) / 2;
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// layer_ = expolygons_simplify(layer_, delta);
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#ifndef NDEBUG
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SVG svg(objname + std::to_string(cntr) + ".svg", BoundingBox(Point{0, 0}, Point{scaled(disp_w), scaled(disp_h)}));
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svg.draw(layer_);
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svg.draw(layer, "green");
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svg.Close();
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#endif
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double layera = 0., layera_ = 0.;
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for (auto &p : layer) layera += p.area();
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for (auto &p : layer_) layera_ += p.area();
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#ifndef NDEBUG
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std::cout << cntr++ << std::endl;
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#endif
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double diff = std::abs(layera_ - layera);
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REQUIRE((diff <= 0.1 * layera || diff < scaled<double>(1.) * scaled<double>(1.)));
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layer = std::move(layer_);
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}
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indexed_triangle_set out = slices_to_mesh(layers, bb.min.z(), double(lh), double(lh));
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its_write_obj(out, "out_from_rasters.obj");
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}
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TEST_CASE("Recreate object from rasters", "[SL1Import]") {
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recreate_object_from_rasters("frog_legs.obj", 0.05f);
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}
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