147 lines
4.5 KiB
C++
147 lines
4.5 KiB
C++
#include <catch2/catch.hpp>
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#include <test_utils.hpp>
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#include <libslic3r/ExPolygon.hpp>
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#include <libslic3r/BoundingBox.hpp>
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#include "sla_test_utils.hpp"
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namespace Slic3r { namespace sla {
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TEST_CASE("Overhanging point should be supported", "[SupGen]") {
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// Pyramid with 45 deg slope
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TriangleMesh mesh = make_pyramid(10.f, 10.f);
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mesh.rotate_y(float(PI));
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mesh.require_shared_vertices();
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mesh.WriteOBJFile("Pyramid.obj");
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sla::SupportPoints pts = calc_support_pts(mesh);
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// The overhang, which is the upside-down pyramid's edge
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Vec3f overh{0., 0., -10.};
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REQUIRE(!pts.empty());
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float dist = (overh - pts.front().pos).norm();
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for (const auto &pt : pts)
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dist = std::min(dist, (overh - pt.pos).norm());
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// Should require exactly one support point at the overhang
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REQUIRE(pts.size() > 0);
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REQUIRE(dist < 1.f);
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}
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double min_point_distance(const sla::SupportPoints &pts)
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{
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sla::PointIndex index;
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for (size_t i = 0; i < pts.size(); ++i)
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index.insert(pts[i].pos.cast<double>(), i);
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auto d = std::numeric_limits<double>::max();
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index.foreach([&d, &index](const sla::PointIndexEl &el) {
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auto res = index.nearest(el.first, 2);
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for (const sla::PointIndexEl &r : res)
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if (r.second != el.second)
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d = std::min(d, (el.first - r.first).norm());
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});
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return d;
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}
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TEST_CASE("Overhanging horizontal surface should be supported", "[SupGen]") {
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double width = 10., depth = 10., height = 1.;
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TriangleMesh mesh = make_cube(width, depth, height);
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mesh.translate(0., 0., 5.); // lift up
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mesh.require_shared_vertices();
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mesh.WriteOBJFile("Cuboid.obj");
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sla::SupportPointGenerator::Config cfg;
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sla::SupportPoints pts = calc_support_pts(mesh, cfg);
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double mm2 = width * depth;
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REQUIRE(!pts.empty());
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REQUIRE(pts.size() * cfg.support_force() > mm2 * cfg.tear_pressure());
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REQUIRE(min_point_distance(pts) >= cfg.minimal_distance);
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}
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template<class M> auto&& center_around_bb(M &&mesh)
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{
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auto bb = mesh.bounding_box();
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mesh.translate(-bb.center().template cast<float>());
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return std::forward<M>(mesh);
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}
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TEST_CASE("Overhanging edge should be supported", "[SupGen]") {
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float width = 10.f, depth = 10.f, height = 5.f;
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TriangleMesh mesh = make_prism(width, depth, height);
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mesh.rotate_y(float(PI)); // rotate on its back
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mesh.translate(0., 0., height);
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mesh.require_shared_vertices();
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mesh.WriteOBJFile("Prism.obj");
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sla::SupportPointGenerator::Config cfg;
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sla::SupportPoints pts = calc_support_pts(mesh, cfg);
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Linef3 overh{ {0.f, -depth / 2.f, 0.f}, {0.f, depth / 2.f, 0.f}};
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// Get all the points closer that 1 mm to the overhanging edge:
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sla::SupportPoints overh_pts; overh_pts.reserve(pts.size());
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std::copy_if(pts.begin(), pts.end(), std::back_inserter(overh_pts),
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[&overh](const sla::SupportPoint &pt){
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return line_alg::distance_to(overh, Vec3d{pt.pos.cast<double>()}) < 1.;
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});
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REQUIRE(overh_pts.size() * cfg.support_force() > overh.length() * cfg.tear_pressure());
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double ddiff = min_point_distance(pts) - cfg.minimal_distance;
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REQUIRE(ddiff > - 0.1 * cfg.minimal_distance);
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}
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TEST_CASE("Hollowed cube should be supported from the inside", "[SupGen][Hollowed]") {
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TriangleMesh mesh = make_cube(20., 20., 20.);
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hollow_mesh(mesh, HollowingConfig{});
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mesh.WriteOBJFile("cube_hollowed.obj");
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auto bb = mesh.bounding_box();
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auto h = float(bb.max.z() - bb.min.z());
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Vec3f mv = bb.center().cast<float>() - Vec3f{0.f, 0.f, 0.5f * h};
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mesh.translate(-mv);
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mesh.require_shared_vertices();
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sla::SupportPointGenerator::Config cfg;
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sla::SupportPoints pts = calc_support_pts(mesh, cfg);
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sla::remove_bottom_points(pts, mesh.bounding_box().min.z() + EPSILON);
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REQUIRE(!pts.empty());
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}
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TEST_CASE("Two parallel plates should be supported", "[SupGen][Hollowed]")
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{
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double width = 20., depth = 20., height = 1.;
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TriangleMesh mesh = center_around_bb(make_cube(width + 5., depth + 5., height));
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TriangleMesh mesh_high = center_around_bb(make_cube(width, depth, height));
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mesh_high.translate(0., 0., 10.); // lift up
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mesh.merge(mesh_high);
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mesh.require_shared_vertices();
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mesh.WriteOBJFile("parallel_plates.obj");
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sla::SupportPointGenerator::Config cfg;
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sla::SupportPoints pts = calc_support_pts(mesh, cfg);
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sla::remove_bottom_points(pts, mesh.bounding_box().min.z() + EPSILON);
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REQUIRE(!pts.empty());
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}
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}} // namespace Slic3r::sla
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