2019-09-26 07:42:08 +00:00
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#include <map>
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2019-09-24 13:24:47 +00:00
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#include <gtest/gtest.h>
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#include "libslic3r/libslic3r.h"
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#include "libslic3r/Format/OBJ.hpp"
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#include "libslic3r/SLAPrint.hpp"
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#include "libslic3r/TriangleMesh.hpp"
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#include "libslic3r/SLA/SLAPad.hpp"
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2019-09-26 07:42:08 +00:00
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#include "libslic3r/SLA/SLASupportTreeBuilder.hpp"
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#include "libslic3r/SLA/SLASupportTreeAlgorithm.hpp"
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2019-09-24 13:24:47 +00:00
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#include "libslic3r/SLA/SLAAutoSupports.hpp"
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#include "libslic3r/MTUtils.hpp"
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#include "libslic3r/SVG.hpp"
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#if defined(WIN32) || defined(_WIN32)
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#define PATH_SEPARATOR "\\"
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#else
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#define PATH_SEPARATOR "/"
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#endif
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namespace {
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using namespace Slic3r;
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TriangleMesh load_model(const std::string &obj_filename)
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{
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TriangleMesh mesh;
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auto fpath = std::string(TEST_DATA_DIR PATH_SEPARATOR) + obj_filename;
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load_obj(fpath.c_str(), &mesh);
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return mesh;
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}
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enum e_validity {
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ASSUME_NO_EMPTY = 1,
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ASSUME_MANIFOLD = 2,
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ASSUME_NO_REPAIR = 4
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};
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void check_validity(const TriangleMesh &input_mesh,
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int flags = ASSUME_NO_EMPTY | ASSUME_MANIFOLD |
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ASSUME_NO_REPAIR)
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{
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TriangleMesh mesh{input_mesh};
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if (flags & ASSUME_NO_EMPTY) {
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ASSERT_FALSE(mesh.empty());
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} else if (mesh.empty())
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return; // If it can be empty and it is, there is nothing left to do.
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ASSERT_TRUE(stl_validate(&mesh.stl));
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bool do_update_shared_vertices = false;
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mesh.repair(do_update_shared_vertices);
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if (flags & ASSUME_NO_REPAIR) {
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ASSERT_FALSE(mesh.needed_repair());
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}
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if (flags & ASSUME_MANIFOLD) {
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mesh.require_shared_vertices();
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if (!mesh.is_manifold()) mesh.WriteOBJFile("non_manifold.obj");
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ASSERT_TRUE(mesh.is_manifold());
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}
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}
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struct PadByproducts
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{
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ExPolygons model_contours;
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ExPolygons support_contours;
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TriangleMesh mesh;
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};
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void test_pad(const std::string & obj_filename,
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const sla::PadConfig &padcfg,
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PadByproducts & out)
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{
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ASSERT_TRUE(padcfg.validate().empty());
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TriangleMesh mesh = load_model(obj_filename);
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ASSERT_FALSE(mesh.empty());
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// Create pad skeleton only from the model
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Slic3r::sla::pad_blueprint(mesh, out.model_contours);
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ASSERT_FALSE(out.model_contours.empty());
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// Create the pad geometry the model contours only
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Slic3r::sla::create_pad({}, out.model_contours, out.mesh, padcfg);
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check_validity(out.mesh);
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auto bb = out.mesh.bounding_box();
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ASSERT_DOUBLE_EQ(bb.max.z() - bb.min.z(),
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padcfg.full_height());
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}
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void test_pad(const std::string & obj_filename,
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const sla::PadConfig &padcfg = {})
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{
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PadByproducts byproducts;
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test_pad(obj_filename, padcfg, byproducts);
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}
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struct SupportByproducts
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{
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std::vector<float> slicegrid;
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std::vector<ExPolygons> model_slices;
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2019-09-26 07:42:08 +00:00
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sla::SupportTreeBuilder supporttree;
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2019-09-24 13:24:47 +00:00
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};
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const constexpr float CLOSING_RADIUS = 0.005f;
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2019-09-26 07:42:08 +00:00
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void check_support_tree_integrity(const sla::SupportTreeBuilder &stree,
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const sla::SupportConfig &cfg)
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{
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double gnd = stree.ground_level;
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double H1 = cfg.max_solo_pillar_height_mm;
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double H2 = cfg.max_dual_pillar_height_mm;
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for (const sla::Pillar &pillar : stree.pillars()) {
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if (std::abs(pillar.endpoint().z() - gnd) < EPSILON) {
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double h = pillar.height;
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if (h > H1) ASSERT_GE(pillar.links, 1);
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else if(h > H2) { ASSERT_GE(pillar.links, 2); }
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}
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ASSERT_LE(pillar.links, cfg.pillar_cascade_neighbors);
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ASSERT_LE(pillar.bridges, cfg.max_bridges_on_pillar);
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}
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double max_bridgelen = 0.;
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auto chck_bridge = [&cfg](const sla::Bridge &bridge, double &max_brlen) {
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Vec3d n = bridge.endp - bridge.startp;
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double d = sla::distance(n);
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max_brlen = std::max(d, max_brlen);
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double z = n.z();
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double polar = std::acos(z / d);
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double slope = -polar + PI / 2.;
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ASSERT_TRUE(slope >= cfg.bridge_slope || slope <= -cfg.bridge_slope);
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};
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for (auto &bridge : stree.bridges()) chck_bridge(bridge, max_bridgelen);
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ASSERT_LE(max_bridgelen, cfg.max_bridge_length_mm);
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max_bridgelen = 0;
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for (auto &bridge : stree.crossbridges()) chck_bridge(bridge, max_bridgelen);
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double md = cfg.max_pillar_link_distance_mm / std::cos(-cfg.bridge_slope);
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ASSERT_LE(max_bridgelen, md);
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}
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2019-09-24 13:24:47 +00:00
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void test_supports(const std::string & obj_filename,
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const sla::SupportConfig &supportcfg,
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SupportByproducts & out)
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{
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using namespace Slic3r;
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TriangleMesh mesh = load_model(obj_filename);
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ASSERT_FALSE(mesh.empty());
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TriangleMeshSlicer slicer{&mesh};
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2019-09-26 07:42:08 +00:00
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auto bb = mesh.bounding_box();
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double zmin = bb.min.z();
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double zmax = bb.max.z();
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double gnd = zmin - supportcfg.object_elevation_mm;
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auto layer_h = 0.05f;
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2019-09-24 13:24:47 +00:00
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out.slicegrid = grid(float(gnd), float(zmax), layer_h);
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slicer.slice(out.slicegrid , CLOSING_RADIUS, &out.model_slices, []{});
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// Create the special index-triangle mesh with spatial indexing which
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// is the input of the support point and support mesh generators
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sla::EigenMesh3D emesh{mesh};
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// Create the support point generator
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sla::SLAAutoSupports::Config autogencfg;
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autogencfg.head_diameter = float(2 * supportcfg.head_front_radius_mm);
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sla::SLAAutoSupports point_gen{emesh, out.model_slices, out.slicegrid,
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autogencfg, [] {}, [](int) {}};
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// Get the calculated support points.
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std::vector<sla::SupportPoint> support_points = point_gen.output();
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int validityflags = ASSUME_NO_REPAIR;
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// If there is no elevation, support points shall be removed from the
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// bottom of the object.
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if (supportcfg.object_elevation_mm < EPSILON) {
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sla::remove_bottom_points(support_points, zmin,
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supportcfg.base_height_mm);
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} else {
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// Should be support points at least on the bottom of the model
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ASSERT_FALSE(support_points.empty());
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// Also the support mesh should not be empty.
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validityflags |= ASSUME_NO_EMPTY;
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}
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// Generate the actual support tree
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sla::SupportTreeBuilder treebuilder;
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treebuilder.build(sla::SupportableMesh{emesh, support_points, supportcfg});
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check_support_tree_integrity(treebuilder, supportcfg);
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2019-09-26 07:42:08 +00:00
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const TriangleMesh &output_mesh = treebuilder.retrieve_mesh();
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check_validity(output_mesh, validityflags);
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// Quick check if the dimensions and placement of supports are correct
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auto obb = output_mesh.bounding_box();
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ASSERT_DOUBLE_EQ(obb.min.z(), zmin - supportcfg.object_elevation_mm);
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ASSERT_LE(obb.max.z(), zmax);
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// Move out the support tree into the byproducts, we can examine it further
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// in various tests.
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out.supporttree = std::move(treebuilder);
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}
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void test_supports(const std::string & obj_filename,
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const sla::SupportConfig &supportcfg = {})
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{
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SupportByproducts byproducts;
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test_supports(obj_filename, supportcfg, byproducts);
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}
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void test_support_model_collision(
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const std::string & obj_filename,
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const sla::SupportConfig &input_supportcfg = {})
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{
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SupportByproducts byproducts;
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sla::SupportConfig supportcfg = input_supportcfg;
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// Set head penetration to a small negative value which should ensure that
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// the supports will not touch the model body.
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supportcfg.head_penetration_mm = -0.1;
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test_supports(obj_filename, supportcfg, byproducts);
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// Slice the support mesh given the slice grid of the model.
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std::vector<ExPolygons> support_slices =
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byproducts.supporttree.slice(byproducts.slicegrid, CLOSING_RADIUS);
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// The slices originate from the same slice grid so the numbers must match
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ASSERT_EQ(support_slices.size(), byproducts.model_slices.size());
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bool notouch = true;
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for (size_t n = 0; notouch && n < support_slices.size(); ++n) {
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const ExPolygons &sup_slice = support_slices[n];
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const ExPolygons &mod_slice = byproducts.model_slices[n];
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Polygons intersections = intersection(sup_slice, mod_slice);
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notouch = notouch && intersections.empty();
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}
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ASSERT_TRUE(notouch);
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}
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const char * const BELOW_PAD_TEST_OBJECTS[] = {
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"20mm_cube.obj",
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"V.obj",
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};
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const char * const AROUND_PAD_TEST_OBJECTS[] = {
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"20mm_cube.obj",
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"V.obj",
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"frog_legs.obj",
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"cube_with_concave_hole_enlarged.obj",
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};
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const char *const SUPPORT_TEST_MODELS[] = {
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"cube_with_concave_hole_enlarged_standing.obj",
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};
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} // namespace
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2019-09-26 07:42:08 +00:00
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template <class I, class II> void test_pairhash()
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{
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std::map<II, std::pair<I, I> > ints;
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for (I i = 0; i < 1000; ++i)
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for (I j = 0; j < 1000; ++j) {
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if (j != i) {
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II hash_ij = sla::pairhash<I, II>(i, j);
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II hash_ji = sla::pairhash<I, II>(j, i);
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ASSERT_EQ(hash_ij, hash_ji);
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auto it = ints.find(hash_ij);
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if (it != ints.end()) {
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ASSERT_TRUE(
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(it->second.first == i && it->second.second == j) ||
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(it->second.first == j && it->second.second == i));
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} else ints[hash_ij] = std::make_pair(i, j);
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}
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}
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}
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TEST(SLASupportGeneration, PillarPairHashShouldBeUnique) {
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test_pairhash<int, long>();
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test_pairhash<unsigned, unsigned>();
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test_pairhash<unsigned, unsigned long>();
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}
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2019-09-24 13:24:47 +00:00
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TEST(SLASupportGeneration, FlatPadGeometryIsValid) {
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sla::PadConfig padcfg;
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// Disable wings
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padcfg.wall_height_mm = .0;
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for (auto &fname : BELOW_PAD_TEST_OBJECTS) test_pad(fname, padcfg);
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}
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TEST(SLASupportGeneration, WingedPadGeometryIsValid) {
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sla::PadConfig padcfg;
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// Add some wings to the pad to test the cavity
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padcfg.wall_height_mm = 1.;
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for (auto &fname : BELOW_PAD_TEST_OBJECTS) test_pad(fname, padcfg);
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}
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TEST(SLASupportGeneration, FlatPadAroundObjectIsValid) {
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sla::PadConfig padcfg;
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// Add some wings to the pad to test the cavity
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padcfg.wall_height_mm = 0.;
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// padcfg.embed_object.stick_stride_mm = 0.;
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padcfg.embed_object.enabled = true;
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padcfg.embed_object.everywhere = true;
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for (auto &fname : AROUND_PAD_TEST_OBJECTS) test_pad(fname, padcfg);
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}
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TEST(SLASupportGeneration, WingedPadAroundObjectIsValid) {
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sla::PadConfig padcfg;
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// Add some wings to the pad to test the cavity
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padcfg.wall_height_mm = 1.;
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padcfg.embed_object.enabled = true;
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padcfg.embed_object.everywhere = true;
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for (auto &fname : AROUND_PAD_TEST_OBJECTS) test_pad(fname, padcfg);
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}
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TEST(SLASupportGeneration, ElevatedSupportGeometryIsValid) {
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sla::SupportConfig supportcfg;
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supportcfg.object_elevation_mm = 5.;
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for (auto fname : SUPPORT_TEST_MODELS) test_supports(fname);
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}
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TEST(SLASupportGeneration, FloorSupportGeometryIsValid) {
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sla::SupportConfig supportcfg;
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supportcfg.object_elevation_mm = 0;
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for (auto &fname: SUPPORT_TEST_MODELS) test_supports(fname, supportcfg);
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}
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TEST(SLASupportGeneration, SupportsDoNotPierceModel) {
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sla::SupportConfig supportcfg;
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|
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for (auto fname : SUPPORT_TEST_MODELS)
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|
|
test_support_model_collision(fname, supportcfg);
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|
}
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int main(int argc, char **argv) {
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::testing::InitGoogleTest(&argc, argv);
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|
return RUN_ALL_TESTS();
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|
|
|
}
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