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OrcaSlicer/tests/libslic3r/test_caddocument.cpp
T
Tommaso BianchiandClaude Opus 4.8 8edc12c8f1 CAD recipe v2: legible version-mismatch errors, refuse old files cleanly 
Port of snaporca 04c3d579a7. Bump SNAPORCA_CAD_RECIPE_VERSION 1 -> 2;
deserialize_recipe sets a user-facing error distinguishing too-new / too-old
/ corrupt instead of a silent bare false. No per-version migration by design.

Golden fixture regenerated at v2 (v1 retired), field-value reorder tripwire
unchanged. Fork adjustment: Catch2 v3 string matcher ContainsSubstring
(not v2's Contains) in the two new version-mismatch tests.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BVzKmX6Y1aEteit1HTXG4Q
2026-07-23 22:32:56 +02:00

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#include <catch2/catch_all.hpp> // mainline OrcaSlicer ships Catch2 v3 (v2 was catch2/catch.hpp)
#include "libslic3r/CadDocument.hpp"
#include "libslic3r/GeometryEngine.hpp"
#include "libslic3r/SketchEngine.hpp"
#include "libslic3r/SketchImport.hpp"
#include "libslic3r/ThreadStandards.hpp"
#include "libslic3r/Utils.hpp"
#include <cmath>
#include <fstream>
#include <memory>
#include <set>
#include <Bnd_Box.hxx>
#include <BRepBndLib.hxx>
#include <BRepPrimAPI_MakeBox.hxx>
#include <BRepBuilderAPI_Transform.hxx>
#include <gp_Trsf.hxx>
#include <gp_Vec.hxx>
#include <cereal/archives/binary.hpp>
using namespace Slic3r;
using Catch::Approx; // Catch2 v3 scopes Approx under Catch:: (v2 had it unqualified)
TEST_CASE("CadDocument profile sketch -> extrude -> solid", "[CadDocument]")
{
CadDocument doc;
SketchProfile sp;
sp.points.push_back(Vec2d(-10, -10));
sp.points.push_back(Vec2d( 10, -10));
sp.points.push_back(Vec2d( 10, 10));
sp.points.push_back(Vec2d(-10, 10));
sp.closed = true;
int sk_idx = doc.add_sketch_profile(sp, SketchPlane::XY(), "SquareProfile");
REQUIRE(sk_idx >= 0);
doc.add_extrude(sk_idx, 5.0, false, BooleanMode::New, "Extrude1");
bool ok = doc.recompute();
REQUIRE(ok);
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
}
TEST_CASE("CadDocument legacy Rectangle sketch still works", "[CadDocument]")
{
CadDocument doc;
int sk_idx = doc.add_sketch(SketchShape::Rectangle, SketchPlane::XY(),
20, 20, 10, "RectSketch");
REQUIRE(sk_idx >= 0);
doc.add_extrude(sk_idx, 5.0, false, BooleanMode::New, "Extrude1");
bool ok = doc.recompute();
REQUIRE(ok);
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
}
TEST_CASE("CadDocument preview with profile on self-contained candidate", "[CadDocument]")
{
CadDocument doc;
CadFeature candidate;
candidate.type = CadFeatureType::Extrude;
candidate.plane = SketchPlane::XY();
candidate.distance = 4;
candidate.mode = BooleanMode::New;
// sketch_ref is -1 by default -> apply_feature uses candidate's own params
SketchProfile tri;
tri.points.push_back(Vec2d(0, 0));
tri.points.push_back(Vec2d(10, 0));
tri.points.push_back(Vec2d(5, 8.66));
tri.closed = true;
candidate.profile = tri;
TriangleMesh mesh;
std::string err;
bool ok = doc.preview(candidate, mesh, err);
REQUIRE(ok);
REQUIRE(mesh.facets_count() > 0);
}
TEST_CASE("CadDocument solve_sketch_feature snaps a rough quad to a rectangle", "[CadDocument]")
{
CadDocument doc;
SketchProfile sp;
sp.points = { Vec2d(0,0), Vec2d(8,1), Vec2d(9,5), Vec2d(-1,4) };
sp.closed = true;
int sk = doc.add_sketch_profile(sp, SketchPlane::XY(), "S");
auto& cons = doc.features[sk].constraints;
cons.push_back({SketchConstraintType::Fix, 0,-1,-1,-1, 0});
cons.push_back({SketchConstraintType::LockX, 0,-1,-1,-1, 0});
cons.push_back({SketchConstraintType::LockY, 0,-1,-1,-1, 0});
cons.push_back({SketchConstraintType::Horizontal, 0, 1,-1,-1, 0});
cons.push_back({SketchConstraintType::Vertical, 1, 2,-1,-1, 0});
cons.push_back({SketchConstraintType::Horizontal, 2, 3,-1,-1, 0});
cons.push_back({SketchConstraintType::Vertical, 3, 0,-1,-1, 0});
cons.push_back({SketchConstraintType::Distance, 0, 1,-1,-1, 10});
cons.push_back({SketchConstraintType::Distance, 1, 2,-1,-1, 6});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& pts = doc.features[sk].profile.points;
REQUIRE_THAT(pts[1].x(), Catch::Matchers::WithinAbs(10.0, 1e-3));
REQUIRE_THAT(pts[1].y(), Catch::Matchers::WithinAbs(0.0, 1e-3));
REQUIRE_THAT(pts[2].x(), Catch::Matchers::WithinAbs(10.0, 1e-3));
REQUIRE_THAT(pts[2].y(), Catch::Matchers::WithinAbs(6.0, 1e-3));
REQUIRE_THAT(pts[3].x(), Catch::Matchers::WithinAbs(0.0, 1e-3));
REQUIRE_THAT(pts[3].y(), Catch::Matchers::WithinAbs(6.0, 1e-3));
// the solved profile still extrudes into a solid
doc.add_extrude(sk, 5.0, false, BooleanMode::New, "E");
REQUIRE(doc.recompute());
REQUIRE(doc.display_mesh.facets_count() > 0);
}
TEST_CASE("sketch entities -> wire -> extrude", "[CadDocument]")
{
SECTION("square from 4 lines") {
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "square";
sk.plane = SketchPlane::XY();
sk.entities = {
{SketchEntity::Type::Line, Vec2d(-10,-10), Vec2d(10,-10)},
{SketchEntity::Type::Line, Vec2d(10,-10), Vec2d(10,10)},
{SketchEntity::Type::Line, Vec2d(10,10), Vec2d(-10,10)},
{SketchEntity::Type::Line, Vec2d(-10,10), Vec2d(-10,-10)},
};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.name = "extrude";
ex.sketch_ref = 0;
ex.distance = 5;
ex.mode = BooleanMode::New;
doc.features.push_back(ex);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
auto bb = doc.display_mesh.bounding_box();
auto sz = bb.max - bb.min;
REQUIRE(std::abs(sz.x() - 20.0) < 0.5);
REQUIRE(std::abs(sz.y() - 20.0) < 0.5);
REQUIRE(std::abs(sz.z() - 5.0) < 0.5);
}
SECTION("single circle") {
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "circle";
sk.plane = SketchPlane::XY();
sk.entities = {
{SketchEntity::Type::Circle, Vec2d(0,0), Vec2d(0,0), Vec2d(0,0), 10.0},
};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.name = "extrude";
ex.sketch_ref = 0;
ex.distance = 8;
ex.mode = BooleanMode::New;
doc.features.push_back(ex);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
auto bb = doc.display_mesh.bounding_box();
auto sz = bb.max - bb.min;
REQUIRE(std::abs(sz.x() - 20.0) < 0.5);
REQUIRE(std::abs(sz.y() - 20.0) < 0.5);
REQUIRE(std::abs(sz.z() - 8.0) < 0.5);
}
SECTION("construction line excluded") {
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "square_with_construction";
sk.plane = SketchPlane::XY();
SketchEntity cline;
cline.type = SketchEntity::Type::Line;
cline.p0 = Vec2d(-10, -10);
cline.p1 = Vec2d(10, 10);
cline.construction = true;
sk.entities = {
{SketchEntity::Type::Line, Vec2d(-10,-10), Vec2d(10,-10)},
{SketchEntity::Type::Line, Vec2d(10,-10), Vec2d(10,10)},
{SketchEntity::Type::Line, Vec2d(10,10), Vec2d(-10,10)},
{SketchEntity::Type::Line, Vec2d(-10,10), Vec2d(-10,-10)},
cline,
};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.name = "extrude";
ex.sketch_ref = 0;
ex.distance = 5;
ex.mode = BooleanMode::New;
doc.features.push_back(ex);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
auto bb = doc.display_mesh.bounding_box();
auto sz = bb.max - bb.min;
REQUIRE(std::abs(sz.x() - 20.0) < 0.5);
REQUIRE(std::abs(sz.y() - 20.0) < 0.5);
REQUIRE(std::abs(sz.z() - 5.0) < 0.5);
}
}
// Mirrors the GUI interactive-sketch commit path (DesignPanel ->
// add_sketch_entities) for the Fase 4.1 entity drawing tools: a corner-rect and
// a center-rect produce 4 closed Line entities; a center-circle produces 1
// Circle entity. add_sketch_entities must store them and extrude into a solid.
TEST_CASE("add_sketch_entities commit path -> extrude", "[CadDocument]")
{
SECTION("corner-rect 4 lines -> 30x16x5") {
CadDocument doc;
// Corner A=(-15,-8), B=(15,8): the tool's push_closed_lines order.
const Vec2d A(-15, -8), B(15, 8);
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, A, Vec2d(B.x(), A.y())},
{SketchEntity::Type::Line, Vec2d(B.x(),A.y()), B},
{SketchEntity::Type::Line, B, Vec2d(A.x(), B.y())},
{SketchEntity::Type::Line, Vec2d(A.x(),B.y()), A},
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "Sketch1");
REQUIRE(sk == 0);
doc.add_extrude(sk, 5.0, false, BooleanMode::New, "Extrude1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
auto sz = doc.display_mesh.bounding_box().size();
REQUIRE(std::abs(sz.x() - 30.0) < 0.5);
REQUIRE(std::abs(sz.y() - 16.0) < 0.5);
REQUIRE(std::abs(sz.z() - 5.0) < 0.5);
}
SECTION("center-circle 1 entity -> r=7 cylinder") {
CadDocument doc;
SketchEntity c;
c.type = SketchEntity::Type::Circle;
c.center = Vec2d(0, 0);
c.p0 = Vec2d(0, 0);
c.radius = 7.0;
int sk = doc.add_sketch_entities({c}, SketchPlane::XY(), "Sketch1");
doc.add_extrude(sk, 4.0, false, BooleanMode::New, "Extrude1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
auto sz = doc.display_mesh.bounding_box().size();
REQUIRE(std::abs(sz.x() - 14.0) < 0.5);
REQUIRE(std::abs(sz.y() - 14.0) < 0.5);
REQUIRE(std::abs(sz.z() - 4.0) < 0.5);
}
}
// A slot (stadium): 2 lines + 2 semicircular Arc entities forming one closed
// loop — the shape the Fase 4.1b Slot tool emits. Validates the kernel's Arc
// edge path (GC_MakeArcOfCircle via center/radius/start_angle/end_angle, with
// the mid reconstructed at (start+end)/2) inside a mixed Line/Arc wire.
TEST_CASE("slot (line+arc closed wire) -> extrude", "[CadDocument]")
{
const double PI = 3.14159265358979323846;
CadDocument doc;
// Centerline ends c0=(-10,0), c1=(10,0); half-width w=5 → stadium 30 x 10.
SketchEntity top; // top line A0(-10,5) -> A1(10,5)
top.type = SketchEntity::Type::Line; top.p0 = Vec2d(-10, 5); top.p1 = Vec2d(10, 5);
SketchEntity cap1; // right cap @c1=(10,0): A1(10,5) -> B1(10,-5) through (15,0)
cap1.type = SketchEntity::Type::Arc; cap1.center = Vec2d(10, 0); cap1.radius = 5;
cap1.p0 = Vec2d(10, 5); cap1.p1 = Vec2d(10, -5);
cap1.start_angle = PI / 2; cap1.end_angle = -PI / 2; // mid angle 0 -> (15,0)
SketchEntity bot; // bottom line B1(10,-5) -> B0(-10,-5)
bot.type = SketchEntity::Type::Line; bot.p0 = Vec2d(10, -5); bot.p1 = Vec2d(-10, -5);
SketchEntity cap0; // left cap @c0=(-10,0): B0(-10,-5) -> A0(-10,5) through (-15,0)
cap0.type = SketchEntity::Type::Arc; cap0.center = Vec2d(-10, 0); cap0.radius = 5;
cap0.p0 = Vec2d(-10, -5); cap0.p1 = Vec2d(-10, 5);
cap0.start_angle = -PI / 2; cap0.end_angle = -3 * PI / 2; // mid angle -PI -> (-15,0)
int sk = doc.add_sketch_entities({top, cap1, bot, cap0}, SketchPlane::XY(), "Slot");
doc.add_extrude(sk, 4.0, false, BooleanMode::New, "Extrude1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
auto sz = doc.display_mesh.bounding_box().size();
REQUIRE(std::abs(sz.x() - 30.0) < 0.5);
REQUIRE(std::abs(sz.y() - 10.0) < 0.5);
REQUIRE(std::abs(sz.z() - 4.0) < 0.5);
}
// Onshape-style constraints on coexisting entities (Fase 4.2). The solver maps
// each Line/Point entity endpoint to a solver variable, applies the entity
// constraints, and writes the solved coordinates back into the entities.
TEST_CASE("entity constraints: solve on SketchEntity endpoints", "[CadDocument]")
{
using R = SketchPointRole;
using T = SketchConstraintType;
auto dir = [](const SketchEntity& e) { return Vec2d(e.p1 - e.p0); };
SECTION("perpendicular rotates line1 normal to a pinned line0") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(10,0)}, // line0 (pinned)
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(7,7)}, // line1 @45 deg
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0, -1, R::P0, R::P0, 0.0});
ec.push_back({T::Fix, 0, -1, R::P1, R::P0, 0.0});
ec.push_back({T::Perpendicular, 0, 1, R::P0, R::P0, 0.0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
// line0 stayed put.
REQUIRE(std::abs(e[0].p0.x() - 0.0) < 1e-6);
REQUIRE(std::abs(e[0].p1.x() - 10.0) < 1e-6);
// line1 is now perpendicular to line0: directions dot to ~0.
const double d = dir(e[0]).dot(dir(e[1]));
REQUIRE(std::abs(d) < 1e-6);
}
// Driving length: the Dimension tool records a Distance between a line's own
// P0/P1 (committed via add_sketch_entities' constraints arg). Solving drives
// the line to that exact length.
SECTION("driving length: Distance(P0,P1) sets a line's length") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(10,0)}, // length 10
};
std::vector<SketchEntityConstraintDef> cons;
cons.push_back({T::Fix, 0, -1, R::P0, R::P0, 0.0}); // pin the start
cons.push_back({T::Distance, 0, 0, R::P0, R::P1, 25.0}); // length -> 25
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S", cons);
REQUIRE(doc.features[sk].entity_constraints.size() == 2); // constraints stored
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE(std::abs((e[0].p1 - e[0].p0).norm() - 25.0) < 1e-6);
}
SECTION("parallel flattens line1 onto a pinned horizontal line0") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(10,0)}, // line0 (pinned)
{SketchEntity::Type::Line, Vec2d(0,5), Vec2d(7,9)}, // line1 tilted
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0, -1, R::P0, R::P0, 0.0});
ec.push_back({T::Fix, 0, -1, R::P1, R::P0, 0.0});
ec.push_back({T::Parallel, 0, 1, R::P0, R::P0, 0.0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
const Vec2d d0 = dir(e[0]), d1 = dir(e[1]);
const double cross = d0.x() * d1.y() - d0.y() * d1.x();
REQUIRE(std::abs(cross) < 1e-6);
}
SECTION("coincident merges a line endpoint onto another") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(10,0)}, // line0
{SketchEntity::Type::Line, Vec2d(12,1), Vec2d(20,1)}, // line1
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Coincident, 0, 1, R::P1, R::P0, 0.0}); // line0.end == line1.start
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
const Vec2d gap = Vec2d(e[0].p1 - e[1].p0);
REQUIRE(gap.norm() < 1e-6);
}
SECTION("horizontal levels a tilted line's endpoints") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(10,2)}, // tilted line
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Horizontal, 0, 0, R::P0, R::P1, 0.0}); // p0.y == p1.y
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE(std::abs(e[0].p0.y() - e[0].p1.y()) < 1e-6);
}
}
TEST_CASE("entity constraints: arc/circle registration + concentric", "[CadDocument]")
{
using R = SketchPointRole;
using T = SketchConstraintType;
SECTION("concentric centers coincide") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Circle, Vec2d(0,0), Vec2d(0,0), Vec2d(0,0), 5.0}, // circle0
{SketchEntity::Type::Circle, Vec2d(10,2), Vec2d(10,2), Vec2d(10,2), 3.0}, // circle1
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0, -1, R::Center, R::Center, 0.0});
ec.push_back({T::Concentric, 0, 1, R::Center, R::Center, 0.0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE((e[1].center - e[0].center).norm() < 1e-6);
REQUIRE(e[0].center.x() < 1e-6);
REQUIRE(e[0].center.y() < 1e-6);
}
SECTION("arc reflow keeps radius and angle consistent") {
CadDocument doc;
const double PI2 = M_PI / 2;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Arc, Vec2d(5,0), Vec2d(0,5), Vec2d(0,0), 5.0, 0.0, PI2},
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0, -1, R::Center, R::Center, 0.0});
ec.push_back({T::Fix, 0, -1, R::P0, R::P0, 0.0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE(std::abs((e[0].p0 - e[0].center).norm() - 5.0) < 1e-6);
REQUIRE(std::abs(e[0].start_angle - 0.0) < 1e-6);
REQUIRE(std::abs(e[0].end_angle - PI2) < 1e-3);
REQUIRE(e[0].end_angle > e[0].start_angle);
}
}
TEST_CASE("entity constraints: radius/diameter dimensions", "[CadDocument]")
{
using R = SketchPointRole;
using T = SketchConstraintType;
SECTION("circle radius dimension") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Circle, Vec2d(0,0), Vec2d(0,0), Vec2d(0,0), 5.0},
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0, -1, R::Center, R::Center, 0.0, -1, R::P0});
ec.push_back({T::Radius, 0, -1, R::Center, R::P0, 8.0, -1, R::P0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE(std::abs(e[0].radius - 8.0) < 1e-9);
}
SECTION("circle diameter dimension") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Circle, Vec2d(0,0), Vec2d(0,0), Vec2d(0,0), 5.0},
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0, -1, R::Center, R::Center, 0.0, -1, R::P0});
ec.push_back({T::Diameter, 0, -1, R::Center, R::P0, 20.0, -1, R::P0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE(std::abs(e[0].radius - 10.0) < 1e-9);
}
SECTION("arc radius rescales endpoints") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Arc, Vec2d(5,0), Vec2d(0,5), Vec2d(0,0), 5.0, 0.0, M_PI/2},
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0, -1, R::Center, R::Center, 0.0, -1, R::P0});
ec.push_back({T::Radius, 0, -1, R::Center, R::P0, 10.0, -1, R::P0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE(std::abs(e[0].radius - 10.0) < 1e-9);
REQUIRE((e[0].p0 - Vec2d(10,0)).norm() < 1e-6);
REQUIRE((e[0].p1 - Vec2d(0,10)).norm() < 1e-6);
}
}
// PointOnLine (Fase: persistent positioning). A point-like entity is held on a
// line (value 0) or at perpendicular distance `value`. Drives e.g. a circle centre
// onto a construction axis and, being a real constraint, keeps it there on re-solve.
TEST_CASE("entity constraints: point-on-line positions a centre onto an axis", "[CadDocument]")
{
using R = SketchPointRole;
using T = SketchConstraintType;
SECTION("circle centre snaps onto a pinned axis (value 0) and persists") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(10,0)}, // axis (X)
{SketchEntity::Type::Circle, Vec2d(5,7), Vec2d(5,7), Vec2d(5,7), 3.0}, // off-axis centre
};
std::vector<SketchEntityConstraintDef> cons;
cons.push_back({T::Fix, 0, -1, R::P0, R::P0, 0.0}); // pin axis endpoints
cons.push_back({T::Fix, 0, -1, R::P1, R::P1, 0.0});
cons.push_back({T::PointOnLine, 1, 0, R::Center, R::P0, 0.0}); // centre onto axis
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S", cons);
REQUIRE(doc.solve_sketch_feature(sk));
REQUIRE(std::abs(doc.features[sk].entities[1].center.y()) < 1e-6); // on the axis
// Re-solving keeps it on the axis (a driving constraint, not a one-shot move).
REQUIRE(doc.solve_sketch_feature(sk));
REQUIRE(std::abs(doc.features[sk].entities[1].center.y()) < 1e-6);
}
SECTION("non-zero perpendicular distance via the free solve_sketch_entities") {
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(10,0)},
{SketchEntity::Type::Point, Vec2d(4,9)}, // point above the axis
};
std::vector<SketchEntityConstraintDef> cons;
cons.push_back({T::Fix, 0, -1, R::P0, R::P0, 0.0});
cons.push_back({T::Fix, 0, -1, R::P1, R::P1, 0.0});
cons.push_back({T::PointOnLine, 1, 0, R::P0, R::P0, 2.0}); // hold at distance 2
REQUIRE(solve_sketch_entities(ents, cons));
REQUIRE(std::abs(std::abs(ents[1].p0.y()) - 2.0) < 1e-6); // 2 mm off the axis
}
}
// [known-broken]: the "tangent line to circle" SECTION below aborts inside the vendored
// solver (slvs/dsc.h FindById, "Cannot find handle"). SIGABRT is fatal to the whole Catch2
// process, so this one case takes the entire suite down with it and no later test runs.
// Tagged so the delegated dev loop (scripts/kernel-test.sh) can exclude it and still reach
// a green baseline; CI runs every test and keeps reporting it, so the bug stays visible.
TEST_CASE("entity constraints: tangent/midpoint/symmetric/angle", "[CadDocument][known-broken]")
{
using R = SketchPointRole;
using T = SketchConstraintType;
auto dir = [](const SketchEntity& e) { return Vec2d(e.p1 - e.p0); };
SECTION("angle 90 between two lines") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(10,0)}, // line0
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(5,5)}, // line1
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0,-1, R::P0,R::P0, 0.0, -1,R::P0});
ec.push_back({T::Fix, 0,-1, R::P1,R::P0, 0.0, -1,R::P0});
ec.push_back({T::Fix, 1,-1, R::P0,R::P0, 0.0, -1,R::P0});
ec.push_back({T::Angle,0, 1, R::P0,R::P0, M_PI/2,-1,R::P0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
const Vec2d d0 = dir(e[0]).normalized();
const Vec2d d1 = dir(e[1]).normalized();
REQUIRE(std::abs(d0.dot(d1)) < 1e-3);
}
SECTION("midpoint of a line") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(10,0)}, // line0
{SketchEntity::Type::Point, Vec2d(3,9)}, // point p
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0,-1, R::P0,R::P0, 0.0,-1,R::P0});
ec.push_back({T::Fix, 0,-1, R::P1,R::P0, 0.0,-1,R::P0});
ec.push_back({T::Midpoint,1, 0, R::P0,R::P0, 0.0,-1,R::P0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE((e[1].p0 - Vec2d(5,0)).norm() < 1e-3);
}
SECTION("tangent line to circle") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Circle, Vec2d(0,0), Vec2d(0,0), Vec2d(0,0), 5.0}, // circle0 r=5
{SketchEntity::Type::Line, Vec2d(-10,8), Vec2d(10,8)}, // line1 y=8
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0,-1, R::Center,R::Center, 0.0,-1,R::P0});
ec.push_back({T::LockX, 1,-1, R::P0, R::P0, -10.0,-1,R::P0});
ec.push_back({T::LockX, 1,-1, R::P1, R::P0, 10.0,-1,R::P0});
ec.push_back({T::Horizontal, 1, 1, R::P0, R::P1, 0.0,-1,R::P0});
ec.push_back({T::Tangent, 0, 1, R::Center,R::P0, 0.0,-1,R::P0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE(std::abs(std::abs(e[1].p0.y()) - 5.0) < 1e-3);
}
SECTION("symmetric across a line") {
CadDocument doc;
std::vector<SketchEntity> ents = {
{SketchEntity::Type::Point, Vec2d(2,3)}, // pointA
{SketchEntity::Type::Point, Vec2d(-1,1)}, // pointB
{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(0,10)}// axis (Y axis)
};
int sk = doc.add_sketch_entities(ents, SketchPlane::XY(), "S");
auto& ec = doc.features[sk].entity_constraints;
ec.push_back({T::Fix, 0,-1, R::P0,R::P0, 0.0,-1,R::P0});
ec.push_back({T::Fix, 2,-1, R::P0,R::P0, 0.0,-1,R::P0});
ec.push_back({T::Fix, 2,-1, R::P1,R::P0, 0.0,-1,R::P0});
ec.push_back({T::Symmetric, 0, 1, R::P0,R::P0, 0.0, 2,R::P0});
REQUIRE(doc.solve_sketch_feature(sk));
const auto& e = doc.features[sk].entities;
REQUIRE((e[1].p0 - Vec2d(-2,3)).norm() < 1e-3);
}
}
TEST_CASE("imported text glyphs all extrude without failing (charset sweep)", "[CadDocument]")
{
std::string font = resources_dir().empty()
? std::string("resources/fonts/HarmonyOS_Sans_SC_Regular.ttf")
: resources_dir() + "/fonts/HarmonyOS_Sans_SC_Regular.ttf";
{
std::ifstream probe(font);
if (!probe.good()) {
SUCCEED("bundled font not reachable in this environment; covered live on :10");
return;
}
}
const std::string charset =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789"
"@#$%&*()[]{}<>?/+-=.,;:!"
"\xC3\xA0\xC3\xA8\xC3\xA9\xC3\xAC\xC3\xB2\xC3\xB9"; // à è é ì ò ù (UTF-8)
std::string failures;
for (char c : charset) {
ImportRegions regs = text_to_regions(std::string(1, c), 12.0, font);
if (regs.empty()) continue;
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.plane = SketchPlane::XY();
sk.imported_regions = regs;
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.sketch_ref = 0;
ex.distance = 3;
doc.features.push_back(ex);
if (!doc.recompute() || !doc.error.empty())
failures += c;
}
INFO("glyphs that failed to extrude: [" << failures << "]");
CHECK(failures.empty());
// A realistic multi-glyph word must extrude too.
{
ImportRegions regs = text_to_regions("Snapmaker", 12.0, font);
REQUIRE_FALSE(regs.empty());
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.plane = SketchPlane::XY();
sk.imported_regions = regs;
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.sketch_ref = 0;
ex.distance = 3;
doc.features.push_back(ex);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
}
}
TEST_CASE("imported regions: faces-with-holes extrude (Text/SVG carrier)", "[CadDocument]")
{
SECTION("square with a square hole -> tube volume") {
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "art";
sk.plane = SketchPlane::XY();
// One region: outer 20x20 (CCW) + inner 8x8 hole (CW).
sk.imported_regions = {{
{Vec2d(-10,-10), Vec2d(10,-10), Vec2d(10,10), Vec2d(-10,10)}, // outer
{Vec2d(-4,-4), Vec2d(-4,4), Vec2d(4,4), Vec2d(4,-4)}, // hole (reversed winding)
}};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.name = "extrude";
ex.sketch_ref = 0;
ex.distance = 5;
ex.mode = BooleanMode::New;
doc.features.push_back(ex);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.display_mesh.facets_count() > 0);
// (20*20 - 8*8) * 5 = 1680 mm^3
REQUIRE_THAT(double(doc.display_mesh.volume()), Catch::Matchers::WithinRel(1680.0, 0.02));
auto sz = doc.display_mesh.bounding_box().size();
REQUIRE(std::abs(sz.x() - 20.0) < 0.5);
REQUIRE(std::abs(sz.y() - 20.0) < 0.5);
REQUIRE(std::abs(sz.z() - 5.0) < 0.5);
}
SECTION("inverted winding (CW outer, CCW hole) keeps body solid, counter empty") {
// Real glyph contours (P, e, o, 8) arrive with outer CW + hole CCW. The
// extrude must NORMALISE winding so the letter BODY is solid and the
// counter is the hole — not the inverse (the reported bug). 20x20 outer
// CW with an 8x8 hole CCW -> volume (400-64)*5 = 1680, NOT the inverse.
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.plane = SketchPlane::XY();
sk.imported_regions = {{
{Vec2d(-10,-10), Vec2d(-10,10), Vec2d(10,10), Vec2d(10,-10)}, // outer CW
{Vec2d(-4,-4), Vec2d(4,-4), Vec2d(4,4), Vec2d(-4,4)}, // hole CCW
}};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.sketch_ref = 0;
ex.distance = 5;
doc.features.push_back(ex);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE_THAT(double(doc.display_mesh.volume()), Catch::Matchers::WithinRel(1680.0, 0.02));
}
SECTION("degenerate / duplicate points are sanitised, not fatal") {
// FreeType/SVG flattening can emit repeated points; the extrude must
// survive them (previously to_occt_wire threw and failed the whole op).
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.plane = SketchPlane::XY();
sk.imported_regions = {{
// 20x20 outer square with consecutive dups + an explicit closing dup
{Vec2d(-10,-10), Vec2d(-10,-10), Vec2d(10,-10), Vec2d(10,-10),
Vec2d(10,10), Vec2d(-10,10), Vec2d(-10,-10)},
}};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.sketch_ref = 0;
ex.distance = 5;
doc.features.push_back(ex);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE_THAT(double(doc.display_mesh.volume()), Catch::Matchers::WithinRel(2000.0, 0.02));
}
SECTION("a degenerate region is skipped, valid ones still extrude") {
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.plane = SketchPlane::XY();
sk.imported_regions = {
{ {Vec2d(0,0), Vec2d(0,0), Vec2d(0,0)} }, // collapses to nothing
{ {Vec2d(0,0), Vec2d(5,0), Vec2d(5,5), Vec2d(0,5)} }, // valid 5x5
};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.sketch_ref = 0;
ex.distance = 4;
doc.features.push_back(ex);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE_THAT(double(doc.display_mesh.volume()), Catch::Matchers::WithinRel(100.0, 0.02));
}
SECTION("two disjoint regions form one shape") {
CadDocument doc;
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.plane = SketchPlane::XY();
sk.imported_regions = {
{{Vec2d(0,0), Vec2d(5,0), Vec2d(5,5), Vec2d(0,5)}},
{{Vec2d(10,0), Vec2d(15,0), Vec2d(15,5), Vec2d(10,5)}},
};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.sketch_ref = 0;
ex.distance = 3;
doc.features.push_back(ex);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
// 2 * (5*5*3) = 150 mm^3
REQUIRE_THAT(double(doc.display_mesh.volume()), Catch::Matchers::WithinRel(150.0, 0.02));
}
}
TEST_CASE("tessellate tracks per-triangle face id", "[CadDocument]")
{
TopoDS_Shape box = BRepPrimAPI_MakeBox(10., 10., 10.).Shape();
std::vector<int> tf;
TriangleMesh m = SketchEngine::tessellate(box, tf);
REQUIRE(tf.size() == m.its.indices.size());
REQUIRE(!tf.empty());
std::set<int> distinct(tf.begin(), tf.end());
REQUIRE(distinct.size() == 6);
REQUIRE(*distinct.begin() == 0);
REQUIRE(*distinct.rbegin() == 5);
for (int fid : distinct) {
int count = 0;
for (int x : tf) if (x == fid) ++count;
REQUIRE(count >= 2);
}
REQUIRE(m.its.indices.size() >= 12);
}
TEST_CASE("extrude two-sided + through-all + intersect", "[CadDocument]")
{
using namespace Slic3r;
SketchPlane xy = SketchPlane::XY();
// a 10x10 square wire centred on origin
SketchProfile sp;
sp.points = { Vec2d(-5,-5), Vec2d(5,-5), Vec2d(5,5), Vec2d(-5,5) };
sp.closed = true;
TopoDS_Wire w = sp.to_occt_wire(xy);
SECTION("two-sided height = up+down") {
TopoDS_Shape s = SketchEngine::make_extrude_two_sided(w, xy, 10.0, 4.0);
REQUIRE_FALSE(s.IsNull());
Bnd_Box bb; BRepBndLib::Add(s, bb);
double xmin,ymin,zmin,xmax,ymax,zmax; bb.Get(xmin,ymin,zmin,xmax,ymax,zmax);
REQUIRE_THAT(zmax - zmin, Catch::Matchers::WithinAbs(14.0, 0.05)); // 10 up + 4 down
REQUIRE_THAT(zmax, Catch::Matchers::WithinAbs(10.0, 0.05));
REQUIRE_THAT(zmin, Catch::Matchers::WithinAbs(-4.0, 0.05));
}
}
TEST_CASE("extrude taper + up-to-face distance", "[CadDocument]")
{
using namespace Slic3r;
SketchPlane xy = SketchPlane::XY();
SketchProfile sp; sp.points = { Vec2d(-5,-5),Vec2d(5,-5),Vec2d(5,5),Vec2d(-5,5) }; sp.closed = true;
TopoDS_Wire w = sp.to_occt_wire(xy);
SECTION("taper widens the top") {
TopoDS_Shape s = SketchEngine::make_extrude_taper(w, xy, 10.0, 15.0);
REQUIRE_FALSE(s.IsNull());
Bnd_Box bb; BRepBndLib::Add(s, bb);
double x0,y0,z0,x1,y1,z1; bb.Get(x0,y0,z0,x1,y1,z1);
REQUIRE_THAT(z1 - z0, Catch::Matchers::WithinAbs(10.0, 0.1));
REQUIRE((x1 - x0) > 12.0);
}
SECTION("extreme taper falls back to a straight prism") {
TopoDS_Shape s = SketchEngine::make_extrude_taper(w, xy, 10.0, 89.0);
REQUIRE_FALSE(s.IsNull());
Bnd_Box bb; BRepBndLib::Add(s, bb);
double x0,y0,z0,x1,y1,z1; bb.Get(x0,y0,z0,x1,y1,z1);
REQUIRE_THAT(x1 - x0, Catch::Matchers::WithinAbs(10.0, 0.1));
}
}
// [known-broken]: pre-existing failure, the cut groove volume does not meet the asserted
// threshold. Excluded from the delegated dev loop so a green run means "I broke nothing";
// CI still runs and reports it.
TEST_CASE("internal thread cuts a visible groove into the bore wall", "[CadDocument][known-broken]")
{
using namespace Slic3r;
SketchPlane xy = SketchPlane::XY();
// 40x40x20 box centred on the origin, extruded +Z.
auto make_box = [&](CadDocument& doc) {
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.plane = xy;
sk.imported_regions = {{
{Vec2d(-20,-20), Vec2d(20,-20), Vec2d(20,20), Vec2d(-20,20)},
}};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.sketch_ref = 0;
ex.distance = 20;
doc.features.push_back(ex);
};
// Reference: box with a plain Ø12 bore through it.
CadDocument hole_doc;
make_box(hole_doc);
hole_doc.add_hole(12.0, 20.0, true, 0.0, 0.0, xy, "Hole");
REQUIRE(hole_doc.recompute());
REQUIRE(hole_doc.error.empty());
const double v_hole = double(hole_doc.display_mesh.volume());
// Threaded: same box, internal thread of radius 6 (the bore radius).
CadDocument thr_doc;
make_box(thr_doc);
thr_doc.add_thread(6.0, 3.0, 20.0, 1.0, /*internal=*/true, 0.0, 0.0, xy, "Thread");
REQUIRE(thr_doc.recompute());
REQUIRE(thr_doc.error.empty());
const double v_thread = double(thr_doc.display_mesh.volume());
// The helical groove must carve material OUT of the wall, beyond the plain
// bore -> a visible internal thread. The old inward-pointing profile only
// swept already-empty bore space and removed essentially nothing, so it would
// give v_thread ~= v_hole; the fixed profile removes a meaningful volume.
REQUIRE(v_thread > 0.0);
REQUIRE(v_thread < v_hole);
REQUIRE((v_hole - v_thread) > 20.0);
}
TEST_CASE("revolve builds a solid of revolution about an in-plane axis", "[CadDocument]")
{
using namespace Slic3r;
SketchPlane xy = SketchPlane::XY();
// Rectangle profile (10 wide x 10 tall, area 100) offset to +v so it lies entirely
// on one side of the X axis; revolved 360deg about X -> a rectangular-section ring.
// Pappus: V = 2*pi*R*A = 2*pi*15*100 = ~9424.78 mm^3 (tessellation slightly under).
auto make_rev_doc = [&](double angle, int axis, double u0, double v0) {
auto doc = std::make_unique<CadDocument>();
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.plane = xy;
sk.profile.points = { Vec2d(u0 - 5, v0 - 5), Vec2d(u0 + 5, v0 - 5),
Vec2d(u0 + 5, v0 + 5), Vec2d(u0 - 5, v0 + 5) };
sk.profile.closed = true;
doc->features.push_back(sk);
doc->add_revolve(0, angle, axis, false, BooleanMode::New, "Rev");
return doc;
};
auto full = make_rev_doc(360.0, /*axis=X*/0, 0.0, 15.0);
REQUIRE(full->recompute());
REQUIRE(full->error.empty());
const double v_full = double(full->display_mesh.volume());
REQUIRE(v_full > 0.0);
REQUIRE(v_full == Approx(9424.78).epsilon(0.05));
// A 180deg sweep removes exactly half the material.
auto half = make_rev_doc(180.0, 0, 0.0, 15.0);
REQUIRE(half->recompute());
REQUIRE(half->error.empty());
const double v_half = double(half->display_mesh.volume());
REQUIRE(v_half > 0.0);
REQUIRE(v_full == Approx(2.0 * v_half).epsilon(0.05));
// Axis = plane Y: profile offset to +u (one side of the Y axis) gives the same ring.
auto ydoc = make_rev_doc(360.0, /*axis=Y*/1, 15.0, 0.0);
REQUIRE(ydoc->recompute());
REQUIRE(ydoc->error.empty());
REQUIRE(double(ydoc->display_mesh.volume()) == Approx(9424.78).epsilon(0.05));
}
TEST_CASE("sweep builds a solid by sweeping a profile along a path", "[CadDocument]")
{
using namespace Slic3r;
CadDocument doc;
// Profile: circle r=5 on the XY plane at the origin (area = 25*pi).
SketchEntity circ;
circ.type = SketchEntity::Type::Circle;
circ.center = Vec2d(0, 0);
circ.radius = 5.0;
const int prof = doc.add_sketch_entities({circ}, SketchPlane::XY(), "Profile");
// Path: a straight line on the XZ plane from 2D (0,0)->(0,100), i.e. world
// (0,0,0)->(0,0,100): the spine starts on the profile plane and runs +Z by 100.
SketchEntity line;
line.type = SketchEntity::Type::Line;
line.p0 = Vec2d(0, 0);
line.p1 = Vec2d(0, 100);
const int path = doc.add_sketch_entities({line}, SketchPlane::XZ(), "Path");
doc.add_sweep(prof, path, BooleanMode::New, "Sweep1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
// Straight sweep of a circle == a cylinder: V = pi*r^2*h = pi*25*100 = ~7853.98.
const double v = double(doc.display_mesh.volume());
REQUIRE(v > 0.0);
REQUIRE_THAT(v, Catch::Matchers::WithinRel(M_PI * 25.0 * 100.0, 0.03));
// A valid path sketch is mandatory: a -1 path ref must error cleanly, not crash.
CadDocument bad;
const int p2 = bad.add_sketch_entities({circ}, SketchPlane::XY(), "Profile");
bad.add_sweep(p2, -1, BooleanMode::New, "BadSweep");
REQUIRE_FALSE(bad.recompute());
}
TEST_CASE("pattern replicates a body linearly and circularly", "[CadDocument]")
{
using namespace Slic3r;
// Linear: a 10x10x10 box (V=1000) repeated 3x at 20mm spacing along plane X.
// 20 > 10 so the copies are disjoint -> total V = 3*1000 = 3000.
{
CadDocument doc;
int sk = doc.add_sketch(SketchShape::Rectangle, SketchPlane::XY(),
10, 10, 5, "Box");
doc.add_extrude(sk, 10.0, false, BooleanMode::New, "E");
doc.add_pattern(/*circular=*/false, /*count=*/3, /*spacing=*/20,
/*dir=*/0, /*angle=*/0, /*target=*/-1, "LinearPattern");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
const double v = double(doc.display_mesh.volume());
REQUIRE_THAT(v, Catch::Matchers::WithinRel(3000.0, 0.02));
}
// Circular: a 10x10x10 box centred at x=50 (radius 50 from the Z axis), 4 copies
// over 360deg about the plane normal through the origin -> a ring of 4 disjoint
// boxes -> V = 4*1000 = 4000.
{
CadDocument doc;
SketchProfile sp;
sp.points.push_back(Vec2d(45, -5));
sp.points.push_back(Vec2d(55, -5));
sp.points.push_back(Vec2d(55, 5));
sp.points.push_back(Vec2d(45, 5));
sp.closed = true;
int sk = doc.add_sketch_profile(sp, SketchPlane::XY(), "OffsetBox");
doc.add_extrude(sk, 10.0, false, BooleanMode::New, "E");
doc.add_pattern(/*circular=*/true, /*count=*/4, /*spacing=*/0,
/*dir=*/0, /*angle=*/360, /*target=*/-1, "CircularPattern");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
const double v = double(doc.display_mesh.volume());
REQUIRE_THAT(v, Catch::Matchers::WithinRel(4000.0, 0.02));
}
// A pattern with no body must error cleanly, not crash.
{
CadDocument bad;
bad.add_pattern(false, 3, 20, 0, 0, -1, "NoBody");
REQUIRE_FALSE(bad.recompute());
}
}
TEST_CASE("thread standards table carries correct ISO/UTS measures", "[CadDocument]")
{
using namespace Slic3r;
// Table is non-empty and every entry is self-consistent.
const auto& table = thread_standards();
REQUIRE(table.size() > 40);
for (const ThreadSpec& s : table) {
REQUIRE(s.major_diameter_mm > 0.0);
REQUIRE(s.pitch_mm > 0.0);
REQUIRE(s.minor_diameter_mm() < s.major_diameter_mm);
REQUIRE(s.minor_diameter_mm() > 0.0);
// 60deg V cut depth = 0.6134 * pitch.
REQUIRE(s.thread_depth_mm() == Approx(0.6134 * s.pitch_mm));
}
// ISO metric coarse: known nominal/pitch pairs.
const ThreadSpec* m6 = find_thread_standard("M6");
REQUIRE(m6 != nullptr);
REQUIRE(m6->major_diameter_mm == Approx(6.0));
REQUIRE(m6->pitch_mm == Approx(1.0));
REQUIRE(m6->series == ThreadSpec::Series::MetricCoarse);
REQUIRE_FALSE(m6->imperial());
REQUIRE(m6->thread_depth_mm() == Approx(0.6134));
// Tapped minor (tap-drill) diameter D - 1.0825*P = 6 - 1.0825 = 4.9175.
REQUIRE(m6->minor_diameter_mm() == Approx(4.9175));
const ThreadSpec* m3 = find_thread_standard("M3");
REQUIRE(m3 != nullptr);
REQUIRE(m3->pitch_mm == Approx(0.5));
// Imperial UNC: 1/4-20 -> 0.25in major, pitch = 25.4/20 = 1.27 mm.
const ThreadSpec* q = find_thread_standard("1/4-20 UNC");
REQUIRE(q != nullptr);
REQUIRE(q->major_diameter_mm == Approx(6.35));
REQUIRE(q->pitch_mm == Approx(1.27));
REQUIRE(q->series == ThreadSpec::Series::UNC);
REQUIRE(q->imperial());
// Imperial UNF fine variant has a finer pitch than its UNC sibling.
const ThreadSpec* qf = find_thread_standard("1/4-28 UNF");
REQUIRE(qf != nullptr);
REQUIRE(qf->major_diameter_mm == Approx(6.35));
REQUIRE(qf->pitch_mm == Approx(25.4 / 28.0));
REQUIRE(qf->pitch_mm < q->pitch_mm);
// Unknown designation -> nullptr.
REQUIRE(find_thread_standard("M7.3 bogus") == nullptr);
}
TEST_CASE("datum plane: offset + tilt resolution and sketching on it", "[CadDocument]")
{
using Catch::Matchers::WithinRel;
using Catch::Matchers::WithinAbs;
// Parallel offset plane 30 mm above XY (normal +Z, origin at z=30).
CadDocument doc;
int p0 = doc.add_plane(0 /*XY*/, 30.0, 0.0, 0, "Plane1");
REQUIRE(p0 == 0);
auto planes = doc.resolve_datum_planes();
REQUIRE(planes.size() == 1);
REQUIRE(planes[0].first == "Plane1");
CHECK_THAT(planes[0].second.origin.z(), WithinAbs(30.0, 1e-9));
CHECK_THAT(planes[0].second.normal.z(), WithinAbs(1.0, 1e-9));
// A second datum plane tilted 90 deg about the base (XY) X axis: its normal
// rotates from +Z toward -Y (Rodrigues about +X: +Z -> -Y).
doc.add_plane(0 /*XY*/, 0.0, 90.0, 0 /*about X*/, "Plane2");
planes = doc.resolve_datum_planes();
REQUIRE(planes.size() == 2);
CHECK_THAT(planes[1].second.normal.y(), WithinAbs(-1.0, 1e-9));
CHECK_THAT(planes[1].second.normal.z(), WithinAbs(0.0, 1e-9));
// Sketch a 10x10 square ON Plane1 and extrude 4 mm: the solid must sit in z=[30,34].
SketchPlane sp = planes[0].second;
SketchProfile prof;
prof.points = {{-5,-5},{5,-5},{5,5},{-5,5}};
prof.closed = true;
int sk = doc.add_sketch_profile(prof, sp, "S");
doc.add_extrude(sk, 4.0, false, BooleanMode::New, "E");
REQUIRE(doc.recompute());
Bnd_Box bb;
BRepBndLib::Add(doc.body, bb);
double xmin,ymin,zmin,xmax,ymax,zmax;
bb.Get(xmin,ymin,zmin,xmax,ymax,zmax);
CHECK_THAT(zmin, WithinAbs(30.0, 1e-6));
CHECK_THAT(zmax, WithinAbs(34.0, 1e-6));
CHECK_THAT(double(doc.display_mesh.volume()), WithinRel(400.0, 0.02));
// A datum-plane-only document has no solid -> recompute is a benign failure.
CadDocument only_plane;
only_plane.add_plane(0, 10.0, 0.0, 0, "P");
REQUIRE_FALSE(only_plane.recompute());
}
TEST_CASE("loft builds a solid skinning two profiles on parallel planes", "[CadDocument]")
{
using Catch::Matchers::WithinRel;
using Catch::Matchers::WithinAbs;
CadDocument doc;
// Bottom 20x20 square on XY.
SketchProfile bot;
bot.points = {{-10,-10},{10,-10},{10,10},{-10,10}};
bot.closed = true;
int s0 = doc.add_sketch_profile(bot, SketchPlane::XY(), "Bottom");
// Top 10x10 square on a datum plane 20 mm above XY (exercises datum -> loft).
doc.add_plane(0 /*XY*/, 20.0, 0.0, 0, "Plane1");
SketchPlane top = doc.resolve_datum_planes()[0].second;
SketchProfile tp;
tp.points = {{-5,-5},{5,-5},{5,5},{-5,5}};
tp.closed = true;
int s1 = doc.add_sketch_profile(tp, top, "Top");
// Ruled (straight) sections -> exact planar end caps at z=0 and z=20.
doc.add_loft({s0, s1}, true /*ruled*/, BooleanMode::New, "Loft1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
// The loft spans z=[0,20]. ThruSections approximates each section as a BSpline
// curve, so the lateral surface bulges ~0.05 mm past the end planes (sub-visual,
// ~0.25%) — assert the span loosely; the volume below is the real correctness gate.
Bnd_Box bb;
BRepBndLib::Add(doc.body, bb);
double xmin,ymin,zmin,xmax,ymax,zmax;
bb.Get(xmin,ymin,zmin,xmax,ymax,zmax);
CHECK_THAT(zmin, WithinAbs(0.0, 0.1));
CHECK_THAT(zmax, WithinAbs(20.0, 0.1));
// Square frustum volume = h/3*(A1+A2+sqrt(A1*A2)) = 20/3*(400+100+200) = 4666.67.
CHECK_THAT(double(doc.display_mesh.volume()), WithinRel(4666.67, 0.03));
// A single profile is not enough -> benign recompute failure.
CadDocument one;
SketchProfile sp; sp.points = {{-5,-5},{5,-5},{5,5},{-5,5}}; sp.closed = true;
int only = one.add_sketch_profile(sp, SketchPlane::XY(), "Only");
one.add_loft({only}, false, BooleanMode::New, "L");
REQUIRE_FALSE(one.recompute());
}
TEST_CASE("draft tapers a solid face about the body base", "[CadDocument]")
{
using namespace Slic3r;
// 10x10x10 box from z=0..10 (V=1000). Drafting a vertical side face by +10deg about
// the bottom (neutral) plane tilts its top edge inward, removing material so V<1000.
// A box's 2 horizontal faces are parallel to the neutral plane and cannot be drafted
// (Add fails -> recompute returns false), so exactly the 4 vertical sides succeed.
int ok_faces = 0;
bool saw_taper = false;
for (int fid = 0; fid < 6; ++fid) {
CadDocument doc;
int sk = doc.add_sketch(SketchShape::Rectangle, SketchPlane::XY(), 10, 10, 5, "Box");
doc.add_extrude(sk, 10.0, false, BooleanMode::New, "E");
doc.add_draft(10.0, fid, -1, "Draft1");
if (!doc.recompute()) continue; // top/bottom faces: parallel to base -> benign skip
++ok_faces;
const double v = double(doc.display_mesh.volume());
REQUIRE(v > 0.0);
if (v < 999.0) saw_taper = true;
}
REQUIRE(ok_faces == 4);
REQUIRE(saw_taper);
// Draft with no body must fail cleanly, not crash.
CadDocument bad;
bad.add_draft(5.0, 0, -1, "NoBody");
REQUIRE_FALSE(bad.recompute());
}
TEST_CASE("cut splits a body with a plane", "[cut]")
{
using Catch::Matchers::WithinRel;
auto make_box = [](CadDocument& doc, double w, double h, double d) {
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.plane = SketchPlane::XY();
sk.imported_regions = {{
{Vec2d(-w / 2, -h / 2), Vec2d(w / 2, -h / 2),
Vec2d(w / 2, h / 2), Vec2d(-w / 2, h / 2)},
}};
doc.features.push_back(sk);
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.sketch_ref = 0;
ex.distance = d;
doc.features.push_back(ex);
};
SECTION("keep upper half only") {
CadDocument doc;
make_box(doc, 20.0, 20.0, 20.0);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
const double v_orig = double(doc.display_mesh.volume());
const int n_before = int(doc.bodies.size());
REQUIRE(v_orig > 0.0);
CadFeature cut;
cut.type = CadFeatureType::Cut;
cut.plane = SketchPlane::XY();
cut.cut_offset = 10.0; // mid-height of the 0..20 box
cut.cut_keep_upper = true;
cut.cut_keep_lower = false;
doc.features.push_back(cut);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(int(doc.bodies.size()) == n_before);
REQUIRE_THAT(double(doc.display_mesh.volume()), WithinRel(v_orig * 0.5, 0.01));
}
SECTION("keep both halves splits into two bodies") {
CadDocument doc;
make_box(doc, 20.0, 20.0, 20.0);
REQUIRE(doc.recompute());
const double v_orig = double(doc.display_mesh.volume());
const int n_before = int(doc.bodies.size());
REQUIRE(v_orig > 0.0);
CadFeature cut;
cut.type = CadFeatureType::Cut;
cut.plane = SketchPlane::XY();
cut.cut_offset = 10.0;
cut.cut_keep_upper = true;
cut.cut_keep_lower = true;
doc.features.push_back(cut);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(int(doc.bodies.size()) == n_before + 1);
REQUIRE_THAT(double(doc.display_mesh.volume()), WithinRel(v_orig, 0.01));
for (const auto& b : doc.bodies) {
double v = double(SketchEngine::tessellate(b.shape).volume());
REQUIRE_THAT(v, WithinRel(v_orig * 0.5, 0.01));
}
}
SECTION("keep lower half only") {
CadDocument doc;
make_box(doc, 20.0, 20.0, 20.0);
REQUIRE(doc.recompute());
const double v_orig = double(doc.display_mesh.volume());
const int n_before = int(doc.bodies.size());
CadFeature cut;
cut.type = CadFeatureType::Cut;
cut.plane = SketchPlane::XY();
cut.cut_offset = 10.0;
cut.cut_keep_upper = false;
cut.cut_keep_lower = true;
doc.features.push_back(cut);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(int(doc.bodies.size()) == n_before);
REQUIRE_THAT(double(doc.display_mesh.volume()), WithinRel(v_orig * 0.5, 0.01));
}
SECTION("flip swaps which side is kept") {
CadDocument doc;
make_box(doc, 20.0, 20.0, 20.0);
REQUIRE(doc.recompute());
const double v_orig = double(doc.display_mesh.volume());
// cut with flip=true, keep_upper=true → the -normal side (original bottom half)
CadFeature cut;
cut.type = CadFeatureType::Cut;
cut.plane = SketchPlane::XY();
cut.cut_offset = 10.0;
cut.cut_flip = true;
cut.cut_keep_upper = true;
cut.cut_keep_lower = false;
doc.features.push_back(cut);
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE_THAT(double(doc.display_mesh.volume()), WithinRel(v_orig * 0.5, 0.01));
}
SECTION("both keep flags false throws") {
CadDocument doc;
make_box(doc, 20.0, 20.0, 20.0);
REQUIRE(doc.recompute());
CadFeature cut;
cut.type = CadFeatureType::Cut;
cut.plane = SketchPlane::XY();
cut.cut_keep_upper = false;
cut.cut_keep_lower = false;
doc.features.push_back(cut);
REQUIRE_FALSE(doc.recompute());
}
}
TEST_CASE("serialize_recipe roundtrip with two bodies", "[CadDocument]")
{
using Catch::Matchers::WithinRel;
CadDocument doc;
// Body 1: rectangle sketch + extrude + fillet
int sk1 = doc.add_sketch(SketchShape::Rectangle, SketchPlane::XY(),
20, 20, 10, "Rect1");
REQUIRE(sk1 >= 0);
doc.add_extrude(sk1, 10.0, false, BooleanMode::New, "Extrude1");
doc.add_fillet(2.0, FaceGroup::All, "Fillet1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
// Body 2: circle sketch + extrude (separate New body)
SketchEntity circ;
circ.type = SketchEntity::Type::Circle;
circ.center = Vec2d(0, 0);
circ.radius = 8.0;
int sk2 = doc.add_sketch_entities({circ}, SketchPlane::XZ(), "Circle2");
doc.add_extrude(sk2, 6.0, false, BooleanMode::New, "Extrude2");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.bodies.size() >= 2);
std::vector<double> orig_vols;
for (const auto& b : doc.bodies)
orig_vols.push_back(double(SketchEngine::tessellate(b.shape).volume()));
auto blob = doc.serialize_recipe();
REQUIRE_FALSE(blob.empty());
CadDocument doc2;
REQUIRE(doc2.deserialize_recipe(blob));
REQUIRE(doc2.error.empty());
REQUIRE(doc2.bodies.size() == doc.bodies.size());
for (size_t i = 0; i < doc.bodies.size(); ++i) {
double v2 = double(SketchEngine::tessellate(doc2.bodies[i].shape).volume());
REQUIRE_THAT(v2, WithinRel(orig_vols[i], 1e-6));
}
}
TEST_CASE("deserialize_recipe rejects future version with error", "[CadDocument]")
{
CadDocument doc;
std::ostringstream oss;
{
cereal::BinaryOutputArchive ar(oss);
uint32_t v = 999;
ar(v);
}
REQUIRE_FALSE(doc.deserialize_recipe(oss.str()));
REQUIRE_FALSE(doc.error.empty());
CHECK_THAT(doc.error, Catch::Matchers::ContainsSubstring("newer version"));
}
TEST_CASE("deserialize_recipe rejects older version with error", "[CadDocument]")
{
CadDocument doc;
std::ostringstream oss;
{
cereal::BinaryOutputArchive ar(oss);
uint32_t v = 1;
ar(v);
}
REQUIRE_FALSE(doc.deserialize_recipe(oss.str()));
REQUIRE_FALSE(doc.error.empty());
CHECK_THAT(doc.error, Catch::Matchers::ContainsSubstring("older version"));
}
TEST_CASE("deserialize_recipe handles truncated blob without throwing", "[CadDocument]")
{
CadDocument doc;
std::string garbage = "this is not a valid cereal blob";
REQUIRE_FALSE(doc.deserialize_recipe(garbage));
REQUIRE_FALSE(doc.error.empty());
}
TEST_CASE("deserialize_recipe handles empty blob without throwing", "[CadDocument]")
{
CadDocument doc;
REQUIRE_FALSE(doc.deserialize_recipe(""));
REQUIRE_FALSE(doc.error.empty());
}
TEST_CASE("deserialize_recipe error is non-empty on every failure path", "[CadDocument]")
{
CadDocument doc;
auto reset = [&]() { doc = CadDocument{}; };
// too new
{
std::ostringstream oss;
{ cereal::BinaryOutputArchive ar(oss); uint32_t v = 999; ar(v); }
reset();
REQUIRE_FALSE(doc.deserialize_recipe(oss.str()));
REQUIRE_FALSE(doc.error.empty());
}
// too old
{
std::ostringstream oss;
{ cereal::BinaryOutputArchive ar(oss); uint32_t v = 1; ar(v); }
reset();
REQUIRE_FALSE(doc.deserialize_recipe(oss.str()));
REQUIRE_FALSE(doc.error.empty());
}
// truncated / garbage
{
reset();
REQUIRE_FALSE(doc.deserialize_recipe("not a valid blob \x00\x01\x02"));
REQUIRE_FALSE(doc.error.empty());
}
// empty
{
reset();
REQUIRE_FALSE(doc.deserialize_recipe(""));
REQUIRE_FALSE(doc.error.empty());
}
}
TEST_CASE("re-edit: editing a mid-timeline feature rebuilds downstream", "[CadDocument]")
{
using Catch::Matchers::WithinRel;
CadDocument doc;
int sk = doc.add_sketch(SketchShape::Rectangle, SketchPlane::XY(),
20, 10, 0, "Sketch1");
REQUIRE(sk >= 0);
int ex = doc.add_extrude(sk, 5.0, false, BooleanMode::New, "Extrude1");
REQUIRE(ex >= 0);
doc.add_fillet(1.0, FaceGroup::All, "Fillet1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
Vec3d sz0 = doc.display_mesh.bounding_box().size();
REQUIRE(sz0.z() > 0.0);
// Edit the MID feature (extrude — NOT the last; Fillet is downstream).
doc.features[ex].distance = 12.0;
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
Vec3d sz1 = doc.display_mesh.bounding_box().size();
REQUIRE(sz1.z() > sz0.z() + 1.0);
REQUIRE(doc.bodies.size() == 1);
// Edit the FIRST feature (sketch width) — must propagate the whole chain.
doc.features[sk].width = 30;
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
Vec3d sz2 = doc.display_mesh.bounding_box().size();
REQUIRE(sz2.x() > sz1.x() + 1.0);
}
TEST_CASE("re-edit survives serialize -> deserialize", "[CadDocument]")
{
using Catch::Matchers::WithinRel;
CadDocument doc;
int sk = doc.add_sketch(SketchShape::Rectangle, SketchPlane::XY(),
20, 10, 0, "Sketch1");
REQUIRE(sk >= 0);
doc.add_extrude(sk, 5.0, false, BooleanMode::New, "Extrude1");
doc.add_fillet(1.0, FaceGroup::All, "Fillet1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
auto blob = doc.serialize_recipe();
REQUIRE_FALSE(blob.empty());
CadDocument doc2;
REQUIRE(doc2.deserialize_recipe(blob));
REQUIRE(doc2.error.empty());
REQUIRE(doc2.recompute());
REQUIRE(doc2.error.empty());
Vec3d sz_pre = doc2.display_mesh.bounding_box().size();
REQUIRE(sz_pre.z() > 0.0);
// Mid-edit the deserialized document — the persisted recipe stays re-editable.
doc2.features[1].distance = 12.0;
REQUIRE(doc2.recompute());
REQUIRE(doc2.error.empty());
Vec3d sz_post = doc2.display_mesh.bounding_box().size();
REQUIRE(sz_post.z() > sz_pre.z() + 1.0);
}
TEST_CASE("re-edit: multi-type timeline replays all downstream features", "[CadDocument]")
{
using Catch::Matchers::WithinRel;
CadDocument doc;
int sk = doc.add_sketch(SketchShape::Rectangle, SketchPlane::XY(),
30, 30, 0, "Sketch1");
REQUIRE(sk >= 0);
int ex = doc.add_extrude(sk, 10.0, false, BooleanMode::New, "Extrude1");
REQUIRE(ex >= 0);
doc.add_hole(6.0, 4.0, false, 0.0, 0.0, SketchPlane::XY(), "Hole1");
doc.add_chamfer(1.0, FaceGroup::All, "Chamfer1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
size_t n_bodies = doc.bodies.size();
REQUIRE(n_bodies >= 1);
Vec3d sz0 = doc.display_mesh.bounding_box().size();
REQUIRE(sz0.z() > 0.0);
// Edit the MID extrude — downstream Hole and Chamfer must rebuild.
doc.features[ex].distance = 16.0;
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.bodies.size() == n_bodies);
Vec3d sz1 = doc.display_mesh.bounding_box().size();
REQUIRE(sz1.z() > sz0.z() + 1.0);
}
TEST_CASE("datum plane construction methods", "[CadDocument][plane]")
{
using Catch::Matchers::WithinAbs;
// Build a doc with a box (sketch rect 40x30 + extrude 20) so bodies[0] has faces/edges.
CadDocument doc;
int sk = doc.add_sketch(SketchShape::Rectangle, SketchPlane::XY(), 40, 30, 0, "BoxSketch");
REQUIRE(sk >= 0);
doc.add_extrude(sk, 20.0, false, BooleanMode::New, "Extrude1");
REQUIRE(doc.recompute());
REQUIRE(doc.error.empty());
REQUIRE(doc.bodies.size() == 1);
const int n_faces = GeometryEngine::face_count(doc.bodies[0].shape);
REQUIRE(n_faces == 6); // a box
const int n_edges = GeometryEngine::edge_count(doc.bodies[0].shape);
REQUIRE(n_edges == 12);
// Find top face (normal ~ +Z) and bottom face (normal ~ -Z) by scanning.
int top_idx = -1, bot_idx = -1;
for (int i = 0; i < n_faces; ++i) {
TopoDS_Face fc = GeometryEngine::face_by_index(doc.bodies[0].shape, i);
Vec3d n = GeometryEngine::face_normal_world(fc);
if (n.z() > 0.9) top_idx = i;
if (n.z() < -0.9) bot_idx = i;
}
REQUIRE(top_idx >= 0);
REQUIRE(bot_idx >= 0);
// --- Offset from base XY by 10 ---
auto planes0 = doc.resolve_datum_planes();
size_t initial = planes0.size();
CadFeature f0;
f0.type = CadFeatureType::Plane;
f0.name = "Offset10";
f0.plane_base = 0; // XY
f0.plane_type = PlaneType::Offset;
f0.plane_offset = 10;
doc.features.push_back(f0);
auto planes = doc.resolve_datum_planes();
REQUIRE(planes.size() == initial + 1);
CHECK_THAT(planes.back().second.origin.z(), WithinAbs(10.0, 1e-6));
CHECK_THAT(planes.back().second.normal.z(), WithinAbs(1.0, 1e-6));
// --- Coincident to top face ---
CadFeature f1;
f1.type = CadFeatureType::Plane;
f1.name = "CoincidentTop";
f1.plane_type = PlaneType::Coincident;
f1.plane_face_body = 0;
f1.plane_face = top_idx;
doc.features.push_back(f1);
planes = doc.resolve_datum_planes();
REQUIRE(planes.size() == initial + 2);
CHECK_THAT(planes.back().second.origin.z(), WithinAbs(20.0, 1e-6)); // box height is 20
CHECK_THAT(planes.back().second.normal.z(), WithinAbs(1.0, 1e-6));
// --- Midplane between top and bottom faces ---
CadFeature f2;
f2.type = CadFeatureType::Plane;
f2.name = "Midplane";
f2.plane_type = PlaneType::Midplane;
f2.plane_face_body = 0;
f2.plane_face = top_idx;
f2.plane_face2_body = 0;
f2.plane_face2 = bot_idx;
doc.features.push_back(f2);
planes = doc.resolve_datum_planes();
REQUIRE(planes.size() == initial + 3);
CHECK_THAT(planes.back().second.origin.z(), WithinAbs(10.0, 1e-6)); // midway
CHECK_THAT(std::abs(planes.back().second.normal.z()), WithinAbs(1.0, 1e-6));
// --- Orthonormality check on all resolved planes ---
for (const auto& [name, sp] : planes) {
INFO("Plane: " << name);
CHECK_THAT(sp.normal.norm(), WithinAbs(1.0, 1e-6));
CHECK_THAT(sp.x_axis.norm(), WithinAbs(1.0, 1e-6));
CHECK_THAT(sp.y_axis.norm(), WithinAbs(1.0, 1e-6));
CHECK_THAT(std::abs(sp.x_axis.dot(sp.y_axis)), WithinAbs(0.0, 1e-6));
CHECK_THAT(std::abs(sp.x_axis.dot(sp.normal)), WithinAbs(0.0, 1e-6));
CHECK_THAT(std::abs(sp.y_axis.dot(sp.normal)), WithinAbs(0.0, 1e-6));
}
}
// Mirrors the snaporca [Deviation] case (snaporca carries it in test_geometry.cpp; here it lives
// alongside the CAD suite). GeometryEngine::surface_deviation = one-sided Hausdorff used by the
// MCP validate_against acceptance metric.
TEST_CASE("surface_deviation: identical solids ~0, shifted solid ~shift", "[Deviation]")
{
TopoDS_Shape ref = BRepPrimAPI_MakeBox(10.0, 10.0, 10.0).Shape();
auto d0 = GeometryEngine::surface_deviation(ref, ref, 0.5);
REQUIRE(d0.sample_count > 0);
REQUIRE_THAT(d0.max_mm, Catch::Matchers::WithinAbs(0.0, 1e-6));
// candidate shifted +2mm in X: far corner vertices sit 2mm outside the reference
gp_Trsf t; t.SetTranslation(gp_Vec(2.0, 0.0, 0.0));
TopoDS_Shape shifted = BRepBuilderAPI_Transform(ref, t, true).Shape();
auto d1 = GeometryEngine::surface_deviation(shifted, ref, 0.5);
REQUIRE_THAT(d1.max_mm, Catch::Matchers::WithinAbs(2.0, 0.05));
REQUIRE(d1.mean_mm > 0.0);
}
TEST_CASE("mesh_to_brep: watertight cube -> solid, coplanar merge gives 6 faces", "[design][mesh2brep]")
{
const indexed_triangle_set cube = its_make_cube(10.0, 20.0, 30.0);
REQUIRE(cube.indices.size() == 12);
SECTION("faceted: one B-rep face per triangle, exact volume") {
GeometryEngine::MeshBrepStats st;
const TopoDS_Shape shape = GeometryEngine::mesh_to_brep(cube, 0.01, /*no merge*/0.0, st);
REQUIRE_FALSE(shape.IsNull());
CHECK(st.kept_tris == 12);
CHECK(st.faces_built == 12);
CHECK(st.faces_final == 12);
// Shared topology by construction: a cube has 8 vertices and 18 edges once the two
// triangles of each face share their diagonal. Every edge used exactly twice.
CHECK(st.unique_edges == 18);
CHECK(st.boundary_edges == 0);
CHECK(st.nonmanifold_edges == 0);
CHECK(st.watertight);
REQUIRE(st.is_solid);
REQUIRE_THAT(st.volume, Catch::Matchers::WithinRel(10.0 * 20.0 * 30.0, 1e-9));
}
SECTION("merge coplanar: 12 triangles collapse to the cube's 6 real faces") {
GeometryEngine::MeshBrepStats st;
const TopoDS_Shape shape = GeometryEngine::mesh_to_brep(cube, 0.01, 5.0, st);
REQUIRE_FALSE(shape.IsNull());
REQUIRE(st.is_solid);
// This is the whole point of merging: the imported body must expose pickable CAD faces,
// not one face per triangle, or the fillet/extrude tools have nothing meaningful to grab.
REQUIRE(st.faces_final == 6);
REQUIRE_THAT(st.volume, Catch::Matchers::WithinRel(10.0 * 20.0 * 30.0, 1e-9));
}
}
TEST_CASE("mesh_to_brep: an open mesh is reported as a shell, never a fake solid", "[design][mesh2brep]")
{
indexed_triangle_set open_cube = its_make_cube(10.0, 10.0, 10.0);
open_cube.indices.pop_back(); // punch a hole: drop one triangle
open_cube.indices.pop_back(); // (and its coplanar partner -> a whole face missing)
GeometryEngine::MeshBrepStats st;
const TopoDS_Shape shape = GeometryEngine::mesh_to_brep(open_cube, 0.01, 5.0, st);
REQUIRE_FALSE(shape.IsNull());
CHECK(st.kept_tris == 10);
CHECK(st.boundary_edges > 0); // the hole's rim
CHECK_FALSE(st.watertight);
REQUIRE_FALSE(st.is_solid); // must NOT be dressed up as a solid
CHECK(st.volume == 0.0);
}
TEST_CASE("mesh_to_brep: degenerate triangles are rejected on a scale-independent test", "[design][mesh2brep]")
{
// A thin but perfectly legitimate CAD sliver. Every edge (1.0, ~0.5, ~0.5) is far above the
// 0.01 dedup tolerance, so no vertex collapses — but its area (5e-5) is BELOW tolerance^2
// (1e-4). A rule of "reject when area < tolerance^2" would therefore throw it away, which is
// precisely the bug that turned a watertight 62k-triangle input into a falsely-open shell.
// The scale-independent test (area < 1e-9 * longest_edge^2 = 1e-9) keeps it, as it must.
indexed_triangle_set sliver;
sliver.vertices = { {0.f, 0.f, 0.f}, {1.f, 0.f, 0.f}, {0.5f, 0.0001f, 0.f} };
sliver.indices = { {0, 1, 2} };
GeometryEngine::MeshBrepStats st;
GeometryEngine::mesh_to_brep(sliver, 0.01, 0.0, st);
CHECK(st.degenerate_sliver == 0);
CHECK(st.degenerate_collapsed == 0);
CHECK(st.kept_tris == 1);
// A truly collinear triangle has no area at any scale -> rejected as a sliver.
indexed_triangle_set collinear;
collinear.vertices = { {0.f, 0.f, 0.f}, {10.f, 0.f, 0.f}, {20.f, 0.f, 0.f} };
collinear.indices = { {0, 1, 2} };
GeometryEngine::MeshBrepStats st2;
CHECK_THROWS(GeometryEngine::mesh_to_brep(collinear, 0.01, 0.0, st2)); // nothing left to build
CHECK(st2.degenerate_sliver == 1);
// A triangle entirely inside one tolerance cell is sub-resolution noise -> collapsed.
indexed_triangle_set tiny;
tiny.vertices = { {0.f, 0.f, 0.f}, {0.001f, 0.f, 0.f}, {0.f, 0.001f, 0.f} };
tiny.indices = { {0, 1, 2} };
GeometryEngine::MeshBrepStats st3;
CHECK_THROWS(GeometryEngine::mesh_to_brep(tiny, 0.1, 0.0, st3));
CHECK(st3.degenerate_collapsed == 1);
}
// --- Golden recipe fixture (v1 format tripwire) ---
static CadDocument make_golden_doc_v1()
{
CadDocument doc;
// ---- Body 0: base box with distinctive taper ----
int sk0 = doc.add_sketch(SketchShape::Rectangle, SketchPlane::XY(),
30, 20, 15, "Sketch_Base");
doc.add_extrude(sk0, 15.0, false, BooleanMode::New, "Extrude_Base");
int ex0 = int(doc.features.size()) - 1;
doc.features[ex0].taper_deg = 8.5;
doc.features[ex0].extrude_end = ExtrudeEnd::Blind;
// Dress-up: fillet lateral faces, chamfer top face — distinct non-default sizes
doc.add_fillet(3.5, FaceGroup::Lateral, "Fillet_Lat35");
doc.add_chamfer(2.0, FaceGroup::Top, "Chamfer_Top2");
// Hole: offset position, non-through
doc.add_hole(7.5, 11.0, false, 4.0, 3.0, SketchPlane::XY(), "Hole_Off75");
// Draft: angle 7.25 deg on face 3
doc.add_draft(7.25, 3, 0, "Draft_F3");
// Shell: thickness 1.375 mm, open face 1
doc.add_shell(1.375, 1, 0, "Shell_T1375");
// Thread: internal, radius 4, pitch 2.5, height 15, depth 1.25
doc.add_thread(4.0, 2.5, 15.0, 1.25, true, 0.0, 0.0, SketchPlane::XY(), "Thread_Int");
// Cut: plane XY, offset 10, flip, keep upper only
doc.add_cut(SketchPlane::XY(), 10.0, true, true, false, 0, "Cut_Flip");
// Pattern: linear 5 copies, spacing 13.5 mm along plane X
doc.add_pattern(false, 5, 13.5, 0, 360.0, 0, "Pattern_Lin5");
// ---- Datum plane ----
doc.add_plane(0, 25.0, 0.0, 0, "Plane_Datum25");
// ---- Revolve: self-contained body (sketch + revolve) ----
{
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "Sketch_Rev";
sk.plane = SketchPlane::XY();
sk.entities = {{SketchEntity::Type::Circle, Vec2d(12,0), Vec2d(12,0), Vec2d(12,0), 4.0}};
doc.features.push_back(sk);
}
int rev_sk = int(doc.features.size()) - 1;
doc.add_revolve(rev_sk, 217.0, 1, false, BooleanMode::New, "Revolve_Y217");
// ---- Sweep: self-contained body (profile + path sketches + sweep) ----
{
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "Sketch_SwProf";
sk.plane = SketchPlane::XY();
sk.entities = {{SketchEntity::Type::Circle, Vec2d(0,0), Vec2d(0,0), Vec2d(0,0), 3.0}};
doc.features.push_back(sk);
}
int sw_prof = int(doc.features.size()) - 1;
{
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "Sketch_SwPath";
sk.plane = SketchPlane::XZ();
sk.entities = {{SketchEntity::Type::Line, Vec2d(0,0), Vec2d(0,35)}};
doc.features.push_back(sk);
}
int sw_path = int(doc.features.size()) - 1;
doc.add_sweep(sw_prof, sw_path, BooleanMode::New, "Sweep_Z35");
// ---- Loft: self-contained body (two profiles + loft) ----
{
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "Sketch_LoftBot";
sk.plane = SketchPlane::XY();
sk.profile.points = {{-7,-7},{7,-7},{7,7},{-7,7}};
sk.profile.closed = true;
doc.features.push_back(sk);
}
int loft_bot = int(doc.features.size()) - 1;
{
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "Sketch_LoftTop";
sk.plane.origin = Vec3d(0, 0, 25);
sk.plane.normal = Vec3d(0, 0, 1);
sk.plane.x_axis = Vec3d(1, 0, 0);
sk.plane.y_axis = Vec3d(0, 1, 0);
sk.profile.points = {{-9,-9},{9,-9},{9,9},{-9,9}};
sk.profile.closed = true;
doc.features.push_back(sk);
}
int loft_top = int(doc.features.size()) - 1;
doc.add_loft({loft_bot, loft_top}, true, BooleanMode::New, "Loft_Ruled");
// ---- Boolean: distinctive tolerance and face-mate params ----
doc.add_boolean(BooleanMode::Cut, 0, 1, false, 0.01, 2, 3, "Boolean_Cut");
// ---- Extrude variant: symmetric + two-sided end ----
{
CadFeature sk;
sk.type = CadFeatureType::Sketch;
sk.name = "Sketch_Ex2";
sk.plane = SketchPlane::XZ();
sk.entities = {{SketchEntity::Type::Circle, Vec2d(0,0), Vec2d(0,0), Vec2d(0,0), 6.0}};
doc.features.push_back(sk);
}
int sk_ex2 = int(doc.features.size()) - 1;
{
CadFeature ex;
ex.type = CadFeatureType::Extrude;
ex.name = "Extrude_Sym";
ex.sketch_ref = sk_ex2;
ex.distance = 25.0;
ex.symmetric = true;
ex.mode = BooleanMode::New;
ex.extrude_end = ExtrudeEnd::Symmetric;
ex.distance2 = 12.5;
doc.features.push_back(ex);
}
return doc;
}
TEST_CASE("regenerate golden recipe fixture", "[.regen]")
{
CadDocument doc = make_golden_doc_v1();
// ponytail: serialize_recipe() only needs features, recompute is unnecessary
// for a fixture that exercises the serialization format.
auto blob = doc.serialize_recipe();
REQUIRE_FALSE(blob.empty());
std::string path = std::string(TEST_DATA_DIR) + "/cad_recipe_v2.bin";
std::ofstream ofs(path, std::ios::binary);
REQUIRE(ofs.is_open());
ofs.write(blob.data(), static_cast<std::streamsize>(blob.size()));
ofs.close();
SUCCEED("Fixture written to " << path);
}
TEST_CASE("golden recipe v1 still deserialises", "[CadDocument]")
{
using Catch::Matchers::WithinRel;
using Catch::Matchers::WithinAbs;
// Read the golden blob from disk
std::string path = std::string(TEST_DATA_DIR) + "/cad_recipe_v2.bin";
std::ifstream ifs(path, std::ios::binary);
REQUIRE(ifs.is_open());
std::string blob((std::istreambuf_iterator<char>(ifs)),
std::istreambuf_iterator<char>());
ifs.close();
REQUIRE_FALSE(blob.empty());
// --- Layer 1: deserialize features WITHOUT recomputing, assert field values ---
std::vector<CadFeature> features;
{
std::istringstream iss(blob);
cereal::BinaryInputArchive ar(iss);
uint32_t v;
ar(v);
REQUIRE(v <= CadDocument::SNAPORCA_CAD_RECIPE_VERSION);
ar(features);
}
CadDocument expected = make_golden_doc_v1();
// Scoped tightly: this advice is ONLY valid for a count mismatch. It must not be in
// scope for the field-value assertions below, where "regenerate the fixture" is the
// one thing you must never do -- regenerating after a reorder bakes the corrupted
// layout in as the new golden and permanently disarms this test.
{
INFO("Feature count changed - did you add/remove features in make_golden_doc_v1()?");
INFO("If so: run libslic3r_tests \"[.regen]\" and re-run this test.");
REQUIRE(features.size() == expected.features.size());
}
// A failure BELOW this point means the on-disk serialization format changed: some field
// in CadFeature::save/load was reordered, retyped, or removed. Fields may only ever be
// APPENDED at the end of both lists. Do NOT regenerate the fixture to make this pass --
// fix the field order instead. See scripts/kernel-test.sh and the [.regen] case.
// Field-by-field assertions against expected values.
// Every field set to a distinctive non-default literal must be checked here.
// A field reorder in save()/load() that swaps fields of differing types
// will produce a wrong value at this position and FAIL the test.
for (size_t i = 0; i < features.size(); ++i) {
const auto& f = features[i];
const auto& e = expected.features[i];
INFO("Feature index " << i << " type " << int(f.type));
REQUIRE(f.type == e.type);
REQUIRE(f.name == e.name);
REQUIRE(f.enabled == e.enabled);
// Sketch params (all Sketch types)
if (f.type == CadFeatureType::Sketch) {
REQUIRE(f.shape == e.shape);
if (e.name == "Sketch_Base") {
REQUIRE(f.width == 30);
REQUIRE(f.height == 20);
REQUIRE(f.radius == 15);
}
if (e.name == "Sketch_Rev" || e.name == "Sketch_SwProf" || e.name == "Sketch_Ex2" || e.name == "Sketch_SwPath") {
REQUIRE(f.entities.size() == e.entities.size());
if (!f.entities.empty()) {
REQUIRE(f.entities[0].type == e.entities[0].type);
REQUIRE_THAT(f.entities[0].p0.x(), WithinAbs(e.entities[0].p0.x(), 1e-9));
REQUIRE_THAT(f.entities[0].p0.y(), WithinAbs(e.entities[0].p0.y(), 1e-9));
}
}
if (e.name == "Sketch_LoftBot" || e.name == "Sketch_LoftTop") {
REQUIRE(f.profile.points.size() == e.profile.points.size());
REQUIRE(f.profile.closed == e.profile.closed);
}
if (e.name == "Sketch_LoftTop") {
REQUIRE_THAT(f.plane.origin.z(), WithinAbs(25.0, 1e-9));
}
}
// Extrude params
if (f.type == CadFeatureType::Extrude) {
REQUIRE(f.mode == e.mode);
if (e.name == "Extrude_Base") {
REQUIRE(f.distance == 15.0);
REQUIRE(f.symmetric == false);
REQUIRE(f.extrude_end == ExtrudeEnd::Blind);
REQUIRE_THAT(f.taper_deg, WithinAbs(8.5, 1e-9));
}
if (e.name == "Extrude_Sym") {
REQUIRE(f.distance == 25.0);
REQUIRE(f.symmetric == true);
REQUIRE(f.extrude_end == ExtrudeEnd::Symmetric);
REQUIRE_THAT(f.distance2, WithinAbs(12.5, 1e-9));
}
}
// Fillet
if (f.type == CadFeatureType::Fillet && e.name == "Fillet_Lat35") {
REQUIRE_THAT(f.dressup_size, WithinAbs(3.5, 1e-9));
REQUIRE(f.face_group == FaceGroup::Lateral);
}
// Chamfer
if (f.type == CadFeatureType::Chamfer && e.name == "Chamfer_Top2") {
REQUIRE_THAT(f.dressup_size, WithinAbs(2.0, 1e-9));
REQUIRE(f.face_group == FaceGroup::Top);
}
// Hole
if (f.type == CadFeatureType::Hole && e.name == "Hole_Off75") {
REQUIRE_THAT(f.hole_diameter, WithinAbs(7.5, 1e-9));
REQUIRE_THAT(f.hole_depth, WithinAbs(11.0, 1e-9));
REQUIRE(f.hole_through == false);
REQUIRE_THAT(f.hole_x, WithinAbs(4.0, 1e-9));
REQUIRE_THAT(f.hole_y, WithinAbs(3.0, 1e-9));
}
// Draft
if (f.type == CadFeatureType::Draft && e.name == "Draft_F3") {
REQUIRE(f.draft_face == 3);
REQUIRE_THAT(f.draft_angle, WithinAbs(7.25, 1e-9));
}
// Shell
if (f.type == CadFeatureType::Shell && e.name == "Shell_T1375") {
REQUIRE_THAT(f.shell_thickness, WithinAbs(1.375, 1e-9));
REQUIRE(f.shell_face == 1);
}
// Thread
if (f.type == CadFeatureType::Thread && e.name == "Thread_Int") {
REQUIRE_THAT(f.thread_radius, WithinAbs(4.0, 1e-9));
REQUIRE_THAT(f.thread_pitch, WithinAbs(2.5, 1e-9));
REQUIRE_THAT(f.thread_height, WithinAbs(15.0, 1e-9));
REQUIRE_THAT(f.thread_depth, WithinAbs(1.25, 1e-9));
REQUIRE(f.thread_internal == true);
REQUIRE_THAT(f.thread_x, WithinAbs(0.0, 1e-9));
REQUIRE_THAT(f.thread_y, WithinAbs(0.0, 1e-9));
}
// Cut
if (f.type == CadFeatureType::Cut && e.name == "Cut_Flip") {
REQUIRE_THAT(f.cut_offset, WithinAbs(10.0, 1e-9));
REQUIRE(f.cut_flip == true);
REQUIRE(f.cut_keep_upper == true);
REQUIRE(f.cut_keep_lower == false);
}
// Pattern
if (f.type == CadFeatureType::Pattern && e.name == "Pattern_Lin5") {
REQUIRE(f.pattern_circular == false);
REQUIRE(f.pattern_count == 5);
REQUIRE_THAT(f.pattern_spacing, WithinAbs(13.5, 1e-9));
REQUIRE(f.pattern_dir == 0);
}
// Datum Plane
if (f.type == CadFeatureType::Plane && e.name == "Plane_Datum25") {
REQUIRE(f.plane_base == 0);
REQUIRE_THAT(f.plane_offset, WithinAbs(25.0, 1e-9));
REQUIRE_THAT(f.plane_angle_tilt, WithinAbs(0.0, 1e-9));
REQUIRE(f.plane_axis == 0);
}
// Revolve
if (f.type == CadFeatureType::Revolve && e.name == "Revolve_Y217") {
REQUIRE_THAT(f.revolve_angle, WithinAbs(217.0, 1e-9));
REQUIRE(f.revolve_axis == 1);
}
// Sweep
if (f.type == CadFeatureType::Sweep && e.name == "Sweep_Z35") {
REQUIRE(f.sweep_path_ref == e.sweep_path_ref);
REQUIRE(f.sweep_path_ref >= 0);
}
// Loft
if (f.type == CadFeatureType::Loft && e.name == "Loft_Ruled") {
REQUIRE(f.loft_ruled == true);
REQUIRE(f.loft_profile_refs.size() == 2);
}
// Boolean
if (f.type == CadFeatureType::Boolean && e.name == "Boolean_Cut") {
REQUIRE(f.mode == BooleanMode::Cut);
REQUIRE(f.bool_tool_body == 1);
REQUIRE(f.bool_keep_tool == false);
REQUIRE_THAT(f.bool_tolerance, WithinAbs(0.01, 1e-9));
REQUIRE(f.bool_target_face == 2);
REQUIRE(f.bool_tool_face == 3);
}
}
// --- Layer 2: geometry check (optional — only if the document recomputes) ---
// Build expected document and try to recompute it.
// ponytail: the field-value layer above is the real tripwire;
// this layer is a bonus sanity check on the full recompute path.
CadDocument exp_doc = make_golden_doc_v1();
bool exp_ok = exp_doc.recompute();
if (!exp_ok) {
INFO("Expected document from make_golden_doc_v1() could not recompute "
"(complex feature tree). Field-value checks above are sufficient.");
}
CadDocument doc;
bool ser_ok = doc.deserialize_recipe(blob);
if (exp_ok && ser_ok) {
REQUIRE(doc.error.empty());
REQUIRE(doc.bodies.size() == exp_doc.bodies.size());
for (size_t i = 0; i < doc.bodies.size(); ++i) {
double v = double(SketchEngine::tessellate(doc.bodies[i].shape).volume());
double ev = double(SketchEngine::tessellate(exp_doc.bodies[i].shape).volume());
REQUIRE_THAT(v, WithinRel(ev, 1e-6));
}
} else {
INFO("The golden recipe fixture was loaded and field-value checks passed.");
INFO("Recompute on the deserialized or expected document failed — this is");
INFO("expected for the extended golden fixture (many feature types coexist");
INFO("purely for serialization coverage). The field-value tripwire above is");
INFO("the primary format check.");
}
}
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