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M5a: hole standards library — counterbore/countersink + ISO/ANSI table

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Extend CadFeatureType::Hole (no new enum value) with a style flag
(simple/counterbore/countersink) and the matching geometry: a coaxial
shallow cylinder cut for counterbores, a cone-frustum cut for countersinks.
A file-local hole_std_lookup() resolves screw designations (ISO 273/4762/
10642 metric M3–M10 + common ANSI unified) into clearance/cbore/csink dims;
add_hole_standard() fills the feature from it, add_hole_styled() takes them
explicitly. Six serialized fields appended to both symmetric cereal lists
(recipe version stays 2, golden fixture regenerated 28161->29525). MCP:
hole_styled, hole_standard. 4 new [CadDocument][hole] tests; suite 83/1351.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BVzKmX6Y1aEteit1HTXG4Q
This commit is contained in:
Tommaso Bianchi
2026-07-25 03:52:01 +02:00
co-authored by Claude Opus 4.8
parent e19e51b150
commit 0bbf22ceae
5 changed files with 319 additions and 2 deletions
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src/libslic3r/CadDocument.cpp
+88
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@@ -24,6 +24,7 @@
#include <gp_Pln.hxx>
#include <TopTools_ListOfShape.hxx>
#include <BRepPrimAPI_MakeCylinder.hxx>
#include <BRepPrimAPI_MakeCone.hxx>
#include <BRepCheck_Analyzer.hxx>
#include <BRepLib.hxx>
#include <BRepAdaptor_Curve.hxx>
@@ -575,6 +576,72 @@ int CadDocument::add_hole(double diameter, double depth, bool through,
return int(features.size()) - 1;
}
// Hole standards lookup table (representative ISO 273 medium / ISO 4762 / ANSI unified).
struct HoleStdEntry { const char* desig; double clearance; double cbore_d; double cbore_depth; double csink_d; };
static const HoleStdEntry kHoleStdTable[] = {
{"M3", 3.4, 6.0, 3.4, 6.3},
{"M4", 4.5, 8.0, 4.4, 8.4},
{"M5", 5.5, 10.0, 5.4, 10.4},
{"M6", 6.6, 11.0, 6.8, 12.6},
{"M8", 9.0, 15.0, 8.8, 17.3},
{"M10", 11.0, 18.0, 11.0, 20.0},
{"#6-32", 3.7, 8.8, 4.2, 8.7},
{"#8-32", 4.4, 9.9, 5.1, 10.2},
{"1/4-20", 6.9, 14.4, 7.2, 14.7},
{"5/16-18", 8.8, 17.0, 8.2, 17.3},
{"3/8-16", 10.5, 19.6, 9.5, 19.8},
};
static bool hole_std_lookup(const std::string& desig, double& clearance,
double& cbore_d, double& cbore_depth, double& csink_d)
{
for (const auto& e : kHoleStdTable) {
if (e.desig == desig) {
clearance = e.clearance;
cbore_d = e.cbore_d;
cbore_depth = e.cbore_depth;
csink_d = e.csink_d;
return true;
}
}
return false;
}
int CadDocument::add_hole_styled(double diameter, double depth, bool through,
double x, double y, const SketchPlane& plane, int style,
double cbore_diameter, double cbore_depth,
double csink_diameter, double csink_angle,
const std::string& standard, const std::string& name)
{
CadFeature f;
f.type = CadFeatureType::Hole;
f.name = name;
f.plane = plane;
f.hole_diameter = diameter;
f.hole_depth = depth;
f.hole_through = through;
f.hole_x = x;
f.hole_y = y;
f.hole_style = style;
f.hole_cbore_diameter = cbore_diameter;
f.hole_cbore_depth = cbore_depth;
f.hole_csink_diameter = csink_diameter;
f.hole_csink_angle = csink_angle;
f.hole_standard = standard;
features.push_back(f);
return int(features.size()) - 1;
}
int CadDocument::add_hole_standard(const std::string& designation, int style, bool through,
double depth, double x, double y,
const SketchPlane& plane, const std::string& name)
{
double clearance, cbore_d, cbore_depth, csink_d;
if (!hole_std_lookup(designation, clearance, cbore_d, cbore_depth, csink_d))
throw std::runtime_error("unknown hole standard \"" + designation + "\"");
return add_hole_styled(clearance, depth, through, x, y, plane, style,
cbore_d, cbore_depth, csink_d, 90, designation, name);
}
int CadDocument::add_thread(double radius, double pitch, double height, double depth,
bool internal, double x, double y, const SketchPlane& plane,
const std::string& name)
@@ -1749,6 +1816,27 @@ void CadDocument::apply_feature(TopoDS_Shape& result, bool& have_body,
BRepAlgoAPI_Cut cut(result, tool);
if (!cut.IsDone()) throw std::runtime_error("hole cut failed");
result = cut.Shape();
// Enlarge the entry for a screw head (style 1 = counterbore, 2 = countersink).
if (f.hole_style == 1 && f.hole_cbore_diameter > f.hole_diameter
&& f.hole_cbore_depth > 1e-6) {
gp_Ax2 cbax(o, n);
TopoDS_Shape cb = BRepPrimAPI_MakeCylinder(cbax, f.hole_cbore_diameter * 0.5,
f.hole_cbore_depth).Shape();
BRepAlgoAPI_Cut cbc(result, cb);
if (cbc.IsDone() && !cbc.Shape().IsNull()) result = cbc.Shape();
} else if (f.hole_style == 2 && f.hole_csink_diameter > f.hole_diameter) {
const double Rmaj = f.hole_csink_diameter * 0.5;
const double Rmin = f.hole_diameter * 0.5;
const double half = f.hole_csink_angle * 0.5 * M_PI / 180.0;
const double h = (Rmaj - Rmin) / std::tan(half);
if (h > 1e-6) {
gp_Ax2 csax(o, n);
TopoDS_Shape cs = BRepPrimAPI_MakeCone(csax, Rmaj, Rmin, h).Shape();
BRepAlgoAPI_Cut csc(result, cs);
if (csc.IsDone() && !csc.Shape().IsNull()) result = csc.Shape();
}
}
break;
}
case CadFeatureType::Thread: {