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Combining: points the cutting leaves a hair apart are one, and needles along edges go — the example gear (and others like it) came out with an edge of three faces and a face with no size, so not ready to print; a test for it

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Nexoniarz 2026-10-20 17:57:13 +02:00
commit 5d3121b335
2 changed files with 55 additions and 1 deletions
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18
tests/mesh_test.cpp
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@ -426,6 +426,24 @@ int main() {
const std::string text((std::istreambuf_iterator<char>(j)), {});
CHECK(text.find("\"translation\":[2,3,1]") != std::string::npos, "in glTF's axes (Y up): the position is [2,3,1]");
{ // A gear with a screw hole (scripts/gear.lua): cutting leaves points a hair apart and
// needles along edges; what comes out must still print (closed, nothing without size).
for (int teeth : {10, 16})
for (int sides : {24, 32}) {
std::vector<glm::vec3> o;
const float radius = teeth == 16 ? 0.03f : 0.018f;
for (int i = 0; i < teeth * 4; ++i) {
const float a = float(i) / float(teeth * 4) * 6.2831853f, r = i % 4 < 2 ? radius + 0.004f : radius;
o.push_back({std::cos(a) * r, std::sin(a) * r, 0});
}
Mesh g = extrudeOutline(o, {0, 0, 1}, 0.008f);
transform(g, glm::translate(glm::mat4(1.0f), glm::vec3(0, 0, 0.004f)));
combine(g, makeCylinder(sides, 0.0027f, 0.03f), Combine::Subtract);
const PrintCheck c = checkForPrint(g);
CHECK(c.closed() && c.tinyFaces == 0 && closed(g), "a %d-tooth gear minus a %d-sided hole prints (open %d, crowded %d, flipped %d, tiny %d)", teeth, sides,
c.openEdges, c.crowdedEdges, c.flippedEdges, c.tinyFaces);
}
}
{ // Sculpting: a cube made finer keeps its shape; brushes move only what's under them.
Mesh m = makeCube(1.0f);
const int times = finerForSculpting(m, 2000);