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Print: walls thinner than the least (0.8 mm, set it) shown in yellow, the thinnest told; measured once per shape and size, not each move; tests

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Nexoniarz 2026-10-21 07:51:07 +02:00
commit 14e35cceb1
4 changed files with 84 additions and 2 deletions
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9
tests/mesh_test.cpp
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@ -449,6 +449,15 @@ int main() {
CHECK(checkForPrint(o).closed() && checkForPrint(o).volume < 0.05f * 0.04f * 0.01f, "an O has its hole (%g m3)", checkForPrint(o).volume);
CHECK(makeText({}, "x", st, &err).faces.empty() && !err.empty(), "no font: nothing, and why");
}
// Wall thickness: a box 2 mm thin one way is 2 mm thick on its big faces, 1 m the other ways.
{
Mesh slab = makeCube(1.0f);
transform(slab, glm::scale(glm::mat4(1), glm::vec3(1.0f, 1.0f, 0.002f)));
const std::vector<float> t = wallThickness(slab);
int thin = 0, wide = 0;
for (size_t f = 0; f < t.size(); ++f) thin += std::abs(t[f] - 0.002f) < 1e-5f, wide += std::abs(t[f] - 1.0f) < 1e-4f;
CHECK(thin == 2 && wide == 4, "wall thickness: 2 faces 2 mm, 4 faces 1 m (%d, %d)", thin, wide);
}
// The tree of boxes finds the same nearest hit as trying every triangle (and the same "in the way").
{
Mesh m = makeSphere(32, 16, 1.0f);