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Stop estimating a prime tower for a single used filament

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The no-tower case was gated on there being no purge volume, but the SEMM flush matrix reads every configured slot and is nonzero even when only one filament is used, so the plater preview drew a tower the print would never contain.
This commit is contained in:
SoftFever
2026-09-19 00:38:22 +08:00
parent e573fc4680
commit 60ebbf7daa
2 changed files with 14 additions and 9 deletions
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tests/libslic3r/test_wipe_tower_estimate.cpp
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@@ -335,6 +335,10 @@ TEST_CASE("The shipped defaults size the tower from the flush matrix", "[WipeTow
const double flush_volume = WipeTower2::estimate_semm_flush_volume(config, 2);
const double expected = std::max(double(WipeTower::get_limit_depth_by_height(5.f)), flush_volume / (0.2 * 50.));
CHECK_THAT(estimate(config, 2, 0.2, 5.).depth, WithinAbs(expected, 1e-6));
// The flush volume is nonzero for one slot, but a lone filament makes no tool change.
REQUIRE(WipeTower2::estimate_semm_flush_volume(config, 1) > 0.);
CHECK_THAT(estimate(config, 1, 0.2, 5.).depth, WithinAbs(0., 1e-9));
}
TEST_CASE("A config missing a tower key falls back to that key's default", "[WipeTowerEstimate]") {