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Rollback of 1cda1e7a8c, fixes #3163

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Note this change re-opens issue #2472

PiperOrigin-RevId: 884378131
Change-Id: Ifefc345f1a296e5245cbb10047bb678ffea3598f
This commit is contained in:
Yuval Tassa
2026-03-16 05:16:59 -07:00
committed by Copybara-Service
parent 55f5ac0a1d
commit a47a18dd28
2 changed files with 2 additions and 49 deletions
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test/engine/engine_forward_test.cc
-37
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@@ -811,43 +811,6 @@ TEST_F(ForwardTest, MocapQuats) {
mj_deleteModel(model);
}
// model with degenerate translational inertia
TEST_F(ForwardTest, DegenerateInertia) {
static constexpr char xml[] = R"(
<mujoco>
<option integrator="implicitfast" cone="elliptic">
<flag gravity="disable"/>
</option>
<worldbody>
<body name="1" pos="0.05 0.3 0">
<joint name="1" axis="0 1 0"/>
<geom type="capsule" size="0.1 0.5"/>
</body>
<body name="2">
<joint name="2" axis="1 0 0" stiffness="1" springref="90"/>
<geom type="capsule" size="0.1 0.5"/>
</body>
</worldbody>
</mujoco>
)";
char error[1024];
mjModel* model = LoadModelFromString(xml, error, sizeof(error));
ASSERT_THAT(model, NotNull()) << error;
mjData* data = mj_makeData(model);
for (int i = 0; i < 1000; i++) {
mj_step(model, data);
EXPECT_EQ(data->warning[mjWARN_BADQACC].number, 0)
<< "divergence at timestep " << i;
if (data->warning[mjWARN_BADQACC].number != 0) {
break;
}
}
mj_deleteData(data);
mj_deleteModel(model);
}
// user defined 2nd-order activation dynamics: frequency-controlled oscillator
// note that scalar mjcb_act_dyn callbacks are expected to return act_dot, but
// since we have a vector output we write into act_dot directly