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• ignore_activation_dynamics : OpenSim::Muscle
• ignore_passive_fiber_force : OpenSim::DeGrooteFregly2016Muscle
• ignore_tendon_compliance : OpenSim::Muscle
• IKTaskSet : OpenSim::InverseKinematicsTool
• implicit_auxiliary_derivative_bounds : OpenSim::MocoDirectCollocationSolver
• implicit_auxiliary_derivatives_weight : OpenSim::MocoCasADiSolver
• implicit_multibody_acceleration_bounds : OpenSim::MocoDirectCollocationSolver
• implicit_multibody_accelerations_weight : OpenSim::MocoCasADiSolver
• implicitenabled_normalized_tendon_force : OpenSim::DeGrooteFregly2016Muscle
• implicitresidual_normalized_tendon_force : OpenSim::DeGrooteFregly2016Muscle
• impulse_axis : OpenSim::MocoContactImpulseTrackingGoal
• include_negative_mechanical_work : OpenSim::Bhargava2004MuscleMetabolicsProbe , OpenSim::Bhargava2004SmoothedMuscleMetabolics , OpenSim::Umberger2010MuscleMetabolicsProbe
• independent_coordinate_names : OpenSim::CoordinateCouplerConstraint
• inertia : OpenSim::Body
• initial_bounds : OpenSim::MocoVariableInfo
• initial_conditions_for_integration : OpenSim::Probe
• initial_stretch : OpenSim::ClutchedPathSpring
• initial_time : OpenSim::MocoTool
• initial_variable : OpenSim::MocoPeriodicityGoalPair
• inner_radius : OpenSim::WrapTorus
• inputs : OpenSim::Reporter< InputT >
• interpolate_control_midpoints : OpenSim::MocoDirectCollocationSolver
• interpolation_method : OpenSim::PrescribedController
• is_free_to_satisfy_constraints : OpenSim::Coordinate
• isEnforced : OpenSim::Constraint
• isometric_slope : OpenSim::ForceVelocityCurve , OpenSim::ForceVelocityInverseCurve