ml-agents/com.unity.ml-agents.extensions/Runtime/Input/Adaptors/FloatInputActionAdaptor.cs

#if MLA_INPUT_SYSTEM && UNITY_2019_4_OR_NEWER
using Unity.MLAgents.Actuators;
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.LowLevel;

namespace Unity.MLAgents.Extensions.Input
{
    /// <summary>
    /// Translates data from any control that extends from <see cref="InputControl{Single}"/>.
    /// </summary>
    public class FloatInputActionAdaptor : IRLActionInputAdaptor
    {
        /// <inheritdoc cref="IRLActionInputAdaptor.GetActionSpecForInputAction"/>
        public ActionSpec GetActionSpecForInputAction(InputAction action)
        {
            return ActionSpec.MakeContinuous(1);
        }

        /// <inheritdoc cref="IRLActionInputAdaptor.QueueInputEventForAction"/>
        public void QueueInputEventForAction(InputAction action, InputControl control, ActionSpec actionSpec, in ActionBuffers actionBuffers)
        {
            var val = actionBuffers.ContinuousActions[0];
            InputSystem.QueueDeltaStateEvent(control, val);
        }

        /// <inheritdoc cref="IRLActionInputAdaptor.WriteToHeuristic"/>
        public void WriteToHeuristic(InputAction action, in ActionBuffers actionBuffers)
        {
            var actions = actionBuffers.ContinuousActions;
            var val = action.ReadValue<float>();
            actions[0] = val;
        }
    }
}
#endif // MLA_INPUT_SYSTEM && UNITY_2019_4_OR_NEWER