Scripting the ragdoll simulation

To be able to deactivate and activate the ragdoll simulation on the guards, we will use the following class. For simplicity, we will keep this class in the UnityStandardAssets.Characters.ThirdPerson namespace.

This class will take care of enabling or disabling all the Rigidbodies of the guard GameObject children, avoiding touching the main Rigidbody that is still needed to keep the AI on the ground:

using UnityEngine; 
using System.Collections; 
 
namespace UnityStandardAssets.Characters.ThirdPerson 
{ 
    public class RagdollCharacter : MonoBehaviour { 
 
        // At Start, deactivate all components that serve ragdoll 
        physics.  
        void Start() { 
            // Call DeactivateRagdoll method at start 
            DeactivateRagdoll(); 
        } 
         
        // A method that activates all components for ragdoll physics 
        public void ActivateRagdoll() { 
 
            // Stop the AI by putting as alive = false the character 
            gameObject.GetComponent<AdvancedAI>
            ().SetAliveStatus(false); 
 
            //  Disable Animator component  
            gameObject.GetComponent<Animator>().enabled = false; 
            //  Disable NavMeshAgent component  
            gameObject.GetComponent<NavMeshAgent>().enabled = false; 
 
            // Find every Rigidbody in character's hierarchy 
            foreach (Rigidbody bone in 
            GetComponentsInChildren<Rigidbody>()) { 
                // Set bone's rigidbody component as not kinematic 
                bone.isKinematic = false; 
 
                //Enable collision detection for rigidbody component  
                bone.detectCollisions = true; 
            } 
 
            // this rigidbody must not detect collision and be  
            kinematic 
            GetComponent<Rigidbody>().isKinematic = true; 
            GetComponent<Rigidbody>().detectCollisions = false; 
 
            // Find every Collider in character's hierarchy 
            foreach (Collider col in  
            GetComponentsInChildren<Collider()) 
            { 
                // Enable Collider 
                col.enabled = true; 
            } 
            // main collider must be disabled 
            GetComponent<CapsuleCollider>().enabled = false; 
            GetComponent<SphereCollider>().enabled = false; 
        } 
}