Adjusted walk particles and animation.

Assets/script/WalkParticles.cs

-using UnityEngine;
-using System.Collections;
-
-public class WalkParticles : MonoBehaviour {
-
-    private ParticleSystem ps;
-    private ParticleSystem.EmissionModule module;
-    private HeroMobility hm;
-
-
-    // Use this for initialization
-    void Start () {
-        ps = GetComponentInChildren<ParticleSystem>();
-        module = ps.emission;
-        hm = GetComponent<HeroMobility>();
-    }
-
-    // Update is called once per frame
-    void LateUpdate () {
-        if (hm.deltaPos.sqrMagnitude > 0) {
-            if (!ps.isPlaying) {
-                ps.Simulate(0.0f, true, false);
-                module.enabled = true;
-                ps.Play();
-            }
-        } else {
-            if (ps.isPlaying) {
-                module.enabled = false;
-                ps.Stop();
-            }
-        }
-    }
-}
+using UnityEngine;
+using System.Collections;
+
+public class WalkParticles : MonoBehaviour {
+
+    private ParticleSystem ps;
+    private ParticleSystem.EmissionModule module;
+    private HeroMobility hm;
+    public float speedThreshold = 0.001f;
+
+
+    // Use this for initialization
+    void Start () {
+        ps = GetComponentInChildren<ParticleSystem>();
+        module = ps.emission;
+        hm = GetComponent<HeroMobility>();
+    }
+
+    // Update is called once per frame
+    void LateUpdate () {
+        if (hm.deltaPos.sqrMagnitude > speedThreshold) {
+            if (!ps.isPlaying) {
+                ps.Simulate(0.0f, true, false);
+                module.enabled = true;
+                ps.Play();
+            }
+        } else {
+            if (ps.isPlaying) {
+                module.enabled = false;
+                ps.Stop();
+            }
+        }
+    }
+}