Added collision sounds

Assets/Scripts/Utils/CollisionSounds.cs

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+using UnityEngine;
+using System.Collections;
+using UnityEngine.Audio;
+
+namespace Nothke.Audio
+{
+    public class CollisionSounds : MonoBehaviour
+    {
+        const float RELATIVE_VELOCITY_TRESHOLD = 0.1f;
+
+        // impulse based, currently unused: 
+        //const float IMPULSE_VOLUME_MULT = 0.00001f;
+        //const float IMPULSE_THRESHOLD = 1;
+
+        public CollisionSoundsProfile profile;
+
+        public float volumeVelocityMult = 0.05f;
+        public float timeout = 0.05f;
+        public float pitchMult = 1;
+        float lastTime;
+
+        public bool preventDoubleSound;
+
+        public AudioMixerGroup mixerGroup;
+
+#if UNITY_EDITOR
+        private void Start()
+        {
+            if (!profile)
+                Debug.LogError("No collision sounds profile assigned", this);
+        }
+#endif
+
+        public void ResetTimeout()
+        {
+            lastTime = Time.time;
+        }
+
+        void OnCollisionEnter(Collision collision)
+        {
+            if (!enabled)
+                return;
+
+            // Prevent sound in the first second
+            float time = Time.time;
+            if (time < 1)
+                return;
+
+            if (timeout > 0)
+            {
+                if (time - lastTime < timeout)
+                    return;
+
+                lastTime = time;
+            }
+
+            if (preventDoubleSound)
+            {
+                var colSound = collision.collider.GetComponent<CollisionSounds>();
+
+                if (colSound)
+                    colSound.ResetTimeout();
+            }
+
+            //float impulse = (collision.impulse / Time.fixedDeltaTime).magnitude;
+            //Debug.Log("Impulse: " + impulse);
+
+            //if (impulse < IMPULSE_THRESHOLD) return;
+
+            var relVel = collision.relativeVelocity.magnitude;
+
+            if (relVel < RELATIVE_VELOCITY_TRESHOLD)
+                return;
+
+            Debug.Assert(profile, "No collision sounds profile assigned", this);
+
+            // TODO: Move parameters to AudioManager:
+            profile.clips.Play(collision.GetContact(0).point,
+                volume: relVel * volumeVelocityMult,
+                pitch: Random.Range(0.95f, 1.05f) * pitchMult,
+                minDistance: 10, mixerGroup: mixerGroup);
+        }
+    }
+}

Assets/Scripts/Utils/CollisionSounds.cs.meta

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Assets/Scripts/Utils/CollisionSoundsProfile.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Nothke.Audio
+{
+    [CreateAssetMenu(menuName = "CollisionSoundsProfile", fileName = "CollisionSoundsProfile")]
+    public class CollisionSoundsProfile : ScriptableObject
+    {
+        public AudioClip[] clips;
+    }
+}
+

Assets/Scripts/Utils/CollisionSoundsProfile.cs.meta

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