Added collision sounds

Assets/Audio/hits_metallic.asset

@@ -0,0 +1,16 @@
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+%TAG !u! tag:unity3d.com,2011:
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+MonoBehaviour:
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+  m_Name: hits_metallic
+  m_EditorClassIdentifier: 
+  clips:
+  - {fileID: 8300000, guid: 8f2502b0ea356614faad568cc2ce8d28, type: 3}

Assets/Audio/hits_metallic.asset.meta

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Assets/Prefabs/Products/Basic Torus.prefab

@@ -67,6 +67,7 @@ GameObject:
   - component: {fileID: 5301951847822309914}
   - component: {fileID: 7933676651548381010}
   - component: {fileID: -6581473434499358903}
+  - component: {fileID: 4959685768444209079}
   m_Layer: 0
   m_Name: Basic Torus
   m_TagString: Untagged
@@ -162,6 +163,24 @@ MonoBehaviour:
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+  volumeVelocityMult: 0.05
+  timeout: 0.05
+  pitchMult: 1
+  preventDoubleSound: 0
+  mixerGroup: {fileID: 0}
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Assets/Prefabs/sliding_crane.prefab

@@ -226,7 +226,7 @@ Transform:
   m_GameObject: {fileID: 4060506572131258815}
   serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 20.26, y: 0, z: 28.17}
+  m_LocalPosition: {x: 20.25, y: -0.07000017, z: 28.25}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children:
@@ -1062,6 +1062,10 @@ PrefabInstance:
       propertyPath: m_Name
       value: crane_magent
       objectReference: {fileID: 0}
+    - target: {fileID: 3485108705020879377, guid: 146ff579bcab1a343bdcbf24e8b5e462, type: 3}
+      propertyPath: m_Enabled
+      value: 1
+      objectReference: {fileID: 0}
     - target: {fileID: 5436501012833944904, guid: 146ff579bcab1a343bdcbf24e8b5e462, type: 3}
       propertyPath: m_LocalPosition.x
       value: 0
@@ -1150,7 +1154,7 @@ Rigidbody:
   serializedVersion: 4
   m_Mass: 50
   m_Drag: 1
-  m_AngularDrag: 0.05
+  m_AngularDrag: 10
   m_CenterOfMass: {x: 0, y: 0, z: 0}
   m_InertiaTensor: {x: 1, y: 1, z: 1}
   m_InertiaRotation: {x: 0, y: 0, z: 0, w: 1}

Assets/Scenes/test_collision_sounds.unity.meta

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Assets/Scripts/Utils/CollisionSounds.cs

@@ -0,0 +1,84 @@
+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

@@ -0,0 +1,13 @@
+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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