v1.2.1

.gitignore

@@ -101,7 +101,6 @@ crashlytics-build.properties
 AudioClips/
 *.mp3
 *.wav
-*.audio
 
 # license
 LICENSE.meta

CHANGELOG.md

@@ -1,3 +1,9 @@
+## [1.2.1]
+
+### Changes
+
+Add in VX.Audio (remove *.audio from `.gitignore`).
+
 ## [1.2.0]
 
 ### Changes

VX.Audio/AudioCore.cs

@@ -0,0 +1,69 @@
+/*
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+The Original Code is Copyright (C) 2020 Voxell Technologies.
+All rights reserved.
+*/
+
+using UnityEngine;
+using UnityEngine.VFX;
+
+namespace Voxell.Audio
+{
+  [RequireComponent(typeof(VisualEffect))]
+  [RequireComponent(typeof(AudioSource))]
+  public sealed partial class AudioCore : MonoBehaviour
+  {
+    private const float EPSILON = 0.001f;
+
+    void Start()
+    {
+      InitAgentInteraction();
+      InitAudioVisualizer();
+    }
+
+    void Update() => UpdateAgentInteraction();
+    void FixedUpdate() => UpdateAudioVisualizer();
+
+    internal static class ShaderPropertyId
+    {
+      public static readonly int sampleCount = Shader.PropertyToID("sampleCount");
+      public static readonly int transform = Shader.PropertyToID("transform");
+      public static readonly int oldTransform = Shader.PropertyToID("oldTransform");
+      public static readonly int framRate = Shader.PropertyToID("framRate");
+    }
+
+    internal static class ShaderBufferId
+    {
+      public static readonly int cb_samplePoints = Shader.PropertyToID("cb_samplePoints");
+      public static readonly int cb_position = Shader.PropertyToID("cb_position");
+      public static readonly int cb_oldPosition = Shader.PropertyToID("cb_oldPosition");
+      public static readonly int cb_normal = Shader.PropertyToID("cb_normal;");
+      public static readonly int tex_positionMap = Shader.PropertyToID("tex_positionMap");
+      public static readonly int tex_velocityMap = Shader.PropertyToID("tex_velocityMap");
+      public static readonly int tex_normalMap = Shader.PropertyToID("tex_normalMap");
+    }
+
+    internal static class VFXPropertyId
+    {
+      public static readonly int mesh_sampleMesh = Shader.PropertyToID("SampleMesh");
+      public static readonly int float_forceMultiplier = Shader.PropertyToID("ForceMultiplier");
+      public static readonly int int_triangleCount = Shader.PropertyToID("TriangleCount");
+      public static readonly int float_idleNoiseSpeed = Shader.PropertyToID("IdleNoiseSpeed");
+      public static readonly int float_noiseIntensity = Shader.PropertyToID("NoiseIntensity");
+      public static readonly int float3_noiseScale = Shader.PropertyToID("NoiseScale");
+    }
+  }
+}

VX.Audio/AudioInteraction.cs

@@ -0,0 +1,77 @@
+/*
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+The Original Code is Copyright (C) 2020 Voxell Technologies.
+All rights reserved.
+*/
+
+using UnityEngine;
+
+namespace Voxell.Audio
+{
+  public partial class AudioCore
+  {
+    [Header("Audio Visualizer  Interaction")]
+    [Tooltip("Velocity of audio visualizer when there is no interaction")]
+    public Vector2 idleVelocity = new Vector2(1.0f, -1.0f);
+
+    [Tooltip("Minimum turbulence for VFX graph when there is no interaction or extra force")]
+    public float idleNoiseIntensity = 0.1f;
+    public float maxNoiseIntensity = 0.3f;
+
+    [Tooltip("Sensitivity of the audio visualizer on mouse drag")]
+    public float rotationMultiplier = 500;
+
+    [Range(0.8f, 0.99f), Tooltip("A number that multiplies the velocity of the audio visualizer on each update")]
+    public float velocityDamping = 0.9f;
+
+    [Tooltip("Multiplier of noise intensity before sending it to the VFX graph")]
+    public float intensityCoefficient = 0.1f;
+
+    private Vector2 _rotationVelocity;
+
+    private void InitAgentInteraction() => _rotationVelocity = Vector2.zero;
+
+    private void UpdateAgentInteraction()
+    {
+      // if (Input.GetMouseButton(0)) OnMouseDrag();
+
+      if (Vector3.Dot(transform.up, Vector3.up) >= 0)
+        transform.Rotate(Camera.main.transform.up, -Vector3.Dot(_rotationVelocity, Camera.main.transform.right), Space.World);
+      else
+        transform.Rotate(Camera.main.transform.up, -Vector3.Dot(_rotationVelocity, Camera.main.transform.right), Space.World);
+
+      transform.Rotate(Camera.main.transform.right, Vector3.Dot(_rotationVelocity, Camera.main.transform.up), Space.World);
+      _rotationVelocity *= velocityDamping;
+      _rotationVelocity += idleVelocity*Time.deltaTime;
+
+      if (_rotationVelocity.magnitude <= EPSILON) _rotationVelocity = Vector2.zero;
+
+      float intensity = Mathf.Clamp(_rotationVelocity.magnitude * intensityCoefficient, idleNoiseIntensity, maxNoiseIntensity);
+      audioVFX.SetFloat(VFXPropertyId.float_noiseIntensity, intensity);
+    }
+
+    /// <summary>
+    /// Calcualte mouse drag force and apply rotational force accordingly
+    /// </summary>
+    private void OnMouseDrag()
+    {
+      float rotationX = Input.GetAxis("Mouse X")*rotationMultiplier*Mathf.Deg2Rad;
+      float rotationY = Input.GetAxis("Mouse Y")*rotationMultiplier*Mathf.Deg2Rad;
+
+      _rotationVelocity = new Vector2(rotationX, rotationY);
+    }
+  }
+}

VX.Audio/AudioProcessor.cs

@@ -0,0 +1,63 @@
+/*
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+The Original Code is Copyright (C) 2020 Voxell Technologies.
+All rights reserved.
+*/
+
+using UnityEngine;
+
+namespace Voxell.Audio
+{
+  public class AudioProcessor
+  {
+    public AudioSource source;
+    public AudioProfile profile;
+
+    public float[] samples;
+    public int freqSize;
+    public int bandAverage;
+    public int[] bandDistribution;
+
+    public AudioProcessor(ref AudioSource source, ref AudioProfile profile)
+    {
+      Debug.Assert(profile.frequencyRange > profile.bandSize, "Number of triangles should not exceed frequency range.");
+      this.source = source;
+      this.profile = profile;
+
+      samples = new float[profile.sampleSize];
+
+      float freqInterval = AudioSettings.outputSampleRate/profile.sampleSize;
+      float currFreq = 0.0f;
+      freqSize = 0;
+
+      for (int s=0; s < profile.sampleSize; s++)
+      {
+        currFreq += freqInterval;
+        if (currFreq < profile.frequencyRange) freqSize ++;
+        else break;
+      }
+
+      bandAverage = Mathf.Max(1, freqSize/profile.bandSize);
+
+      bandDistribution = new int[profile.bandSize+1];
+      bandDistribution[0] = 0;
+      for (int b=0; b < profile.bandSize; b++)
+        bandDistribution[b+1] = bandAverage + b*bandAverage;
+    }
+
+    public void SampleSpectrum() => source.GetSpectrumData(samples, profile.channel, profile.window);
+  }
+}

VX.Audio/AudioProfile.cs

@@ -0,0 +1,36 @@
+/*
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+The Original Code is Copyright (C) 2020 Voxell Technologies.
+All rights reserved.
+*/
+
+using UnityEngine;
+
+namespace Voxell.Audio
+{
+  [System.Serializable]
+  public class AudioProfile
+  {
+    public int channel;
+    public FFTWindow window;
+    public int sampleSize;
+    public float power;
+    public float scale;
+    public int smoothingIterations;
+    [Range(5000, 20000)] public int frequencyRange;
+    [HideInInspector] public int bandSize;
+  }
+}