Started working on a MIDI demonstration scene.

Assembly-CSharp.csproj

@@ -67,6 +67,7 @@
     <Compile Include="Assets\Scripts\GameManager.cs" />
     <Compile Include="Assets\Scripts\LibPd2UnitySceneScripts\EnvelopeFollower.cs" />
     <Compile Include="Assets\Scripts\LibPdInstance.cs" />
+    <Compile Include="Assets\Scripts\MidiSceneScripts\Button2Midi.cs" />
     <Compile Include="Assets\Scripts\PlayerMovement.cs" />
     <Compile Include="Assets\Scripts\SpatialisationSceneScripts\CircleMotion.cs" />
     <Compile Include="Assets\Scripts\Teleport.cs" />

Assets/Scenes/MidiScene.unity.meta

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Assets/Scripts/LibPdInstance.cs

@@ -81,28 +81,6 @@ public class IntIntEvent : UnityEvent<int, int> {}
 /// Along those lines, I modelled parts of this class after the C# bindings, so
 /// you will likely see some duplicated code.
 /// 
-/// Also, as it stands, this requires a small patch to z_libpd.c to allow us to
-/// install our own print hook (so we can pipe print messages to Unity's
-/// Console). Unfortunately, libpd requires the print hook to be set up before
-/// libpd_init() is called, and will not accept any changes after that.
-/// 
-/// This causes major problems with Unity, as we want to set the print hook when
-/// we start our game, and clear it when the game exits. However, because Unity
-/// keeps native dlls active as long as the editor is running, libpd_init()
-/// (being a one-time function) will effectively never get called again, and the
-/// print hook will remain set to the value set when we first ran our game from
-/// the editor. The result: if we try to run our game from the editor a second
-/// time, we crash the entire editor.
-/// 
-/// For this reason the repository for this code includes pre-built libpd
-/// binaries which include the print hook patch.
-/// 
-/// If you're building libpd from source yourself, you can get around this issue
-/// by adding the following line to the end of libpd_set_printhook() in
-/// z_libpd.c:
-/// 
-/// sys_printhook = libpd_printhook;
-/// 
 /// 
 /// Note: LibPdInstance is all implemented as a single file because I find
 /// single file libraries easier to integrate into my own projects. This may

Assets/Scripts/MidiSceneScripts.meta

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Assets/Scripts/MidiSceneScripts/Button2Midi.cs

@@ -0,0 +1,51 @@
+// Button2Midi.cs - Script to send a bang to a PD patch when the player enters
+//					and leaves a collision volume.
+// -----------------------------------------------------------------------------
+// Copyright (c) 2020 Niall Moody
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+// -----------------------------------------------------------------------------
+
+using UnityEngine;
+
+/// Script to send a random MIDI note to a PD patch when the player enters and
+/// leaves a collision volume.
+public class Button2Midi : MonoBehaviour {
+
+	/// The PD patch we're going to communicate with.
+	public LibPdInstance pdPatch;
+
+	///	We need to store our random note so that we can send the corresponding
+	///	note off message when the player exits the collision volume.
+	private int note;
+
+	/// We send a bang when the player steps on the button (enters the collision
+	/// volume).
+	void OnTriggerEnter(Collider other) {
+		note = 60 + Mathf.FloorToInt(Random.value * 12.0f);
+
+		pdPatch.SendMidiNoteOn(0, note, 127);
+	}
+
+	/// We send a different bang when the player steps off the button (leaves
+	/// the collision volume).
+	void OnTriggerExit(Collider other) {
+		pdPatch.SendMidiNoteOn(0, note, 0);
+	}
+}

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Assets/StreamingAssets/PdAssets/MidiPatches.meta

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Assets/StreamingAssets/PdAssets/MidiPatches/Midi2PdExample.pd

@@ -0,0 +1,23 @@
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+#X obj 10 10 notein;
+#X obj 10 34 mtof;
+#X obj 10 122 osc~;
+#X obj 59 35 moses 1;
+#X obj 10 160 *~;
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