footsteps using dynamic track wip

src/net/torvald/terrarum/audio/AudioCodex.kt

@@ -0,0 +1,34 @@
+package net.torvald.terrarum.audio
+
+import com.badlogic.gdx.Gdx
+import com.badlogic.gdx.audio.Music
+import com.badlogic.gdx.files.FileHandle
+import com.badlogic.gdx.utils.Disposable
+import net.torvald.terrarum.Terrarum
+import net.torvald.terrarum.modulebasegame.MusicContainer
+import net.torvald.terrarum.tryDispose
+
+typealias MaterialID = String
+
+/**
+ * Created by minjaesong on 2023-12-02.
+ */
+class AudioCodex: Disposable {
+
+    @Transient val footsteps = HashMap<MaterialID, HashSet<MusicContainer>>()
+
+    internal constructor()
+
+    fun addToFootstepPool(materialID: MaterialID, music: FileHandle) {
+        if (footsteps[materialID] == null) footsteps[materialID] = HashSet()
+        footsteps[materialID]!!.add(
+            MusicContainer(music.nameWithoutExtension(), music.file(), Gdx.audio.newMusic(music)) {}
+        )
+    }
+
+    fun getRandomFootstep(materialID: MaterialID) = footsteps[materialID]?.random()
+
+    override fun dispose() {
+        footsteps.values.forEach { it.forEach { it.gdxMusic.tryDispose() } }
+    }
+}