conversion of legacy model-based terrain to camera-centric render system

old/FadeSound.h

@@ -0,0 +1,40 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#ifndef FadeSoundH
+#define FadeSoundH
+
+#include "Sound.h"
+#include "AdvSound.h"
+
+class TFadeSound
+{
+    PSound Sound = nullptr;
+    float fFade = 0.0f;
+    float dt = 0.0f,
+          fTime = 0.0f;
+    TSoundState State = ss_Off;
+
+public:
+    TFadeSound() = default;
+    ~TFadeSound();
+    void Init(std::string const &Name, float fNewFade);
+    void TurnOn();
+    void TurnOff();
+    bool Playing()
+    {
+        return (State == ss_Commencing || State == ss_Starting);
+    };
+    void Free();
+    void Update();
+    void Volume(long vol);
+};
+
+//---------------------------------------------------------------------------
+#endif