ignore the sound for now. event mechanism is working good with renderer.

game/sound/dummy_sound.cpp

@@ -0,0 +1,130 @@
+#include "sound.hpp"
+
+namespace sound {
+    bool initSound(void)
+    {
+        return false;
+    }
+
+    void deleteOldSounds()
+    {
+    }
+
+    SoundHandle *playSound(enum Sound type, float amplitude)
+    {
+        (void) type;
+        (void) amplitude;
+        return NULL;
+    }
+
+    SoundHandle *playFrequency(float freq, float amplitude)
+    {
+        (void) freq;
+        (void) amplitude;
+        return NULL;
+    }
+
+    bool configureEnvelope(SoundHandle *handle, float rise, float hold, float decay)
+    {
+        (void) handle;
+        (void) rise;
+        (void) hold;
+        (void) decay;
+        return false;
+    }
+
+    bool configureOvershoot(SoundHandle *handle, float relativeOvershootTime)
+    {
+        (void) handle;
+        (void) relativeOvershootTime;
+        return false;
+    }
+
+    bool configureEnvelopeWait(SoundHandle *handle, float rise, float hold, float decay, float wait)
+    {
+        (void) handle;
+        (void) rise;
+        (void) hold;
+        (void) decay;
+        (void) wait;
+        return false;
+    }
+
+    bool configureEnvelopeLooping(SoundHandle *handle, float rise, float hold, float decay, float wait)
+    {
+        (void) handle;
+        (void) rise;
+        (void) hold;
+        (void) decay;
+        (void) wait;
+        return false;
+    }
+
+    float getRiseDuration(SoundHandle *handle)
+    {
+        (void) handle;
+        return 0.0f;
+    }
+    float getHoldDuration(SoundHandle *handle)
+    {
+        (void) handle;
+        return 0.0f;
+    }
+
+    float getDecayDuration(SoundHandle *handle)
+    {
+        (void) handle;
+        return 0.0f;
+    }
+
+    float getWaitTime(SoundHandle *handle)
+    {
+        (void) handle;
+        return 0.0f;
+    }
+
+    void configureWaitTime(SoundHandle *handle, float waitTime)
+    {
+        (void) handle;
+        (void) waitTime;
+    }
+
+    void setLoopCount(SoundHandle *handle, int numRepetitions)
+    {
+        (void) handle;
+        (void) numRepetitions;
+    }
+
+    bool stopSound(SoundHandle *handle)
+    {
+        (void) handle;
+        return true;
+    }
+
+    void stopAllSounds(void)
+    {
+    }
+
+    void teardownSound(void)
+    {
+    }
+
+    bool startDumpingWav(const char *filename)
+    {
+        (void) filename;
+        return false;
+    }
+
+    void stopDumpingWav(void)
+    {
+    }
+
+    int numActiveSounds(void)
+    {
+    }
+
+    void deleteSound(SoundHandle *handle)
+    {
+        (void) handle;
+    }
+}