[Add] Sound effects.

[Add] Player walking sounds.

Bin/VC10/VC10.vcxproj

@@ -83,6 +83,7 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
+    <ClInclude Include="..\..\src\Actor\NPC.h" />
     <ClInclude Include="..\..\src\Actor\Player.h" />
     <ClInclude Include="..\..\src\Collision\AABB.h" />
     <ClInclude Include="..\..\src\Global\Constants.h" />
@@ -101,6 +102,7 @@
     <ClInclude Include="..\..\src\Math\Timer.h" />
     <ClInclude Include="..\..\src\Math\Vec2.h" />
     <ClInclude Include="..\..\Src\Sound\Music.h" />
+    <ClInclude Include="..\..\Src\Sound\SoundEffect.h" />
     <ClInclude Include="..\..\src\Sprite\Sprite.h" />
     <ClInclude Include="..\..\src\System\Debug.h" />
     <ClInclude Include="..\..\src\System\ResourceManager.h" />
@@ -122,6 +124,7 @@
     <ClInclude Include="..\..\src\TMXParser\TmxUtil.h" />
   </ItemGroup>
   <ItemGroup>
+    <ClCompile Include="..\..\src\Actor\NPC.cpp" />
     <ClCompile Include="..\..\src\Actor\Player.cpp" />
     <ClCompile Include="..\..\src\Collision\AABB.cpp" />
     <ClCompile Include="..\..\src\Global\Constants.cpp" />
@@ -136,6 +139,7 @@
     <ClCompile Include="..\..\src\Math\Timer.cpp" />
     <ClCompile Include="..\..\src\Math\Vec2.cpp" />
     <ClCompile Include="..\..\Src\Sound\Music.cpp" />
+    <ClCompile Include="..\..\Src\Sound\SoundEffect.cpp" />
     <ClCompile Include="..\..\src\Sprite\Sprite.cpp" />
     <ClCompile Include="..\..\src\System\Debug.cpp" />
     <ClCompile Include="..\..\src\Texture\Texture.cpp" />

Bin/VC10/VC10.vcxproj.filters

@@ -153,6 +153,12 @@
     <ClInclude Include="..\..\Src\Sound\Music.h">
       <Filter>Sound</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\Src\Sound\SoundEffect.h">
+      <Filter>Sound</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\src\Actor\NPC.h">
+      <Filter>Actor</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\src\Main\main.cpp">
@@ -242,5 +248,11 @@
     <ClCompile Include="..\..\Src\Sound\Music.cpp">
       <Filter>Sound</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\Src\Sound\SoundEffect.cpp">
+      <Filter>Sound</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\Actor\NPC.cpp">
+      <Filter>Actor</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>

src/Actor/Player.cpp

@@ -1,4 +1,7 @@
+#include <stdlib.h>
+
 #include "Player.h"
+#include "../Sound/SoundEffect.h"
 
 Player::Player(void) {
   PLAYER_SPEED      = 15;
@@ -17,6 +20,12 @@ Player::Player(void) {
   _environmentCollisionBound = new AABB();
   _environmentCollisionBound->SetMin(_collisionBound->GetMin().x, _collisionBound->GetMax().y - 50.0f);
   _environmentCollisionBound->SetMax(_collisionBound->GetMax().x, _collisionBound->GetMax().y);
+
+  _stepSFX[0] = sfxManager.Load("../Data/SFX/step_cloth1.wav");
+  _stepSFX[1] = sfxManager.Load("../Data/SFX/step_cloth2.wav");
+  _stepSFX[2] = sfxManager.Load("../Data/SFX/step_cloth3.wav");
+  _stepSFX[3] = sfxManager.Load("../Data/SFX/step_cloth4.wav");
+  _lastStepSFXPlayed = -1;
 }
 
 Player::~Player(void) {
@@ -68,8 +77,8 @@ bool Player::GetInBlueCollision(void) {
 }
 
 void Player::ProcessEvents(void) {
-  x = _player->GetX();
+  float oldX = x = _player->GetX();
-  y = _player->GetY();
+  float oldY = y = _player->GetY();
   if(KeyStillDown(SDLK_w)) {
     y -= PLAYER_SPEED;
     _player->SetY(y);
@@ -86,6 +95,18 @@ void Player::ProcessEvents(void) {
     x += PLAYER_SPEED;
     _player->SetX(x);
   }
+  if(x != oldX || y != oldY) {
+    if(!SoundEffect::IsPlaying(1)) {
+      int sfxIndex;
+      do {
+        sfxIndex = rand() % 4;
+      } while(sfxIndex == _lastStepSFXPlayed);
+
+      SoundEffect::Play(_stepSFX[sfxIndex], 1, 0);
+      
+      _lastStepSFXPlayed = sfxIndex;
+    }
+  }
 }
 
 int Player::GetWidth(void) { return _player->GetWidth(); }

src/Actor/Player.h

@@ -6,6 +6,7 @@
 #include "../IO/Input.h"
 
 class Sprite;
+class SoundEffect;
 
 // We will derive from an Actor class at some point.
 class Player {
@@ -66,4 +67,7 @@ private:
 
   AABB* _collisionBound;
   AABB* _environmentCollisionBound;
+
+  SoundEffect* _stepSFX[4];
+  int _lastStepSFXPlayed;
 };

src/Sound/SoundEffect.cpp

@@ -0,0 +1,33 @@
+#include <SDL/SDL_mixer.h>
+
+#include "SoundEffect.h"
+
+ResourceManager<SoundEffect> sfxManager;
+
+SoundEffect::SoundEffect() {
+  _chunk = NULL;
+}
+
+SoundEffect::~SoundEffect() {
+  if(_chunk) {
+    Mix_FreeChunk(_chunk);
+    _chunk = NULL;
+  }
+}
+
+bool SoundEffect::Load(const std::string& filename) {
+  _chunk = Mix_LoadWAV(filename.c_str());
+  return _chunk != NULL;
+}
+
+void SoundEffect::Play(SoundEffect* effect, int channel, int loops) {
+  Mix_PlayChannel(channel, effect->_chunk, loops);
+}
+
+void SoundEffect::Stop(int channel) {
+  Mix_HaltChannel(channel);
+}
+
+bool SoundEffect::IsPlaying(int channel) {
+  return Mix_Playing(channel);
+}

src/Sound/SoundEffect.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "../System/ResourceManager.h"
+
+struct Mix_Chunk;
+
+class SoundEffect : public Resource {
+  template<class T> friend class ResourceManager;
+
+public:
+  SoundEffect();
+  ~SoundEffect();
+
+  bool Load(const std::string& filename);
+
+  static void Play(SoundEffect* effect, int channel, int loops);
+  static void Stop(int channel);
+  static bool IsPlaying(int channel);
+
+private:
+  Mix_Chunk* _chunk;
+};
+
+extern ResourceManager<SoundEffect> sfxManager;