ogre做图像引擎MITA做音频引擎做游戏的源代码

In this project I simply add 4 objects with their own sound.There is 4 different sound effects. 1,a speaker plays a background music on the ground. 2,a helicopter flies in air. 3,a car runs on the ground. 4,a F18 plane flies in air. You can run to everywhere in this world to hear these sounds. I use MITA for Audio Engine here.Because MITA is very simply and flexible to use.Even it is more simply and high performance-price ratio than fmod.With lossless timbre,it also high efficient.You can access to www.migantech.com to know more. How to build a project like this: 0.Download a OgreSDK and MITA sdk package.Install OgreSDK. 1.Copy [mita.h] to project \include path. 2.Copy [mita.lib] and [mitaD.lib] under "library\VC" of the sdk package to the project \lib path.For example: I use ogre for my game engine,then I copy [mita.lib] to "OgreSDK_vc9_v1-7-2\lib\release" and copy [mitaD.lib] to "OgreSDK_vc9_v1-7-2\lib\debug".I use vs2008 to compile the project, so I add [mita.lib] and [mitaD.lib] to the linker. 3.Copy [mita.lib] and [mitaD.lib] to release and debug output path. For example:"OgreSDK_vc9_v1-7-2\bin" 4.Copy the plugins you want to use to the project plugins path. For example:"OgreSDK_vc9_v1-7-2\plugins".You can know their plugin type by their prefix. [cdc_mapl.dll] is used to make a playlist. dec_* is decode plugin. dev_* is audio device plugin. dsp_* is sound effect plugin. For example: I use two of them:[dec_ogg.dll] to play ogg music,[dev_mme.dll] to use mme device driver. 5.Copy the music or sound files to the right place.The format of the music files should be one of your decode plugins type. For example: I put [123.ogg] to "OgreSDK_vc9_v1-7-2\media",then I write in the code Param.lpPath = (MITA_LPCWSTR)L"../../media/123.ogg" to play it. How to play the sound(Example for ogre): 1.Init the audio devices, see initMitaDevice() function. 2.For this 3D game, sounds have their own position and direction.The Listener should be the same place with our character even if our character moves around.You can handle it in the frameRenderingQueued() function.Our character update it's position and direction after 'evt.timeSinceLastFrame'.Now we let the Listener be updated by MITA_Input_Move3D() and MITA_Listener_SetDirection().See updateBody(Real deltaTime) function. 3.Play the sound.To play a static sound is very very simply.See playSpMusic() function.To play a movable sound also very simply.Just to use one more function MITA_Input_Move3D()! We also handle it in frameRenderingQueued() function. See f18addTime() and caraddTime(). Note: 1.I have 6 speakers, so I set MITA_GuessChannelMode(6, &ChannelMask). If you just use a headphone to play it, you should set MITA_GuessChannelMode(2, &ChannelMask).Because there is only two speakers. 2.MITA_Listener_SetPosition() and MITA_Listener_SetVelocity() usually are used together.So for the simple way, we can use MITA_Input_Move3D() as it is the same effect with the two functions mentioned before. 3.The minDis and maxDis in MITA_Input_SetDistance3D() is not the spread range of the sound.They are the min and max distence of change of the sound.Sound will never change if the distence between listener and sound source is smaller than the minDis or bigger than the maxDis.The maxDis should not be set smaller than 100.If you want to control the spread range of the sound, you can use MITA_Input_SetVolume(),MITA_Input_SetRollOff3D() and MITA_Input_SetStrength3D().Also you can stop to play the sound according to the distence(Usually used for a soundproof wall). 4.About MITA_Input_SetDirection3D(),"at" and "up" vectors must be of unit length and perpendicular to each other.If you got the degree of the character turned,you can just use MITA_Listener_SetDirectionAngle().See updateBody(Real deltaTime). 5.Don't forget to CloseHandle and RemoveSource.See mitademo::~mitademo(void). 6.dec_base.dll is used to play wma,tta and so on.