Irrlicht创建游戏GUI界面（演示程序+源代码）

#include <irrlicht.h> // 针对Windows系统的配置 #ifdef _IRR_WINDOWS_ #pragma comment( lib, "Irrlicht.lib" ) #pragma comment( linker, "/subsystem:windows /ENTRY:mainCRTStartup" ) #endif // 定义空指针 #ifndef nullptr #define nullptr 0 #endif using namespace irr; using namespace core; using namespace video; using namespace scene; using namespace gui; using namespace io; enum { ID_BACKPACK_BUTTON = 101 }; class RotateYCamera// 沿着Y轴旋转的FPS摄像机 { public: RotateYCamera( ISceneManager* pSceneManager, const vector3df& pos, const vector3df& view ) { m_pCamera = pSceneManager->addCameraSceneNode( nullptr, pos, view ); m_pCamera->setTarget( view ); m_pCamera->bindTargetAndRotation( true ); m_ViewLength = view.getLength( ); m_RotateAngle = 0.0f; } void Rotate( f32 rotateSpeed ) { m_pCamera->setTarget( vector3df( m_ViewLength * cos( m_RotateAngle ), 0.0f, m_ViewLength * sin( m_RotateAngle ) ) ); m_RotateAngle += rotateSpeed; if ( m_RotateAngle > PI * 2.0f ) m_RotateAngle = 0.0f; } private: f32 m_ViewLength; f32 m_RotateAngle; ICameraSceneNode* m_pCamera; }; void CreateMap( IrrlichtDevice* pDevice ) { ISceneManager* pSMgr = pDevice->getSceneManager( ); // 获取Quake3的地图 pDevice->getFileSystem( )->addZipFileArchive( "map-20kdm2.pk3" ); IAnimatedMesh* pMesh = pSMgr->getMesh( "20kdm2.bsp" ); ISceneNode* pNode = nullptr; if ( pMesh != nullptr )// 添加八叉树渲染场景节点 { pNode = pSMgr->addOctreeSceneNode( pMesh->getMesh( 0 ) ); } if ( pNode != nullptr )// 位置偏移修正 { pNode->setPosition( vector3df( -1300, -144, -1249 ) ); } } class ProgressBar// 进度条控件 { public: ProgressBar( IGUIEnvironment* pEnv, const position2di& pos, const path& fileName ): m_Pos( pos ) { ITexture* pTexture = pEnv->getVideoDriver( )->getTexture( fileName ); m_Size = pTexture->getSize( ); m_pImage = pEnv->addImage( rect<s32>( m_Pos, m_Size ), nullptr ); m_pImage->setImage( pTexture ); } void SetProgress( f32 progress ) { s32 lower = m_Pos.Y + m_Size.Height; s32 right = s32( f32( m_Size.Width ) * progress ) + m_Pos.X; m_pImage->setRelativePosition( rect<s32>( m_Pos.X, m_Pos.Y, right, lower ) ); } private: IGUIImage* m_pImage; position2di m_Pos; dimension2di m_Size; }; class GUIFontCommand// 用于渲染字体的命令 { public: GUIFontCommand( IGUIFont* pFont, stringw text, rect<s32> rect, SColor color ): m_pFont( pFont ), m_Text( text ), m_Rect( rect ), m_Color( color ) { } inline void Draw( void ) { m_pFont->draw( m_Text, m_Rect, m_Color ); } private: IGUIFont* m_pFont; stringw m_Text; rect<s32> m_Rect; SColor m_Color; }; typedef list<GUIFontCommand> GUIFontCommandList; void CreateGUI( IrrlichtDevice* pDevice, GUIFontCommandList& cmdList ) { IGUIEnvironment* pGUIEnv = pDevice->getGUIEnvironment( ); IVideoDriver* pDriver = pDevice->getVideoDriver( ); IGUIFont* pFont = pGUIEnv->getFont( "SAO.xml" );// 字体高为12像素 // 添加字体 s32 x = 120, y = 5; cmdList.push_back( GUIFontCommand( pFont, L"Jiangcaiyang", rect<s32>( x, y, x + 10, y += 15 ), SColor( 255, 255, 255, 255 ) ) ); y += 5; cmdList.push_back( GUIFontCommand( pFont, L"HP", rect<s32>( x, y, x + 10, y += 15 ), SColor( 255, 255, 255, 255 ) ) ); cmdList.push_back( GUIFontCommand( pFont, L"MP", rect<s32>( x, y, x + 10, y += 15 ), SColor( 255, 255, 255, 255 ) ) ); // 添加玩家头像 pGUIEnv->addImage( pDriver->getTexture( "PlayerAvatar.png" ), vector2d<s32>( 10, 10 ) ); // 添加HP条和MP条 ProgressBar HPBar( pGUIEnv, position2di( 140, 44 ), L"HPBar.png" ); ProgressBar MPBar( pGUIEnv, position2di( 140, 59 ), L"MPBar.png" ); // 添加背包按钮控件 ITexture* pBackpackTex = pDriver->getTexture( L"Backpack.png" ); position2di backpackPos( 550, 400 ); dimension2di backpackSize( 32, 32 ); if ( pBackpackTex != nullptr ) { backpackSize = pBackpackTex->getSize( ); } IGUIButton* pBackpackButton = pGUIEnv->addButton( rect<s32>( backpackPos, backpackSize ), nullptr, ID_BACKPACK_BUTTON ); pBackpackButton->setUseAlphaChannel( true ); pBackpackButton->setDrawBorder( false ); pBackpackButton->setImage( pBackpackTex ); cmdList.push_back( GUIFontCommand(// 添加Backpack文字说明 pFont, L"Backpack", rect<s32>( 545, 430, 580, 450 ), SColor( 255, 255, 255, 255 ) ) ); // 添加一些图片 } class EventReceiver: public IEventReceiver { public: EventReceiver( IGUIEnvironment* pEnv ): m_pEnv( pEnv ) { } virtual bool OnEvent( const SEvent& event ) { if ( event.EventType == EET_GUI_EVENT ) { s32 id = event.GUIEvent.Caller->getID( ); switch ( event.GUIEvent.EventType ) { case EGET_BUTTON_CLICKED: switch ( id ) { case ID_BACKPACK_BUTTON: { IGUIWindow* pWindow = m_pEnv->addWindow( rect<s32>( 300, 200, 500, 300 ) ); pWindow->setText( L"Equipment" ); IGUIListBox* pList = m_pEnv->addListBox( rect<s32>( 1, 20, 196, 100 ), pWindow ); pList->addItem( L"Golden sword" ); pList->addItem( L"Magician's cloak" ); pList->addItem( L"Revive water" ); return true; } default: break; } default: break; } } return false; } private: IGUIEnvironment* m_pEnv; }; int main( int argc, char** argv ) { IrrlichtDevice* pDevice = createDevice( EDT_OPENGL, // 渲染设备 dimension2d<u32>( 640, 480 ), // 宽和高 16, // 颜色位 false, // 是否全屏 false, // 模版缓存 false, // 垂直同步 nullptr ); // 事件接收器 if ( pDevice == nullptr ) return -1; pDevice->setWindowCaption( L"鬼火引擎演示 - GUI的使用" ); IVideoDriver* pDriver = pDevice->getVideoDriver( ); ISceneManager* pSMgr = pDevice->getSceneManager( ); IGUIEnvironment* pGUIEnv = pDevice->getGUIEnvironment( ); GUIFontCommandList cmdList; CreateMap( pDevice ); CreateGUI( pDevice, cmdList ); EventReceiver receiver( pGUIEnv ); pDevice->setEventReceiver( &receiver ); // 创建一FPS摄像机 RotateYCamera camera( pSMgr, vector3df( 0.0f, 0.0f, 0.0f ), vector3df( 5.0f, 0.0f, 5.0f ) ); u32 then = pDevice->getTimer( )->getTime( ); while ( pDevice->run( ) ) { pDriver->beginScene( true, // 后台缓存 true, // Z缓存 SColor( 255, 255, 255, 255 ) ); // 填充颜色 pSMgr->drawAll( ); pGUIEnv->drawAll( ); for ( GUIFontCommandList::Iterator iter = cmdList.begin( ); iter != cmdList.end( ); iter++ ) { iter->Draw( )