游戏开发学习笔记-2.引擎初现

来源：互联网发布：书生阅读软件编辑：程序博客网时间：2024/05/16 16:22

继上一篇，增加了一个微小的引擎类，此类还不具备基本的引擎功能，后面慢慢填充。

首先是引擎类的头文件声明

#ifndef _ENGINE_H_#define _ENGINE_H_#include <windows.h>#include <d3d9.h>#include <d3dx9.h>#include "Functions.h"#pragma comment(lib,"d3d9.lib")#pragma comment(lib,"d3dx9.lib")//引擎类~引擎虽小，五脏俱全class Engine{public:Engine();~Engine();bool Init(HWND hwnd,UINT uWidth,UINT uHeight,bool bFullscreen=false );//初始化  ~看字明意void ClearScreen(D3DCOLOR color=D3DCOLOR_XRGB(0,0,0));//清屏 ~简洁明了void StartRender();//开始渲染~看字明意void EndRender();//结束渲染~看字明意void Shutdown();//关闭~看字明意private:LPDIRECT3D9 m_D3d;//D3D接口指针LPDIRECT3DDEVICE9 m_Dev;//D3D设备HWND hMainHwnd;//窗口句柄 ~不知道要不要用};#endif

然后是引擎类的实现

#include "Engine.h"Engine::Engine(){m_Dev=NULL;m_D3d=NULL;hMainHwnd=NULL;}Engine::~Engine(){Shutdown();//关闭引擎}bool Engine::Init( HWND hwnd,UINT uWidth,UINT uHeight,bool bFullscreen ){if (NULL==(m_D3d=Direct3DCreate9(D3D_SDK_VERSION)))//获取D3D接口指针{ShowMessage("创建D3D接口失败！");return false;}D3DPRESENT_PARAMETERS d3dpp;ZeroMemory(&d3dpp,sizeof(d3dpp));d3dpp.BackBufferCount=1;//缓冲数量d3dpp.BackBufferWidth=uWidth;//缓冲宽度d3dpp.BackBufferHeight=uHeight;//缓冲高度d3dpp.BackBufferFormat=D3DFMT_X8R8G8B8;//缓冲格式d3dpp.EnableAutoDepthStencil=TRUE;//开启自动深度缓冲d3dpp.AutoDepthStencilFormat=D3DFMT_D24S8;//深度缓冲格式d3dpp.Windowed=!bFullscreen;//是否全屏d3dpp.hDeviceWindow=hwnd;//设备窗口d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD; //交换效果//创建D3D设备if (FAILED(m_D3d->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hwnd,D3DCREATE_HARDWARE_VERTEXPROCESSING,&d3dpp,&m_Dev))){ShowMessage("创建D3D设备失败！");return false;}return true;}void Engine::Shutdown(){SAFE_RELEASE(m_Dev);SAFE_RELEASE(m_D3d);}void Engine::ClearScreen( D3DCOLOR color/*=D3DCOLOR_XRGB(0,0,0)*/ ){m_Dev->Clear(0,NULL,D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER,color,1.0f,0);}void Engine::StartRender(){m_Dev->BeginScene();}void Engine::EndRender(){m_Dev->EndScene();m_Dev->Present(NULL,NULL,NULL,NULL);}

另外增加了一个公共函数文件

#ifndef _FUNCTIONS_H_#define _FUNCTIONS_H_#include <windows.h>#define SAFE_RELEASE(P) {if (P!=NULL){P->Release();P=NULL;}}void ShowMessage(LPCSTR lpStr);#endif

#include "Functions.h"void ShowMessage( LPCSTR lpStr ){MessageBox(NULL,lpStr,"Info",MB_OK);}

最后是WinMain窗体的代码，继上一篇的代码，修改部分代码

#include <windows.h>#include "Engine.h"#define WIN_CLASS "dx01"//窗体类名#define WIN_NAME "dx01"//窗体标题#define WIN_WIDTH 800//窗体宽度#define WIN_HEIGHT 600//窗体高度#define WIN_FULLSCREEN false //是否全屏Engine engine; //引擎对象//循环void GameLoop();//Windows消息回调函数LRESULT CALLBACK WndProc(HWND hwnd,UINT msg,WPARAM wparam,LPARAM lparam){switch(msg){case WM_DESTROY:PostQuitMessage(0);break;case WM_KEYUP:if (wparam==VK_ESCAPE){PostQuitMessage(0);}break;}return DefWindowProc(hwnd,msg,wparam,lparam);}//Window入口函数int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd ){//设置窗口结构类属性WNDCLASSEX wc={sizeof(WNDCLASSEX),CS_CLASSDC,WndProc,0,0,hInstance,NULL,NULL,NULL,NULL,WIN_CLASS,NULL};//注册窗口类型RegisterClassEx(&wc);//创建窗口HWND hwnd= CreateWindow(WIN_CLASS,WIN_NAME,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,WIN_WIDTH,WIN_HEIGHT,NULL,NULL,hInstance,NULL);if (hwnd){ShowWindow(hwnd,nShowCmd);//显示窗口UpdateWindow(hwnd);//更新窗口if (engine.Init(hwnd,WIN_WIDTH,WIN_HEIGHT)){MSG msg;ZeroMemory(&msg,sizeof(msg));//窗口消息循环while (msg.message!=WM_QUIT){if (PeekMessage(&msg,NULL,0U,0U,PM_REMOVE)){TranslateMessage(&msg);//转换消息DispatchMessage(&msg);//分派消息}else{GameLoop();}}engine.Shutdown();}}UnregisterClass(WIN_CLASS,wc.hInstance);return 0;}void GameLoop(){engine.StartRender(); //开始渲染engine.EndRender(); //结束渲染}

运行截图

源代码下载：

http://download.csdn.net/detail/qq578023708/8794921

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