我的第一个DirectX程序界面及三角形的绘制

ccf19881030

发布于 2019-04-23 15:00:23

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发布于 2019-04-23 15:00:23

文章被收录于专栏：ccf19881030的博客ccf19881030的博客

一下是我的第一个DirecX界面程序，

有点像MFC、和Win32的程序。

可以新建一个Win32 Application工程文件，命名为test

再新建一个cpp文件test.cpp

代码如下：

#include <d3d9.h>

#pragma comment(lib,"d3d9.lib")
#pragma comment(lib,"d3dx9.lib")
#pragma comment(lib,"winmm.lib")

//D3D Object and D3D Device Object
LPDIRECT3D9			g_pD3D = NULL;
LPDIRECT3DDEVICE9	g_pD3DDevice = NULL;


LRESULT CALLBACK MsgProc(
							HWND hwnd,      // handle to window
							UINT uMsg,      // message identifier
							WPARAM wParam,  // first message parameter
							LPARAM lParam   // second message parameter
							);
HRESULT InitD3D(HWND hwnd);
VOID Cleanup();
VOID Render();

// the entrance of program
int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd )
{
	// register window class
	WNDCLASS wndclass;
	wndclass.style = 0; 
	wndclass.lpfnWndProc = MsgProc;
	wndclass.cbClsExtra = 0;
	wndclass.cbWndExtra = 0;
	wndclass.hInstance = hInstance;
	wndclass.hIcon = NULL;
	wndclass.hCursor = NULL;
	wndclass.hbrBackground = NULL;
	wndclass.lpszMenuName = NULL;
	wndclass.lpszClassName = "MyD3D";

	RegisterClass(&wndclass);

	//Create the application's window
	HWND hwnd = CreateWindow("MyD3D","My first Direct3D Program",WS_OVERLAPPEDWINDOW,100,100,600,400,
		GetDesktopWindow(),NULL,wndclass.hInstance,NULL);

	if (SUCCEEDED(InitD3D(hwnd)))
	{
		//Show Window
		ShowWindow(hwnd,SW_SHOWDEFAULT);
		UpdateWindow(hwnd);

		MSG msg;
		while (GetMessage(&msg,NULL,0,0))
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	// 
	Cleanup();
	UnregisterClass("MyD3D",wndclass.hInstance);
	return 0;
}

LRESULT CALLBACK MsgProc(
						 HWND hwnd,      // handle to window
						 UINT uMsg,      // message identifier
						 WPARAM wParam,  // first message parameter
						 LPARAM lParam   // second message parameter
							)
{
	switch (uMsg)
	{
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	case WM_PAINT:
		Render();
		ValidateRect(hwnd,NULL);
		return 0;
	}
	return DefWindowProc(hwnd,uMsg,wParam,lParam);

}

HRESULT InitD3D(HWND hwnd)
{
	if (NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)))
	{
		return E_FAIL;
	}

	//display Mode
	D3DDISPLAYMODE d3ddm;
	if (FAILED(g_pD3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT,&d3ddm)))
	{
		return E_FAIL;
	}

	// parameters of D3D
	D3DPRESENT_PARAMETERS d3dpp;
	ZeroMemory(&d3dpp,sizeof(d3dpp));
	d3dpp.Windowed = true;
	d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
	d3dpp.BackBufferFormat = d3ddm.Format;

	if (FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hwnd,D3DCREATE_SOFTWARE_VERTEXPROCESSING,&d3dpp,&g_pD3DDevice)))
	{
		return E_FAIL;
	}

	return S_OK;
}

VOID Cleanup()
{
	if(g_pD3DDevice != NULL)
		g_pD3DDevice->Release();
	if(g_pD3D != NULL)
		g_pD3D->Release();
}

VOID Render()
{
	if(NULL == g_pD3DDevice)
		return ;

	g_pD3DDevice->Clear(0,NULL,D3DCLEAR_TARGET,D3DCOLOR_XRGB(0,0,255),1.0f,0);

	g_pD3DDevice->BeginScene();

	g_pD3DDevice->EndScene();

	g_pD3DDevice->Present(NULL,NULL,NULL,NULL);
}

运行之后会弹出一个深蓝色的窗口。

下面是在上面代码的基础上，在界面绘制的三角形。

步骤如下：

1)创建顶点缓存

2）访问顶点缓存

3）绘制三角形

代码如下：

#include <d3d9.h>

#pragma comment(lib,"d3d9.lib")
#pragma comment(lib,"d3dx9.lib")
#pragma comment(lib,"winmm.lib")

//D3D Object and D3D Device Object
LPDIRECT3D9			g_pD3D = NULL;
LPDIRECT3DDEVICE9	g_pD3DDevice = NULL;
/*******************************************/
LPDIRECT3DVERTEXBUFFER9	g_pVB = NULL;

struct CUSTOMVERTEX
{
	float x,y,z,thw;
	DWORD color;
};

#define D3DFVF_CUSTOMVERTEX D3DFVF_XYZRHW | D3DFVF_DIFFUSE
/*******************************************/
LRESULT CALLBACK MsgProc(
							HWND hwnd,      // handle to window
							UINT uMsg,      // message identifier
							WPARAM wParam,  // first message parameter
							LPARAM lParam   // second message parameter
							);
HRESULT InitD3D(HWND hwnd);
VOID Cleanup();
VOID Render();
//////////////////////////////////
HRESULT InitVB();
////////////////////////////////

// the entrance of program
int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd )
{
	// register window class
	WNDCLASS wndclass;
	wndclass.style = 0; 
	wndclass.lpfnWndProc = MsgProc;
	wndclass.cbClsExtra = 0;
	wndclass.cbWndExtra = 0;
	wndclass.hInstance = hInstance;
	wndclass.hIcon = NULL;
	wndclass.hCursor = NULL;
	wndclass.hbrBackground = NULL;
	wndclass.lpszMenuName = NULL;
	wndclass.lpszClassName = "MyD3D";

	RegisterClass(&wndclass);

	//Create the application's window
	HWND hwnd = CreateWindow("MyD3D","My first Direct3D Program",WS_OVERLAPPEDWINDOW,100,100,600,400,
		GetDesktopWindow(),NULL,wndclass.hInstance,NULL);

	if (SUCCEEDED(InitD3D(hwnd)))
	{
		if(SUCCEEDED(InitVB()))
		{
			//Show Window
			ShowWindow(hwnd,SW_SHOWDEFAULT);
			UpdateWindow(hwnd);

			MSG msg;
			while (GetMessage(&msg,NULL,0,0))
			{
				TranslateMessage(&msg);
				DispatchMessage(&msg);
			}
		}
	}

	// 
	Cleanup();
	UnregisterClass("MyD3D",wndclass.hInstance);
	return 0;
}

LRESULT CALLBACK MsgProc(
						 HWND hwnd,      // handle to window
						 UINT uMsg,      // message identifier
						 WPARAM wParam,  // first message parameter
						 LPARAM lParam   // second message parameter
							)
{
	switch (uMsg)
	{
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	case WM_PAINT:
		Render();
		ValidateRect(hwnd,NULL);
		return 0;
	}
	return DefWindowProc(hwnd,uMsg,wParam,lParam);

}

HRESULT InitD3D(HWND hwnd)
{
	if (NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)))
	{
		return E_FAIL;
	}

	//display Mode
	D3DDISPLAYMODE d3ddm;
	if (FAILED(g_pD3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT,&d3ddm)))
	{
		return E_FAIL;
	}

	// parameters of D3D
	D3DPRESENT_PARAMETERS d3dpp;
	ZeroMemory(&d3dpp,sizeof(d3dpp));
	d3dpp.Windowed = true;
	d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
	d3dpp.BackBufferFormat = d3ddm.Format;

	if (FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hwnd,D3DCREATE_SOFTWARE_VERTEXPROCESSING,&d3dpp,&g_pD3DDevice)))
	{
		return E_FAIL;
	}

	return S_OK;
}

VOID Cleanup()
{
	if(g_pVB !=NULL)
		g_pVB->Release();
	if(g_pD3DDevice != NULL)
		g_pD3DDevice->Release();
	if(g_pD3D != NULL)
		g_pD3D->Release();
}

VOID Render()
{
	if(NULL == g_pD3DDevice)
		return ;
	
	g_pD3DDevice->Clear(0,NULL,D3DCLEAR_TARGET,D3DCOLOR_XRGB(0,0,255),1.0f,0);
	
	g_pD3DDevice->BeginScene();
	////////////////////////
	g_pD3DDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
	g_pD3DDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
	g_pD3DDevice->DrawPrimitive(D3DPT_TRIANGLELIST,0,1);
	//////////////////////////
	g_pD3DDevice->EndScene();
	
	g_pD3DDevice->Present(NULL,NULL,NULL,NULL);
}

HRESULT InitVB()
{
	CUSTOMVERTEX g_vertex[]={
		{150.0f,50.0f,0.5f,1.0f,0xffff0000},
		{250.0f,250.0f,0.5f,1.0f,0xff00ff00},
		{50.0f,250.0f,0.5f,1.0f,0xff0000ff}};
		
		if(FAILED(g_pD3DDevice->CreateVertexBuffer(3*sizeof(CUSTOMVERTEX),0,
			D3DFVF_CUSTOMVERTEX,D3DPOOL_DEFAULT,&g_pVB,NULL)))
		{
			return E_FAIL;
		}
		
		VOID *pvertex;
		if(FAILED(g_pVB->Lock(0,sizeof(g_vertex),(void **)&pvertex,0)))
		{
			return E_FAIL;
		}
		memcpy(pvertex,g_vertex,sizeof(g_vertex));
		g_pVB->Unlock();
		
		return S_OK;
		
		
		
}

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原始发表：2010年09月17日，如有侵权请联系 cloudcommunity@tencent.com 删除

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