D3D 线列小样例-白红宇

D3D 线列小样例

阅读量：5772 次

发布时间：2019-06-18

本文共 3669 字，大约阅读时间需要 12 分钟。

画两条线

#pragma once#pragma comment(lib,"d3d9.lib")#pragma comment(lib,"d3dx9.lib")#include
     
      #include
      
       //TODO: -1 custom vertexstruct CUSTOMVERTEX{	float x;	float y;	float z;	float rhw;};#define D3DFVF_CUSTOMVERTEX D3DFVF_XYZRHWHRESULT InitD3D(HWND hWnd);void CleanUp();void Render();LRESULT CALLBACK MsgProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam);HRESULT InitD3DVertexBuffer();//TODO: 0 declare d3d variables.LPDIRECT3D9 g_pd3d = NULL;LPDIRECT3DDEVICE9 g_pd3dDevice9 = NULL;LPDIRECT3DVERTEXBUFFER9 g_pd3dVB = NULL;//application entry point.INT WINAPI wWinMain(	HINSTANCE,	HINSTANCE,	LPWSTR,	INT){	//initialize wnd class.	WNDCLASSEX wcex;	ZeroMemory(&wcex,sizeof(wcex));	wcex.cbSize=sizeof(wcex);	wcex.hInstance=GetModuleHandle(NULL);	wcex.lpfnWndProc=MsgProc;	wcex.lpszClassName=L"Self001";	wcex.style=CS_CLASSDC;	//register wnd class.	RegisterClassEx(&wcex);	//create window.	HWND hWnd=CreateWindowEx(		WS_EX_OVERLAPPEDWINDOW,		L"Self001",		L"Self001 Window",		WS_OVERLAPPEDWINDOW,		100,		100,		300,		300,		NULL,		NULL,		wcex.hInstance,		NULL);	//init d3d	if(SUCCEEDED(InitD3D(hWnd)))	{		//show window.		ShowWindow(hWnd,SW_SHOWDEFAULT);		UpdateWindow(hWnd);		//message loop.		MSG msg;		ZeroMemory(&msg,sizeof(msg));		while(msg.message != WM_QUIT)		{			if(PeekMessage(&msg,hWnd,0,0,PM_REMOVE))			{				TranslateMessage(&msg);				DispatchMessage(&msg);			}			else			{				Render();			}		}	}	//unregister wnd class.	UnregisterClass(L"Self001",wcex.hInstance);	return 0;}//init d3d.HRESULT InitD3D(HWND hWnd){	//create d3d.	g_pd3d=Direct3DCreate9(D3D_SDK_VERSION);	if(g_pd3d == NULL)	{		return E_FAIL;	}	//initialize d3d present parameters.	D3DPRESENT_PARAMETERS d3dpp;	ZeroMemory(&d3dpp,sizeof(d3dpp));	d3dpp.Windowed=TRUE;	d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD;	d3dpp.BackBufferFormat=D3DFMT_UNKNOWN;	//create d3d device.	if(FAILED(g_pd3d->CreateDevice(		D3DADAPTER_DEFAULT,		D3DDEVTYPE_HAL,		hWnd,		D3DCREATE_SOFTWARE_VERTEXPROCESSING,		&d3dpp,		&g_pd3dDevice9)))	{		return E_FAIL;	}	//init vertex buffer.	if(FAILED(InitD3DVertexBuffer()))	{		return E_FAIL;	}	return S_OK;}//clean up d3d.void CleanUp(){	//TODO: 3 clean up d3d.	if(g_pd3dVB != NULL)	{		g_pd3dVB->Release();	}	//release device.	if(g_pd3dDevice9 != NULL)	{		g_pd3dDevice9->Release();	}	//release d3d.	if(g_pd3d != NULL)	{		g_pd3d->Release();	}}//render the scene.void Render(){	//clear target.	g_pd3dDevice9->Clear(		0,		NULL,		D3DCLEAR_TARGET,		D3DCOLOR_XRGB(0,0,0),		1.0f,		0);	//draw primitive.	if(SUCCEEDED(g_pd3dDevice9->BeginScene()))	{		//TODO: 2 render d3d.		g_pd3dDevice9->SetStreamSource(0,g_pd3dVB,0,sizeof(CUSTOMVERTEX));		g_pd3dDevice9->SetFVF(D3DFVF_CUSTOMVERTEX);		g_pd3dDevice9->DrawPrimitive(D3DPT_LINELIST,0,2);		g_pd3dDevice9->EndScene();	}	//present sence.	g_pd3dDevice9->Present(NULL,NULL,NULL,NULL);}//window message handler.LRESULT CALLBACK MsgProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam){	switch(msg)	{	case WM_DESTROY:		CleanUp();		return 0L;	}	return DefWindowProc(hWnd,msg,wParam,lParam);}//init d3d vertex buffer.HRESULT InitD3DVertexBuffer(){	//TODO: 1 init vertex buffer data.	//create vertex data.	CUSTOMVERTEX vertices[4]=	{		{50.0f,50.0f,1.0f,1.0f},		{50.0f,250.0f,1.0f,1.0f},		{250.0f,50.0f,1.0f,1.0f},		{250.0f,250.0f,1.0f,1.0f}	};	//create vertex buffer.	if(FAILED(g_pd3dDevice9->CreateVertexBuffer(		sizeof(vertices),		0,		D3DFVF_CUSTOMVERTEX,		D3DPOOL_DEFAULT,		&g_pd3dVB,		NULL)))	{		return E_FAIL;	}	//fill vertex buffer.	void* pVertices=NULL;	if(FAILED(g_pd3dVB->Lock(0,sizeof(vertices),&pVertices,0)))	{		return E_FAIL;	}	memcpy(pVertices,vertices,sizeof(vertices));	g_pd3dVB->Unlock();	return S_OK;}

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