DirectX11 学习笔记1 - 第一个程序

Posted 2020-09-24 lytwajue

为了加快学习速度，和使程序更加easy理解。  我把sampler tutorial里面的一个样例 的固定代码和常常修改的代码经过简单的类的封装了一下。

以后学习的时候就能够仅仅在还有一个文件写render渲染代码和fx着色器代码了

D3DBase.h  基本框架代码

#include <windows.h>
#include <d3d11.h>
#include <d3dx11.h>
#include <d3dcompiler.h>
#include <xnamath.h>
#include "resource.h"

//--------------------------------------------------------------------------------------
// Global Variables
//--------------------------------------------------------------------------------------
HINSTANCE               g_hInst = NULL;
HWND                    g_hWnd = NULL;
D3D_DRIVER_TYPE         g_driverType = D3D_DRIVER_TYPE_NULL;
D3D_FEATURE_LEVEL       g_featureLevel = D3D_FEATURE_LEVEL_11_0;
ID3D11Device*           g_pd3dDevice = NULL;
ID3D11DeviceContext*    g_pImmediateContext = NULL;
IDXGISwapChain*         g_pSwapChain = NULL;
ID3D11RenderTargetView* g_pRenderTargetView = NULL;
ID3D11VertexShader*     g_pVertexShader = NULL;
ID3D11PixelShader*      g_pPixelShader = NULL;
ID3D11InputLayout*      g_pVertexLayout = NULL;
ID3D11Buffer*           g_pVertexBuffer = NULL;    //顶点缓冲
ID3D11Buffer*           g_pIndexBuffer = NULL;     //顶点索引
ID3D11Buffer*           g_pConstantBuffer = NULL;  //转换矩阵
//转换矩阵
XMMATRIX                g_World;
XMMATRIX                g_View;
XMMATRIX                g_Projection;

//--------------------------------------------------------------------------------------
// Structures
//--------------------------------------------------------------------------------------
struct SimpleVertex
{
	XMFLOAT3 Pos;//位置
	XMFLOAT4 Color;//颜色
};
struct ConstantBuffer
{
	XMMATRIX mWorld;//世界矩阵
	XMMATRIX mView;//观察矩阵
	XMMATRIX mProjection;//投影矩阵
};
class D3DBase
{
public:
	//--------------------------------------------------------------------------------------
	// Forward declarations
	//--------------------------------------------------------------------------------------
	HRESULT InitWindow( HINSTANCE hInstance, int nCmdShow,float w,float h );
	virtual HRESULT InitDevice();
	virtual void Render()=0;
	virtual HRESULT VertexIndex()=0;
	virtual HRESULT VS_Shader();
	virtual HRESULT InputLayout();
	virtual HRESULT PS_Shader();
	static int BeginD3D(D3DBase &d3d,HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nCmdShow);
	virtual void CleanupDevice();
	virtual HRESULT CompileShaderFromFile( WCHAR* szFileName, LPCSTR szEntryPoint, LPCSTR szShaderModel, ID3DBlob** ppBlobOut );
public:
	ID3DBlob* pVSBlob,*pPSBlob;
	UINT width;
	UINT height;
};
LRESULT CALLBACK   WndProc( HWND, UINT, WPARAM, LPARAM );

//--------------------------------------------------------------------------------------
// Register class and create window
//--------------------------------------------------------------------------------------
HRESULT D3DBase::InitWindow( HINSTANCE hInstance, int nCmdShow,float w,float h )
{
	// Register class
	WNDCLASSEX wcex;
	wcex.cbSize = sizeof( WNDCLASSEX );
	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = WndProc;
	wcex.cbClsExtra = 0;
	wcex.cbWndExtra = 0;
	wcex.hInstance = hInstance;
	wcex.hIcon = LoadIcon( hInstance, ( LPCTSTR )IDI_TUTORIAL1 );
	wcex.hCursor = LoadCursor( NULL, IDC_ARROW );
	wcex.hbrBackground = ( HBRUSH )( COLOR_WINDOW + 1 );
	wcex.lpszMenuName = NULL;
	wcex.lpszClassName = L"TutorialWindowClass";
	wcex.hIconSm = LoadIcon( wcex.hInstance, ( LPCTSTR )IDI_TUTORIAL1 );
	if( !RegisterClassEx( &wcex ) )
		return E_FAIL;

	// Create window
	g_hInst = hInstance;
	RECT rc = { 0, 0, w, h };
	AdjustWindowRect( &rc, WS_OVERLAPPEDWINDOW, FALSE );
	g_hWnd = CreateWindow( L"TutorialWindowClass", L"Direct3D 11 Tutorial 3: Shaders",
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left, rc.bottom - rc.top, NULL, NULL, hInstance,
		NULL );
	if( !g_hWnd )
		return E_FAIL;

	ShowWindow( g_hWnd, nCmdShow );

	return S_OK;
}



//--------------------------------------------------------------------------------------
// Create Direct3D device and swap chain
//--------------------------------------------------------------------------------------
HRESULT D3DBase::InitDevice()
{
	HRESULT hr = S_OK;

	RECT r