d3dxcreatetext.cpp

一个自己写的实现3D字体旋转的demo.适合学习DX9与游戏开发的人的学习。

//////////////////////////////////////////////////////////////////////////////////////////////////
// 
// File: d3dxcreatetext.cpp
// 
// Author: Frank Luna (C) All Rights Reserved
//
// System: AMD Athlon 1800+ XP, 512 DDR, Geforce 3, Windows XP, MSVC++ 7.0 
//
// Desc: Demonstrates how to create and render 3D Text using D3DXCreateText.
//          
//////////////////////////////////////////////////////////////////////////////////////////////////

#include "d3dUtility.h"

//
// Globals
//

IDirect3DDevice9* Device = 0; 

const int Width  = 640;
const int Height = 480;

ID3DXMesh* Text = 0;

//
// Framework functions
//
bool Setup()
{
	//
	// Get a handle to a device context.
	//
	HDC hdc = CreateCompatibleDC( 0 );
    HFONT hFont;
    HFONT hFontOld;

	//
	// Describe the font we want.
	//

    LOGFONT lf;
	ZeroMemory(&lf, sizeof(LOGFONT));

	lf.lfHeight         = 25;    // in logical units
	lf.lfWidth          = 12;    // in logical units
	lf.lfEscapement     = 0;        
	lf.lfOrientation    = 0;     
	lf.lfWeight         = 500;   // boldness, range 0(light) - 1000(bold)
	lf.lfItalic         = false;   
	lf.lfUnderline      = false;    
	lf.lfStrikeOut      = false;    
	lf.lfCharSet        = DEFAULT_CHARSET;
	lf.lfOutPrecision   = 0;              
	lf.lfClipPrecision  = 0;          
	lf.lfQuality        = 0;           
	lf.lfPitchAndFamily = 0;    
	strcpy(lf.lfFaceName, "Times New Roman"); // font style

	//
	// Create the font and select it with the device context.
	//
    hFont = CreateFontIndirect(&lf);
    hFontOld = (HFONT)SelectObject(hdc, hFont); 

	//
	// Create the text mesh based on the selected font in the HDC.
	//
    D3DXCreateText(Device, hdc, "Direct3D", 
        0.001f, 0.4f, &Text, 0, 0);

	//
	// Restore the old font and free the acquired HDC.
	//
    SelectObject(hdc, hFontOld);
    DeleteObject( hFont );
    DeleteDC( hdc );

	//
	// Lights.
	//

	D3DXVECTOR3 dir(0.0f, -0.5f, 1.0f);
	D3DXCOLOR col = d3d::WHITE;
	D3DLIGHT9 light = d3d::InitDirectionalLight(&dir, &col);

	Device->SetLight(0, &light);
	Device->LightEnable(0, true);

	Device->SetRenderState(D3DRS_NORMALIZENORMALS, true);
	Device->SetRenderState(D3DRS_SPECULARENABLE, true);

	//
	// Set camera.
	//

	D3DXVECTOR3 pos(0.0f, 1.5f, -3.3f);
	D3DXVECTOR3 target(0.0f, 0.0f, 0.0f);
	D3DXVECTOR3 up(0.0f, 1.0f, 0.0f);

	D3DXMATRIX V;
	D3DXMatrixLookAtLH(
		&V,
		&pos,
		&target,
		&up);

	Device->SetTransform(D3DTS_VIEW, &V);

	//
	// Set projection matrix.
	//

	D3DXMATRIX proj;
	D3DXMatrixPerspectiveFovLH(
			&proj,
			D3DX_PI * 0.25f, // 45 - degree
			(float)Width / (float)Height,
			0.01f,
			1000.0f);
	Device->SetTransform(D3DTS_PROJECTION, &proj);

	return true;
}

void Cleanup()
{
	d3d::Release<ID3DXMesh*>(Text);
}

bool Display(float timeDelta)
{
	if( Device )
	{
		//
		// Update: Spin the 3D text.
		//

		D3DXMATRIX yRot, T;

		static float y = 0.0f;

		D3DXMatrixRotationY(&yRot, y);
		y += timeDelta;

		if( y >= 6.28f )
			y = 0.0f;

		D3DXMatrixTranslation(&T, -1.6f, 0.0f, 0.0f);
		T = T * yRot;

		Device->SetTransform(D3DTS_WORLD, &T);

		//
		// Render
		//

		Device->Clear(0, 0, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0x00000000, 1.0f, 0);
		Device->BeginScene();

		Device->SetMaterial(&d3d::WHITE_MTRL);
		Text->DrawSubset(0);

		Device->EndScene();
		Device->Present(0, 0, 0, 0);
	}
	return true;
}

//
// WndProc
//
LRESULT CALLBACK d3d::WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch( msg )
	{
	case WM_DESTROY:
		::PostQuitMessage(0);
		break;
		
	case WM_KEYDOWN:
		if( wParam == VK_ESCAPE )
			::DestroyWindow(hwnd);
		break;
	}
	return ::DefWindowProc(hwnd, msg, wParam, lParam);
}

//
// WinMain
//
int WINAPI WinMain(HINSTANCE hinstance,
				   HINSTANCE prevInstance, 
				   PSTR cmdLine,
				   int showCmd)
{
	if(!d3d::InitD3D(hinstance,
		Width, Height, true, D3DDEVTYPE_HAL, &Device))
	{
		::MessageBox(0, "InitD3D() - FAILED", 0, 0);
		return 0;
	}
		
	if(!Setup())
	{
		::MessageBox(0, "Setup() - FAILED", 0, 0);
		return 0;
	}

	d3d::EnterMsgLoop( Display );

	Cleanup();

	Device->Release();

	return 0;
}