//=============================================================================
// Desc: 坐标变换
//=============================================================================
#include <d3dx9.h> //D3DX实用库函数, 该头文件中又包含了d3d9.h头文件
//-----------------------------------------------------------------------------
// Desc: 全局变量
//-----------------------------------------------------------------------------
LPDIRECT3D9 g_pD3D = NULL; //Direct3D对象
LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; //Direct3D设备对象
LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; //顶点缓冲区对象
HWND g_Wnd = NULL; //窗口句柄
D3DRECT g_ClentRect;
//-----------------------------------------------------------------------------
// Desc: 顶点结构
//-----------------------------------------------------------------------------
struct CUSTOMVERTEX
{
D3DXVECTOR3 position;
DWORD color;
};
#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE)
void RenderTree(int i,int n,float L,D3DXMATRIXA16 * matWorld);
//-----------------------------------------------------------------------------
// Desc: 设置世界矩阵
//-----------------------------------------------------------------------------
VOID SetupWorldMatrice()
{
//建立一个绕X轴动态旋转的世界矩阵
D3DXMATRIX matWorld;
UINT iTime = timeGetTime() % 1000;
FLOAT fAngle = iTime * (2.0f * D3DX_PI) / 1000.0f;
D3DXMatrixIdentity( &matWorld );
D3DXMatrixRotationX( &matWorld, fAngle );
//设置世界矩阵
g_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld );
}
//-----------------------------------------------------------------------------
// Desc: 设置观察矩阵和投影矩阵
//-----------------------------------------------------------------------------
VOID SetupViewandProjMatrices()
{
//建立并设置观察矩阵
D3DXVECTOR3 vEyePt( 0.0f, 4.0f,20.0f );
D3DXVECTOR3 vLookatPt( 0.0f, 4.0f, 0.0f );
D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f );
D3DXMATRIX matView;
D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );
g_pd3dDevice->SetTransform( D3DTS_VIEW, &matView );
//建立并设置投影矩阵
D3DXMATRIX matProj;
D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, 1.0f, 1.0f, 50.0f );
g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj );
}
//-----------------------------------------------------------------------------
// Desc: 设置视区
//-----------------------------------------------------------------------------
VOID SetupViewPort()
{
RECT rect;
GetClientRect(g_Wnd,&rect);
D3DVIEWPORT9 vp;
vp.X = 0;
vp.Y = 0;
vp.Width = rect.right;
vp.Height = rect.bottom;
vp.MinZ = 0.0f;
vp.MaxZ = 1.0f;
g_pd3dDevice->SetViewport(&vp);
}
//-----------------------------------------------------------------------------
// Desc: 初始化Direct3D
//-----------------------------------------------------------------------------
HRESULT InitD3D( HWND hWnd )
{
//创建Direct3D对象, 该对象用于创建Direct3D设备对象
if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )
return E_FAIL;
//设置D3DPRESENT_PARAMETERS结构, 准备创建Direct3D设备对象
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory(&d3dpp,sizeof(d3dpp));
d3dpp.Windowed = true;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
d3dpp.EnableAutoDepthStencil = true;
d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
//创建Direct3D设备对象
if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp, &g_pd3dDevice ) ) )
{
return E_FAIL;
}
//设置剔出模式为不剔出任何面(正面和反面)
g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
//关闭光照处理, 默认情况下启用光照处理
g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE );
//设置观察和投影矩阵
SetupViewandProjMatrices();
//设置视区
SetupViewPort();
return S_OK;
}
//-----------------------------------------------------------------------------
// Desc: 创建场景图形
//-----------------------------------------------------------------------------
HRESULT InitGeometry()
{
//创顶点缓冲区
if( FAILED( g_pd3dDevice->CreateVertexBuffer( 50*2*sizeof(CUSTOMVERTEX),
0, D3DFVF_CUSTOMVERTEX,
D3DPOOL_DEFAULT, &g_pVB, NULL ) ) )
{
return E_FAIL;
}
//填充顶点缓冲区
CUSTOMVERTEX* pVertices;
if( FAILED( g_pVB->Lock( 0, 0, (void**)&pVertices, 0 ) ) )
return E_FAIL;
pVertices[0].position = D3DXVECTOR3(0,0,0);
pVertices[0].color = 0x00000000;
pVertices[1].position = D3DXVECTOR3(0,8,0);
pVertices[1].color = 0x00000000;
g_pVB->Unlock();
return S_OK;
}
//-----------------------------------------------------------------------------
// Desc: 释放创建的对象
//-----------------------------------------------------------------------------
VOID Cleanup()
{
//释放顶点缓冲区对象
if( g_pVB != NULL )
g_pVB->Release();
//释放Direct3D设备对象
if( g_pd3dDevice != NULL )
g_pd3dDevice->Release();
//释放Direct3D对象
if( g_pD3D != NULL )
g_pD3D->Release();
}
//-----------------------------------------------------------------------------
// Desc: 渲染图形
//-----------------------------------------------------------------------------
VOID Render()
{
//清空后台缓冲区
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255, 255, 255), 1.0f, 0 );
//开始在后台缓冲区绘制图形
if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
{
D3DXMATRIXA16 matWorld;
D3DXMatrixIdentity(&matWorld);
g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorld);
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_LINELIST,0,1);
D3DXMatrixIdentity(&matWorld);
RenderTree(4,1,8,&matWorld);
g_pd3dDevice->EndScene();
}
//将在后台缓冲区绘制的图形提交到前台缓冲区显示
g_pd3dDevice->Present( NULL, NULL, NULL, NULL );
}
//-----------------------------------------------------------------------------
// Desc: 消息处理
//-----------------------------------------------------------------------------
LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
switch( msg )
{
case WM_DESTROY:
Cleanup();
PostQuitMessage( 0 );
return 0;
}
return DefWindowProc( hWnd, msg, wParam, lParam );
}
//-----------------------------------------------------------------------------
// Desc: 入口函数
//-----------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
//注册窗口类
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC , MsgProc, 0L, 0L,
GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
L"ClassName", NULL };
RegisterClassEx( &wc );
//创建窗口
HWND hWnd = CreateWindow( L"ClassName", L"坐标变换",
WS_OVERLAPPEDWINDOW, 200, 100, 500,500,
GetDesktopWindow(), NULL, wc.hInstance, NULL );
g_Wnd=hWnd;
//初始化Direct3D
if( SUCCEEDED( InitD3D( hWnd ) ) )
{
//创建场景图形
if( SUCCEEDED( InitGeometry() ) )
{
//显示窗口
ShowWindow( hWnd, SW_SHOWDEFAULT );
UpdateWindow( hWnd );
//进入消息循环
MSG msg;
ZeroMemory( &msg, sizeof(msg) );
while( msg.message!=WM_QUIT )
{
if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else
{
Render(); //渲染图形
}
}
}
}
UnregisterClass( L"ClassName", wc.hInstance );
return 0;
}
//第一个参数为迭代次数，第二个参数为当前迭代次数，第三个参数为树干初始长度，第四个参数为迭代的初始世界矩阵
void RenderTree(int i,int n,float L,D3DXMATRIXA16 * matWorld)
{
while(i<=0)
return ;
//-----------------------------------
// 第一个树干迭代
//-----------------------------------
::D3DXMATRIXA16 MAT1,MAT2,MAT3,matWorld1,matWorldA;
::D3DXMatrixIdentity(&MAT1);
::D3DXMatrixIdentity(&MAT2);
::D3DXMatrixIdentity(&MAT3);
::D3DXMatrixIdentity(&matWorld1);
::D3DXMatrixIdentity(&matWorldA);
::D3DXMatrixMultiply(&matWorld1,&MAT1,matWorld);
::D3DXMatrixScaling(&MAT1,1.0/2,1.0/2,1.0/2);
::D3DXMatrixRotationZ(&MAT2,3.14/(4*n));
::D3DXMatrixTranslation(&MAT3,0,pow(2.0,n-1)*L*2.0/3,0);
::D3DXMatrixMultiply(&matWorld1,&MAT1,&MAT2);
::D3DXMatrixMultiply(&matWorld1,&matWorld1,&MAT3);
::D3DXMatrixMultiply(&matWorldA,&matWorld1,matWorld);
g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorldA);
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_LINELIST,0,1);
RenderTree(i-1,n+1,L/2,&matWorldA);
//-----------------------------------
// 第二个树干迭代
//-----------------------------------
::D3DXMatrixIdentity(&matWorldA);
::D3DXMatrixScaling(&MAT1,1.0/2,1.0/2,1.0/2);
::D3DXMatrixRotationZ(&MAT2,3.14/(4*n));
::D3DXMatrixTranslation(&MAT3,0,1*L*1.0/3,0);
::D3DXMatrixMultiply(&matWorld1,&MAT1,&MAT2);
::D3DXMatrixMultiply(&matWorld1,&matWorld1,&MAT3);
::D3DXMatrixMultiply(&matWorldA,&matWorld1,matWorld);
g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorldA);
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_LINELIST,0,1);
RenderTree(i-1,n+1,L/2,&matWorldA);
//-----------------------------------
// 第三个树干迭代
//-----------------------------------
::D3DXMatrixIdentity(&matWorldA);
::D3DXMatrixScaling(&MAT1,1.0/2,1.0/2,1.0/2);
::D3DXMatrixRotationZ(&MAT2,-3.14/(4*n));
::D3DXMatrixTranslation(&MAT3,0,pow(2.0,n-1)*L*2.0/3,0);
::D3DXMatrixMultiply(&matWorld1,&MAT1,&MAT2);
::D3DXMatrixMultiply(&matWorld1,&matWorld1,&MAT3);
::D3DXMatrixMultiply(&matWorldA,&matWorld1,matWorld);
g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorldA);
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_LINELIST,0,1);
RenderTree(i-1,n+1,L/2,&matWorldA);
//-----------------------------------
// 第四个树干迭代
//-----------------------------------
::D3DXMatrixIdentity(&matWorldA);
::D3DXMatrixScaling(&MAT1,1.0/2,1.0/2,1.0/2);
::D3DXMatrixRotationZ(&MAT2,-3.14/(4*n));
::D3DXMatrixTranslation(&MAT3,0,1*L*1.0/3,0);
::D3DXMatrixMultiply(&matWorld1,&MAT1,&MAT2);
::D3DXMatrixMultiply(&matWorld1,&matWorld1,&MAT3);
::D3DXMatrixMultiply(&matWorldA,&matWorld1,matWorld);
g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorldA);
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_LINELIST,0,1);
RenderTree(i-1,n+1,L/2,&matWorldA);
//-----------------------------------
// 第五个树干迭代
//-----------------------------------
::D3DXMatrixMultiply(&matWorld1,&MAT1,matWorld);
::D3DXMatrixScaling(&MAT1,1.0/2,1.0/2,1.0/2);
::D3DXMatrixRotationX(&MAT2,3.14/(4*n));
::D3DXMatrixTranslation(&MAT3,0,pow(2.0,n-1)*L*2.0/3,0);
::D3DXMatrixMultiply(&matWorld1,&MAT1,&MAT2);
::D3DXMatrixMultiply(&matWorld1,&matWorld1,&MAT3);
::D3DXMatrixMultiply(&matWorldA,&matWorld1,matWorld);
g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorldA);
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_LINELIST,0,1);
RenderTree(i-1,n+1,L/2,&matWorldA);
//-----------------------------------
//第六个树干迭代
//-----------------------------------
::D3DXMatrixIdentity(&matWorldA);
::D3DXMatrixScaling(&MAT1,1.0/2,1.0/2,1.0/2);
::D3DXMatrixRotationX(&MAT2,3.14/(4*n));
::D3DXMatrixTranslation(&MAT3,0,1*L*1.0/3,0);
::D3DXMatrixMultiply(&matWorld1,&MAT1,&MAT2);
::D3DXMatrixMultiply(&matWorld1,&matWorld1,&MAT3);
::D3DXMatrixMultiply(&matWorldA,&matWorld1,matWorld);
g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorldA);
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_LINELIST,0,1);
RenderTree(i-1,n+1,L/2,&matWorldA);
//-----------------------------------
//第七个树干迭代
//-----------------------------------
::D3DXMatrixIdentity(&matWorldA);
::D3DXMatrixScaling(&MAT1,1.0/2,1.0/2,1.0/2);
::D3DXMatrixRotationX(&MAT2,-3.14/(4*n));
::D3DXMatrixTranslation(&MAT3,0,pow(2.0,n-1)*L*2.0/3,0);
::D3DXMatrixMultiply(&matWorld1,&MAT1,&MAT2);
::D3DXMatrixMultiply(&matWorld1,&matWorld1,&MAT3);
::D3DXMatrixMultiply(&matWorldA,&matWorld1,matWorld);
g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorldA);
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_LINELIST,0,1);
RenderTree(i-1,n+1,L/2,&matWorldA);
//-----------------------------------
//第八个树干迭代
//-----------------------------------
::D3DXMatrixIdentity(&matWorldA);
::D3DXMatrixScaling(&MAT1,1.0/2,1.0/2,1.0/2);
::D3DXMatrixRotationX(&MAT2,-3.14/(4*n));
::D3DXMatrixTranslation(&MAT3,0,1*L*1.0/3,0);
g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorldA);
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_LINELIST,0,1);
RenderTree(i-1,n+1,L/2,&matWorldA);
}