//=============================================================================
// Desc: 多光源示例程序
//=============================================================================
#include <d3dx9.h>
//-----------------------------------------------------------------------------
// Desc: 全局變量
//-----------------------------------------------------------------------------
LPDIRECT3D9 g_pD3D = NULL; //Direct3D對象
LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; //Direct3D設備對象
LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; //頂點緩沖區對象
//-----------------------------------------------------------------------------
// Desc: 頂點結構
//-----------------------------------------------------------------------------
struct CUSTOMVERTEX
{
D3DXVECTOR3 position; //頂點位置
D3DXVECTOR3 normal; //頂點法線
};
#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_NORMAL)
//-----------------------------------------------------------------------------
// Desc: 設置變換矩陣
//-----------------------------------------------------------------------------
VOID SetMatrices()
{
//建立并設置世界矩陣
D3DXMATRIX matWorld;
D3DXMatrixIdentity( &matWorld );
g_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld );
//建立并設置觀察矩陣
D3DXVECTOR3 vEyePt( 0.0f, 3.0f,-5.0f );
D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f );
D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f );
D3DXMATRIX matView;
D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );
g_pd3dDevice->SetTransform( D3DTS_VIEW, &matView );
//建立并設置投影矩陣
D3DXMATRIX matProj;
D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, 1.0f, 1.0f, 100.0f );
g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj );
}
//-----------------------------------------------------------------------------
// Desc: 初始化Direct3D
//-----------------------------------------------------------------------------
HRESULT InitD3D( HWND hWnd )
{
//創建Direct3D對象, 該對象用于創建Direct3D設備對象
if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )
return E_FAIL;
//設置D3DPRESENT_PARAMETERS結構, 準備創建Direct3D設備對象
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;
//創建Direct3D設備對象
if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp, &g_pd3dDevice ) ) )
{
return E_FAIL;
}
//設置剔出模式為不剔出任何面(正面和方面)
g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
//啟用深度測試
g_pd3dDevice->SetRenderState( D3DRS_ZENABLE, TRUE );
//啟用鏡面反射光照模型
g_pd3dDevice->SetRenderState(D3DRS_SPECULARENABLE, TRUE);
//設置變換矩陣
SetMatrices();
return S_OK;
}
//-----------------------------------------------------------------------------
// Desc: 創建場景圖形
//-----------------------------------------------------------------------------
HRESULT InitGeometry()
{
//創頂點緩沖區
if( FAILED( g_pd3dDevice->CreateVertexBuffer( 50*2*sizeof(CUSTOMVERTEX),
0, D3DFVF_CUSTOMVERTEX,
D3DPOOL_DEFAULT, &g_pVB, NULL ) ) )
{
return E_FAIL;
}
//填充頂點緩沖區
CUSTOMVERTEX* pVertices;
if( FAILED( g_pVB->Lock( 0, 0, (void**)&pVertices, 0 ) ) )
return E_FAIL;
for( DWORD i=0; i<50; i++ )
{
FLOAT theta = (2*D3DX_PI*i)/(50-1);
pVertices[2*i+0].position = D3DXVECTOR3( sinf(theta),-1.0f, cosf(theta) );
pVertices[2*i+0].normal = D3DXVECTOR3( sinf(theta), 0.0f, cosf(theta) );
pVertices[2*i+1].position = D3DXVECTOR3( sinf(theta), 1.0f, cosf(theta) );
pVertices[2*i+1].normal = D3DXVECTOR3( sinf(theta), 0.0f, cosf(theta) );
}
g_pVB->Unlock();
return S_OK;
}
//-----------------------------------------------------------------------------
// Desc: 設置材質和燈光
//-----------------------------------------------------------------------------
VOID SetupLights()
{
//設置材料屬性, 只反射紅光分量和綠光分量, 整體上看該物體材料反射黃色光
D3DMATERIAL9 mtrl;
ZeroMemory( &mtrl, sizeof(D3DMATERIAL9) );
mtrl.Ambient.r = 1.0f;
mtrl.Ambient.g = 1.0f;
mtrl.Ambient.b = 0.0f;
mtrl.Ambient.a = 1.0f;
mtrl.Diffuse.r = 1.0f;
mtrl.Diffuse.g = 1.0f;
mtrl.Diffuse.b = 0.0f;
mtrl.Diffuse.a = 0.5f;
mtrl.Specular.r = 1.0f;
mtrl.Specular.g = 1.0f;
mtrl.Specular.b = 0.0f;
mtrl.Specular.a = 1.0f;
g_pd3dDevice->SetMaterial( &mtrl );
//設置一號光源為方向光，顏色為綠色
D3DXVECTOR3 vecDir;
D3DLIGHT9 light1;
ZeroMemory( &light1, sizeof(D3DLIGHT9) );
light1.Type = D3DLIGHT_DIRECTIONAL;
light1.Diffuse.r = 0.0f;
light1.Diffuse.g = 1.0f;
light1.Diffuse.b = 0.0f;
vecDir = D3DXVECTOR3(-10, 0 ,10); //方向光方向
D3DXVec3Normalize( (D3DXVECTOR3*)&light1.Direction, &vecDir );
g_pd3dDevice->SetLight( 0, &light1 );
//二號光源為點光源，顏色為紅色
D3DXVECTOR3 vecPos2;
D3DLIGHT9 light2;
ZeroMemory( &light2, sizeof(D3DLIGHT9) );
light2.Type = D3DLIGHT_POINT;
light2.Diffuse.r = 1.0f;
light2.Diffuse.g = 0.0f;
light2.Diffuse.b = 0.0f;
light2.Position= D3DXVECTOR3(10*sinf(timeGetTime()/350.0f) ,
0,
10*cosf(timeGetTime()/350.0f) );
light2.Range = 100.0f;
light2.Attenuation0 = 1.0f;
g_pd3dDevice->SetLight( 1, &light2 );
//三號光源為方向光,顏色為綠色, *鏡面反射*
D3DXVECTOR3 vecDir3;
D3DLIGHT9 light3;
ZeroMemory( &light3, sizeof(D3DLIGHT9) );
light3.Type = D3DLIGHT_DIRECTIONAL;
light3.Specular.r = 0.0f;
light3.Specular.g = 1.0f;
light3.Specular.b = 0.0f;
light3.Specular.a = 1.0f;
vecDir3 = D3DXVECTOR3(-10,0,10);
D3DXVec3Normalize( (D3DXVECTOR3*)&light3.Direction, &vecDir3 );
g_pd3dDevice->SetLight( 2, &light3 );
//設置一定的環境光
g_pd3dDevice->SetRenderState( D3DRS_AMBIENT, 0x00505050);
}
//--------------------------------------------------------------
// Name: 釋放創建的對象
//--------------------------------------------------------------
VOID Cleanup()
{
//釋放頂點緩沖區對象
if( g_pVB != NULL )
g_pVB->Release();
//釋放Direct3D設備對象
if( g_pd3dDevice != NULL )
g_pd3dDevice->Release();
//釋放Direct3D對象
if( g_pD3D != NULL )
g_pD3D->Release();
}
//-----------------------------------------------------------------------------
// Desc: 渲染圖形
//-----------------------------------------------------------------------------
VOID Render()
{
//清空后臺緩沖區和深度緩沖區
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER,
D3DCOLOR_XRGB(45, 50, 170), 1.0f, 0 );
//開始在后臺緩沖區繪制圖形
if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
{
//設置材料和燈光, 因為燈光屬性不斷變化,所以在此設置
SetupLights();
//在后臺緩沖區繪制圖形
g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof(CUSTOMVERTEX) );
g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );
g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 2*50-2 );
//結束在后臺緩沖區繪制圖形
g_pd3dDevice->EndScene();
}
//將在后臺緩沖區繪制的圖形提交到前臺緩沖區顯示
g_pd3dDevice->Present( NULL, NULL, NULL, NULL );
}
//-----------------------------------------------------------------------------
// Desc: 消息處理
//-----------------------------------------------------------------------------
LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
switch( msg )
{
case WM_DESTROY:
Cleanup();
PostQuitMessage( 0 );
return 0;
case WM_KEYDOWN:
switch(wParam)
{
case 48: //"0"鍵, 禁用所有的光源,只使用環境光
g_pd3dDevice->LightEnable( 0, false );
g_pd3dDevice->LightEnable( 1, false );
g_pd3dDevice->LightEnable( 2, false );
break;
case 49: //"1"鍵, 啟用1號光源, 方向光
g_pd3dDevice->LightEnable( 0, true );
g_pd3dDevice->LightEnable( 1, false );
g_pd3dDevice->LightEnable( 2, false );
break;
case 50: //"2"鍵, 啟用2號光源, 點光源
g_pd3dDevice->LightEnable( 0, false );
g_pd3dDevice->LightEnable( 1, true );
g_pd3dDevice->LightEnable( 2, false );
break;
case 51: //"3"鍵, 啟用3號光源, 方向光
g_pd3dDevice->LightEnable( 0, false );
g_pd3dDevice->LightEnable( 1, false );
g_pd3dDevice->LightEnable( 2, true );
break;
case 52: //"4"鍵, 同時啟用三個光源
g_pd3dDevice->LightEnable( 0, true );
g_pd3dDevice->LightEnable( 1, true );
g_pd3dDevice->LightEnable( 2, true );
break;
case 53: //"5"鍵,平面著色模式
g_pd3dDevice->SetRenderState(D3DRS_SHADEMODE,D3DSHADE_FLAT);
break;
case 54: //"6"鍵，戈勞德著色模式
g_pd3dDevice->SetRenderState(D3DRS_SHADEMODE,D3DSHADE_GOURAUD);
break;
}
return 0;
}
return DefWindowProc( hWnd, msg, wParam, lParam );
}
//-----------------------------------------------------------------------------
// Desc: 入口函數
//-----------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
//注冊窗口類
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L,
GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
L"ClassName", NULL };
RegisterClassEx( &wc );
//創建窗口
HWND hWnd = CreateWindow( L"ClassName", L"多光源",
WS_OVERLAPPEDWINDOW, 200, 100, 500, 500,
GetDesktopWindow(), NULL, wc.hInstance, NULL );
//初始化Direct3D
if( SUCCEEDED( InitD3D( hWnd ) ) )
{
//創建場景圖形
if( SUCCEEDED( InitGeometry() ) )
{
//顯示窗口
ShowWindow( hWnd, SW_SHOWDEFAULT );
UpdateWindow( hWnd );
//進入消息循環
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(); //渲染場景
}
}
}
}
UnregisterClass( L"ClassName", wc.hInstance );
return 0;
}
posted on 2008-03-24 23:00
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