D3D 光照和材料 小例子

標籤：d3d   例子程式   

1.實現一個旋轉的圓柱體，體現d3d光照效果

2.程式實現

#pragma once#pragma comment(lib,"winmm.lib")#pragma comment(lib,"d3d9.lib")#pragma comment(lib,"d3dx9.lib")#include<d3d9.h>#include<d3dx9.h>//自訂頂點格式struct CUSTOMVERTEX{D3DXVECTOR3 postion;D3DXVECTOR3 normal;};//座標和法向量。#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_NORMAL)//函式宣告LRESULT CALLBACK MsgProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam);void Render();HRESULT InitD3D(HWND hWnd);HRESULT InitGeometry();void CleanUp();void SetupMatrices();void SetupLights();//全域變數LPDIRECT3D9 g_pd3d=NULL;LPDIRECT3DDEVICE9 g_pd3dDevice=NULL;LPDIRECT3DVERTEXBUFFER9 g_d3dVertexBuffer=NULL;//主函數入口。INT WINAPI wWinMain(HINSTANCE,HINSTANCE,LPWSTR,INT){//註冊視窗類別。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;RegisterClassEx(&wcex);//建立視窗。HWND hWnd=CreateWindowEx(WS_EX_OVERLAPPEDWINDOW,L"Self001",L"Self001 Window",WS_OVERLAPPEDWINDOW,100,100,300,300,NULL,NULL,wcex.hInstance,NULL);//顯示視窗。ShowWindow(hWnd,SW_SHOWDEFAULT);UpdateWindow(hWnd);//初始化d3d對象。if(SUCCEEDED(InitD3D(hWnd))){if(SUCCEEDED(InitGeometry())){//訊息迴圈。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();}}}}//登出視窗類別。UnregisterClass(L"Self001",wcex.hInstance);return 0;}//視窗回呼函數。LRESULT CALLBACK 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);}//渲染。void Render(){//清除目標。g_pd3dDevice->Clear(0,NULL,D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER,D3DCOLOR_XRGB(0,0,255),1.0f,0);if(SUCCEEDED(g_pd3dDevice->BeginScene())){SetupLights();SetupMatrices();g_pd3dDevice->SetStreamSource(0,g_d3dVertexBuffer,0,sizeof(CUSTOMVERTEX));g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);//繪製圖元g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP,0,2*50-2);g_pd3dDevice->EndScene();}g_pd3dDevice->Present(NULL,NULL,NULL,NULL);}//初始化d3d對象HRESULT InitD3D(HWND hWnd){//建立d3dg_pd3d=Direct3DCreate9(D3D_SDK_VERSION);if(g_pd3d == NULL){return E_FAIL;}//初始化d3d呈現參數。D3DPRESENT_PARAMETERS d3dpp;ZeroMemory(&d3dpp,sizeof(d3dpp));d3dpp.Windowed=TRUE;d3dpp.hDeviceWindow=hWnd;d3dpp.BackBufferFormat=D3DFMT_UNKNOWN;d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD;d3dpp.EnableAutoDepthStencil=TRUE;d3dpp.AutoDepthStencilFormat=D3DFMT_D16;//建立裝置。if(FAILED(g_pd3d->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hWnd,D3DCREATE_SOFTWARE_VERTEXPROCESSING,&d3dpp,&g_pd3dDevice))){return E_FAIL;}//設定背面剔除和z 緩衝g_pd3dDevice->SetRenderState(D3DRS_CULLMODE,D3DCULL_NONE);g_pd3dDevice->SetRenderState(D3DRS_ZENABLE,TRUE);return S_OK;}//清除d3d對象。void CleanUp(){//頂點緩衝。if(g_d3dVertexBuffer != NULL){g_d3dVertexBuffer->Release();}//裝置。if(g_pd3dDevice != NULL){g_pd3dDevice->Release();}//d3d。if(g_pd3d != NULL){g_pd3d->Release();}}//設定變換矩陣。void SetupMatrices(){//世界變換矩陣。D3DXMATRIXA16 matWorld;D3DXMatrixIdentity(&matWorld);D3DXMatrixRotationX(&matWorld,timeGetTime()/500.0f);g_pd3dDevice->SetTransform(D3DTS_WORLD,&matWorld);//視野變換矩陣。D3DXMATRIXA16 matView;D3DXVECTOR3 vEye(0.0f,3.0f,-5.0f);D3DXVECTOR3 vLookAt(0.0f,0.0f,0.0f);D3DXVECTOR3 vUp(0.0f,1.0f,0.0f);D3DXMatrixLookAtLH(&matView,&vEye,&vLookAt,&vUp);g_pd3dDevice->SetTransform(D3DTS_VIEW,&matView);//投影變換矩陣。D3DXMATRIXA16 matProj;D3DXMatrixPerspectiveFovLH(&matProj,D3DX_PI/4,1.0f,1.0f,100.0f);g_pd3dDevice->SetTransform(D3DTS_PROJECTION,&matProj);}//初始化幾何圖元。HRESULT InitGeometry(){//建立頂點緩衝。if(FAILED(g_pd3dDevice->CreateVertexBuffer(sizeof(CUSTOMVERTEX)*2*50,0,D3DFVF_CUSTOMVERTEX,D3DPOOL_DEFAULT,&g_d3dVertexBuffer,NULL))){return E_FAIL;}//座標設定。CUSTOMVERTEX* pVertices=NULL;if(FAILED(g_d3dVertexBuffer->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].postion=D3DXVECTOR3(cosf(theta),-1,sinf(theta));pVertices[2*i+0].normal=D3DXVECTOR3(cosf(theta),0,sinf(theta));pVertices[2*i+1].postion=D3DXVECTOR3(cosf(theta),1,sinf(theta));pVertices[2*i+1].normal=D3DXVECTOR3(cosf(theta),0,sinf(theta));}g_d3dVertexBuffer->Unlock();return S_OK;}//設定材料和光照。void SetupLights(){//材料D3DMATERIAL9 mtrl;ZeroMemory(&mtrl,sizeof(mtrl));mtrl.Ambient.r=mtrl.Diffuse.r=1.0f;mtrl.Ambient.g=mtrl.Diffuse.g=1.0f;mtrl.Ambient.b=mtrl.Diffuse.b=0.0f;mtrl.Ambient.a=mtrl.Diffuse.a=1.0f;g_pd3dDevice->SetMaterial(&mtrl);//光照D3DLIGHT9 light;ZeroMemory(&light,sizeof(light));light.Type=D3DLIGHT_DIRECTIONAL;light.Diffuse.r=1.0f;light.Diffuse.g=1.0f;light.Diffuse.b=1.0f;D3DXVECTOR3 normVec=D3DXVECTOR3(0.0f,0.0f,1.0f);D3DXVec3Normalize((D3DXVECTOR3*)&light.Direction,&normVec);light.Range=1000.0f;//環境g_pd3dDevice->SetLight(0,&light);g_pd3dDevice->LightEnable(0,TRUE);g_pd3dDevice->SetRenderState(D3DRS_LIGHTING,TRUE);g_pd3dDevice->SetRenderState(D3DRS_AMBIENT,D3DCOLOR_XRGB(10,0,0));}

3.程式運行結果

4.注意事項。

   理解材料是什麼東西，尤其材料的漫射光和環境光線。

   理解光照是什麼東西，尤其設定參數。

   練習多了，慢慢的就熟悉了。