DIRECT3D 灯光简例

//============================================================================= // Desc: 简单灯光范例程序 // 使用VC6.0,需要工具->选项->目录添加include和lib //C:\PROGRAM FILES\MICROSOFT DIRECTX SDK (AUGUST 2008)\INCLUDE //C:\PROGRAM FILES\MICROSOFT DIRECTX SDK (AUGUST 2008)\LIB\X86 //============================================================================= #include <d3d9.h> #include <d3dx9.h> #include <D3dx9math.h> #include <Windows.h> #pragma comment(lib, "d3d9.lib") #pragma comment(lib, "d3dx9.lib") #pragma comment(lib, "Winmm.lib") //----------------------------------------------------------------------------- // 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 LPD3DXFONT g_pFont = 0; //字体对象 RECT rect; UINT Select_Light =1; //灯光选择,初始选择点光源 BOOL Select_RoAndMyMtrl[2]={FALSE,TRUE}; //旋转和材质使用开关 D3DLIGHT9 light; //灯光 D3DMATERIAL9 mtrl; //材质 D3DXMATRIX matWorld; //世界矩阵 D3DXMATRIX matView; //观察矩阵 BOOL MK[128]; //BOOL开关集合 //----------------------------------------------------------------------------- // Desc: 顶点结构 //----------------------------------------------------------------------------- struct CUSTOMVERTEX { D3DXVECTOR3 position; //顶点位置 D3DXVECTOR3 normal; //顶点法线 }; #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_NORMAL) // //----------------------------------------------------------------------------- // Desc: 设置变换矩阵 //----------------------------------------------------------------------------- VOID SetD3DView(D3DXMATRIX &matView) { //建立并设置观察矩阵 D3DXVECTOR3 vEyePt( 0.0f, 20.0f,-20.0f ); //摄像机的位置 D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f ); D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f ); ////////////// D3DXVECTOR3 CameraPosition=vEyePt; //摄像机的位置CameraPosition=vEyePt; D3DXVECTOR3 CameraZ=vLookatPt-vEyePt; //注意是左手系 D3DXVec3Normalize(&CameraZ, &CameraZ); //摄像机的Z方向CameraZ=vLookatPt-vEyePt; D3DXVECTOR3 CameraX; D3DXVec3Cross(&CameraX, &vUpVec, &CameraZ); //摄像机的X方向CameraX=cross(vUpVec,CameraZ); D3DXVec3Normalize(&CameraX, &CameraX); D3DXVECTOR3 CameraY; D3DXVec3Cross(&CameraY, &CameraZ, &CameraX); //摄像机的X方向CameraY=cross(CameraZ,CameraX); D3DXVec3Normalize(&CameraY, &CameraY); /////////////////////////////////////////////////// float posx = -D3DXVec3Dot(&CameraX, &CameraPosition); float posy = -D3DXVec3Dot(&CameraY, &CameraPosition); float posz = -D3DXVec3Dot(&CameraZ, &CameraPosition); matView = D3DXMATRIX( CameraX.x, CameraY.x, CameraZ.x, 0.0f, CameraX.y, CameraY.y, CameraZ.y, 0.0f, CameraX.z, CameraY.z, CameraZ.z, 0.0f, posx, posy, posz, 1.0f ); g_pd3dDevice->SetTransform( D3DTS_VIEW, &matView ); } ///////////////////////////////////// //实现观察矩阵的全方位移动:方法一 ////////////////////////////////////////////// VOID MoveMyMatrix(D3DXMATRIX &MyMatrix, BOOL MK[128], float RotaW=0.04, float moveV=0.08) { //创建并设置世界矩阵 float fRoll=0.0f; float fPitch=0.0f; float fYaw=0.0f; if(MK[0X57]) fPitch +=RotaW; //'W', 绕X轴旋转 fPitch if(MK[0X53]) fPitch -=RotaW; //'s', 绕X轴旋转 fPitch if(MK[0X41]) fRoll +=RotaW;//'A', 绕Z轴旋转 fRoll if(MK[0X44]) fRoll -=RotaW; //'D', 绕Z轴旋转 fRoll if(MK[0X51]) fYaw +=RotaW; //'Q', 绕Y轴旋转 fYaw if(MK[0X45]) fYaw -=RotaW; //'E', 绕Y轴旋转 fYaw /////////////// D3DXVECTOR3 MyMatrixX=D3DXVECTOR3(MyMatrix._11, MyMatrix._21, MyMatrix._31); D3DXVECTOR3 MyMatrixY=D3DXVECTOR3(MyMatrix._12, MyMatrix._22, MyMatrix._32); D3DXVECTOR3 MyMatrixZ=D3DXVECTOR3(MyMatrix._13, MyMatrix._23, MyMatrix._33); if(0.0f!=fYaw || 0.0f!=fRoll || 0.0f!=fPitch) { if(0.0f!=fYaw) { D3DXMATRIX matYaw; D3DXMatrixRotationAxis(&matYaw, &MyMatrixY, fYaw); D3DXVec3TransformCoord(&MyMatrixZ, &MyMatrixZ, &matYaw); D3DXVec3TransformCoord(&MyMatrixX, &MyMatrixX, &matYaw); } if(0.0f!=fRoll) { D3DXMATRIX matRoll; D3DXMatrixRotationAxis(&matRoll, &MyMatrixZ, fRoll); D3DXVec3TransformCoord(&MyMatrixX, &MyMatrixX, &matRoll); D3DXVec3TransformCoord(&MyMatrixY, &MyMatrixY, &matRoll); } if(0.0f!=fPitch) { D3DXMATRIX matPitch; D3DXMatrixRotationAxis(&matPitch, &MyMatrixX, fPitch); D3DXVec3TransformCoord(&MyMatrixY, &MyMatrixY, &matPitch); D3DXVec3TransformCoord(&MyMatrixZ, &MyMatrixZ, &matPitch); } D3DXVec3Normalize(&MyMatrixZ, &MyMatrixZ); //单位化Z向量 D3DXVec3Cross(&MyMatrixX, &MyMatrixY, &MyMatrixZ); D3DXVec3Normalize(&MyMatrixX, &MyMatrixX); //单位化X向量 D3DXVec3Cross(&MyMatrixY, &MyMatrixZ, &MyMatrixX); D3DXVec3Normalize(&MyMatrixY, &MyMatrixY); //单位化Y向量 MyMatrix._31=MyMatrixX.z; MyMatrix._32=MyMatrixY.z; MyMatrix._33=MyMatrixZ.z; MyMatrix._21=MyMatrixX.y; MyMatrix._22=MyMatrixY.y; MyMatrix._23=MyMatrixZ.y; MyMatrix._11=MyMatrixX.x; MyMatrix._12=MyMatrixY.x; MyMatrix._13=MyMatrixZ.x; } /////////// D3DXVECTOR3 MyMatrixPosition=D3DXVECTOR3(MyMatrix._41, MyMatrix._42, MyMatrix._43); BOOL IsPos=FALSE; if(MK[VK_PRIOR]) //'PageUp', MoveY { MyMatrixPosition +=moveV*MyMatrixY; IsPos=TRUE; } if(MK[VK_NEXT]) //'PageDown', MoveY { MyMatrixPosition -=moveV*MyMatrixY; IsPos=TRUE; } if(MK[VK_LEFT]) //'LEFT', MoveX { MyMatrixPosition +=moveV*MyMatrixX; IsPos=TRUE; } if(MK[VK_RIGHT]) //'RIGHT', MoveX { MyMatrixPosition -=moveV*MyMatrixX; IsPos=TRUE; } if(MK[VK_UP]) //'UP', MoveZ { MyMatrixPosition +=moveV*MyMatrixZ; IsPos=TRUE; } if(MK[VK_DOWN]) //'DOWN', MoveZ { MyMatrixPosition -=moveV*MyMatrixZ; IsPos=TRUE; } if(TRUE==IsPos) { MyMatrix._41=MyMatrixPosition.x; MyMatrix._42=MyMatrixPosition.y; MyMatrix._43=MyMatrixPosition.z; } } ///////////////////////////////////// //实现观察矩阵的全方位移动:方法二 ////////////////////////////////////////////// VOID MoveMyMatrix(D3DXMATRIX &MyMatrix, float RotaW=0.04, float moveV=0.08) { //创建并设置世界矩阵 float fRoll=0.0f; float fPitch=0.0f; float fYaw=0.0f; if(GetAsyncKeyState(0X57) & 0x8000f) //'W', 绕X轴旋转 fPitch { fPitch +=RotaW; } if(GetAsyncKeyState(0X53) & 0x8000f) //'s', 绕X轴旋转 fPitch { fPitch -=RotaW; } if(GetAsyncKeyState(0X41) & 0x8000f) //'A', 绕Z轴旋转 fRoll { fRoll +=RotaW; } if(GetAsyncKeyState(0X44) & 0x8000f) //'D', 绕Z轴旋转 fRoll { fRoll -=RotaW; } if(GetAsyncKeyState(0X51) & 0x8000f) //'Q', 绕Y轴旋转 fYaw { fYaw +=RotaW; } if(GetAsyncKeyState(0X45) & 0x8000f) //'E', 绕Y轴旋转 fYaw { fYaw -=RotaW; } /////////////////// D3DXVECTOR3 MyMatrixX=D3DXVECTOR3(MyMatrix._11, MyMatrix._21, MyMatrix._31); D3DXVECTOR3 MyMatrixY=D3DXVECTOR3(MyMatrix._12, MyMatrix._22, MyMatrix._32); D3DXVECTOR3 MyMatrixZ=D3DXVECTOR3(MyMatrix._13, MyMatrix._23, MyMatrix._33); if(0.0f!=fYaw || 0.0f!=fRoll || 0.0f!=fPitch) { if(0.0f!=fYaw) { D3DXMATRIX matYaw; D3DXMatrixRotationAxis(&matYaw, &MyMatrixY, fYaw); D3DXVec3TransformCoord(&MyMatrixZ, &MyMatrixZ, &matYaw); D3DXVec3TransformCoord(&MyMatrixX, &MyMatrixX, &matYaw); } if(0.0f!=fRoll) { D3DXMATRIX matRoll; D3DXMatrixRotationAxis(&matR