[D3D_XD项目]D3DCamera类

//-----------------------------------------------------------------------------// 文件: D3DCamera.h//// 描述: D3DCamera类的头文件，定义变量，函数。//// 更新: 2009-03-19 by Ninsun //-----------------------------------------------------------------------------#pragma once#include <d3dx9.h>#pragma comment (lib, "d3d9.lib")#pragma comment (lib, "d3dx9.lib")#include "D3DWindow.h"class D3DCamera{public:D3DCamera(LPDIRECT3DDEVICE9 _pd3dDevice);public:~D3DCamera(void);public:VOID resetCamera();VOID applyCamera();LRESULT mouseProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam );VOID keyProc();private:VOID setCamera();public:private:LPDIRECT3DDEVICE9m_pd3dDevice;// D3D设备BOOLm_bIsRotaion;// 是否旋转D3DXVECTOR3m_vPos;// 摄像机位置D3DXVECTOR3m_vLookAt;// 摄像机视点D3DXVECTOR3m_vUp;// 摄像机顶方向D3DXVECTOR3m_vRight;// 摄像机右方向D3DXVECTOR3m_vDirection;// 摄像机面向方向FLOATm_fNear;// 视角最近距离FLOATm_fFar;// 视角最远距离FLOATm_fFOV;// 视角可视角度FLOATm_fAspect;// 视角宽高比FLOATm_fMaxPitch;// 视角仰视最大值FLOATm_fMinPitch;// 视角俯视最大值FLOATm_fCameraYawAngle;// 摄像机Y轴旋转角度FLOATm_fCameraPitchAngle;// 摄像机X轴旋转角度D3DXVECTOR3m_vDelta;// 摄像机移动向量FLOATm_fSpeed;// 摄像机移动速度POINTm_LastPoint;// 上一个鼠标位置}; 
//-----------------------------------------------------------------------------// 文件: D3DCamera.cpp//// 描述: D3DCamera类,用于架设一个可以操纵的摄像机//// 更新: 2009-03-19 by Ninsun //-----------------------------------------------------------------------------#include "D3DCamera.h"#include "D3DImage.h"//-----------------------------------------------------------------------------// 名称: D3DCamera()// 描述: 自定义构造函数//-----------------------------------------------------------------------------D3DCamera::D3DCamera(LPDIRECT3DDEVICE9 _pd3dDevice){m_pd3dDevice = _pd3dDevice;// 设置摄像机位置，视点，顶方向D3DXMATRIXA16 matView;m_vPos = D3DXVECTOR3(0.0f, 0.0f, -WND_HEIGHT/2*ZOOM);// 摄像机位置m_vLookAt = D3DXVECTOR3(0.0f, 0.0f, 0.0f);// 摄像机视点m_vUp = D3DXVECTOR3(0.0f, 1.0f, 0.0f);// 摄像机顶方向D3DXMatrixLookAtLH( &matView, &m_vPos, &m_vLookAt, &m_vUp );m_pd3dDevice->SetTransform( D3DTS_VIEW, &matView );// 使用透视投影矩阵，设置摄像机视角，D3DXMATRIXA16 matProj;D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI / 4, 4.0f/3.0f, 0.0001f, 2000.0f );m_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj );// 设置其他变量m_vDirection = m_vLookAt - m_vPos;D3DXVec3Cross( &m_vRight, &m_vUp, &m_vDirection );m_fCameraYawAngle = D3DX_PI;m_fCameraPitchAngle = 0;m_fSpeed = ZOOM*0.5;m_bIsRotaion = FALSE;}D3DCamera::~D3DCamera(void){}//-----------------------------------------------------------------------------// 名称: setCamera()// 描述: 设置摄像机位置，看点//-----------------------------------------------------------------------------VOID D3DCamera::setCamera(){D3DXMATRIXA16 matView;D3DXMatrixLookAtLH( &matView, &m_vPos, &m_vLookAt, &m_vUp );m_pd3dDevice->SetTransform( D3DTS_VIEW, &matView );}//-----------------------------------------------------------------------------// 名称: resetCamera()// 描述: 设置摄像机位置，看点//-----------------------------------------------------------------------------VOID D3DCamera::resetCamera(){m_vPos = D3DXVECTOR3(0.0f, 0.0f, -WND_HEIGHT/2*ZOOM);// 摄像机位置m_vLookAt = D3DXVECTOR3(0.0f, 0.0f, 0.0f);// 摄像机视点m_vUp = D3DXVECTOR3(0.0f, 1.0f, 0.0f);// 摄像机顶方向m_vDirection = m_vLookAt - m_vPos;D3DXVec3Cross( &m_vRight, &m_vUp, &m_vDirection );m_fCameraYawAngle = D3DX_PI;m_fCameraPitchAngle = 0;setCamera();}//-----------------------------------------------------------------------------// 名称: applyCamera()// 描述: 应用摄像机变换//-----------------------------------------------------------------------------VOID D3DCamera::applyCamera(){POINT ptCurrentPos;POINT ptDeltaPos;if(m_bIsRotaion){// 计算鼠标偏移GetCursorPos(&ptCurrentPos);ptDeltaPos.x = ptCurrentPos.x - m_LastPoint.x;ptDeltaPos.y = ptCurrentPos.y - m_LastPoint.y;SetCursorPos(m_LastPoint.x,m_LastPoint.y);//m_LastPoint = ptCurrentPos;float fYaw = ptDeltaPos.x*0.0025f;float fPitch = ptDeltaPos.y*0.0025f;// 根据鼠标偏移计算欧拉角m_fCameraYawAngle += fYaw;m_fCameraPitchAngle -= fPitch;// 限定俯仰角大小if(m_fCameraPitchAngle > D3DX_PI*0.49f)m_fCameraPitchAngle = D3DX_PI*0.49f;else if(m_fCameraPitchAngle < -D3DX_PI*0.49f)m_fCameraPitchAngle = -D3DX_PI*0.49f;}// 根据欧拉角Yaw，Pitch计算摄像机的旋转矩阵D3DXMATRIX matCameraRotation;ZeroMemory(&matCameraRotation, sizeof(D3DXMATRIX));D3DXMatrixRotationYawPitchRoll(&matCameraRotation, m_fCameraYawAngle, m_fCameraPitchAngle,0.0f);// 根据旋转矩阵将摄像机的朝向和顶方向变换D3DXVECTOR3 vWorldUp, vWorldAhead;D3DXVECTOR3 vLocalUp = D3DXVECTOR3(0,1,0);D3DXVECTOR3 vLocalAhead = D3DXVECTOR3(0,0,-WND_HEIGHT/2*ZOOM);D3DXVec3TransformCoord( &vWorldUp, &vLocalUp, &matCameraRotation );D3DXVec3TransformCoord( &vWorldAhead, &vLocalAhead, &matCameraRotation );// 将局部偏移量转到全局坐标D3DXVECTOR3 vWorldDelta;D3DXVec3TransformCoord( &vWorldDelta, &m_vDelta, &matCameraRotation );// 根据偏移量计算视点位置m_vPos += vWorldDelta;if(m_vPos.y < 0)m_vPos.y = 0;if(m_vPos.y > ZOOM*200)m_vPos.y = ZOOM*200;m_vLookAt = m_vPos + vWorldAhead;// 设置摄像机setCamera();// 更新变量m_vDirection = m_vLookAt - m_vPos;m_vUp = vWorldUp;D3DXVec3Cross( &m_vRight, &m_vUp, &m_vDirection );}//-----------------------------------------------------------------------------// 名称: mouseProc()// 描述: 鼠标消息处理//-----------------------------------------------------------------------------LRESULT D3DCamera::mouseProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ){switch( msg ){case WM_RBUTTONDOWN:{m_bIsRotaion = true;SetCapture(hWnd);GetCursorPos(&m_LastPoint);}break;case WM_RBUTTONUP:{m_bIsRotaion = false;ReleaseCapture();}break;}return 0;}//-----------------------------------------------------------------------------// 名称: keyProc()// 描述: 键盘消息处理//-----------------------------------------------------------------------------VOID D3DCamera::keyProc(){static char _up = VK_SPACE;static char _down = 'X';static char _left = 'A';static char _right = 'D';static char _head = 'W';static char _back = 'S';static char _reset = 'R';m_vDelta = D3DXVECTOR3(0, 0, 0);if( GetKeyState(_head) & 0x80 ){m_vDelta.z -= m_fSpeed;}if( GetKeyState(_back) & 0x80 ){m_vDelta.z += m_fSpeed;}if( GetKeyState(_left) & 0x80 ){m_vDelta.x += m_fSpeed;}if( GetKeyState(_right) & 0x80 ){m_vDelta.x -= m_fSpeed;}if( GetKeyState(_up) & 0x80 ){m_vPos.y += m_fSpeed;}if( GetKeyState(_down) & 0x80 ){m_vPos.y -= m_fSpeed;}if( GetKeyState(_reset) & 0x80 ){resetCamera();}}