DX .X文件网格渲染

////////////////////////////////////////////////////////////////////////////////////////////////// // // File: camera.cpp // // Author: Frank Luna (C) All Rights Reserved // // System: AMD Athlon 1800+ XP, 512 DDR, Geforce 3, Windows XP, MSVC++ 7.0 // // Desc: Defines a camera's position and orientation. // ////////////////////////////////////////////////////////////////////////////////////////////////// #include "CCamera.h" Camera::Camera() { _cameraType = AIRCRAFT; _pos = D3DXVECTOR3(0.0f, 0.0f, -3.0f); _right = D3DXVECTOR3(1.0f, 0.0f, 0.0f); _up = D3DXVECTOR3(0.0f, 1.0f, 0.0f); _look = D3DXVECTOR3(0.0f, 0.0f, 1.0f); SetCursorPos(Window_Width >> 1, Window_Height >> 1); ShowCursor(FALSE); } Camera::Camera(CameraType cameraType) { _cameraType = cameraType; _pos = D3DXVECTOR3(0.0f, 0.0f, 0.0f); _right = D3DXVECTOR3(1.0f, 0.0f, 0.0f); _up = D3DXVECTOR3(0.0f, 1.0f, 0.0f); _look = D3DXVECTOR3(0.0f, 0.0f, 1.0f); } Camera::~Camera() { } void Camera::getPosition(D3DXVECTOR3* pos) { *pos = _pos; } void Camera::setPosition(D3DXVECTOR3* pos) { _pos = *pos; } void Camera::getRight(D3DXVECTOR3* right) { *right = _right; } void Camera::getUp(D3DXVECTOR3* up) { *up = _up; } void Camera::getLook(D3DXVECTOR3* look) { *look = _look; } void Camera::walk(float units) { // move only on xz plane for land object if( _cameraType == LANDOBJECT ) _pos += D3DXVECTOR3(_look.x, 0.0f, _look.z) * units; if( _cameraType == AIRCRAFT ) _pos += _look * units; } void Camera::strafe(float units) { // move only on xz plane for land object if( _cameraType == LANDOBJECT ) _pos += D3DXVECTOR3(_right.x, 0.0f, _right.z) * units; if( _cameraType == AIRCRAFT ) _pos += _right * units; } void Camera::fly(float units) { // move only on y-axis for land object if( _cameraType == LANDOBJECT ) _pos.y += units; if( _cameraType == AIRCRAFT ) _pos += _up * units; } void Camera::pitch(float angle) { D3DXMATRIX T; D3DXMatrixRotationAxis(&T, &_right, angle); // rotate _up and _look around _right vector D3DXVec3TransformCoord(&_up,&_up, &T); D3DXVec3TransformCoord(&_look,&_look, &T); } void Camera::yaw(float angle) { D3DXMATRIX T; // rotate around world y (0, 1, 0) always for land object if( _cameraType == LANDOBJECT ) D3DXMatrixRotationY(&T, angle); // rotate around own up vector for aircraft if( _cameraType == AIRCRAFT ) D3DXMatrixRotationAxis(&T, &_up, angle); // rotate _right and _look around _up or y-axis D3DXVec3TransformCoord(&_right,&_right, &T); D3DXVec3TransformCoord(&_look,&_look, &T); } void Camera::roll(float angle) { // only roll for aircraft type if( _cameraType == AIRCRAFT ) { D3DXMATRIX T; D3DXMatrixRotationAxis(&T, &_look, angle); // rotate _up and _right around _look vector D3DXVec3TransformCoord(&_right,&_right, &T); D3DXVec3TransformCoord(&_up,&_up, &T); } } void Camera::getViewMatrix(D3DXMATRIX* V) { // Keep camera's axes orthogonal to eachother D3DXVec3Normalize(&_look, &_look); D3DXVec3Cross(&_up, &_look, &_right); D3DXVec3Normalize(&_up, &_up); D3DXVec3Cross(&_right, &_up, &_look); D3DXVec3Normalize(&_right, &_right); // Build the view matrix: float x = -D3DXVec3Dot(&_right, &_pos); float y = -D3DXVec3Dot(&_up, &_pos); float z = -D3DXVec3Dot(&_look, &_pos); (*V)(0,0) = _right.x; (*V)(0, 1) = _up.x; (*V)(0, 2) = _look.x; (*V)(0, 3) = 0.0f; (*V)(1,0) = _right.y; (*V)(1, 1) = _up.y; (*V)(1, 2) = _look.y; (*V)(1, 3) = 0.0f; (*V)(2,0) = _right.z; (*V)(2, 1) = _up.z; (*V)(2, 2) = _look.z; (*V)(2, 3) = 0.0f; (*V)(3,0) = x; (*V)(3, 1) = y; (*V)(3, 2) = z; (*V)(3, 3) = 1.0f; } void Camera::setCameraType(CameraType cameraType) { _cameraType = cameraType; } void Camera::SetViewByMouse() { POINT mousePos; // 存储鼠标位置的结构体 int middleX = Window_Width >> 1; // 窗口宽度的一半 int middleY = Window_Height >> 1; // 窗口高度的一半 float angleY = 0.0f; // 存储向上看、向下看的角度 float angleZ = 0.0f; // 存储向左看、向右看的角度 static float currentRotX = 0.0f; // 存储总的向上、向下的旋转角度 // 获得当前鼠标位置 GetCursorPos(&mousePos); // 如果鼠标仍然在正中间，不更新场景 if ((mousePos.x == middleX) && (mousePos.y == middleY)) { return; } // 将鼠标置回屏幕的中央 SetCursorPos(middleX, middleY); // 获得鼠标移动的方向 angleY = (float)((middleX - mousePos.x)) / 6000.0f; angleZ = (float)((middleY - mousePos.y)) / 6000.0f; // 保存一个当前向上或向下旋转过的角度，可以限制Camera上下做360度旋转 currentRotX -= angleZ; // 如果当前的旋转弧度大于1.3，不让Camera继续向上旋转 if (currentRotX > 1.3f) { currentRotX = 1.3f; } // 如果当前的旋转弧度小于1.3，不让Camera继续向下旋转 else if (currentRotX < -1.3f) { currentRotX = -1.3f; } // 否则绕所处位置旋转视线 else { // 绕Camera的水平向量旋转Camera（上下） pitch(angleZ); // 绕Camera的向上向量旋转Camera（左右） yaw(angleY); } ShowCursor(FALSE); }