camera.cpp Example File

hellovulkancubes/camera.cpp
/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/
#include "camera.h" Camera::Camera(const QVector3D &pos) : m_forward(0.0f, 0.0f, -1.0f), m_right(1.0f, 0.0f, 0.0f), m_up(0.0f, 1.0f, 0.0f), m_pos(pos), m_yaw(0.0f), m_pitch(0.0f) { } static inline void clamp360(float *v) { if (*v > 360.0f) *v -= 360.0f; if (*v < -360.0f) *v += 360.0f; } void Camera::yaw(float degrees) { m_yaw += degrees; clamp360(&m_yaw); m_yawMatrix.setToIdentity(); m_yawMatrix.rotate(m_yaw, 0, 1, 0); QMatrix4x4 rotMat = m_pitchMatrix * m_yawMatrix; m_forward = (QVector4D(0.0f, 0.0f, -1.0f, 0.0f) * rotMat).toVector3D(); m_right = (QVector4D(1.0f, 0.0f, 0.0f, 0.0f) * rotMat).toVector3D(); } void Camera::pitch(float degrees) { m_pitch += degrees; clamp360(&m_pitch); m_pitchMatrix.setToIdentity(); m_pitchMatrix.rotate(m_pitch, 1, 0, 0); QMatrix4x4 rotMat = m_pitchMatrix * m_yawMatrix; m_forward = (QVector4D(0.0f, 0.0f, -1.0f, 0.0f) * rotMat).toVector3D(); m_up = (QVector4D(0.0f, 1.0f, 0.0f, 0.0f) * rotMat).toVector3D(); } void Camera::walk(float amount) { m_pos[0] += amount * m_forward.x(); m_pos[2] += amount * m_forward.z(); } void Camera::strafe(float amount) { m_pos[0] += amount * m_right.x(); m_pos[2] += amount * m_right.z(); } QMatrix4x4 Camera::viewMatrix() const { QMatrix4x4 m = m_pitchMatrix * m_yawMatrix; m.translate(-m_pos); return m; }