// Copyright (C) 2017 The Qt Company Ltd. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #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; }