| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Data Visualization module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
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| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 or (at your option) any later version |
| ** approved by the KDE Free Qt Foundation. The licenses are as published by |
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the QtDataVisualization API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| |
| #ifndef CAMERAHELPER_P_H |
| #define CAMERAHELPER_P_H |
| |
| #include "datavisualizationglobal_p.h" |
| #include "q3dcamera.h" |
| |
| QT_BEGIN_NAMESPACE |
| class QMatrix4x4; |
| class QPoint; |
| QT_END_NAMESPACE |
| |
| QT_BEGIN_NAMESPACE_DATAVISUALIZATION |
| |
| class CameraHelper : public QObject |
| { |
| Q_OBJECT |
| |
| private: |
| QVector3D m_position; |
| QVector3D m_target; |
| QVector3D m_up; |
| |
| QPoint m_previousMousePos; |
| |
| GLfloat m_xRotation; |
| GLfloat m_yRotation; |
| GLfloat m_defaultXRotation; |
| GLfloat m_defaultYRotation; |
| |
| GLfloat m_rotationSpeed; |
| |
| public: |
| explicit CameraHelper(QObject *parent = 0); |
| ~CameraHelper(); |
| |
| // How fast camera rotates when mouse is dragged. Default is 100. |
| void setRotationSpeed(int speed); |
| // Set camera rotation in degrees |
| void setCameraRotation(const QPointF &rotation); |
| // Get camera rotations |
| QPointF getCameraRotations(); |
| // Set default camera orientation. Position's x and y should be 0. |
| void setDefaultCameraOrientation(const QVector3D &defaultPosition, |
| const QVector3D &defaultTarget, |
| const QVector3D &defaultUp); |
| // Calculate view matrix based on rotation and zoom |
| QMatrix4x4 calculateViewMatrix(const QPoint &mousePos, int zoom, |
| int screenWidth, int screenHeight, |
| bool showUnder = false); |
| // Calcluate light position based on rotation. Call after calling calculateViewMatrix to get |
| // up-to-date position |
| QVector3D calculateLightPosition(const QVector3D &lightPosition, |
| GLfloat fixedRotation = 0.0f, |
| GLfloat distanceModifier = 0.0f); |
| void updateMousePos(const QPoint &mousePos); |
| void setCameraPreset(Q3DCamera::CameraPreset preset); |
| }; |
| |
| QT_END_NAMESPACE_DATAVISUALIZATION |
| |
| #endif |