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Diffstat (limited to 'src/datavisualization/utils/camerahelper_p.h')
-rw-r--r-- | src/datavisualization/utils/camerahelper_p.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/src/datavisualization/utils/camerahelper_p.h b/src/datavisualization/utils/camerahelper_p.h new file mode 100644 index 00000000..1ef4d257 --- /dev/null +++ b/src/datavisualization/utils/camerahelper_p.h @@ -0,0 +1,90 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc +** All rights reserved. +** For any questions to Digia, please use contact form at http://qt.digia.com +** +** This file is part of the QtDataVisualization module. +** +** Licensees holding valid Qt Enterprise licenses may use this file in +** accordance with the Qt Enterprise License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. +** +** If you have questions regarding the use of this file, please use +** contact form at http://qt.digia.com +** +****************************************************************************/ + +// +// 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 CAMERAPOSITIONER_P_H +#define CAMERAPOSITIONER_P_H + +#include "datavisualizationglobal_p.h" +#include "q3dbars.h" +#include <QObject> + +class QMatrix4x4; +class QVector3D; +class QPoint; +class QPointF; + +QT_DATAVISUALIZATION_BEGIN_NAMESPACE + +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(QDataVis::CameraPreset preset); +}; + +QT_DATAVISUALIZATION_END_NAMESPACE + +#endif |