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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
//
// 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
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
#endif
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