orbittransformcontroller.cpp Example File | Qt 3D 5.12.10

- Qt 5.12
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- Qt 3D: Simple C++ Example
- orbittransformcontroller.cpp Example File
- Qt 5.12.10 Reference Documentation

# orbittransformcontroller.cpp Example File

simple-cpp/orbittransformcontroller.cpp

     /****************************************************************************
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     ** Copyright (C) 2016 Klaralvdalens Datakonsult AB (KDAB).
     ** Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
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     #include "orbittransformcontroller.h"

     #include <Qt3DCore/qtransform.h>

     OrbitTransformController::OrbitTransformController(QObject *parent)
         : QObject(parent)
         , m_target(nullptr)
         , m_matrix()
         , m_radius(1.0f)
         , m_angle(0.0f)
     {
     }

     void OrbitTransformController::setTarget(Qt3DCore::QTransform *target)
     {
         if (m_target != target) {
             m_target = target;
             emit targetChanged();
         }
     }

     Qt3DCore::QTransform *OrbitTransformController::target() const
     {
         return m_target;
     }

     void OrbitTransformController::setRadius(float radius)
     {
         if (!qFuzzyCompare(radius, m_radius)) {
             m_radius = radius;
             updateMatrix();
             emit radiusChanged();
         }
     }

     float OrbitTransformController::radius() const
     {
         return m_radius;
     }

     void OrbitTransformController::setAngle(float angle)
     {
         if (!qFuzzyCompare(angle, m_angle)) {
             m_angle = angle;
             updateMatrix();
             emit angleChanged();
         }
     }

     float OrbitTransformController::angle() const
     {
         return m_angle;
     }

     void OrbitTransformController::updateMatrix()
     {
         m_matrix.setToIdentity();
         m_matrix.rotate(m_angle, QVector3D(0.0f, 1.0f, 0.0f));
         m_matrix.translate(m_radius, 0.0f, 0.0f);
         m_target->setMatrix(m_matrix);
     }