orbittransformcontroller.cpp Example File | Qt 3D 5.12.6

Qt 5.12 | Qt 3D | Qt 3D: Simple C++ Example | orbittransformcontroller.cpp Example File

Qt 5.12.6 Reference Documentation

# orbittransformcontroller.cpp Example File

simple-cpp/orbittransformcontroller.cpp

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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);
      }