trefoilknot.cpp Example File

materials-cpp/trefoilknot.cpp

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  #include "trefoilknot.h"

  TrefoilKnot::TrefoilKnot(Qt3DCore::QNode *parent)
      : Qt3DCore::QEntity(parent)
      , m_mesh(new Qt3DRender::QMesh())
      , m_transform(new Qt3DCore::QTransform())
      , m_position()
      , m_scale(1.0f)
  {
      m_mesh->setSource(QUrl("qrc:/assets/obj/trefoil.obj"));
      addComponent(m_mesh);
      addComponent(m_transform);
  }

  TrefoilKnot::~TrefoilKnot()
  {
  }

  void TrefoilKnot::updateTransform()
  {
      QMatrix4x4 m;
      m.translate(m_position);
      m.rotate(m_phi, QVector3D(1.0f, 0.0f, 0.0f));
      m.rotate(m_phi, QVector3D(0.0f, 1.0f, 0.0f));
      m.scale(m_scale);
      m_transform->setMatrix(m);
  }

  float TrefoilKnot::theta() const
  {
      return m_theta;
  }

  float TrefoilKnot::phi() const
  {
      return m_phi;
  }

  QVector3D TrefoilKnot::position() const
  {
      return m_position;
  }

  float TrefoilKnot::scale() const
  {
      return m_scale;
  }

  void TrefoilKnot::setTheta(float theta)
  {
      if (m_theta == theta)
          return;

      m_theta = theta;
      emit thetaChanged(theta);
      updateTransform();
  }

  void TrefoilKnot::setPhi(float phi)
  {
      if (m_phi == phi)
          return;

      m_phi = phi;
      emit phiChanged(phi);
      updateTransform();
  }

  void TrefoilKnot::setPosition(QVector3D position)
  {
      if (m_position == position)
          return;

      m_position = position;
      emit positionChanged(position);
      updateTransform();
  }

  void TrefoilKnot::setScale(float scale)
  {
      if (m_scale == scale)
          return;

      m_scale = scale;
      emit scaleChanged(scale);
      updateTransform();
  }