trefoilknot.cpp Example File

  /****************************************************************************
  **
  ** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the Qt3D module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** "Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
  **     notice, this list of conditions and the following disclaimer in
  **     the documentation and/or other materials provided with the
  **     distribution.
  **   * Neither the name of The Qt Company Ltd nor the names of its
  **     contributors may be used to endorse or promote products derived
  **     from this software without specific prior written permission.
  **
  **
  ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/

  #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();
  }