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C++ QVector4D::setW方法代码示例

本文整理汇总了C++中QVector4D::setW方法的典型用法代码示例。如果您正苦于以下问题：C++ QVector4D::setW方法的具体用法？C++ QVector4D::setW怎么用？C++ QVector4D::setW使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QVector4D的用法示例。


在下文中一共展示了QVector4D::setW方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: retrieveColor

inline void AssimpScene::retrieveColor(
    const aiMaterial * mtl
,   const char * pKey
,   const unsigned int type
,   const unsigned int index
,   QVector4D & color
,   const float r
,   const float g
,   const float b
,   const float a) 
{
    aiColor4D acolor;
    if (AI_SUCCESS == aiGetMaterialColor(mtl, pKey, type, index, &acolor))
    {
        color.setX(acolor.r);
        color.setY(acolor.g);
        color.setZ(acolor.b);
        color.setW(acolor.a);
    }
    else
    {
        color.setX(r);
        color.setY(g);
        color.setZ(b);
        color.setW(a);
    }
}
开发者ID:Nuos，项目名称:demo_lod，代码行数:27，代码来源:AssimpScene.cpp

示例2: getValue

void PropertyGroup::getValue(QVector4D & v)
{
	v.setX(properties.at(0)->getValue());
	v.setY(properties.at(1)->getValue());
	v.setZ(properties.at(2)->getValue());
	v.setW(properties.at(3)->getValue());
}
开发者ID:otah007，项目名称:fractal-z，代码行数:7，代码来源:propertygroup.cpp

示例3: tmp

static QVector3D unproject( QVector3D v, const QMatrix4x4 &modelView, const QMatrix4x4 &projection, QRect viewport )
{
  // Reimplementation of QVector3D::unproject() - see qtbase/src/gui/math3d/qvector3d.cpp
  // The only difference is that the original implementation uses tolerance 1e-5
  // (see qFuzzyIsNull()) as a protection against division by zero. For us it is however
  // common to get lower values (e.g. as low as 1e-8 when zoomed out to the whole Earth with web mercator).

  QMatrix4x4 inverse = QMatrix4x4( projection * modelView ).inverted();

  QVector4D tmp( v, 1.0f );
  tmp.setX( ( tmp.x() - float( viewport.x() ) ) / float( viewport.width() ) );
  tmp.setY( ( tmp.y() - float( viewport.y() ) ) / float( viewport.height() ) );
  tmp = tmp * 2.0f - QVector4D( 1.0f, 1.0f, 1.0f, 1.0f );

  QVector4D obj = inverse * tmp;
  if ( qgsDoubleNear( obj.w(), 0, 1e-10 ) )
    obj.setW( 1.0f );
  obj /= obj.w();
  return obj.toVector3D();
}
开发者ID:alexbruy，项目名称:QGIS，代码行数:20，代码来源:qgscameracontroller.cpp

示例4: unproject

QVector4D GLScene::unproject(const QVector3D & screen){
    GLint viewport[4];
    glGetIntegerv(GL_VIEWPORT, viewport);

    const qreal xNorm = (2.0f * ((screen.x() - viewport[0]) / (viewport[2] - viewport[0]))) - 1.0f;
    const qreal yNorm = 1.0f - (2.0f * ((screen.y() - viewport[1]) / (viewport[3] - viewport[1])));

    QMatrix4x4 pvMatrixInv = camera().projViewProduct().inverted();
    QVector4D worldPoint = pvMatrixInv * QVector4D(xNorm, yNorm, screen.z(), 1);

    if (worldPoint.w() == 0){
        return QVector4D(0,0,0,0);
    }

    worldPoint.setW(1 / worldPoint.w());
    worldPoint.setX(worldPoint.x() * worldPoint.w());
    worldPoint.setY(worldPoint.y() * worldPoint.w());

    return worldPoint;
}
开发者ID:sudnikand，项目名称:QBox2D，代码行数:20，代码来源:glscene.cpp

示例5: setData

bool PropertyMatrixModel::setData(const QModelIndex &index, const QVariant &data, int role)
{
  if (!index.isValid())
    return false;

  if (role != Qt::EditRole)
    return false;

  bool ok = false;
  float floatData = data.toFloat(&ok);

  if (!ok)
    return false;

  switch (m_matrix.type()) {
    case QVariant::Vector2D: {
      QVector2D value = m_matrix.value<QVector2D>();
      switch (index.row()) {
        case 0: value.setX(floatData); break;
        case 1: value.setY(floatData); break;
      }

      m_matrix = value;
      break;
    }

    case QVariant::Vector3D: {
      QVector3D value = m_matrix.value<QVector3D>();
      switch (index.row()) {
        case 0: value.setX(floatData); break;
        case 1: value.setY(floatData); break;
        case 2: value.setZ(floatData); break;
      }

      m_matrix = value;
      break;
    }

    case QVariant::Vector4D: {
      QVector4D value = m_matrix.value<QVector4D>();
      switch (index.row()) {
        case 0: value.setX(floatData); break;
        case 1: value.setY(floatData); break;
        case 2: value.setZ(floatData); break;
        case 3: value.setW(floatData); break;
      }

      m_matrix = value;
      break;
    }

#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
    case QVariant::Quaternion: {
      float pitch, yaw, roll;

      const QQuaternion value = m_matrix.value<QQuaternion>();
      value.getEulerAngles(&pitch, &yaw, &roll);
      switch (index.row()) {
        case 0: pitch = floatData; break;
        case 1: yaw = floatData; break;
        case 2: roll = floatData; break;
      }

      m_matrix = QQuaternion::fromEulerAngles(pitch, yaw, roll);
      break;
    }
#endif

    case QVariant::Matrix: {
      QMatrix value = m_matrix.value<QMatrix>();

      switch (index.row() << 4 | index.column()) {
        case 0x00: value.setMatrix(floatData, value.m12(), value.m21(), value.m22(), value.dx(), value.dy()); break;
        case 0x01: value.setMatrix(value.m11(), floatData, value.m21(), value.m22(), value.dx(), value.dy()); break;
        case 0x10: value.setMatrix(value.m11(), value.m12(), floatData, value.m22(), value.dx(), value.dy()); break;
        case 0x11: value.setMatrix(value.m11(), value.m12(), value.m21(), floatData, value.dx(), value.dy()); break;
        case 0x20: value.setMatrix(value.m11(), value.m12(), value.m21(), value.m22(), floatData, value.dy()); break;
        case 0x21: value.setMatrix(value.m11(), value.m12(), value.m21(), value.m22(), value.dx(), floatData); break;
      }

      m_matrix = value;
      break;
    }

    case QVariant::Transform: {
      QTransform value = m_matrix.value<QTransform>();

      switch (index.row() << 4 | index.column()) {
        case 0x00: value.setMatrix(floatData, value.m12(), value.m13(), value.m21(), value.m22(), value.m23(), value.m31(), value.m32(), value.m33()); break;
        case 0x01: value.setMatrix(value.m11(), floatData, value.m13(), value.m21(), value.m22(), value.m23(), value.m31(), value.m32(), value.m33()); break;
        case 0x02: value.setMatrix(value.m11(), value.m12(), floatData, value.m21(), value.m22(), value.m23(), value.m31(), value.m32(), value.m33()); break;
        case 0x10: value.setMatrix(value.m11(), value.m12(), value.m13(), floatData, value.m22(), value.m23(), value.m31(), value.m32(), value.m33()); break;
        case 0x11: value.setMatrix(value.m11(), value.m12(), value.m13(), value.m21(), floatData, value.m23(), value.m31(), value.m32(), value.m33()); break;
        case 0x12: value.setMatrix(value.m11(), value.m12(), value.m13(), value.m21(), value.m22(), floatData, value.m31(), value.m32(), value.m33()); break;
        case 0x20: value.setMatrix(value.m11(), value.m12(), value.m13(), value.m21(), value.m22(), value.m23(), floatData, value.m32(), value.m33()); break;
        case 0x21: value.setMatrix(value.m11(), value.m12(), value.m13(), value.m21(), value.m22(), value.m23(), value.m31(), floatData, value.m33()); break;
        case 0x22: value.setMatrix(value.m11(), value.m12(), value.m13(), value.m21(), value.m22(), value.m23(), value.m31(), value.m32(), floatData); break;
      }

      m_matrix = value;
//.........这里部分代码省略.........
开发者ID:jifuyi，项目名称:GammaRay，代码行数:101，代码来源:propertymatrixmodel.cpp

示例6: leftMouseDown

void CombinedNavRenderer::leftMouseDown( int x, int y )
{
    float xf = static_cast<float>( x );
    float yf = static_cast<float>( m_height - y );

    QVector4D test;
    test.setX( ( 2 * xf ) / m_width - 1 );
    test.setY( ( 2 * yf ) / m_height - 1 );
    test.setZ( 1 );
    test.setW( 1 );

    int xout;
    int yout;

    QVector4D out = m_mvpMatrix.inverted() * test;
    QModelIndex mi;
    if ( m_ratio > 1.5 )
    {
        xout = out.x() / m_dx;
        if ( ( (float)out.x()  / m_dx ) < m_nx )
        {
            xout = qMax( 0, qMin( xout, static_cast<int>( m_nx - 1.0 ) ) );
            yout = out.y() / m_dy;
            yout = qMax( 0, qMin( yout, static_cast<int>( m_ny - 1.0 ) ) );
            mi = model()->index( (int)Fn::Global::SAGITTAL_CORONAL, 0 );
        }
        else if ( ( (float)out.x() / m_dx ) < m_nx * 2  )
        {
            xout = xout - m_nx;
            xout = qMax( 0, qMin( xout, static_cast<int>( m_nx - 1.0 ) ) );
            yout = out.y() / m_dz;
            yout = qMax( 0, qMin( yout, static_cast<int>( m_nz - 1.0 ) ) );
            mi = model()->index( (int)Fn::Global::SAGITTAL_AXIAL, 0 );
        }
        else
        {
            xout = xout - ( 2 * m_nx );
            xout = qMax( 0, qMin( m_ny - xout - 1, static_cast<int>( m_ny - 1.0 ) ) );
            yout = out.y() / m_dz;
            yout = qMax( 0, qMin( yout, static_cast<int>( m_nz - 1.0 ) ) );
            mi = model()->index( (int)Fn::Global::CORONAL_AXIAL, 0 );
        }
    }
    else if ( m_ratio < 0.66 )
    {
        yout = out.y() / m_dz;
        if ( ( (float)out.y() / m_dz ) < m_nz )
        {
            xout = out.x() / m_dy;
            xout = qMax( 0, qMin( m_ny - xout - 1, static_cast<int>( m_ny - 1.0 ) ) );
            yout = qMax( 0, qMin( yout, static_cast<int>( m_nz - 1.0 ) ) );
            mi = model()->index( (int)Fn::Global::CORONAL_AXIAL, 0 );
        }
        else if ( ( (float)out.y() / m_dz ) < m_nz * 2  )
        {
            xout = out.x() / m_dx;
            xout = qMax( 0, qMin( xout, static_cast<int>( m_nx - 1.0 ) ) );
            yout = yout - m_nz;
            yout = qMax( 0, qMin( yout, static_cast<int>( m_nz - 1.0 ) ) );
            mi = model()->index( (int)Fn::Global::SAGITTAL_AXIAL, 0 );
        }
        else
        {
            xout = out.x() / m_dx;
            xout = qMax( 0, qMin( xout, static_cast<int>( m_nx - 1.0 ) ) );
            yout = yout - ( 2 * m_nz );
            yout = qMax( 0, qMin( yout, static_cast<int>( m_ny - 1.0 ) ) );
            mi = model()->index( (int)Fn::Global::SAGITTAL_CORONAL, 0 );
        }
    }
    else
    {
        xout = out.x() / m_dx;
        yout = out.y() / m_dy;
        if ( ( (float)out.x()  / m_dx ) < m_nx )
        {
            if ( ( (float)out.y() / m_dy ) < m_nz )
            {
                xout = qMax( 0, qMin( xout, static_cast<int>( m_nx - 1.0 ) ) );
                yout = qMax( 0, qMin( yout, static_cast<int>( m_ny - 1.0 ) ) );
                mi = model()->index( (int)Fn::Global::SAGITTAL_CORONAL, 0 );
            }
            else
            {
                xout = qMax( 0, qMin( xout, static_cast<int>( m_nx - 1.0 ) ) );
                yout = yout - m_ny;
                yout = qMax( 0, qMin( yout, static_cast<int>( m_nz - 1.0 ) ) );
                mi = model()->index( (int)Fn::Global::SAGITTAL_AXIAL, 0 );
            }
        }
        else
        {
            xout = xout - m_nx;
            xout = qMax( 0, qMin( m_ny - xout- 1, static_cast<int>( m_ny - 1.0 ) ) );
            yout = yout - m_ny;
            yout = qMax( 0, qMin( yout, static_cast<int>( m_nz - 1.0 ) ) );
            mi = model()->index( (int)Fn::Global::CORONAL_AXIAL, 0 );
        }
    }
    QPoint p( xout, yout );
//.........这里部分代码省略.........
开发者ID:yangguang-ecnu，项目名称:fibernavigator2，代码行数:101，代码来源:combinednavrenderer.cpp


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