QgsMeshDatasetValue QgsMeshLayer::datasetValue( const QgsMeshDatasetIndex &index, const QgsPointXY &point ) const
{
QgsMeshDatasetValue value;
if ( mTriangularMesh && dataProvider() && dataProvider()->isValid() && index.isValid() )
{
int faceIndex = mTriangularMesh->faceIndexForPoint( point ) ;
if ( faceIndex >= 0 )
{
int nativeFaceIndex = mTriangularMesh->trianglesToNativeFaces().at( faceIndex );
if ( dataProvider()->isFaceActive( index, nativeFaceIndex ) )
{
if ( dataProvider()->datasetGroupMetadata( index ).dataType() == QgsMeshDatasetGroupMetadata::DataOnFaces )
{
int nativeFaceIndex = mTriangularMesh->trianglesToNativeFaces().at( faceIndex );
value = dataProvider()->datasetValue( index, nativeFaceIndex );
}
else
{
const QgsMeshFace &face = mTriangularMesh->triangles()[faceIndex];
const int v1 = face[0], v2 = face[1], v3 = face[2];
const QgsPoint p1 = mTriangularMesh->vertices()[v1], p2 = mTriangularMesh->vertices()[v2], p3 = mTriangularMesh->vertices()[v3];
const QgsMeshDatasetValue val1 = dataProvider()->datasetValue( index, v1 );
const QgsMeshDatasetValue val2 = dataProvider()->datasetValue( index, v2 );
const QgsMeshDatasetValue val3 = dataProvider()->datasetValue( index, v3 );
const double x = QgsMeshLayerUtils::interpolateFromVerticesData( p1, p2, p3, val1.x(), val2.x(), val3.x(), point );
double y = std::numeric_limits<double>::quiet_NaN();
bool isVector = dataProvider()->datasetGroupMetadata( index ).isVector();
if ( isVector )
y = QgsMeshLayerUtils::interpolateFromVerticesData( p1, p2, p3, val1.y(), val2.y(), val3.y(), point );
value = QgsMeshDatasetValue( x, y );
}
}
}
}
return value;
}
void QgsMeshRendererActiveDatasetWidget::updateMetadata( QgsMeshDatasetIndex datasetIndex )
{
if ( !mMeshLayer ||
!mMeshLayer->dataProvider() ||
!datasetIndex.isValid() )
{
mActiveDatasetMetadata->setText( tr( "No dataset selected" ) );
}
else
{
QString msg;
msg += QStringLiteral( "<table>" );
const QgsMeshDatasetMetadata meta = mMeshLayer->dataProvider()->datasetMetadata( datasetIndex );
msg += QStringLiteral( "<tr><td>%1</td><td>%2</td></tr>" )
.arg( tr( "Is valid" ) )
.arg( meta.isValid() ? tr( "Yes" ) : tr( "No" ) );
msg += QStringLiteral( "<tr><td>%1</td><td>%2</td></tr>" )
.arg( tr( "Time" ) )
.arg( meta.time() );
const QgsMeshDatasetGroupMetadata gmeta = mMeshLayer->dataProvider()->datasetGroupMetadata( datasetIndex );
msg += QStringLiteral( "<tr><td>%1</td><td>%2</td></tr>" )
.arg( tr( "Data Type" ) )
.arg( gmeta.dataType() == QgsMeshDatasetGroupMetadata::DataOnVertices ? tr( "Defined on vertices" ) : tr( "Defined on faces" ) );
msg += QStringLiteral( "<tr><td>%1</td><td>%2</td></tr>" )
.arg( tr( "Is vector" ) )
.arg( gmeta.isVector() ? tr( "Yes" ) : tr( "No" ) );
for ( auto it = gmeta.extraOptions().constBegin(); it != gmeta.extraOptions().constEnd(); ++it )
{
msg += QStringLiteral( "<tr><td>%1</td><td>%2</td></tr>" ).arg( it.key() ).arg( it.value() );
}
msg += QStringLiteral( "</table>" );
mActiveDatasetMetadata->setText( msg );
}
}