The Q3DSurface class provides methods for rendering 3D surface plots. 更多...
| 头： | #include <Q3DSurface> |
| qmake: | QT += datavisualization |
| Since: | QtDataVisualization 1.0 |
| 继承： | QAbstract3DGraph |
该类在 QtDataVisualization 1.0 引入。
|
| Q3DSurface (const QSurfaceFormat * format = nullptr, QWindow * parent = nullptr) | |
| virtual | ~Q3DSurface () |
| void | addAxis (QValue3DAxis * axis ) |
| void | addSeries (QSurface3DSeries * series ) |
| QList<QValue3DAxis *> | axes () const |
| QValue3DAxis * | axisX () const |
| QValue3DAxis * | axisY () const |
| QValue3DAxis * | axisZ () const |
| bool | flipHorizontalGrid () const |
| void | releaseAxis (QValue3DAxis * axis ) |
| void | removeSeries (QSurface3DSeries * series ) |
| QSurface3DSeries * | selectedSeries () const |
| QList<QSurface3DSeries *> | seriesList () const |
| void | setAxisX (QValue3DAxis * axis ) |
| void | setAxisY (QValue3DAxis * axis ) |
| void | setAxisZ (QValue3DAxis * axis ) |
| void | setFlipHorizontalGrid (bool flip ) |
| void | axisXChanged (QValue3DAxis * axis ) |
| void | axisYChanged (QValue3DAxis * axis ) |
| void | axisZChanged (QValue3DAxis * axis ) |
| void | flipHorizontalGridChanged (bool flip ) |
| void | selectedSeriesChanged (QSurface3DSeries * series ) |
This class enables developers to render 3D surface plots and to view them by rotating the scene freely. The visual properties of the surface such as draw mode and shading can be controlled via QSurface3DSeries .
The Q3DSurface supports selection by showing a highlighted ball on the data point where the user has clicked with left mouse button (when default input handler is in use) or selected via QSurface3DSeries . The selection pointer is accompanied with a label which in default case shows the value of the data point and the coordinates of the point.
The value range and the label format shown on the axis can be controlled through QValue3DAxis .
To rotate the graph, hold down the right mouse button and move the mouse. Zooming is done using mouse wheel. Both assume the default input handler is in use.
If no axes are set explicitly to Q3DSurface, temporary default axes with no labels are created. These default axes can be modified via axis accessors, but as soon any axis is set explicitly for the orientation, the default axis for that orientation is destroyed.
First, construct Q3DSurface. Since we are running the graph as top level window in this example, we need to clear the
Qt::FramelessWindowHint
flag, which gets set by default:
Q3DSurface surface; surface.setFlags(surface.flags() ^ Qt::FramelessWindowHint);
Now Q3DSurface is ready to receive data to be rendered. Create data elements to receive values:
QSurfaceDataArray *data = new QSurfaceDataArray; QSurfaceDataRow *dataRow1 = new QSurfaceDataRow; QSurfaceDataRow *dataRow2 = new QSurfaceDataRow;
First feed the data to the row elements and then add their pointers to the data element:
*dataRow1 << QVector3D(0.0f, 0.1f, 0.5f) << QVector3D(1.0f, 0.5f, 0.5f); *dataRow2 << QVector3D(0.0f, 1.8f, 1.0f) << QVector3D(1.0f, 1.2f, 1.0f); *data << dataRow1 << dataRow2;
Create a new series and set data to it:
QSurface3DSeries *series = new QSurface3DSeries; series->dataProxy()->resetArray(data); surface.addSeries(series);
Finally you will need to set it visible:
surface.show();
The complete code needed to create and display this graph is:
#include <QtDataVisualization> using namespace QtDataVisualization; int main(int argc, char **argv) { QGuiApplication app(argc, argv); Q3DSurface surface; surface.setFlags(surface.flags() ^ Qt::FramelessWindowHint); QSurfaceDataArray *data = new QSurfaceDataArray; QSurfaceDataRow *dataRow1 = new QSurfaceDataRow; QSurfaceDataRow *dataRow2 = new QSurfaceDataRow; *dataRow1 << QVector3D(0.0f, 0.1f, 0.5f) << QVector3D(1.0f, 0.5f, 0.5f); *dataRow2 << QVector3D(0.0f, 1.8f, 1.0f) << QVector3D(1.0f, 1.2f, 1.0f); *data << dataRow1 << dataRow2; QSurface3DSeries *series = new QSurface3DSeries; series->dataProxy()->resetArray(data); surface.addSeries(series); surface.show(); return app.exec(); }
And this is what those few lines of code produce:
The scene can be rotated, zoomed into, and a surface point can be selected to view its position, but no other interaction is included in this minimal code example. You can learn more by familiarizing yourself with the examples provided, like the 表面范例 .
另请参阅 Q3DBars , Q3DScatter ，和 Qt Data Visualization C++ 类 .
This property holds the active x-axis.
访问函数：
| QValue3DAxis * | axisX () const |
| void | setAxisX (QValue3DAxis * axis ) |
通知程序信号：
| void | axisXChanged (QValue3DAxis * axis ) |
This property holds the active y-axis.
访问函数：
| QValue3DAxis * | axisY () const |
| void | setAxisY (QValue3DAxis * axis ) |
通知程序信号：
| void | axisYChanged (QValue3DAxis * axis ) |
This property holds the active z-axis.
访问函数：
| QValue3DAxis * | axisZ () const |
| void | setAxisZ (QValue3DAxis * axis ) |
通知程序信号：
| void | axisZChanged (QValue3DAxis * axis ) |
This property holds whether the horizontal axis grid is displayed on top of the graph rather than on the bottom.
In some use cases the horizontal axis grid is mostly covered by the surface, so it can be more useful to display the horizontal axis grid on top of the graph rather than on the bottom. A typical use case for this is showing 2D spectrograms using orthoGraphic projection with a top-down viewpoint.
若
false
, the horizontal axis grid and labels are drawn on the horizontal background of the graph. If
true
, the horizontal axis grid and labels are drawn on the opposite side of the graph from the horizontal background. Defaults to
false
.
该特性在 QtDataVisualization 1.2 引入。
访问函数：
| bool | flipHorizontalGrid () const |
| void | setFlipHorizontalGrid (bool flip ) |
通知程序信号：
| void | flipHorizontalGridChanged (bool flip ) |
This property holds the selected series or null.
若
selectionMode
has
SelectionMultiSeries
set, this property holds the series which owns the selected point.
访问函数：
| QSurface3DSeries * | selectedSeries () const |
通知程序信号：
| void | selectedSeriesChanged (QSurface3DSeries * series ) |
Constructs a new 3D surface graph with optional parent window and surface format .
[虚拟]
Q3DSurface::
~Q3DSurface
()
Destroys the 3D surface graph.
添加 axis to the graph. The axes added via addAxis are not yet taken to use, addAxis is simply used to give the ownership of the axis to the graph. The axis must not be null or added to another graph.
另请参阅 releaseAxis (), setAxisX (), setAxisY ()，和 setAxisZ ().
添加 series to the graph. A graph can contain multiple series, but has only one set of axes. If the newly added series has specified a selected item, it will be highlighted and any existing selection will be cleared. Only one added series can have an active selection.
Returns the list of all added axes.
另请参阅 addAxis ().
Releases the ownership of the axis back to the caller, if it is added to this graph. If the released axis is in use, a new default axis will be created and set active.
If the default axis is released and added back later, it behaves as any other axis would.
另请参阅 addAxis (), setAxisX (), setAxisY ()，和 setAxisZ ().
移除 series from the graph.
Returns the list of series added to this graph.
设置 axis as the active x-axis. Implicitly calls addAxis () to transfer the ownership of the axis to this graph.
若 axis is null, a temporary default axis with no labels and an automatically adjusting range is created.
This temporary axis is destroyed if another axis is set explicitly to the same orientation.
注意： setter 函数对于特性 axisX .
另请参阅 axisX (), addAxis ()，和 releaseAxis ().
设置 axis as the active y-axis. Implicitly calls addAxis () to transfer the ownership of the axis to this graph.
若 axis is null, a temporary default axis with no labels and an automatically adjusting range is created.
This temporary axis is destroyed if another axis is set explicitly to the same orientation.
注意： setter 函数对于特性 axisY .
另请参阅 axisY (), addAxis ()，和 releaseAxis ().
设置 axis as the active z-axis. Implicitly calls addAxis () to transfer the ownership of the axis to this graph.
若 axis is null, a temporary default axis with no labels and an automatically adjusting range is created.
This temporary axis is destroyed if another axis is set explicitly to the same orientation.
注意： setter 函数对于特性 axisZ .
另请参阅 axisZ (), addAxis ()，和 releaseAxis ().