Custom Items Example¶
Adding custom items to a surface graph.
The custom items example shows how to add your own custom meshes as items to a graph, and how to remove them.
Running the Example¶
To run the example from Qt Creator , open the Welcome mode and select the example from Examples . For more information, visit Building and Running an Example.
Adding Custom Meshes to the Application¶
We’ll add the meshes in a resource file:<RCC> ... <qresource prefix="/items"> <file>refinery.obj</file> <file>oilrig.obj</file> </qresource> </RCC>
Adding Custom Item to a Graph¶
In this example we do not have specific textures for our meshes, so we’ll just create a small
QImageand fill it with a single color:QImage color = QImage(2, 2, QImage::Format_RGB32); color.fill(Qt::red);
Then we’ll specify the position for the item in a variable. This way we’ll be able to use it later for removing the correct item:QVector3D positionOne = QVector3D(39.0f, 77.0f, 19.2f);
Then we’ll create a new
QCustom3DItemwith all the parameters:QCustom3DItem *item = new QCustom3DItem(":/items/oilrig.obj", positionOne, QVector3D(0.025f, 0.025f, 0.025f), QQuaternion::fromAxisAndAngle(0.0f, 1.0f, 0.0f, 45.0f), color);
And finally we’ll just add the item:m_graph->addCustomItem(item);
Removing Custom Item from a Graph¶
We’ll just call
removeCustomItemAt()with the position of the item:m_graph->removeCustomItemAt(positionOne);
Removing a custom item from the graph also deletes it. If you want to preserve the item, you need to use
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