mirror of
https://github.com/harfang3d/harfang3d.git
synced 2024-06-26 08:22:35 +00:00
25 lines
1.1 KiB
Markdown
25 lines
1.1 KiB
Markdown
.title Extending the scene plugin
|
|
|
|
## Writing a scene tool plugin
|
|
|
|
A scene tool plugin must be declared as a class extending the `plugin.ISceneToolPlugin` interface.
|
|
|
|
```python
|
|
class Plugin(ISceneToolPlugin):
|
|
""" New Scene plugin """
|
|
```
|
|
|
|
The following methods must be implemented by the plugin:
|
|
|
|
* `on_selection_changed(selection)`: Called by the scene plugin whenever the selection is changed. The complete new selection is passed to the plugin.
|
|
* `on_node_selection_changed(node_selection)`: Same as above but a list of the scene nodes in the new selection is passed to the plugin.
|
|
* `on_frame_complete()`: This function is called when the current frame is complete. The plugin is given a chance to draw additional content at this point.
|
|
**Note:** This call is done from the rendering thread. The synchronous renderer object [^1] can be used from this location. The renderer matrix stack is automatically saved and restored around this call.
|
|
* `on_mouse_event(event, mouse, dt_frame)`: Called whenever a mouse event happens over the viewport.
|
|
|
|
[^1]: Available through the `engine.renderer` symbol.
|
|
|
|
## Mouse events
|
|
|
|
TODO
|