I have been having this issue for a long time, and no matter what answers on here I try I keep having an issue.
This is a previous question of mine that had no resolution to it JavaFX 3D PerspectiveCamera affects drag position of a node
(nor did the answers/links provided in the question)
Essentially I am trying to drag a node while keeping the mouse position at to the clicked position of the node while dragging.
The original thought was to do an event.getScreenX() or event.getSceneX() to get the initial position on mouseClicked, and then compare/update in the mouse dragged.
The issue is that when I zoom the camera in and out(camera.setTranslateZ()), for some reason the values will increase/decrease depending on the zoom, i.e., the node drags slower/stays with the mouse when the camera is zoomed out.
For what it's worth I also have scaled the main node by 10, which I think might have something to do with this as one of the examples did seem to break when the scale and/or camera were changed; however the example also doesn't work, with no scale.
Does anyone have any idea? It's extremely frustrating with how simple this task is, yet hard to actually accomplish. I would think that as the mouse would drag, regardless if it dragged 1 pixel with the mouse zoomed in, or 100 pixels with the mouse zoomed out that it wouldn't cause this issue, so I'm wondering if there is some sort of bug with this? Any thoughts are appreciated, thank you.
public class Move extends Application {
double x0,xDiff;
double y0,yDiff;
@Override
public void start(Stage primaryStage) {
Box b = new Box(100,100,1);
b.setLayoutX(0);
b.setLayoutY(0);
// b.setTranslateZ(20000);
Pane root = new Pane();
root.getChildren().add(b);
PhongMaterial p = new PhongMaterial();
p.setDiffuseColor(Color.RED);
b.setMaterial(p);
Scene scene = new Scene(root, 2000, 1250,true);
PerspectiveCamera camera = new PerspectiveCamera(true);
camera.setTranslateZ(-1000);
camera.setFarClip(2000);
scene.setCamera(camera);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
b.setOnMousePressed(event
->{
x0 = event.getSceneX();
y0 = event.getSceneY();
event.consume();
});
b.setOnMouseDragged(event
->{
xDiff = event.getSceneX() - x0;
yDiff = event.getSceneY() - y0;
b.setLayoutX(b.getLayoutX() + xDiff);
b.setLayoutY(b.getLayoutY() + yDiff);
x0 = event.getSceneX();
y0 = event.getSceneY();
});
primaryStage.setOnScroll(event
->{
if (event.getDeltaY() > 0)
{
camera.setTranslateZ(camera.getTranslateZ() + 45);
}
else
{
camera.setTranslateZ(camera.getTranslateZ() - 45);
}
});
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
