在Javafx中围绕中心旋转对象
我的应用程序使用交互式网格库读取obj文件,并将其保存在meshview中。我想要的是围绕对象的中心旋转对象 现在,我的代码显示对象,但当我旋转它时,它会围绕某个点旋转,从而导致对象超出窗口。我想绕着物体的中心旋转。我知道我必须将物体平移到原点,然后旋转,然后再平移,但我不知道怎么做 这是我的代码:在Javafx中围绕中心旋转对象,javafx,3d,javafx-8,javafx-3d,Javafx,3d,Javafx 8,Javafx 3d,我的应用程序使用交互式网格库读取obj文件,并将其保存在meshview中。我想要的是围绕对象的中心旋转对象 现在,我的代码显示对象,但当我旋转它时,它会围绕某个点旋转,从而导致对象超出窗口。我想绕着物体的中心旋转。我知道我必须将物体平移到原点,然后旋转,然后再平移,但我不知道怎么做 这是我的代码: public class JavaFx3DObj extends Application { private static final String Filename = "mode
public class JavaFx3DObj extends Application
{
private static final String Filename = "model/bunny.obj";
private static final double MODEL_SCALE_FACTOR = 10;
private static final double MODEL_X_OFFSET = 0; // standard
private static final double MODEL_Y_OFFSET = 0; // standard
private static final int VIEWPORT_SIZE = 800;
private double mouseOldX, mouseOldY = 0;
private Rotate rotateX = new Rotate(0, Rotate.X_AXIS);
private Rotate rotateY = new Rotate(0, Rotate.Y_AXIS);
private Rotate rotateZ = new Rotate(0, Rotate.Z_AXIS);
private Group root;
private Group buildScene()
{
File file = new File(Filename);
ObjModelImporter importer = new ObjModelImporter();
importer.read(file);
MeshView[] meshViews = importer.getImport();
importer.close();
// To make the object appear in the middle of the scene
for (MeshView meshView : meshViews)
{
meshView.setTranslateX(VIEWPORT_SIZE / 2 + MODEL_X_OFFSET);
meshView.setTranslateY(VIEWPORT_SIZE / 2 + MODEL_Y_OFFSET);
meshView.setTranslateZ(VIEWPORT_SIZE / 2);
meshView.setScaleX(MODEL_SCALE_FACTOR);
meshView.setScaleY(MODEL_SCALE_FACTOR);
meshView.setScaleZ(MODEL_SCALE_FACTOR);
}
root = new Group(meshViews);
return root;
}
@Override
public void start(Stage stage) throws Exception
{
Group root = buildScene();
PerspectiveCamera camera = new PerspectiveCamera(false);
camera.setTranslateX(100);
camera.setTranslateY(0);
camera.setTranslateZ(100);
camera.getTransforms().addAll (rotateX, rotateY, new Translate(0, 0, 400));
root.setRotationAxis(Rotate.Y_AXIS);
root.setRotate(200);
Scene scene = new Scene(root, 900, 500, true);
scene.setFill(Color.rgb(10, 10, 40));
scene.setCamera(camera);
scene.setOnMousePressed(event ->
{
mouseOldX = event.getSceneX();
mouseOldY = event.getSceneY();
});
scene.setOnMouseDragged(event ->
{
rotateX.setAngle(rotateX.getAngle() - (event.getSceneY() - mouseOldY));
rotateY.setAngle(rotateY.getAngle() + (event.getSceneX() - mouseOldX));
mouseOldX = event.getSceneX();
mouseOldY = event.getSceneY();
});
stage.setTitle("JavaFx3DObj");
stage.setScene(scene);
stage.show();
}
public static void main(String[] args)
{
launch(args);
}
}
您需要做的是在应用旋转之前设置旋转轴。 因此,您的代码如下所示:
public class JavaFx3DObj extends Application {
private static final String Filename = "model/bunny.obj";
private static final double MODEL_SCALE_FACTOR = 10;
private static final double MODEL_X_OFFSET = 0; // standard
private static final double MODEL_Y_OFFSET = 0; // standard
private static final int VIEWPORT_SIZE = 800;
private double mouseOldX, mouseOldY = 0;
private Rotate rotateX = new Rotate(0, Rotate.X_AXIS);
private Rotate rotateY = new Rotate(0, Rotate.Y_AXIS);
private Rotate rotateZ = new Rotate(0, Rotate.Z_AXIS);
private Group root;
private Group buildScene() {
File file = new File(Filename);
ObjModelImporter importer = new ObjModelImporter();
importer.read(file);
MeshView[] meshViews = importer.getImport();
importer.close();
// To make the object appear in the middle of the scene
for (MeshView meshView : meshViews) {
meshView.setTranslateX(VIEWPORT_SIZE / 2 + MODEL_X_OFFSET);
meshView.setTranslateY(VIEWPORT_SIZE / 2 + MODEL_Y_OFFSET);
meshView.setTranslateZ(VIEWPORT_SIZE / 2);
meshView.setScaleX(MODEL_SCALE_FACTOR);
meshView.setScaleY(MODEL_SCALE_FACTOR);
meshView.setScaleZ(MODEL_SCALE_FACTOR);
}
root = new Group(meshViews);
return root;
}
@Override
public void start(Stage stage) throws Exception {
Group root = buildScene();
PerspectiveCamera camera = new PerspectiveCamera(false);
camera.setTranslateX(100);
camera.setTranslateY(0);
camera.setTranslateZ(100);
camera.getTransforms().addAll (rotateX, rotateY, new Translate(0, 0, 400));
root.setRotationAxis(Rotate.Y_AXIS);
root.setRotate(200);
Scene scene = new Scene(root, 900, 500, true);
scene.setFill(Color.rgb(10, 10, 40));
scene.setCamera(camera);
//################ Set pivot points ################\\
rotateX.setPivotX(VIEWPORT_SIZE / 2 + MODEL_X_OFFSET);
rotateX.setPivotY(VIEWPORT_SIZE / 2 + MODEL_Y_OFFSET);
rotateX.setPivotZ(VIEWPORT_SIZE / 2);
rotateY.setPivotX(VIEWPORT_SIZE / 2 + MODEL_X_OFFSET);
rotateY.setPivotY(VIEWPORT_SIZE / 2 + MODEL_Y_OFFSET);
rotateY.setPivotZ(VIEWPORT_SIZE / 2);
rotateZ.setPivotX(VIEWPORT_SIZE / 2 + MODEL_X_OFFSET);
rotateZ.setPivotY(VIEWPORT_SIZE / 2 + MODEL_Y_OFFSET);
rotateZ.setPivotZ(VIEWPORT_SIZE / 2);
//################ End pivot points ################\\
scene.setOnMousePressed(event -> {
mouseOldX = event.getSceneX();
mouseOldY = event.getSceneY();
});
scene.setOnMouseDragged(event -> {
rotateX.setAngle(rotateX.getAngle() - (event.getSceneY() - mouseOldY));
rotateY.setAngle(rotateY.getAngle() + (event.getSceneX() - mouseOldX));
mouseOldX = event.getSceneX();
mouseOldY = event.getSceneY();
});
stage.setTitle("JavaFx3DObj");
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
我只能用一个立方体来测试它,因为我没有ObjLoader/ObjFile,但这应该允许你围绕一个点旋转
小心。如果平移对象,必须将轴点设置到新位置。需要做的是在应用旋转之前设置旋转轴。 因此,您的代码如下所示:
public class JavaFx3DObj extends Application {
private static final String Filename = "model/bunny.obj";
private static final double MODEL_SCALE_FACTOR = 10;
private static final double MODEL_X_OFFSET = 0; // standard
private static final double MODEL_Y_OFFSET = 0; // standard
private static final int VIEWPORT_SIZE = 800;
private double mouseOldX, mouseOldY = 0;
private Rotate rotateX = new Rotate(0, Rotate.X_AXIS);
private Rotate rotateY = new Rotate(0, Rotate.Y_AXIS);
private Rotate rotateZ = new Rotate(0, Rotate.Z_AXIS);
private Group root;
private Group buildScene() {
File file = new File(Filename);
ObjModelImporter importer = new ObjModelImporter();
importer.read(file);
MeshView[] meshViews = importer.getImport();
importer.close();
// To make the object appear in the middle of the scene
for (MeshView meshView : meshViews) {
meshView.setTranslateX(VIEWPORT_SIZE / 2 + MODEL_X_OFFSET);
meshView.setTranslateY(VIEWPORT_SIZE / 2 + MODEL_Y_OFFSET);
meshView.setTranslateZ(VIEWPORT_SIZE / 2);
meshView.setScaleX(MODEL_SCALE_FACTOR);
meshView.setScaleY(MODEL_SCALE_FACTOR);
meshView.setScaleZ(MODEL_SCALE_FACTOR);
}
root = new Group(meshViews);
return root;
}
@Override
public void start(Stage stage) throws Exception {
Group root = buildScene();
PerspectiveCamera camera = new PerspectiveCamera(false);
camera.setTranslateX(100);
camera.setTranslateY(0);
camera.setTranslateZ(100);
camera.getTransforms().addAll (rotateX, rotateY, new Translate(0, 0, 400));
root.setRotationAxis(Rotate.Y_AXIS);
root.setRotate(200);
Scene scene = new Scene(root, 900, 500, true);
scene.setFill(Color.rgb(10, 10, 40));
scene.setCamera(camera);
//################ Set pivot points ################\\
rotateX.setPivotX(VIEWPORT_SIZE / 2 + MODEL_X_OFFSET);
rotateX.setPivotY(VIEWPORT_SIZE / 2 + MODEL_Y_OFFSET);
rotateX.setPivotZ(VIEWPORT_SIZE / 2);
rotateY.setPivotX(VIEWPORT_SIZE / 2 + MODEL_X_OFFSET);
rotateY.setPivotY(VIEWPORT_SIZE / 2 + MODEL_Y_OFFSET);
rotateY.setPivotZ(VIEWPORT_SIZE / 2);
rotateZ.setPivotX(VIEWPORT_SIZE / 2 + MODEL_X_OFFSET);
rotateZ.setPivotY(VIEWPORT_SIZE / 2 + MODEL_Y_OFFSET);
rotateZ.setPivotZ(VIEWPORT_SIZE / 2);
//################ End pivot points ################\\
scene.setOnMousePressed(event -> {
mouseOldX = event.getSceneX();
mouseOldY = event.getSceneY();
});
scene.setOnMouseDragged(event -> {
rotateX.setAngle(rotateX.getAngle() - (event.getSceneY() - mouseOldY));
rotateY.setAngle(rotateY.getAngle() + (event.getSceneX() - mouseOldX));
mouseOldX = event.getSceneX();
mouseOldY = event.getSceneY();
});
stage.setTitle("JavaFx3DObj");
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
我只能用一个立方体来测试它,因为我没有ObjLoader/ObjFile,但这应该允许你围绕一个点旋转
小心。如果平移对象,则必须将轴点设置到新位置。请提供一个示例,您可以在
旋转
对象上设置轴坐标,从而定义要围绕哪个点旋转。您应该将对象中心设置为轴心。@Jhonny007您可以编写一个简单的代码吗?请看下面。您可以在Rotate
对象上设置轴心坐标,从而定义您要围绕哪个点旋转。您应该将对象中心设置为轴心。@Jhonny007您能写一个简单的代码吗?请看下面的内容。我非常感谢您的回答和回复。非常感谢您的回复。我非常感谢您的回答和回复。非常感谢您的回复。