java


3D Scatter Chart JavaFX: How to show legend and measures near axis


Looking this post, I've tried to implement in javaFX, with many difficulties, a Scatter Chart 3D where the grid is my x,y and z axis and the spheres are my points.
How Can I put a legend, axis labels and the range numbers along the axis? I can use only javaFX without external library.
I'm desperate.. I'm trying for days..without results
Please:help me
Thanks.
Code
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.PerspectiveCamera;
import javafx.scene.Scene;
import javafx.scene.SceneAntialiasing;
import javafx.scene.input.ScrollEvent;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.paint.Paint;
import javafx.scene.paint.PhongMaterial;
import javafx.scene.shape.Line;
import javafx.scene.shape.Rectangle;
import javafx.scene.shape.Sphere;
import javafx.scene.transform.Rotate;
import javafx.stage.Stage;
public class GraphingData extends Application {
private static Random rnd = new Random();
// size of graph
int graphSize = 400;
// variables for mouse interaction
private double mousePosX, mousePosY;
private double mouseOldX, mouseOldY;
private final Rotate rotateX = new Rotate(150, Rotate.X_AXIS);
private final Rotate rotateY = new Rotate(120, Rotate.Y_AXIS);
#Override
public void start(Stage primaryStage) {
// create axis walls
Group grid = createGrid(graphSize);
// initial cube rotation
grid.getTransforms().addAll(rotateX, rotateY);
// add objects to scene
StackPane root = new StackPane();
root.getChildren().add(grid);
root.setStyle( "-fx-border-color: red;");
// create bars
double gridSizeHalf = graphSize / 2;
double size = 30;
//Drawing a Sphere
Sphere sphere = new Sphere();
//Setting the properties of the Sphere
sphere.setRadius(10.0);
sphere.setTranslateX(-50);
sphere.setTranslateY(-50);
//Preparing the phong material of type specular color
PhongMaterial material6 = new PhongMaterial();
//setting the specular color map to the material
material6.setDiffuseColor(Color.GREEN);
sphere.setMaterial(material6);
grid.getChildren().addAll(sphere);
// scene
Scene scene = new Scene(root, 1600, 900, true, SceneAntialiasing.BALANCED);
scene.setCamera(new PerspectiveCamera());
scene.setOnMousePressed(me -> {
mouseOldX = me.getSceneX();
mouseOldY = me.getSceneY();
});
scene.setOnMouseDragged(me -> {
mousePosX = me.getSceneX();
mousePosY = me.getSceneY();
rotateX.setAngle(rotateX.getAngle() - (mousePosY - mouseOldY));
rotateY.setAngle(rotateY.getAngle() + (mousePosX - mouseOldX));
mouseOldX = mousePosX;
mouseOldY = mousePosY;
});
makeZoomable(root);
primaryStage.setResizable(false);
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* Axis wall
*/
public static class Axis extends Pane {
Rectangle wall;
public Axis(double size) {
// wall
// first the wall, then the lines => overlapping of lines over walls
// works
wall = new Rectangle(size, size);
getChildren().add(wall);
// grid
double zTranslate = 0;
double lineWidth = 1.0;
Color gridColor = Color.RED;
for (int y = 0; y <= size; y += size / 10) {
Line line = new Line(0, 0, size, 0);
line.setStroke(gridColor);
line.setFill(gridColor);
line.setTranslateY(y);
line.setTranslateZ(zTranslate);
line.setStrokeWidth(lineWidth);
getChildren().addAll(line);
}
for (int x = 0; x <= size; x += size / 10) {
Line line = new Line(0, 0, 0, size);
line.setStroke(gridColor);
line.setFill(gridColor);
line.setTranslateX(x);
line.setTranslateZ(zTranslate);
line.setStrokeWidth(lineWidth);
getChildren().addAll(line);
}
}
public void setFill(Paint paint) {
wall.setFill(paint);
}
}
public void makeZoomable(StackPane control) {
final double MAX_SCALE = 20.0;
final double MIN_SCALE = 0.1;
control.addEventFilter(ScrollEvent.ANY, new EventHandler<ScrollEvent>() {
#Override
public void handle(ScrollEvent event) {
double delta = 1.2;
double scale = control.getScaleX();
if (event.getDeltaY() < 0) {
scale /= delta;
} else {
scale *= delta;
}
scale = clamp(scale, MIN_SCALE, MAX_SCALE);
control.setScaleX(scale);
control.setScaleY(scale);
event.consume();
}
});
}
/**
* Create axis walls
*
* #param size
* #return
*/
private Group createGrid(int size) {
Group cube = new Group();
// size of the cube
Color color = Color.LIGHTGRAY;
List<Axis> cubeFaces = new ArrayList<>();
Axis r;
// back face
r = new Axis(size);
r.setFill(color.deriveColor(0.0, 1.0, (1 - 0.5 * 1), 1.0));
r.setTranslateX(-0.5 * size);
r.setTranslateY(-0.5 * size);
r.setTranslateZ(0.5 * size);
cubeFaces.add(r);
// bottom face
r = new Axis(size);
r.setFill(color.deriveColor(0.0, 1.0, (1 - 0.4 * 1), 1.0));
r.setTranslateX(-0.5 * size);
r.setTranslateY(0);
r.setRotationAxis(Rotate.X_AXIS);
r.setRotate(90);
cubeFaces.add(r);
// right face
r = new Axis(size);
r.setFill(color.deriveColor(0.0, 1.0, (1 - 0.3 * 1), 1.0));
r.setTranslateX(-1 * size);
r.setTranslateY(-0.5 * size);
r.setRotationAxis(Rotate.Y_AXIS);
r.setRotate(90);
// cubeFaces.add( r);
// left face
r = new Axis(size);
r.setFill(color.deriveColor(0.0, 1.0, (1 - 0.2 * 1), 1.0));
r.setTranslateX(0);
r.setTranslateY(-0.5 * size);
r.setRotationAxis(Rotate.Y_AXIS);
r.setRotate(90);
cubeFaces.add(r);
// top face
r = new Axis(size);
r.setFill(color.deriveColor(0.0, 1.0, (1 - 0.1 * 1), 1.0));
r.setTranslateX(-0.5 * size);
r.setTranslateY(-1 * size);
r.setRotationAxis(Rotate.X_AXIS);
r.setRotate(90);
// cubeFaces.add( r);
// front face
r = new Axis(size);
r.setFill(color.deriveColor(0.0, 1.0, (1 - 0.1 * 1), 1.0));
r.setTranslateX(-0.5 * size);
r.setTranslateY(-0.5 * size);
r.setTranslateZ(-0.5 * size);
// cubeFaces.add( r);
cube.getChildren().addAll(cubeFaces);
return cube;
}
public static double normalizeValue(double value, double min, double max, double newMin, double newMax) {
return (value - min) * (newMax - newMin) / (max - min) + newMin;
}
public static double clamp(double value, double min, double max) {
if (Double.compare(value, min) < 0)
return min;
if (Double.compare(value, max) > 0)
return max;
return value;
}
public static Color randomColor() {
return Color.rgb(rnd.nextInt(255), rnd.nextInt(255), rnd.nextInt(255));
}
public static void main(String[] args) {
launch(args);
}
}
Here's a basic idea to create some measures on the axes. It is not production-ready but should give you enough to start with.
private Group createGrid(int size) {
// existing code omitted...
cube.getChildren().addAll(cubeFaces);
double gridSizeHalf = size / 2;
double labelOffset = 30 ;
double labelPos = gridSizeHalf - labelOffset ;
for (double coord = -gridSizeHalf ; coord < gridSizeHalf ; coord+=50) {
Text xLabel = new Text(coord, labelPos, String.format("%.0f", coord));
xLabel.setTranslateZ(labelPos);
xLabel.setScaleX(-1);
Text yLabel = new Text(labelPos, coord, String.format("%.0f", coord));
yLabel.setTranslateZ(labelPos);
yLabel.setScaleX(-1);
Text zLabel = new Text(labelPos, labelPos, String.format("%.0f", coord));
zLabel.setTranslateZ(coord);
cube.getChildren().addAll(xLabel, yLabel, zLabel);
zLabel.setScaleX(-1);
}
return cube;
}
I would just place a legend outside the graph, which would just be a 2D grid pane not rotating...

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