B4J Code Snippet A Rotating Globe

jkhazraji said:

Using the inline feature, the code displays a rotating globe with a diffuse map. It totally relies on the inline code without the
need for external libraries or references.
Code needs to be completed in some places by an attentive b4j programmer. I just left them blank for interaction
see demo:

B4X:

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("Layout1")
    Dim jform As JavaObject = MainForm
    Dim jStage As JavaObject
   '
   '..........................................
   Dim earthView As JavaObject=(Me).As(JavaObject).InitializeStatic("com.prosoft.jEarthView.main$EarthViewer")
   '..........................................
    MainForm.Show
End Sub

#if Java
import javafx.animation.*;
import javafx.scene.*;
import javafx.scene.image.Image;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.*;
import javafx.scene.shape.Sphere;
import javafx.scene.transform.Rotate;
//............................
import javafx.util.Duration;

public static class EarthViewer {

  private static final double EARTH_RADIUS  = 320;
  private static final double VIEWPORT_SIZE = 600;
  private static final double ROTATE_SECS   = 80;

  private static final double MAP_WIDTH  = 8192 / 2d;
  private static final double MAP_HEIGHT = 4092 / 2d;

  private static final String DIFFUSE_MAP ="https://planetpixelemporium.com/download/download.php?8081/earthmap10k.jpg";
         
  private static final String NORMAL_MAP = "";
  private static final String SPECULAR_MAP = "";

  private static Group buildScene() {
    Sphere earth = new Sphere(EARTH_RADIUS);
    earth.setTranslateX(VIEWPORT_SIZE / 2d);
    earth.setTranslateY(VIEWPORT_SIZE / 2d);

    PhongMaterial earthMaterial = new PhongMaterial();
    earthMaterial.setDiffuseMap(
      new Image(
        DIFFUSE_MAP,
        MAP_WIDTH,
        MAP_HEIGHT,
        true,
        true
      )
    );
    earthMaterial.setBumpMap(
      new Image(
        NORMAL_MAP,
        MAP_WIDTH,
        MAP_HEIGHT,
        true,
        true
      )
    );
    earthMaterial.setSpecularMap(
      new Image(
        SPECULAR_MAP,
        MAP_WIDTH,
        MAP_HEIGHT,
        true,
        true
      )
    );

    earth.setMaterial(
        earthMaterial
    );

    return new Group(earth);
  }

 
  public void earthview(Stage stage) {
    Group group = buildScene();

    Scene scene = new Scene(
      new StackPane(group),
      VIEWPORT_SIZE, VIEWPORT_SIZE,
      true,
      SceneAntialiasing.BALANCED
    );

    scene.setFill(Color.rgb(10, 10, 40));

    scene.setCamera(new PerspectiveCamera());

    stage.setScene(scene);
   //...................................

   //....................................

    rotateAroundYAxis(group).play();
  }

  private static RotateTransition rotateAroundYAxis(Node node) {
    RotateTransition rotate = new RotateTransition(
      Duration.seconds(ROTATE_SECS),
      node
    );
    rotate.setAxis(Rotate.Y_AXIS);
    rotate.setFromAngle(360);
    rotate.setToAngle(0);
    rotate.setInterpolator(Interpolator.LINEAR);
    rotate.setCycleCount(RotateTransition.INDEFINITE);

    return rotate;
  }

}

#End If

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Beja said:

Hi jkhazraji,
Looks intersting.. would you post the .b4j project file in zip format?

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jkhazraji said:

With pleasure

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Beja said:

awesome! Thanks so much.

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Beja said:

Hi jkhazraji,
Looks intersting.. would you post the .b4j project file in zip format?

Click to expand...