如何在JavaFX 8中從STL創建3D形狀？

Question

我有STLFile類，它返回兩個數組：一個是法線座標，另一個是頂點座標。所以現在我想用我的JavaFX應用程序中的這些座標創建三維形狀。問題是，我怎麼能沒有紋理做到這一點。使用官方指南，我使用座標創建了TriangleMesh並將其添加到MeshView。但不幸的是，現場沒有出現。那麼任何人都可以向我解釋如何做到這一點，因爲官方指南中的描述不能稱得上足夠？

Answer 1

您可以使用Interactive Mesh JavaFX STL Model Importer加載STL文件。

JewelViewer.java

import com.interactivemesh.jfx.importer.stl.StlMeshImporter; 
import javafx.application.Application; 
import javafx.scene.*; 
import javafx.scene.paint.Color; 
import javafx.scene.paint.PhongMaterial; 
import javafx.scene.shape.Mesh; 
import javafx.scene.shape.MeshView; 
import javafx.scene.transform.Rotate; 
import javafx.stage.Stage; 

import java.io.File; 

public class JewelViewer extends Application { 

    private static final String MESH_FILENAME = 
    "/Users/lilyshard/Downloads/Perfect Diamond/Perfect Diamond.STL"; 

    private static final double MODEL_SCALE_FACTOR = 400; 
    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 static final Color lightColor = Color.rgb(244, 255, 250); 
    private static final Color jewelColor = Color.rgb(0, 190, 222); 

    private Group root; 
    private PointLight pointLight; 

    static MeshView[] loadMeshViews() { 
    File file = new File(MESH_FILENAME); 
    StlMeshImporter importer = new StlMeshImporter(); 
    importer.read(file); 
    Mesh mesh = importer.getImport(); 

    return new MeshView[] { new MeshView(mesh) }; 
    } 

    private Group buildScene() { 
    MeshView[] meshViews = loadMeshViews(); 
    for (int i = 0; i < meshViews.length; i++) { 
     meshViews[i].setTranslateX(VIEWPORT_SIZE/2 + MODEL_X_OFFSET); 
     meshViews[i].setTranslateY(VIEWPORT_SIZE/2 + MODEL_Y_OFFSET); 
     meshViews[i].setTranslateZ(VIEWPORT_SIZE/2); 
     meshViews[i].setScaleX(MODEL_SCALE_FACTOR); 
     meshViews[i].setScaleY(MODEL_SCALE_FACTOR); 
     meshViews[i].setScaleZ(MODEL_SCALE_FACTOR); 

     PhongMaterial sample = new PhongMaterial(jewelColor); 
     sample.setSpecularColor(lightColor); 
     sample.setSpecularPower(16); 
     meshViews[i].setMaterial(sample); 

     meshViews[i].getTransforms().setAll(new Rotate(38, Rotate.Z_AXIS), new Rotate(20, Rotate.X_AXIS)); 
    } 

    pointLight = new PointLight(lightColor); 
    pointLight.setTranslateX(VIEWPORT_SIZE*3/4); 
    pointLight.setTranslateY(VIEWPORT_SIZE/2); 
    pointLight.setTranslateZ(VIEWPORT_SIZE/2); 
    PointLight pointLight2 = new PointLight(lightColor); 
    pointLight2.setTranslateX(VIEWPORT_SIZE*1/4); 
    pointLight2.setTranslateY(VIEWPORT_SIZE*3/4); 
    pointLight2.setTranslateZ(VIEWPORT_SIZE*3/4); 
    PointLight pointLight3 = new PointLight(lightColor); 
    pointLight3.setTranslateX(VIEWPORT_SIZE*5/8); 
    pointLight3.setTranslateY(VIEWPORT_SIZE/2); 
    pointLight3.setTranslateZ(0); 

    Color ambientColor = Color.rgb(80, 80, 80, 0); 
    AmbientLight ambient = new AmbientLight(ambientColor); 

    root = new Group(meshViews); 
    root.getChildren().add(pointLight); 
    root.getChildren().add(pointLight2); 
    root.getChildren().add(pointLight3); 
    root.getChildren().add(ambient); 

    return root; 
    } 

    private PerspectiveCamera addCamera(Scene scene) { 
    PerspectiveCamera perspectiveCamera = new PerspectiveCamera(); 
    System.out.println("Near Clip: " + perspectiveCamera.getNearClip()); 
    System.out.println("Far Clip: " + perspectiveCamera.getFarClip()); 
    System.out.println("FOV:  " + perspectiveCamera.getFieldOfView()); 

    scene.setCamera(perspectiveCamera); 
    return perspectiveCamera; 
    } 

    @Override 
    public void start(Stage primaryStage) { 
    Group group = buildScene(); 
    group.setScaleX(2); 
    group.setScaleY(2); 
    group.setScaleZ(2); 
    group.setTranslateX(50); 
    group.setTranslateY(50); 

    Scene scene = new Scene(group, VIEWPORT_SIZE, VIEWPORT_SIZE, true); 
    scene.setFill(Color.rgb(10, 10, 40)); 
    addCamera(scene); 
    primaryStage.setTitle("Jewel Viewer"); 
    primaryStage.setScene(scene); 
    primaryStage.show(); 
    } 

    public static void main(String[] args) { 
    System.setProperty("prism.dirtyopts", "false"); 
    launch(args); 
    } 
} 

STL源模型信息

-- Model information -- 

Model Name : Perfect Diamond 
Author : Scott Allen 
Publisher : mtgtopdeck 

You can view this model here : 
http://www.3dvia.com/content/024BE6380A1C2E00 
More models about this author : 
http://www.3dvia.com/mtgtopdeck 


-- Attached license -- 

A license is attached to the Perfect Diamond model and all related media. 
You must agree with this licence before using the enclosed media. 

License : Attribution-NonCommercial 2.5 
Detailed license : http://creativecommons.org/licenses/by-nc/2.5/ 

The licenses used by 3dvia are based on Creative Commons Licenses. 
More info: http://creativecommons.org/about/licenses/meet-the-licenses