java形成3d波浪线图

要在Java中生成3D波浪线图，可以使用Java 3D API或JavaFX 3D API。

使用Java 3D API，您需要定义一个包含波浪线的Shape3D对象，然后将其添加到场景中。以下是一个简单的示例：

import java.awt.Color;
import javax.media.j3d.Appearance;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.ColoringAttributes;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Point3f;

public class Wave3D extends BranchGroup {
    public Wave3D() {
        // Create a shape with a wave pattern
        Shape3D shape = createWaveShape();

        // Set the appearance of the shape
        Appearance app = new Appearance();
        ColoringAttributes ca = new ColoringAttributes(new Color(0, 50, 150), ColoringAttributes.SHADE_FLAT);
        app.setColoringAttributes(ca);
        shape.setAppearance(app);

        // Create a transform group to apply a rotation to the shape
        TransformGroup tg = new TransformGroup();
        tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        tg.addChild(shape);

        // Add the transform group to this branch group
        addChild(tg);
    }

    private Shape3D createWaveShape() {
        int numPoints = 100;
        float width = 5.0f;
        float height = 2.0f;
        Point3f[] points = new Point3f[numPoints];
        float[] coords = new float[numPoints * 3];

        for (int i = 0; i < numPoints; i++) {
            float x = ((float) i / (float) numPoints) * width;
            float y = (float) Math.sin(x * Math.PI) * height;
            float z = 0.0f;
            points[i] = new Point3f(x, y, z);
            coords[i * 3] = x;
            coords[i * 3 + 1] = y;
            coords[i * 3 + 2] = z;
        }

        Shape3D shape = new Shape3D();
        shape.setGeometry(createLineStrip(numPoints, coords));
        return shape;
    }

    private LineStripArray createLineStrip(int numPoints, float[] coords) {
        LineStripArray lines = new LineStripArray(numPoints, LineStripArray.COORDINATES);
        lines.setCoordinates(0, coords);
        return lines;
    }
}

使用JavaFX 3D API，您可以创建一个3D曲面来表示波浪线。以下是一个简单的示例：

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.MeshView;
import javafx.scene.shape.TriangleMesh;
import javafx.stage.Stage;

public class Wave3D extends Application {
    private static final int NUM_POINTS = 100;
    private static final float WIDTH = 5.0f;
    private static final float HEIGHT = 2.0f;

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) {
        TriangleMesh mesh = createWaveMesh();
        MeshView meshView = new MeshView(mesh);
        meshView.setDrawMode(MeshView.DrawMode.LINE);
        meshView.setMaterial(new javafx.scene.paint.PhongMaterial(Color.BLUE));

        Group root = new Group(meshView);
        Scene scene = new Scene(root, 600, 400, true);
        scene.setFill(Color.WHITE);

        stage.setScene(scene);
        stage.show();
    }

    private TriangleMesh createWaveMesh() {
        float[] points = new float[NUM_POINTS * 3];
        int[] faces = new int[(NUM_POINTS - 1) * 6];
        int pointIndex = 0;
        int faceIndex = 0;

        for (int i = 0; i < NUM_POINTS; i++) {
            float x = ((float) i / (float) NUM_POINTS) * WIDTH;
            float y = (float) Math.sin(x * Math.PI) * HEIGHT;
            float z = 0.0f;
            points[pointIndex++] = x;
            points[pointIndex++] = y;
            points[pointIndex++] = z;

            if (i < NUM_POINTS - 1) {
                faces[faceIndex++] = i;
                faces[faceIndex++] = i + 1;
                faces[faceIndex++] = i + NUM_POINTS;
                faces[faceIndex++] = i + 1;
                faces[faceIndex++] = i + NUM_POINTS + 1;
                faces[faceIndex++] = i + NUM_POINTS;
            }
        }

        TriangleMesh mesh = new TriangleMesh();
        mesh.getPoints().setAll(points);
        mesh.getTexCoords().setAll(0, 0);
        mesh.getFaces().setAll(faces);
        return mesh;
    }
}