java - 如何将 JTS-Geometry 转换为 AWT-Shape？

Question

是否可以将 com.vividsolutions.jts.geom.Geometry(或其子类)转换为实现 java.awt.Shape 的类？我可以使用哪个库或方法来实现该目标？

Answer 1

另请查看 ShapeWriter由 JTS 库提供。我使用以下代码片段将 jts 几何对象转换为 awt 形状。

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;

import javax.swing.JFrame;
import javax.swing.JPanel;

import com.vividsolutions.jts.awt.ShapeWriter;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.LineString;
import com.vividsolutions.jts.geom.Polygon;

public class Paint extends JPanel{
    public void paint(Graphics g) {

        Coordinate[] coords  = new Coordinate[] {new Coordinate(400, 0),  new Coordinate(200, 200),  new Coordinate(400, 400), new Coordinate(600, 200), new Coordinate(400, 0) };
        Polygon polygon = new GeometryFactory().createPolygon(coords);

        LineString ls = new GeometryFactory().createLineString(new Coordinate[] {new Coordinate(20, 20),  new Coordinate(200, 20)});

        ShapeWriter sw = new ShapeWriter();
        Shape polyShape = sw.toShape(polygon);
        Shape linShape = sw.toShape(ls);

        ((Graphics2D) g).draw(polyShape);
        ((Graphics2D) g).draw(linShape);


    }
    public static void main(String[] args) {
        JFrame f = new JFrame();
        f.getContentPane().add(new Paint());
        f.setSize(700, 700);
        f.setVisible(true);
    }
}

编辑:结果看起来像这张图片