看起来这也许可以帮助任何事情：
https://pre.google.com/p/box2d-editor/issues/detail?id=25
https://gist.github.com/zudov/5566204
package aurelienribon.bodyeditor;import com.badlogic.gdx.files.FileHandle;import com.badlogic.gdx.math.Vector2;import com.badlogic.gdx.physics.box2d.Body;import com.badlogic.gdx.physics.box2d.CircleShape;import com.badlogic.gdx.physics.box2d.FixtureDef;import com.badlogic.gdx.physics.box2d.PolygonShape;import com.badlogic.gdx.utils.Array;import com.badlogic.gdx.utils.JsonReader;import com.badlogic.gdx.utils.JsonValue;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class BodyEditorLoader { // Model private final Model model; // Reusable stuff private final List<Vector2> vectorPool = new ArrayList<Vector2>(); private final PolygonShape polygonShape = new PolygonShape(); private final CircleShape circleShape = new CircleShape(); private final Vector2 vec = new Vector2(); // ------------------------------------------------------------------------- // Ctors // ------------------------------------------------------------------------- public BodyEditorLoader(FileHandle file) { if (file == null) throw new NullPointerException("file is null"); model = readJson(file.readString()); } public BodyEditorLoader(String str) { if (str == null) throw new NullPointerException("str is null"); model = readJson(str); } // ------------------------------------------------------------------------- // Public API // ------------------------------------------------------------------------- public void attachFixture(Body body, String name, FixtureDef fd, float scale) { RigidBodyModel rbModel = model.rigidBodies.get(name); if (rbModel == null) throw new RuntimeException("Name '" + name + "' was not found."); Vector2 origin = vec.set(rbModel.origin).mul(scale); for (int i=0, n=rbModel.polygons.size(); i<n; i++) { PolygonModel polygon = rbModel.polygons.get(i); Vector2[] vertices = polygon.buffer; for (int ii=0, nn=vertices.length; ii<nn; ii++) { vertices[ii] = newVec().set(polygon.vertices.get(ii)).mul(scale); vertices[ii].sub(origin); } polygonShape.set(vertices); fd.shape = polygonShape; body.createFixture(fd); for (int ii=0, nn=vertices.length; ii<nn; ii++) { free(vertices[ii]); } } for (int i=0, n=rbModel.circles.size(); i<n; i++) { CircleModel circle = rbModel.circles.get(i); Vector2 center = newVec().set(circle.center).mul(scale); float radius = circle.radius * scale; circleShape.setPosition(center); circleShape.setRadius(radius); fd.shape = circleShape; body.createFixture(fd); free(center); } } public String getImagePath(String name) { RigidBodyModel rbModel = model.rigidBodies.get(name); if (rbModel == null) throw new RuntimeException("Name '" + name + "' was not found."); return rbModel.imagePath; } public Vector2 getOrigin(String name, float scale) { RigidBodyModel rbModel = model.rigidBodies.get(name); if (rbModel == null) throw new RuntimeException("Name '" + name + "' was not found."); return vec.set(rbModel.origin).scl(scale);} public Model getInternalModel() { return model; } // ------------------------------------------------------------------------- // Json Models // ------------------------------------------------------------------------- public static class Model { public final Map<String, RigidBodyModel> rigidBodies = new HashMap<String, RigidBodyModel>(); } public static class RigidBodyModel { public String name; public String imagePath; public final Vector2 origin = new Vector2(); public final List<PolygonModel> polygons = new ArrayList<PolygonModel>(); public final List<CircleModel> circles = new ArrayList<CircleModel>(); } public static class PolygonModel { public final List<Vector2> vertices = new ArrayList<Vector2>(); private Vector2[] buffer; // used to avoid allocation in attachFixture() } public static class CircleModel { public final Vector2 center = new Vector2(); public float radius; } // ------------------------------------------------------------------------- // Json reading process // ------------------------------------------------------------------------- private Model readJson(String str) { Model m = new Model(); JsonValue map = new JsonReader().parse(str); JsonValue bodyElem = map.getChild("rigidBodies"); for (; bodyElem != null; bodyElem = bodyElem.next()) { RigidBodyModel rbModel = readRigidBody(bodyElem); m.rigidBodies.put(rbModel.name, rbModel); } return m; } private RigidBodyModel readRigidBody(JsonValue bodyElem) { RigidBodyModel rbModel = new RigidBodyModel(); rbModel.name = bodyElem.getString("name"); rbModel.imagePath = bodyElem.getString("imagePath"); JsonValue originElem = bodyElem.get("origin"); rbModel.origin.x = originElem.getFloat("x"); rbModel.origin.y = originElem.getFloat("y"); // polygons JsonValue polygonsElem = bodyElem.getChild("polygons"); for (; polygonsElem != null ;polygonsElem = polygonsElem.next()){ PolygonModel polygon = new PolygonModel(); rbModel.polygons.add(polygon); JsonValue vertexElem = polygonsElem.child(); for (; vertexElem != null; vertexElem = vertexElem.next()) { float x = vertexElem.getFloat("x"); float y = vertexElem.getFloat("y"); polygon.vertices.add(new Vector2(x, y)); } polygon.buffer = new Vector2[polygon.vertices.size()]; } // circles JsonValue circleElem = bodyElem.getChild("circles"); for (; circleElem != null; circleElem = circleElem.next()) { CircleModel circle = new CircleModel(); rbModel.circles.add(circle); circle.center.x = circleElem.getFloat("cx"); circle.center.y = circleElem.getFloat("cy"); circle.radius = circleElem.getFloat("r"); } return rbModel; } // ------------------------------------------------------------------------- // Helpers // ------------------------------------------------------------------------- private Vector2 newVec() { return vectorPool.isEmpty() ? new Vector2() : vectorPool.remove(0); } private void free(Vector2 v) { vectorPool.add(v); }}这段代码在GitHub上，但是由于用户帐户更改而被reporsitorio删除了，我将其张贴在这里，因此它们不依赖于帐户Git（代码也有所更改）。
