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身体狂热

下午好，亲爱的读者！ 我，一个Java初学者，很长一段时间都无法适应Box2D库。 首先，由于它是为C ++编写的，并且没有文档，而且我不知道C语法。 其次，由于有关该库的详细课程仅可作为libGDX的扩展使用。 经过几周的艰苦奋斗，我终于能够理解如何使用该库，在本文中，我将对其进行讨论（并进行展示）。

我在Eclipse中工作，本文将与此开发环境相关联。 首先，下载libGDX收集器并进行标准构建。 我们需要扩展名为Box2D的桌面应用程序。 然后转到Eclipse，单击文件→导入→Gradle→Gradle项目，然后指定程序集的路径。

这是一张照片，显示我的样子。 我将带有Constants类的Utils包添加到Core文件夹，该文件夹仅包含一个常数-每米的像素数。 这样一来，世界就不再庞大。

图片


这是来自com.mygdx.game.desktop的DesktopLauncher类的代码：

将此代码粘贴到类中，然后忽略它
package com.mygdx.game.desktop; import com.badlogic.gdx.backends.lwjgl.LwjglApplication; import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration; import com.mygdx.game.MyGdxGame; public class DesktopLauncher { public static void main(String[] arg) { LwjglApplicationConfiguration config = new LwjglApplicationConfiguration(); //   config.width = 720; //   config.height = 480; config.backgroundFPS = 60; config.foregroundFPS = 60; new LwjglApplication(new MyGdxGame(), config); } }


将有很多代码，因此我将其包含在扰流器中。 仅更改com.mygdx.game包中的MyGdxGame类。

因此，让我们尝试在我们的应用程序中做一个相当简单的事情。 球的路径从木板撞到墙壁上，并且它们飞散了。 像这样：

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理念1.保龄球
 package com.mygdx.game; import com.badlogic.gdx.ApplicationAdapter; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.Input.Keys; import com.badlogic.gdx.graphics.GL20; import com.badlogic.gdx.graphics.OrthographicCamera; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.graphics.g2d.SpriteBatch; import com.badlogic.gdx.math.Vector2; import com.badlogic.gdx.math.Vector3; import com.badlogic.gdx.physics.box2d.Body; import com.badlogic.gdx.physics.box2d.BodyDef; import com.badlogic.gdx.physics.box2d.Box2DDebugRenderer; import com.badlogic.gdx.physics.box2d.CircleShape; import com.badlogic.gdx.physics.box2d.PolygonShape; import com.badlogic.gdx.physics.box2d.World; import utils.Constants; public class MyGdxGame extends ApplicationAdapter { SpriteBatch batch; Texture img; private OrthographicCamera camera; private boolean DEBUG = false; private World world; private Body ball; private Body floor; private Body wall; private Body verticals; private Body horizontals; private Box2DDebugRenderer b2dr; //        public void create() { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); camera = new OrthographicCamera(); camera.setToOrtho(false, w / 2, h / 2); world = new World(new Vector2(0, -9.8f), false); //      b2dr = new Box2DDebugRenderer(); //    ball = createPlayer(); //   "",     floor = createfloor(); //    verticals = createverticals(80, 80); verticals = createverticals(100, 80); verticals = createverticals(120, 80); verticals = createverticals(90, 111); verticals = createverticals(110, 111); verticals = createverticals(100, 141); horizontals = createhorizontals(85, 95); horizontals = createhorizontals(115, 95); horizontals = createhorizontals(100, 126); //   - wall = createwall(430, 170); wall = createwall(-430, 170); } public void render() { update(Gdx.graphics.getDeltaTime()); //    Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); b2dr.render(world, camera.combined.scl(Constants.PPM)); } public void resize(int width, int height) { camera.setToOrtho(false, width / 2, height / 2); } public void dispose() { world.dispose(); b2dr.dispose(); } //     public void update(float delta) { world.step(1 / 60f, 6, 2); inputUpdate(delta); cameraUpdate(delta); } //     public void inputUpdate(float delta) { int HF = 0; if (Gdx.input.isKeyPressed(Keys.SPACE)) { HF = 5; } ball.setLinearVelocity(HF * 5, ball.getLinearVelocity().y); } //      public void cameraUpdate(float delta) { Vector3 position = camera.position; position.x = ball.getPosition().x * Constants.PPM; position.y = ball.getPosition().y * Constants.PPM; camera.position.set(position); camera.update(); } //  ,     ,   , // ,  . //     public Body createPlayer() { Body pBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.DynamicBody; def.position.set(20 / Constants.PPM, 90 / Constants.PPM); def.fixedRotation = false; pBody = world.createBody(def); CircleShape shape = new CircleShape(); shape.setRadius(10 / Constants.PPM); pBody.createFixture(shape, 1.0f); def.bullet = true; shape.dispose(); return pBody; } //     public Body createfloor() { Body fBody; BodyDef def = new BodyDef(); //   def.type = BodyDef.BodyType.StaticBody; //  def.position.set(0, 0); //   def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); //   shape.setAsBox(480 / Constants.PPM, 70 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } //     public Body createwall(int xo, int yo) { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(xo / Constants.PPM, yo / Constants.PPM); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(50 / Constants.PPM, 100 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } //   public Body createverticals(int xo, int xy) { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.DynamicBody; def.position.set(xo / Constants.PPM, xy / Constants.PPM); def.fixedRotation = false; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(5 / Constants.PPM, 10 / Constants.PPM); fBody.createFixture(shape, 1.0f); def.bullet = true; shape.dispose(); return fBody; } //   public Body createhorizontals(int xo, int xy) { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.DynamicBody; def.position.set(xo / Constants.PPM, xy / Constants.PPM); def.fixedRotation = false; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(13 / Constants.PPM, 5 / Constants.PPM); fBody.createFixture(shape, 1.0f); def.bullet = true; shape.dispose(); return fBody; } }


原来很好，对吗？ 通过更改几个参数，您可以完全实现所需的功能！ 而且不要写太多行代码。

但是现在我想看到一个弹性的打击。 并在舞台上放置更多对象。 我们得到以下结果：

图片

这是代码：
 package com.mygdx.game; import com.badlogic.gdx.ApplicationAdapter; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.physics.box2d.FixtureDef; import com.badlogic.gdx.graphics.GL20; import com.badlogic.gdx.graphics.OrthographicCamera; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.graphics.g2d.SpriteBatch; import com.badlogic.gdx.math.Vector2; import com.badlogic.gdx.math.Vector3; import com.badlogic.gdx.physics.box2d.Body; import com.badlogic.gdx.physics.box2d.BodyDef; import com.badlogic.gdx.physics.box2d.Box2DDebugRenderer; import com.badlogic.gdx.physics.box2d.CircleShape; import com.badlogic.gdx.physics.box2d.PolygonShape; import com.badlogic.gdx.physics.box2d.World; import utils.Constants; public class MyGdxGame extends ApplicationAdapter { SpriteBatch batch; Texture img; private OrthographicCamera camera; private boolean DEBUG = false; private World world; private Body ball; private Body floor; private Body wall; private Body verticals; private Body horizontals; private Box2DDebugRenderer b2dr; public void create() { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); camera = new OrthographicCamera(); camera.setToOrtho(false, w / 2, h / 2); world = new World(new Vector2(0, -9.8f), false); b2dr = new Box2DDebugRenderer(); //   ball = createPlayer(); //   floor = createfloor(); wall = createwall(100, 170); wall = createwall(-60, 170); //   .   ,   verticals = createverticals(5, 50); verticals = createverticals(10, 50); verticals = createverticals(15, 50); verticals = createverticals(20, 50); verticals = createverticals(25, 50); verticals = createverticals(30, 50); verticals = createverticals(35, 50); verticals = createverticals(5, 55); verticals = createverticals(10, 55); verticals = createverticals(15, 55); verticals = createverticals(20, 55); verticals = createverticals(25, 55); verticals = createverticals(30, 55); verticals = createverticals(35, 55); verticals = createverticals(5, 60); verticals = createverticals(10, 60); verticals = createverticals(15, 60); verticals = createverticals(20, 60); verticals = createverticals(25, 60); verticals = createverticals(30, 60); verticals = createverticals(35, 60); verticals = createverticals(5, 70); verticals = createverticals(10, 70); verticals = createverticals(15, 70); verticals = createverticals(20, 70); verticals = createverticals(25, 70); verticals = createverticals(30, 70); verticals = createverticals(35, 70); verticals = createverticals(5, 80); verticals = createverticals(10, 80); verticals = createverticals(15, 80); verticals = createverticals(20, 80); verticals = createverticals(25, 80); verticals = createverticals(30, 80); verticals = createverticals(35, 80); } public void render() { update(Gdx.graphics.getDeltaTime()); Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); b2dr.render(world, camera.combined.scl(Constants.PPM)); } public void resize(int width, int height) { camera.setToOrtho(false, width / 2, height / 2); } public void dispose() { world.dispose(); b2dr.dispose(); } public void update(float delta) { world.step(1 / 60f, 6, 2); inputUpdate(delta); cameraUpdate(delta); } //    public void inputUpdate(float delta) { ball.setAngularVelocity(3.0f); } public void cameraUpdate(float delta) { Vector3 position = camera.position; position.x = ball.getPosition().x * Constants.PPM; position.y = ball.getPosition().y * Constants.PPM; camera.position.set(position); camera.update(); } //   public Body createPlayer() { Body pBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.DynamicBody; def.position.set(20 / Constants.PPM, 800 / Constants.PPM); def.fixedRotation = false; pBody = world.createBody(def); CircleShape shape = new CircleShape(); shape.setRadius(10 / Constants.PPM); pBody.createFixture(shape, 1.0f); def.bullet = true; shape.dispose(); return pBody; } //   public Body createfloor() { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(0, 0); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(480 / Constants.PPM, 70 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } //   public Body createwall(int xo, int yo) { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(xo / Constants.PPM, yo / Constants.PPM); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(50 / Constants.PPM, 100 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } //      public Body createverticals(int xo, int yo) { Body pBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.DynamicBody; def.position.set(xo / Constants.PPM, yo / Constants.PPM); def.fixedRotation = false; pBody = world.createBody(def); CircleShape shape = new CircleShape(); shape.setRadius(2 / Constants.PPM); //     FixtureDef fd = new FixtureDef(); //  fd.restitution = 1.0f; //  fd.density = 5.0f; //  fd.friction = 0.01f; fd.shape = shape; pBody.createFixture(fd); def.bullet = true; shape.dispose(); return pBody; } }


在Box2D中创建购物车并不容易。 有必要将物体束缚起来，以使它们整体移动。 以下GIF仅显示了本质。

图片


这是怎么发生的？
 package com.mygdx.game; import com.badlogic.gdx.ApplicationAdapter; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.Input; import com.badlogic.gdx.graphics.GL20; import com.badlogic.gdx.graphics.OrthographicCamera; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.graphics.g2d.SpriteBatch; import com.badlogic.gdx.math.Vector2; import com.badlogic.gdx.math.Vector3; import com.badlogic.gdx.physics.box2d.Body; import com.badlogic.gdx.physics.box2d.BodyDef; import com.badlogic.gdx.physics.box2d.Box2DDebugRenderer; import com.badlogic.gdx.physics.box2d.CircleShape; import com.badlogic.gdx.physics.box2d.PolygonShape; import com.badlogic.gdx.physics.box2d.World; import utils.Constants; public class MyGdxGame extends ApplicationAdapter { SpriteBatch batch; Texture img; private OrthographicCamera camera; private boolean DEBUG = false; private World world; private Body ball; private Body ball1; private Body floor; private Body wall; private Body verticals; private Body horizontals; private Box2DDebugRenderer b2dr; public void create() { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); camera = new OrthographicCamera(); camera.setToOrtho(false, w / 2, h / 2); world = new World(new Vector2(0, -9.8f), false); b2dr = new Box2DDebugRenderer(); //   ball = createPlayer(20 / Constants.PPM, 70 / Constants.PPM); ball1 = createPlayer(50 / Constants.PPM, 70 / Constants.PPM); floor = createfloor(); wall = createwall(430, 170); wall = createwall(-430, 170); verticals = createverticals(); } public void render() { update(Gdx.graphics.getDeltaTime()); Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); b2dr.render(world, camera.combined.scl(Constants.PPM)); } public void resize(int width, int height) { camera.setToOrtho(false, width / 2, height / 2); } public void dispose() { world.dispose(); b2dr.dispose(); } public void update(float delta) { world.step(1 / 60f, 6, 2); inputUpdate(delta); cameraUpdate(delta); } public void inputUpdate(float delta) { //   .         ball.setLinearVelocity(3.0f, ball.getLinearVelocity().y); ball1.setLinearVelocity(3.0f, ball.getLinearVelocity().y); verticals.setLinearVelocity(3.0f, verticals.getLinearVelocity().y); } public void cameraUpdate(float delta) { Vector3 position = camera.position; position.x = ball.getPosition().x * Constants.PPM; position.y = ball.getPosition().y * Constants.PPM; camera.position.set(position); camera.update(); } //   public Body createPlayer(float xo, float yo) { Body pBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.DynamicBody; def.position.set(xo, yo); def.fixedRotation = false; pBody = world.createBody(def); CircleShape shape = new CircleShape(); shape.setRadius(10 / Constants.PPM); pBody.createFixture(shape, 1.0f); def.bullet = true; shape.dispose(); return pBody; } public Body createfloor() { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(0, 0); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(480 / Constants.PPM, 70 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } public Body createwall(int xo, int yo) { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(xo / Constants.PPM, yo / Constants.PPM); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(50 / Constants.PPM, 100 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } //   public Body createverticals() { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.DynamicBody; def.position.set(30 / Constants.PPM, 90 / Constants.PPM); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(30 / Constants.PPM, 3 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } }


如果看一下代码，您会发现这不是真正的购物车，而是车轮上的摇杆。 发烧友！ Youtube上有一个视频 ，其中在Box2D中制作了四冲程ICE。 我们更糟吗？ 等待评论成功！

图片


更多冲突！
 package com.mygdx.game; import com.badlogic.gdx.ApplicationAdapter; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.graphics.GL20; import com.badlogic.gdx.graphics.OrthographicCamera; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.graphics.g2d.SpriteBatch; import com.badlogic.gdx.math.Vector2; import com.badlogic.gdx.math.Vector3; import com.badlogic.gdx.physics.box2d.Body; import com.badlogic.gdx.physics.box2d.BodyDef; import com.badlogic.gdx.physics.box2d.Box2DDebugRenderer; 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.physics.box2d.World; import utils.Constants; public class MyGdxGame extends ApplicationAdapter { SpriteBatch batch; Texture img; private OrthographicCamera camera; private boolean DEBUG = false; private World world; private Body ball; private Body ball1; private Body ball2; private Body ball3; private Body ball4; private Body ball5; private Body floor; private Body wall; private Body verticals; private Body horizontals; private Box2DDebugRenderer b2dr; public void create() { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); camera = new OrthographicCamera(); camera.setToOrtho(false, w / 2, h / 2); world = new World(new Vector2(0, -9.8f), false); b2dr = new Box2DDebugRenderer(); //      ball = createPlayer(20 / Constants.PPM, 150 / Constants.PPM); ball1 = createPlayer(35 / Constants.PPM, 200 / Constants.PPM); ball2 = createPlayer(35 / Constants.PPM, 300 / Constants.PPM); ball3 = createPlayer(20 / Constants.PPM, 400 / Constants.PPM); ball4 = createPlayer(35 / Constants.PPM, 200 / Constants.PPM); ball5 = createPlayer(45 / Constants.PPM, 500 / Constants.PPM); floor = createfloor(); wall = createwall(100, 170); wall = createwall(-60, 170); } public void render() { update(Gdx.graphics.getDeltaTime()); Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); b2dr.render(world, camera.combined.scl(Constants.PPM)); } public void resize(int width, int height) { camera.setToOrtho(false, width / 2, height / 2); } public void dispose() { world.dispose(); b2dr.dispose(); } public void update(float delta) { world.step(1 / 60f, 6, 2); cameraUpdate(delta); } public void cameraUpdate(float delta) { Vector3 position = camera.position; position.x = ball.getPosition().x * Constants.PPM; position.y = ball.getPosition().y * Constants.PPM; camera.position.set(position); camera.update(); } public Body createPlayer(float xo, float yo) { Body pBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.DynamicBody; def.position.set(xo, yo); def.fixedRotation = false; pBody = world.createBody(def); CircleShape shape = new CircleShape(); shape.setRadius(10 / Constants.PPM); pBody.createFixture(shape, 0.0001f); def.bullet = true; // ,      FixtureDef fd = new FixtureDef(); fd.restitution = 1.0f; fd.density = 5.0f; fd.friction = 0.01f; fd.shape = shape; pBody.createFixture(fd); shape.dispose(); return pBody; } public Body createfloor() { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(0, 0); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(480 / Constants.PPM, 70 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } public Body createwall(int xo, int yo) { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(xo / Constants.PPM, yo / Constants.PPM); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(50 / Constants.PPM, 100 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } }


还有今天的最后一张GIF。 从物理学课程中，我们熟悉了斜面。 该代码描述了如何获得更复杂的形式（理论上是任意的），从而为游戏物理学开辟了无限的可能性。

图片

斜面
 public class MyGdxGame extends ApplicationAdapter { SpriteBatch batch; Texture img; private OrthographicCamera camera; private boolean DEBUG = false; private World world; private Body ball; private Body floor; private Body wall; private Body plos; private Body verticals; private Body horizontals; private Box2DDebugRenderer b2dr; public void create() { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); camera = new OrthographicCamera(); camera.setToOrtho(false, w / 2, h / 2); world = new World(new Vector2(0, -9.8f), false); b2dr = new Box2DDebugRenderer(); ball = createPlayer(); floor = createfloor(); wall = createwall(430, 170); wall = createwall(-430, 170); plos = createplos(); } public void render() { update(Gdx.graphics.getDeltaTime()); Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); b2dr.render(world, camera.combined.scl(Constants.PPM)); } public void resize(int width, int height) { camera.setToOrtho(false, width / 2, height / 2); } public void dispose() { world.dispose(); b2dr.dispose(); } public void update(float delta) { world.step(1 / 60f, 6, 2); cameraUpdate(delta); } public void cameraUpdate(float delta) { Vector3 position = camera.position; position.x = ball.getPosition().x * Constants.PPM; position.y = ball.getPosition().y * Constants.PPM; camera.position.set(position); camera.update(); } public Body createPlayer() { Body pBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.DynamicBody; def.position.set(30 / Constants.PPM, 190 / Constants.PPM); def.fixedRotation = false; pBody = world.createBody(def); CircleShape shape = new CircleShape(); shape.setRadius(10 / Constants.PPM); pBody.createFixture(shape, 1.0f); def.bullet = true; shape.dispose(); return pBody; } public Body createfloor() { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(0, 0); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(480 / Constants.PPM, 70 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } public Body createwall(int xo, int yo) { Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(xo / Constants.PPM, yo / Constants.PPM); def.fixedRotation = true; fBody = world.createBody(def); PolygonShape shape = new PolygonShape(); shape.setAsBox(50 / Constants.PPM, 100 / Constants.PPM); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } public Body createplos() { Vector2[] vertices = new Vector2[3]; vertices[0] = new Vector2(0f , -0.6f ); vertices[1] = new Vector2(1f , -0.6f ); vertices[2] = new Vector2(1f , 1f); PolygonShape shape = new PolygonShape(); Body fBody; BodyDef def = new BodyDef(); def.type = BodyDef.BodyType.StaticBody; def.position.set(20 / Constants.PPM, 90 / Constants.PPM); def.fixedRotation = true; fBody = world.createBody(def); shape.set(vertices); fBody.createFixture(shape, 0.001f); shape.dispose(); return fBody; } }


我希望借助此代码，您将能够了解Box2D的基础知识，并且诞生了非常出色的应用程序！ 感谢您阅读到底！ 我将尝试回答评论中的所有问题！

Source: https://habr.com/ru/post/zh-CN450272/

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