Android LibGdx使身体跳跃
我写了下面的代码来让身体跳跃和其他一些事情，但问题是身体只跳跃到一定的极限，而且只有球员的身体不受重力的影响，所以我将重力比例增加到100 请给出跳跃和重力的解Android LibGdx使身体跳跃,android,libgdx,box2d,game-physics,Android,Libgdx,Box2d,Game Physics,我写了下面的代码来让身体跳跃和其他一些事情，但问题是身体只跳跃到一定的极限，而且只有球员的身体不受重力的影响，所以我将重力比例增加到100 请给出跳跃和重力的解 public class Shoot implements ApplicationListener { private OrthographicCamera camera; private World world; private Box2DDebugRenderer renderer; private
public class Shoot implements ApplicationListener {
private OrthographicCamera camera;
private World world;
private Box2DDebugRenderer renderer;
private short x, y;
private float g;
private SpriteBatch batch;
private ChainShape groundshape;
private BodyDef bdef;
private FixtureDef fdef;
private Body player;
private PolygonShape pshape;
private CircleShape cshape;
private Vector2 v;
private ArrayList<Body> d;
private ArrayList<Body> bullet;
private Sprite bsprite;
private boolean right = true;
private Body enemy;
private byte l = 3;
@Override
public void create() {
d = new ArrayList<Body>();
bullet = new ArrayList<Body>();
dimensions();
camera();
renderer();
world();
batch();
input();
ground();
player();
enemy();
collisions();
bricks(4, -6);
sprites();
}
@Override
public void dispose() {
batch.dispose();
world.dispose();
renderer.dispose();
pshape.dispose();
cshape.dispose();
}
@Override
public void render() {
Gdx.gl.glClearColor(0, 0, 0, 1);
Gdx.gl.glClear(GL30.GL_COLOR_BUFFER_BIT);
world.step(1 / 60f, 8, 3);
batch.setProjectionMatrix(camera.combined);
batch.begin();
for (int i = 0; i < bullet.size(); i++) {
bsprite.setPosition(
bullet.get(i).getPosition().x - bsprite.getWidth() / 2f,
bullet.get(i).getPosition().y - bsprite.getHeight() / 2f);
if (bullet.get(i).getLinearVelocity().y == 200)
bsprite.rotate90(false);
bsprite.draw(batch);
}
batch.end();
for (int i = 0; i < d.size(); i++) {
world.destroyBody(d.get(i));
d.remove(i);
i -= 1;
}
player.setLinearVelocity(v);
camera.position.x = player.getPosition().x;
camera.update();
renderer.render(world, camera.combined);
}
@Override
public void resize(int width, int height) {
camera.viewportWidth = width / 25f;
camera.viewportHeight = height / 25f;
camera.update();
}
@Override
public void pause() {
}
@Override
public void resume() {
}
private void world() {
world = new World(new Vector2(0, -9.81f), true);
}
private void dimensions() {
x = (short) Gdx.graphics.getWidth();
y = (short) Gdx.graphics.getHeight();
g = (float) ((y * 14 / 720f) * (6 / 7f));
}
private void renderer() {
renderer = new Box2DDebugRenderer();
}
private void camera() {
camera = new OrthographicCamera(x / 25f, y / 25f);
}
private void batch() {
batch = new SpriteBatch();
}
private void input() {
Gdx.input.setInputProcessor(new InputProcessor() {
@Override
public boolean touchUp(int screenX, int screenY, int pointer,
int button) {
return false;
}
@Override
public boolean touchDragged(int screenX, int screenY, int pointer) {
return false;
}
@Override
public boolean touchDown(int screenX, int screenY, int pointer,
int button) {
bullet();
return false;
}
@Override
public boolean scrolled(int amount) {
return false;
}
@Override
public boolean mouseMoved(int screenX, int screenY) {
return false;
}
@Override
public boolean keyUp(int keycode) {
if (keycode == Keys.D || keycode == Keys.A) {
v.x = 0;
}
return false;
}
@Override
public boolean keyTyped(char character) {
return false;
}
@Override
public boolean keyDown(int keycode) {
if (keycode == Keys.ESCAPE) {
Gdx.app.exit();
}
if (keycode == Keys.D) {
v.x = 15;
right = true;
}
if (keycode == Keys.A) {
v.x = -15f;
right = false;
}
if (keycode == Keys.SPACE) {
player.applyLinearImpulse(new Vector2(0, 50000),
player.getLocalCenter(), true);
}
return false;
}
});
}
private void ground() {
bdef = new BodyDef();
bdef.type = BodyType.StaticBody;
bdef.allowSleep = true;
groundshape = new ChainShape();
groundshape.createChain(new Vector2[] { new Vector2(-x, -g),
new Vector2(x, -g) });
fdef = new FixtureDef();
fdef.shape = groundshape;
fdef.restitution = 0f;
fdef.friction = 0f;
fdef.density = 0.5f;
world.createBody(bdef).createFixture(fdef);
groundshape.dispose();
}
private void player() {
v = new Vector2(0, 0);
bdef.type = BodyType.DynamicBody;
bdef.allowSleep = true;
bdef.fixedRotation = true;
bdef.gravityScale = 100;
bdef.position.x = 0f;
bdef.position.y = -g + 2f;
pshape = new PolygonShape();
pshape.setAsBox(1, 2);
fdef.shape = pshape;
fdef.friction = 0f;
fdef.restitution = 0f;
fdef.density = 1f;
player = world.createBody(bdef);
player.createFixture(fdef);
cshape = new CircleShape();
cshape.setPosition(new Vector2(0, 3.1f));
cshape.setRadius(1f);
fdef.shape = cshape;
player.createFixture(fdef);
}
private void bricks(float x, float y) {
bdef.type = BodyType.StaticBody;
bdef.allowSleep = true;
bdef.position.x = x;
bdef.position.y = y;
fdef.density = 0.5f;
fdef.restitution = 0f;
pshape.setAsBox(3, 1);
fdef.shape = pshape;
fdef.friction = 0f;
world.createBody(bdef).createFixture(fdef);
}
private void collisions() {
world.setContactListener(new ContactListener() {
@Override
public void preSolve(Contact contact, Manifold oldManifold) {
}
@Override
public void postSolve(Contact contact, ContactImpulse impulse) {
if (contact.getFixtureA().getShape().getType() == cshape
.getType()
|| contact.getFixtureB().getShape().getType() == cshape
.getType()) {
v.y = 0;
}
if (contact.getFixtureA().getBody().isBullet()) {
d.add(contact.getFixtureA().getBody());
bullet.remove(bullet.indexOf(contact.getFixtureA()
.getBody()));
}
if (contact.getFixtureB().getBody().isBullet()) {
d.add(contact.getFixtureB().getBody());
bullet.remove(bullet.indexOf(contact.getFixtureB()
.getBody()));
}
if ((contact.getFixtureA().getBody().equals(enemy) && contact
.getFixtureB().getBody().isBullet())
|| contact.getFixtureB().getBody().equals(enemy)
&& contact.getFixtureA().getBody().isBullet()) {
enemy.setLinearVelocity(0, 0);
l--;
if (l == 0) {
d.add(enemy);
}
}
}
@Override
public void endContact(Contact contact) {
}
@Override
public void beginContact(Contact contact) {
}
});
}
private void bullet() {
bdef.type = BodyType.DynamicBody;
bdef.allowSleep = true;
bdef.bullet = true;
bdef.fixedRotation = true;
bdef.gravityScale = 0;
pshape.setAsBox(0.25f, 0.15f);
if (right && !Gdx.input.isKeyPressed(Keys.W)) {
bdef.position.x = player.getPosition().x + 1.6f;
bdef.position.y = player.getPosition().y + 1f;
} else if (!right && !Gdx.input.isKeyPressed(Keys.W)) {
bdef.position.x = player.getPosition().x - 1.6f;
bdef.position.y = player.getPosition().y + 1f;
} else if (Gdx.input.isKeyPressed(Keys.W)) {
bdef.position.x = player.getPosition().x;
bdef.position.y = player.getPosition().y + 4.5f;
pshape.setAsBox(0.15f, 0.25f);
}
fdef.density = 0.4f;
fdef.shape = pshape;
fdef.restitution = 0f;
fdef.friction = 0f;
bullet.add(world.createBody(bdef));
bullet.get(bullet.size() - 1).createFixture(fdef);
if (right && !Gdx.input.isKeyPressed(Keys.W)) {
bullet.get(bullet.size() - 1).setLinearVelocity(50, 0);
} else if (!right && !Gdx.input.isKeyPressed(Keys.W)) {
bullet.get(bullet.size() - 1).setLinearVelocity(-50, 0);
} else if (Gdx.input.isKeyPressed(Keys.W)) {
bullet.get(bullet.size() - 1).setLinearVelocity(0, 50);
}
}
private void sprites() {
bsprite = new Sprite(new Texture("data/bullet.jpg"));
bsprite.setOrigin(bsprite.getWidth() / 2f, bsprite.getHeight() / 2f);
bsprite.rotate(0);
bsprite.setSize(0.5f, 0.30f);
}
private void enemy() {
bdef.type = BodyType.DynamicBody;
bdef.allowSleep = true;
bdef.fixedRotation = true;
bdef.gravityScale = 100;
bdef.position.x = 7f;
bdef.position.y = -g + 2f;
pshape = new PolygonShape();
pshape.setAsBox(1, 2);
fdef.shape = pshape;
fdef.friction = 0f;
fdef.restitution = 0f;
fdef.density = 1f;
enemy = world.createBody(bdef);
enemy.createFixture(fdef);
cshape = new CircleShape();
cshape.setPosition(new Vector2(0, 3));
cshape.setRadius(1f);
fdef.shape = cshape;
enemy.createFixture(fdef);
}
}
在渲染方法中使用player.setLinearVelocity会阻碍身体的运动，设置y方向的线速度始终为0此代码很难阅读。。。也许你可以把它减少到一些重要的部分？@现在没有人减少了除了删除的导入，没有什么改变。如果你只发布400行完全没有文档的代码，没有人会帮你solved@springrbua这是我应用脉冲后的答案。渲染方法中的setLinearVelocity方法会在所有方向上将速度设置为0。哦，对不起。我不明白这一点。听起来好像这是另一个问题^^抱歉！