错误
AL lib: (EE) alc_cleanup: 1 device not closed
Assertion failed!
Program: C:\Program Files\Java\jre1.8.0_25\bin\javaw.exe
File: /var/lib/jenkins/workspace/libgdx/extensions/gdx-box2d/gdx-box2d/jni/Box2D/Dynamics/b2World.cpp, Line 109
Expression: IsLocked() == false
下一行是错误发生之前的最后一行:
Body body = world.createBody(bodyDef);
我不明白这是怎么引起问题的。
world
和bodyDef
不是null
。程序的结构是,我有一个
GameStateRegular
类,该类在其init
方法中添加了两个新的VirusEntity
对象,如下所示:VirusEntity virus0 = new VirusEntity(world, mother, new Vector2(0, 0));
VirusEntity virus1 = new VirusEntity(world, mother, new Vector2(100, 100));
viruses.add(virus0);
viruses.add(virus1);
这很好。我设置了一个
VirusEntity
,以使其以Contact
开头MotherCellEntity
时执行以下代码:private void setContactListener() {
world.setContactListener(new ContactAdapter() {
@Override
public void beginContact(Contact contact) {
Body bodyA = contact.getFixtureA().getBody();
Body bodyB = contact.getFixtureB().getBody();
if (bodyA == mother.getBody()) work(bodyA, bodyB);
else if (bodyB == mother.getBody()) work(bodyB, bodyA);
}
private void work(Body motherCellBody, Body virusBody) {
VirusEntity virus = null;
for (VirusEntity v : viruses) {
if (v.getBody() == virusBody) virus = v;
}
virus.remove();
VirusEntity newVirus = new VirusEntity(world, mother, virus.getSpawnPosition());
viruses.add(newVirus);
}
});
}
我将相同的
World
对象和相同的MotherCellEntity
对象引用到正在创建的新VirusEntity
中,但是我仍然无法确定发生了什么。完整的
GameStateRegular
类:http://pastebin.com/mFpmp28T完整的
VirusEntity
类:http://pastebin.com/HjSGS4ER谢谢大家的帮助。我在这个主题上非常模糊,因为我真的不了解发生了什么。我试图对此做一些背景研究,但没有成功。
最佳答案
我如何成功
我所做的是在update
类的GameStateRegular
方法内部:
@Override
public void update() {
world.step(1, 1, 1);
mother.update();
for (int i = 0; i < viruses.size(); i++) {
VirusEntity e = viruses.get(i);
if (e.isRemoved()) {
viruses.remove(e);
e.dispose();
// --v--
VirusEntity newVirus = new VirusEntity(world, mother, e.getSpawnPosition());
viruses.add(newVirus);
// --^--
} else e.update();
}
}
另外,对于我的
ContactAdapter
:private void setContactListener() {
world.setContactListener(new ContactAdapter() {
@Override
public void preSolve(Contact contact, Manifold manifold) {
Body bodyA = contact.getFixtureA().getBody();
Body bodyB = contact.getFixtureB().getBody();
if (bodyA == mother.getBody()) virusInvolved(bodyA, bodyB);
else if (bodyB == mother.getBody()) virusInvolved(bodyB, bodyA);
}
private void virusInvolved(Body motherCellBody, Body virusBody) {
VirusEntity virus = null;
for (VirusEntity v : viruses) {
if (v.getBody() == virusBody) virus = v;
}
if (virus != null) {
virus.setMovementAllowed(false);
virus.remove();
}
}
});
}