Java 表达式:IsLocked()==false,在引用世界时崩溃?
错误Java 表达式:IsLocked()==false,在引用世界时崩溃?,java,crash,box2d,Java,Crash,Box2d,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:
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
以下行是错误发生前的最后一行:
Body body = world.createBody(bodyDef);
我不明白这是怎么造成问题的world
和bodyDef
不是null
我的程序的结构是这样的:我有一个GameStateRegular
类,它在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);
这个很好用。我设置了一个VirusEntity
,当它开始与MotherCellEntity
联系时,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);
}
});
}
我正在引用相同的World
对象,以及相同的MotherCellEntity
对象到正在创建的新VirusEntity
,但我仍然无法判断这里发生了什么
完整GameStateRegular
类:完整
VirusEntity
class:
谢谢大家的帮助。我在这个话题上含糊不清,因为我真的不明白发生了什么。我试图做一些背景调查,但没有成功。我是如何成功的 我所做的是在我的
GameStateRegular
类中的update
方法中:
@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();
}
}
IsLocked()==false
如果在物理模拟步骤运行时尝试修改物理世界,则始终会发生。通常,当您尝试在contact/collision回调中从世界中删除实体时,会发生这种情况。
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();
}
}
});
}