小编Seb*_*tro的帖子

我正在研究需要定向灯的游戏创意(2D).基本上我想添加可以移动的光源,光线与场景中的其他物体相互作用.

我现在正在做的是使用传感器(box2d)和ccDrawLine的一些测试,我可以实现类似于我想要的东西.基本上我从某个点发送了一堆传感器,并通过光线检测来检测碰撞,得到终点并在传感器上画线.

只是想获得一些意见,如果这是一个很好的方式这样做或是其他更好的选择来构建这样的东西？

此外,我想知道如何在这个区域(传感器区域)上产生光效,以提供更好的光效.有任何想法吗？

我刚刚更新到Android Studio 3.3并尝试将Gradle插件更新为3.3.0但项目构建失败.

该项目是一个带有应用程序(使用该库)的库.尝试了一切:清除,重建,重置,删除.gradle目录,甚至没有运气重启计算机.任何的想法？

这是堆栈跟踪

org.gradle.api.ProjectConfigurationException: A problem occurred configuring project ':screenz_library'.
    |95 internal calls|
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
    at java.lang.Thread.run(Thread.java:745)
Caused by: com.android.build.gradle.internal.crash.ExternalApiUsageException: java.lang.NullPointerException
    at com.android.build.gradle.internal.ApiObjectFactory.create(ApiObjectFactory.java:137)
    at com.android.build.gradle.BasePlugin.createAndroidTasks(BasePlugin.java:777)
    at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:81)
    at com.android.build.gradle.BasePlugin.lambda$createTasks$4(BasePlugin.java:651)
    at com.android.build.gradle.internal.crash.CrashReporting$afterEvaluate$1.execute(crash_reporting.kt:37)
    at com.android.build.gradle.internal.crash.CrashReporting$afterEvaluate$1.execute(crash_reporting.kt)
    at org.gradle.configuration.internal.DefaultListenerBuildOperationDecorator$BuildOperationEmittingAction$1$1.run(DefaultListenerBuildOperationDecorator.java:155)
    at org.gradle.configuration.internal.DefaultUserCodeApplicationContext.reapply(DefaultUserCodeApplicationContext.java:58)
    at org.gradle.configuration.internal.DefaultListenerBuildOperationDecorator$BuildOperationEmittingAction$1.run(DefaultListenerBuildOperationDecorator.java:152)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:300)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:292)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:174)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
    at org.gradle.configuration.internal.DefaultListenerBuildOperationDecorator$BuildOperationEmittingAction.execute(DefaultListenerBuildOperationDecorator.java:149)
    at org.gradle.internal.event.BroadcastDispatch$ActionInvocationHandler.dispatch(BroadcastDispatch.java:91)
    at org.gradle.internal.event.BroadcastDispatch$ActionInvocationHandler.dispatch(BroadcastDispatch.java:80)
    at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:42)
    at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:230)
    at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:149)
    at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:58)
    at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:324)
    at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:234)
    at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:140)
    at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:37)
    at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
    at com.sun.proxy.$Proxy29.afterEvaluate(Unknown Source) …

有人在同一台机器上并排有这两个版本的Xcode吗？

我安装了Xcode 4.4.1,我想更新到最新版本(4.5),所以我可以使用iOS 6 SDK,但我需要为某些客户端保留4.4.1.

我可以制作此版本的简单副本并在升级后继续安装吗？因为我知道有些人试图做到这一点而失败了.