前言 输入系统,输入某个键,响应到GamePlay层做对应的事.例如 点击鼠标,前进还是开枪之类,是如何响应的.这里只说应用层逻辑,硬件层逻辑不讲述. 详解 1.问题来源 先看下面一个例子:跳跃的事件响应堆栈 从上述堆栈我们不难发现,疑惑点主要集中于 APlayerController::ProcessPlayerInput 和 UPlayerInput::ProcessInputStack. (APlayerController::PlayerTick之前的堆栈可以忽略) 2.简要分析 先查看…

Version: Unreal 4.26 问题 为啥UE编辑器会有EPlayNetMode有三种让你选择. 为啥描述World 的ENetMode 会有4种,而不只是(Client/Server 2种). 为何Actor 会有Role的概念. EPlayNetMode UENUM() enum EPlayNetMode { /** A non-networked game will be started. This can be used in combination with bLaunchS…

参考:https://www.raywenderlich.com/270-unreal-engine-4-particle-systems-tutorial (使用了一个飞机射击游戏的粒子来展示,全英文) 虚幻引擎中文文档:http://api.unrealengine.com/CHN/ 详细的官方“级联粒子系统”cascade文档入口:http://api.unrealengine.com/CHN/Engine/Rendering/ParticleSystems/index.html 首先,我…

20.choose two Examine the description of the EMP_DETAILS table given below: Which two statements are true regarding SQL statements that can be executed on the EMP_DETAIL table? A) You cannot add a new column to the table with LONG as the data type. B…

18.(8-7) choose twoWhich two statements are true regarding views? (Choose two.) A) A simple view in which column aliases have been used cannot be updated.B) The OR REPLACE option is used to change the definition of an existing view without droppingan…

17.(7-11) choose twoView the Exhibit and examine the structure of ORDER_ITEMS and ORDERS tables.You need to remove from the ORDER_ITEMS table those rows that have an order status of 0 or 1 inthe ORDERS table.Which two DELETE statements are valid? (Ch…

16.(7-5) choose the best answerThe PRODUCTS table has the following structure:Evaluate the following two SQL statements:SQL>SELECT prod_id, NVL2(prod_expiry_date, prod_expiry_date + 15,'')FROM products;SQL>SELECT prod_id, NVL(prod_expiry_date, prod_…

15.(6-24)choose the best answerExamine the structure of the MEMBERS table:You want to display details of all members who reside in states starting with the letter A followedby exactly one character. Which SQL statement must you execute? A. SELECT * F…

14.(6-13) choose the best answer:View the Exhibit and examine the structure of the ORDERS table.Which UPDATE statement is valid? A) UPDATE ordersSET order_date = '12-mar-2007'AND order_total = TO_NUMBER(NULL)WHERE order_id = 2455; B) UPDATE ordersSET…

13.(6-7) choose twoWhich two statements are true regarding operators used with subqueries? (Choose two.)A) =ANY and =ALL operators have the same functionality.E) The NOT IN operator is equivalent to is NULL.C) The <ANY operator means less than the ma…