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Learning Qlik Sense: The Official Guide

By : Christopher Ilacqua, Henric Cronström, James Richardson

3 (14)

Learning Qlik Sense: The Official Guide

3 (14)

By: Christopher Ilacqua, Henric Cronström, James Richardson

Overview of this book

Learning Qlik® Sense is for anyone seeking to understand and utilize the revolutionary new approach to business intelligence offered by Qlik Sense. Familiarity with the basics of business intelligence will be helpful when picking up this book, but not essential.

Preface

Preface

What is a game engine anyway?

What will using UE4 cost me?

Why don't I just program my own engine and save the 5 percent?

A game's overview – the Play-Reward-Growth loop

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Coding with C++

1. Coding with C++

Setting up our project

Creating your first C++ program

What is building and compiling?

Summary

2. Variables and Memory

2. Variables and Memory

Variables

Summary

3. If, Else, and Switch

3. If, Else, and Switch

Branching

Controlling the flow of your program

Using logical operators

Our first example with Unreal Engine

Summary

4. Looping

4. Looping

The while loop

The do/while loop

The for loop

Looping with Unreal Engine

Summary

5. Functions and Macros

Functions

An example of a <cmath> library function – sqrt()

Writing our own functions

Functions with arguments

Functions that return values

Variables, revisited

Macros

Macros with arguments

Summary

6. Objects, Classes, and Inheritance

6. Objects, Classes, and Inheritance

struct objects

class versus struct

Getters and setters

Constructors and destructors

Class inheritance

Multiple inheritance

Putting your classes into headers

Summary

7. Dynamic Memory Allocation

7. Dynamic Memory Allocation

Dynamic memory allocation

Regular arrays

C++ style dynamic size arrays (new[] and delete[])

Dynamic C-style arrays

Summary

8. Actors and Pawns

8. Actors and Pawns

Actors versus pawns

Creating a world to put your actors in

The UE4 editor

Starting from scratch

Adding an actor to the scene

Creating a player entity

Writing C++ code that controls the game's character

Creating non-player character entities

Displaying a quote from each NPC dialog box

Summary

9. Templates and Commonly Used Containers

9. Templates and Commonly Used Containers

Debugging the output in UE4

UE4's TArray<T>

TSet<T>

TMap<T, S>

C++ STL versions of commonly used containers

Summary

10. Inventory System and Pickup Items

10. Inventory System and Pickup Items

Declaring the backpack

Base class PickupItem

Drawing the player inventory

Summary

11. Monsters

11. Monsters

Landscape

Monsters

Monster attacks on the player

Summary

12. Spell Book

12. Spell Book

The particle systems

Spell class actor

Attaching right mouse click to cast spell

Creating other spells

Summary

Index

Index

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Drawing the player inventory

An inventory screen in a game such as Diablo features a pop-up window, with the icons of the items you've picked up in the past arranged in a grid. We can achieve this type of behavior in UE4.

There are a number of approaches to drawing a UI in UE4. The most basic way is to simply use the HUD::DrawTexture() calls. Another way is to use Slate. Another way still is to use the newest UE4 UI functionality: Unreal Motion Graphics (UMG) Designer.

Slate uses a declarative syntax to lay out UI elements in C++. Slate is best suited for menus and the like. UMG is new in UE 4.5 and uses a heavily blueprint-based workflow. Since our focus here is on exercises that use C++ code, we will stick to a HUD::DrawTexture() implementation. This means that we will have to manage all the data that deals with the inventory in our code.

Using HUD::DrawTexture()

We will achieve this in two steps. The first step is to push the contents of our inventory to the HUD when the user presses...

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