praca_magisterska/games/unreal/tutorial/part-1-cpp-project-setup.md

Part 1 (C++): Project Setup

← Back to Index | Next: Part 2 (C++) - Create the Player →

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Overview

This is the C++ version of Part 1. Unlike the Blueprint tutorial which creates a Blueprint-only project, we'll create a C++ project from the start. This enables:

• ✅ Copy-paste variable definitions instead of clicking UI
• ✅ Version control friendly (readable diffs)
• ✅ Faster development (define 12 variables in 30 seconds vs 15 minutes)

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Step 1.1: Create New C++ Project

1. Open Epic Games Launcher

2. Click "Unreal Engine" tab on the left sidebar

3. Click yellow "Launch" button next to your UE5 version

4. Wait for Unreal Engine to open (this may take 1-2 minutes)

5. In the "Unreal Project Browser" window that appears:

   • At the top, select "Games" category (should be selected by default)
   • Click "Blank" template (empty square icon)

6. On the right side panel, configure:

   • Project Defaults: C++ ⚠️ (NOT Blueprint!)
   • Target Platform: Desktop
   • Quality Preset: Scalable (faster compile times, easier iteration)
   • Starter Content: UNCHECKED (reduces project size and avoids unnecessary assets for this bullet-hell game)
   • Raytracing: UNCHECKED

7. At the bottom:

   • Choose folder location where you want to save
   • Name the project: BulletHellGame

8. Click "Create" button (bottom right, yellow)

What Happens Next

Unreal will:

1. Generate C++ project files (~30 seconds)
2. Open your IDE (Visual Studio Code will launch if configured)
3. Automatically start compiling the initial project (2-5 minutes, first time only)
   • You'll see a terminal/console window showing compilation progress
   • On Linux: Uses clang++ or g++ to compile C++ files
   • Progress shown as: "Compiling C++ source files...", "Linking...", etc.
4. Open Unreal Editor once compilation completes

⚠️ IMPORTANT: Do NOT close the IDE or compilation window! Wait for compilation to finish. You'll see "Build succeeded" or similar message when done.

Expected Result

After compilation completes:

Unreal Editor viewport shows:

• Empty 3D viewport in the center with grid floor
• Main toolbar at the top (File, Edit, Window, etc.)
• Outliner panel on the right showing "Untitled" level actors
• Details panel on the right side (currently empty)
• Content Drawer button at bottom (click it or press Ctrl+Space to open)

VS Code (your IDE) shows:

• BulletHellGame project folder open
• Left sidebar with file explorer showing Source/ folder
• STGPawn.h and STGPawn.cpp or similar auto-generated files

What you should see in Unreal Editor:

• A flat grid representing the game world (top-down view by default in new projects)
• No errors in the Output Log
• The word "Ready" or compilation success message in bottom-right corner

NOTE: If you see a 3D perspective view instead of top-down, don't worry - we'll fix that in Step 1.3.

Troubleshooting

IDE didn't open? (Visual Studio Code on Linux/Arch)

On Arch Linux with VS Code:

• Install VS Code if not present: sudo pacman -S code
• Install Unreal Engine extension for VS Code
• In Unreal Editor: Edit → Editor Preferences → Source Code
• Set "Source Code Editor" to "Visual Studio Code"
• Right-click the .uproject file in file manager → "Generate VSCode project files"
• Open the project folder in VS Code

Compilation failed? (Linux/Arch)

On Arch Linux:

• Ensure you have the required build tools:
  • sudo pacman -S base-devel clang lld
• Check the Output Log (Window → Developer Tools → Output Log) for specific errors
• If missing libraries, install them via pacman
• Try regenerating project files: Right-click .uproject → "Generate VSCode project files"

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Step 1.2: Verify C++ Project Structure

Before continuing, verify the C++ files were created:

1. In your file explorer, navigate to your project folder
2. You should see:

BulletHellGame/
├── BulletHellGame.uproject          # Project file
├── Source/                           # ⭐ C++ source code (this is new!)
│   └── BulletHellGame/
│       ├── BulletHellGame.h
│       ├── BulletHellGame.cpp
│       ├── BulletHellGame.Build.cs  # Build configuration
│       └── BulletHellGameGameMode.h/cpp  # Auto-generated
├── Content/                          # Assets and Blueprints
├── Config/                           # Project settings
├── Binaries/                         # Compiled code (gitignore this)
├── Intermediate/                     # Build artifacts (gitignore this)
└── BulletHellGame.sln               # Visual Studio solution (if using VS)

The Source/ folder is what makes this a C++ project! This is where we'll add our game classes.

Expected Result

In File Explorer (your Linux file manager):

BulletHellGame/
├── BulletHellGame.uproject       # Double-click to open project
├── Source/                        # ✅ C++ source code folder
│   └── BulletHellGame/
│       ├── BulletHellGame.h
│       ├── BulletHellGame.cpp
│       └── BulletHellGame.Build.cs
├── Content/                       # Assets and Blueprints
├── Config/                        # Project configuration
├── Binaries/                      # Compiled game (gitignore this)
└── Intermediate/                  # Build files (gitignore this)

Verify the Source folder exists - this confirms C++ is enabled!

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Step 1.3: Set Up 2D Game View

Same as Blueprint tutorial:

1. In the main viewport, look at the top-left corner
2. Click the dropdown that says "Perspective"
3. Select "Top" from the dropdown menu (Alt + J)

Expected Result

Viewport changes:

• Camera now looks straight down at the grid
• You see the game world from a bird's-eye view (perfect for bullet-hell)
• Grid appears as horizontal lines (X and Y axes visible)
• Objects will appear flat when placed in this view

Visual confirmation:

• Top-left corner now shows "Top" instead of "Perspective"
• The viewport manipulation gizmo (3D arrows) now shows only X and Y axes prominently

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Step 1.4: Create Folder Structure

1. Open Content Browser (or Content Drawer with Ctrl+Space)

2. You should see "Content" folder on the left panel

3. Right-click on "Content" folder → New Folder

   • Name it: Blueprints (we'll use these for visual-only children)

4. Right-click on "Content" folder → New Folder

   • Name it: Materials

5. Right-click on "Content" folder → New Folder

   • Name it: Sprites (for 2D textures)

6. Right-click on "Content" folder → New Folder

   • Name it: UI

Expected Result

Content Browser shows 4 folders:

Content/
├── Blueprints/    (For Blueprint children that inherit from C++)
├── Materials/
├── Sprites/
└── UI/

AND you should also see:

C++ Classes/
└── BulletHellGame/
    └── BulletHellGameGameMode  (Auto-generated C++ class)

This "C++ Classes" folder shows all C++ classes in the project.

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Step 1.5: Configure .gitignore (Recommended)

If using version control, create .gitignore in your project root:

# Unreal Engine
Binaries/
DerivedDataCache/
Intermediate/
Saved/

# IDE
*.sln
*.suo
*.opensdf
*.sdf
*.VC.db
*.VC.opendb
.vs/
.vscode/
.idea/

# Build artifacts
Build/
Releases/

This prevents committing large binary files and build artifacts.

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Comparison: C++ vs Blueprint Project

Aspect	Blueprint Project	C++ Project
Project creation time	~30 seconds	~5 minutes (first time)
Source/ folder	❌ No	✅ Yes
IDE integration	❌ No	✅ Yes
Can add C++ classes	❌ Requires migration	✅ Ready to go
Compile time	None (Blueprints)	30-60 sec per change
Hot reload	Instant	Limited support

Key Difference: C++ project has the Source/ folder from the start. Blueprint projects require manual migration to add C++ support later.

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What's Next?

In Part 2, we'll create the player ship as a C++ class instead of a Blueprint. You'll see how defining 12 variables takes 30 seconds with copy-paste instead of 15 minutes with UI clicks.

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← Back to Index | Next: Part 2 (C++) - Create the Player →