praca_magisterska/games/unreal/tutorial/part-4-9-cpp-summary.md

Parts 4-9 (C++): Complete Game Implementation

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Overview

Parts 4-9 follow the same pattern: create C++ classes, copy-paste code, create minimal Blueprint children for visuals.

Due to length constraints, this document summarizes Parts 4-9. Full implementations are in the existing Source/MCPGameProject/ folder.

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Part 4: Create the Enemy (C++)

Quick Summary:

1. Tools → New C++ Class → Actor → Name: STGEnemy
2. Copy variables block (15 enemy stats with defaults)
3. Implement movement (sinusoidal wave pattern)
4. Implement firing (radial bullet burst)
5. Compile
6. Create BP_Enemy Blueprint child

Key Code (STGEnemy.h excerpt):

// 15 variables in one copy-paste!
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Stats")
int32 MaxHealth = 12;

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Stats")
float VerticalSpeed = 220.0f;

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Stats")
float HorizontalAmplitude = 250.0f;

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Stats")
float FireInterval = 0.35f;

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Stats")
int32 BulletsPerBurst = 20;
// ... etc

Time saved: Blueprint (90 min) vs C++ (25 min) = 65 min ⚡

Full implementation: See Source/MCPGameProject/STGEnemy.h/cpp

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Part 5: Create Enemy Spawner (C++)

Quick Summary:

1. Tools → New C++ Class → Actor → Name: STGEnemySpawner
2. Copy spawner variables (spawn rate, area, max enemies)
3. Implement difficulty curve (spawn rate increases over time)
4. Compile
5. Place spawner in level

Key Code:

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Spawning")
float SpawnAreaHalfWidth = 900.0f;

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Spawning")
float BaseSpawnRate = 2.0f;

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Spawning")
int32 MaxSimultaneousEnemies = 120;

Time: ~8 minutes

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Part 6: Create Game Director (C++)

Quick Summary:

1. Tools → New C++ Class → Actor → Name: STGGameDirector
2. Manage game timer (300 seconds)
3. Handle victory/defeat conditions
4. Compile
5. Place in level

Key Code:

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Game")
float GameDuration = 300.0f;

UPROPERTY(BlueprintReadOnly, Category = "Game")
float ElapsedTime = 0.0f;

UPROPERTY(BlueprintReadOnly, Category = "Game")
bool bGameActive = true;

Time: ~10 minutes

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Part 7: Create UI (C++)

Quick Summary:

For UI, we still use Widget Blueprints (visual layout) but bind to C++ for data.

1. Create Widget Blueprint WBP_HUD in UI folder
2. Add Text blocks for Score, Lives, Timer
3. Bind to C++ properties via Blueprint events
4. Create in Player's BeginPlay

Time: ~15 minutes

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Part 8: Create Game Mode (C++)

Quick Summary:

1. Tools → New C++ Class → Game Mode Base → Name: STGGameMode
2. Set default pawn class to STGPawn
3. Handle player death/respawn
4. Compile
5. Set in Project Settings → Maps & Modes

Key Code:

ASTGGameMode::ASTGGameMode()
{
    // Set default pawn
    DefaultPawnClass = ASTGPawn::StaticClass();
}

Time: ~5 minutes

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Part 9: Final Setup (C++)

Quick Summary:

1. Assign visual meshes to Blueprint children (BP_Player, BP_Enemy, BP_Bullet)
2. Set materials and colors
3. Create background plane
4. Test complete game
5. Build for standalone

Time: ~15 minutes

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Total Time Comparison

Part	Blueprint Time	C++ Time	Saved
1. Project Setup	5 min	10 min	-5 min (one-time)
2. Player	60 min	15 min	45 min ⚡
3. Bullet	30 min	10 min	20 min ⚡
4. Enemy	90 min	25 min	65 min ⚡
5. Spawner	40 min	8 min	32 min ⚡
6. Game Director	45 min	10 min	35 min ⚡
7. UI	30 min	15 min	15 min ⚡
8. Game Mode	20 min	5 min	15 min ⚡
9. Final Setup	40 min	15 min	25 min ⚡
TOTAL	~6-8 hours	~2-3 hours	~4-5 hours ⚡⚡⚡

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Full Reference Implementations

All complete C++ files are available in:

Source/MCPGameProject/
├── STGPawn.h/cpp              (Player)
├── STGProjectile.h/cpp        (Bullets)
├── STGEnemy.h/cpp             (Enemies)
├── STGGameMode.h/cpp          (Game rules)
├── STGHUD.h/cpp               (UI binding)
└── STGEffects.h/cpp           (Visual effects)

You can:

1. Copy these files directly to your project
2. Modify as needed
3. Compile and use

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Key Takeaway

The C++ approach saves 60% development time by:

✅ Copy-pasting variable blocks (seconds vs minutes)
✅ Using IDE tools (autocomplete, refactoring)
✅ Version control friendly (readable diffs)
✅ Type-safe (compiler catches errors)
✅ Easier to maintain (code is documentation)

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