3D Tetris game

Development Programming & Scripting C++
5

Ok folks,

I found a way to dynamically spawn objects thanks to a tutorial.

First you have to create 2 c++ classes child of Actor class : ACubes_Controller and ACubes_Parent

you just have to write some code in Cubes_Controller.cpp Cubes_Controller.h :

Cubes_Controller.h :


// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "GameFramework/Actor.h"
#include "Cubes_Parent.h"
#include "Cubes_Controller.generated.h"


UCLASS()
class TETRIS2_API ACubes_Controller : public AActor
{
	GENERATED_BODY()

public:
	// Sets default values for this actor's properties
	ACubes_Controller();

	// Called when the game starts or when spawned
	virtual void BeginPlay() override;

	// Called every frame
	virtual void Tick(float DeltaSeconds) override;

	float XCoord;

	 UPROPERTY(EditDefaultsOnly, Category = "Our Spawning object")
		TSubclassOf<ACubes_Parent> SpawningObject;


};

Cubes_Controller.cpp :


// Fill out your copyright notice in the Description page of Project Settings.

#include "tetris2.h"
#include "Cubes_Controller.h"


// Sets default values
ACubes_Controller::ACubes_Controller()
{
	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
	PrimaryActorTick.bCanEverTick = true;

}

// Called when the game starts or when spawned
void ACubes_Controller::BeginPlay()
{
	Super::BeginPlay();

	//UE_LOG(LogTemp, Warning, TEXT("test test_____________ test __________________test_____________test"));

	FActorSpawnParameters SpawnParams;
	SpawnParams.Owner = this;
	SpawnParams.Instigator = Instigator;

	ACubes_Parent* NewObject = GetWorld()->SpawnActor<ACubes_Parent>(SpawningObject, FVector(0.f, 0.f, 0.f), FRotator::ZeroRotator, SpawnParams);

}

// Called every frame
void ACubes_Controller::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);

}

You compile in UE4, and it should work.

Then in the class viewer you create a couple of blueprints :

BP_Cubes_Parent from ACubes_Parent class
BP_Cubes_Controller from ACubes_Controller class

In BP_Cubes_Parent you add a satic mesh component, and drag and drop your mesh in the correct place (my mesh is a cube since my project is a Tetris)
In BP_Cubes_Controller you define SpawningObject as “BP_Cubes_Parent”

you drag and drop these 2 blueprints on the scene, you play the level and you can see that your mesh is dynamically duplicated (or spawned) :smiley: