SquirrelRNG.h

/*
 * Copyright (c) 2025 Grzegorz Krug.
 * All Rights Reserved.
 */
 
#pragma once
#include  "CoreMinimal.h"
 
#include  "SquirrelRNG.generated.h"
 

UCLASS(BlueprintType)
class YASIUMATH_API USquirrel13_RNG : public UObject {
public:
    GENERATED_BODY()
 
    USquirrel13_RNG() {};
 
    USquirrel13_RNG( unsigned int seed )
        : m_seed(seed), init_seed(seed) {};
 
    USquirrel13_RNG( int position, unsigned int seed )
        : m_position(position), m_seed(seed), init_position(position), init_seed(seed) {};
 
    USquirrel13_RNG( int position, unsigned int seed, unsigned int variant )
        : m_position(position), m_seed(seed), m_variant(variant), init_position(position), init_seed(seed) {};
 
protected:
    UPROPERTY()
    int m_position{0};
 
    UPROPERTY()
    unsigned int m_seed{1};
 
    UPROPERTY()
    int m_variant{0};
 
    UPROPERTY()
    unsigned int init_position = 0;
 
    // UPROPERTY(BlueprintReadWrite)
    int32 init_seed = 0;
 
public:
    UFUNCTION(BlueprintCallable, Category="RNG")
    void InitBP( int seed, int position = 0 );

    uint32_t get_current_random() const;

    uint32_t get_random();

    UFUNCTION(BlueprintCallable, Category="RNG")
    int GetNextInt( int min, int max );

    UFUNCTION(BlueprintCallable, Category="RNG")
    int GetCurrentInt( int min, int max ) const;

    UFUNCTION(BlueprintCallable, Category="RNG")
    double GetNextDouble();

    UFUNCTION(BlueprintCallable, Category="RNG")
    double GetCurrentDouble() const;

    UFUNCTION(BlueprintCallable, Category="RNG")
    void SetPosition( int new_position );
    
    UFUNCTION(BlueprintCallable, Category="RNG")
    void IncrementPosition( int offset=1 );

    UFUNCTION(BlueprintCallable, Category="RNG")
    void SetSeed( int new_seed );
    
    UFUNCTION(BlueprintCallable, Category="RNG")
    void SetNoiseVariant( int newVariant=0 );

    UFUNCTION(BlueprintCallable, Category="RNG")
    void ResetSeedPos();
 
    static uint32_t RNG_0( int position, unsigned int seed );
 
    static uint32_t RNG_1( int position, unsigned int seed );
 
    static uint32_t RNG_2( int position, unsigned int seed );
 
    static uint32_t RNG_3( int position, unsigned int seed );

    virtual void Serialize( FArchive& Ar ) override;
};