Hi, I want to get some help for Card randomizing script

Hi, I want to make a prototype game of card game+ platformer.
I need to build a card randomizing script, I will use about 20~30 card in total
rule will be similar to the 7poker but I will use only 2 card and when character levels up it will be up to 5 cards.

I am just learning basic of Java scripting so, can anyone please help me to build this script?

 

Ah also I am trying to make a 2d style Game

 

For basic randomization, you can use Random.Range: http://docs.unity3d.com/ScriptReference/Random.Range.html
You could put your cards in a list or array and use Random.Range to pick out a card.

 

Hi, Thanks for the answer , I already know that I can use Random.Range but I don't know how to use it with game object or img or gui txture.

 

You could put them in an array, then use Random.Range to pick from them.
Something like this:

Code (JavaScript):

1. var cardObjects = new Array();
2.  
3. function GetRandomCard(cardList:Array)
4. {
5.     return Random.Range(0,cardList.length);
6. }

Here you'd assign your cards to the array either through script or in the inspector. So you'd call the GetRandomCard function when you wanted a random card, giving it the array of the card list you want.
As an example, this would let me store a random card in the newCard variable every time I pressed 'c'. Note that if I get another random card it overwrites the old one, so you'll likely want to do something with the random card before you get another:

Code (JavaScript):

1. function Update()
2. {
3.     if(Input.GetKeyDown("c"))
4.     {
5.         var newCard = GetRandomCard(cardObjects);
6.     }
7. }

Lastly, if you're list of cards you want to fetch from is always going to be the same length you'll want to use a builtin array, such as GameObject[] instead of Array(), using whatever builtin array is appropriate, of course.

If that isn't an option, you may need to convert your resulting random card before using it. If you were storing objects in the array, for example, something like this:

Code (JavaScript):

1. function Update()
2. {
3.     if(Input.GetKeyDown("c"))
4.     {
5.         var newCardObj = GetRandomCard(cardObjects);
6.         var newCard : GameObject = newCardObj;
7.     }
8. }

The reason for this is that the array stores it as a generic object, so you won't be able to use it quite the same way until converted.

Here's the scripting API for arrays, if you're interested in reading up more about them and how to use them:
http://docs.unity3d.com/ScriptReference/Array.html

 

Why don't you use a public array?
This is C#, but you should get the general gist. This is also how I do all my card games.
Note: this is using a full deck, hence the 0,26 randoms.

Code (CSharp):

1.  
2. public GameObject[] CardPrefabsRED; // Drag your cards into the 2 categories
3. public GameObject[] CardPrefabsBLK;  // This will name then CardPrefabColor[0][1][2][3][etc]
4. private GameObject CardPrefabSelected;
5. private int randomInt;
6.  
7. //Then randomly select card
8. randomInt = Random.Range(0,10);
9.         if(randomInt >= 5)
10.         {
11.                 CardPrefabSelected = CardPrefabsBLK[Random.Range(0,26)];
12.         }
13.         else if (randomInt < 5)
14.         {
15.                 CardPrefabSelected = CardPrefabsRED[Random.Range(0,26)];
16.         }
17.  
18.  

Or for one card deck

Code (CSharp):

1.  
2. public GameObject[] CardPrefabs; // Drag your cards into the category in inspector
3. private GameObject CardPrefabSelected;
4.  
5. //Then randomly select card
6. CardPrefabSelected = CardPrefabs[Random.Range(0,52)];
7.  

 

I think you should create prefabs that each have a sprite renderer, and maybe add a script to each that has information about the card, such as the color. C# was a little confusing to me when I started, too, if you need a Javascript example let me know.

 

If you need more information than just red or black I would suggest a script too, though that could be tedious to link to your main script.
If you only need black and red, then it would be simpler to just tag each card with it's color.

 

Keep in mind, with a randomize seed there is nothing that tells it too not randomize the same number twice.
So, if your trying to create a card deck you need to keep that in mind.


So, the logic of this would be.
Make a type list of all your cards.

I would build the type something like this.

DECK
Number, Value, AltValue, Suite

1,11,1,Hearts,ACE
2,11,1,Spades,ACE
3,10,0,Spades,KING

Ok, not going to build the whole list for you get the point..

Then, to build a list..
set new array of DECK

maxcards= 24;

do
{
x = RANDOM SEED
check = findrandomseedindeck(x)
if !check
{
add card to deck
}
} while (i < maxcards);

 

I forget what the algorithm is called, but what you do is iterate through each element of an array. For each element, get a random index of any element in the array. Then swap the places of the current element and the one randomly selected.

 

You literally said it cranky, That's a foreach loop

 

Nah, this is what I meant: https://en.wikipedia.org/wiki/Fisher–Yates_shuffle

What I said is slightly different than this though. Try the modern method.

 

Fill a list with your cards. random range 0 - list.Count - that's your card. remove that card from the list. rinse and repeat with no duplicates. when the list reaches 0 ( or how low you want it) flush what's left (list.clear() ) and refill the list with the fresh deck.