Designquestion Spinning Card

[Raincode]

Hello dear community,

EDIT: Current solution: Using 1-Dimensional vector. Not sure if it will work all the way through. Maybe should have put more time into library specific design.

I saw the spinning card in the projects forum a while back. Now I have to make a memory game, and I immediately thoght about it, and how cool it would be to use it.

I altered the example and achieved an effec exactly what I want it to look like (with a single card, in a single main function).

However, it becomes much more difficult in an object oriented environment:

I have created a class that uses the spinning card classes "Card". (I also used this in my minimal example).
It manages the 2 spinning cards/sprites and provides a 'flip' and 'update' function and also inherits sf::Drawable.

In my Game class I wanted an array<array<Card, 4>, 6>, representing the memory cards. My Problem: There is no suitable default constructor for Card, because there is none for SpinningCard either. So, the compiler complains, and gives an Error C2512:

error C2512: 'std::array<std::array<Card,4>,6>' : no appropriate default constructor available

I don't know how to solve this Problem. I simply can't initialize the cards before loading the sprites and setting their position.

I hope somebody can give me some tips on how to change my design to make it work.

Raincode

[eXpl0it3r]

EDIT: Current solution: Using 1-Dimensional vector. Not sure if it will work all the way through. Maybe should have put more time into library specific design.

That's the best way to do it. Multi dimensional arrays are not recommended with C-arrays, nor std::array, nor std::vector.
Use a std::vector and calculate the "multiple" dimensions from the indices itself.

[Raincode]

Hey eXpl0it3r,

thanks very much for your reply. The fact that SFML provides a "contains()" function really made it easier for me and allowed me to easily use a 1D vector simply storing the elements.

Raincode

[Hapax]

Hi again, Raincode.

I did post this is in the actual Spinning Card thread too but just so that this thread has the information, here it is again:

Spinning Card wasn't designed to be used as an actual object itself (that is copied, moved, compared, sorted etc.) but rather an animation object that temporarily replaces a standard sprite (the card) during the spin animation and then re-replaced by the sprite (the card - most likely, the other side). This way, if you only spin one card at a time, you only require one instance of SpinningCard, and it only needs to exist for the duration of the spin animation.

This would mean that you only need to have a container of sprites and a "handful" of SpinningCards, depending on how many cards you need to be spinning at once. It could be just one or many but they can be destroyed when the spin animation is over, where you would start displaying the original sprite again with its texture altered to show the side required.