Erm tetris question

NullPointer33 · 2003-10-22T16:14:46

Hello, I''m making a tetris game that is almost complete mostly everything works collisions, game logic etc, the problem I have is I don''t know how to rotate the pieces I have them in arrays like for example int L[5][5] = { -1, -1, 0, -1, -1, -1, -1, 0, -1, -1, -1, -1, 0, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, }; ...then I have another BIG array that represents the screen to where the pieces are drawn (I copy the information of the pieces there also) which looks like this int board[MAX_W][MAX_H]; but I can''t figure out how to rotate the pieces, thanks in advance for the help.

For Beginners

Started by NullPointer33 October 22, 2003 03:02 PM

10 comments, last by NullPointer33 20 years, 6 months ago

Peon

276

October 22, 2003 04:06 PM

If you go element by element, it's pretty easy to figure out how to make a rotated version of an array, especially if you write out what you need to do on paper.

If I were writing Tetris right now, I would have a current block object, that had randomly been assigned a block configuration from the 7? "base type" blocks. To rotate, call CurrentBlock.rotate(DIRECTION). No real need to hardcode all the block type ROTATIONS. Makes it easier if you want to put some spin on your game and make new block shapes too.

I don't know how relevant this is, but whatever

[edited by - Peon on October 22, 2003 5:07:16 PM]

Peon

xg0blin

752

October 22, 2003 04:14 PM

quote:
If you go element by element, it''s pretty easy to figure out how to make a rotated version of an array, especially if you write out what you need to do on paper.

If I were writing Tetris right now, I would have a current block object, that had randomly been assigned a block configuration from the 7? "base type" blocks. To rotate, call CurrentBlock.rotate(DIRECTION). No real need to hardcode all the block type ROTATIONS. Makes it easier if you want to put some spin on your game and make new block shapes too.

I don''t know how relevant this is, but whatever

I did this approach on the first version I did. Of course, every time I wanted to do a rotation, I had to switch from my board coordinates, to the block coordinates, do the rotation, and then switch back to the board coordinates. I thought it was a whole lot cleaner to just do it all with the one big array, with indexes moving about.

Erm tetris question

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