I'm currently trying to develop a Tetris-like game in OpenGL. I did a block(1 square) falling down the screen and stop at the bottom. I've done the basic controls(move side,speed up with down key and rotate with up key). I looked at some free code over the net and see that many people use a textfile to define the blocks. I want to know how to display the block that match the file... ex : 0000 0110 0110 0000 will display a square. I know how to draw blocks with the glBegin(GL_QUADS) func and I know how to read a text file but don't have an idea how to display four blocks at the time in a position define in a textfile. Any suggestions ? [edited by - Evol970 on November 28, 2002 10:22:33 AM]

Use an algorithm saying that a number value of say, 1 is equal to a certain color (Could have it random). And all of the 2''s equal to another color. And have only one number for your background (probably 0). Just a suggestion.

tcache
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Formerly known as Wachar <- Thrander <- Tazel

yeah I already did that but what I mean is how

0100
0100
0100
0100 will display |

0000
1111
0000
0000 will display -

0010
0010
0010
0010 will display |

0000
0000
1111 will display -
0000

this as no mathers with color but with shape

It would be easier to have all your block types pre-defined (there aren''t too much in a tetris game), number them and select them by reading a single value from your textfile.
You current approach demands you have to build up the geometry manually, which is more tedious to do.

Load the data into a 4 by 4 array of bool''s (or ints if you want varying colour). Then, when you want to display a block, loop through each row and column in the array, and if it''s set to true, draw a quad (with an offset based on the position of the block, and the row and column).

Hope that helps,

John B