How to draw a grid using co-ordinate increments.

[nikoudov]

How to draw a grid using simple co-ordinate increments.

This might sound like foolish help, but most of the people I know are unaware of the simplicity. Note: You do NOT have to make any "arrays" or how ever.

Here is the turing code, the comments in the code will explain how everything works.

Turing:

% Nik Udovitskiy % 01.15.07 % Grid.t % Demonstrates the simple way to draw a grid using co-ordinate increments. % Sets Screen. setscreen ("graphics:520;550") % Co-ordinate variables. var a, a2, b, b2 : int := 0 % The variables used for the centre of the execution window in the "x" & "y" co-ordinates. const centerx := maxx div 2 const centery := maxy div 2 % Procedure statement that draws the grid. procedure DrawGrid     % Draws rectangles vertically.     a := centerx - 256     a2 := centerx - 226     b := centery - 210     b2 := centery - 180     for i : 1 .. 14         a := a + 30         a2 := a2 + 30         drawbox (a, centery - 210, a2, centery + 210, black)     end for     % Draws rectangles horizontally.     a := centerx - 224     a2 := centerx - 194     b := centery - 240     b2 := centery - 210     for i : 1 .. 14         b := b + 30         b2 := b2 + 30         drawbox (centerx - 226, b, centerx + 226, b2, black)     end for end DrawGrid DrawGrid

Now, after experimenting wiht this, you'll see the simplicity.

Cervantes added syntax tags