Note: Input.KeyDown does NOT work with turing v3 (or lower... you should not be using anything lower anyway). Try to get yours hands on a v4 compiler. Bitch at your teacher for having a crappy version or something
By demand, I'm posting a tutorial on how to give the user a control over a character in the game.
Here's the theory behind it... user presses the button, you check what button is pressed and react accordingly... Well here's the code to start us off:
| code: |
var x,y : int
x:=100 y:=100 var chars : array char of boolean loop Input.KeyDown (chars) if chars (KEY_UP_ARROW) then y:=y+5 end if if chars (KEY_RIGHT_ARROW) then x:=x+5 end if if chars (KEY_LEFT_ARROW) then x:=x-5 end if if chars (KEY_DOWN_ARROW) then y:=y-5 end if drawoval(x,y,4,4,red) delay(10) cls end loop |
code works already... you can control a small red circle around the screen with arrow buttons. Come on, try it out... I'll wait.
Now to understand how this code works. X and Y are variables to store the current location of the circle. Each is assigned a value of 100 to declear initial position... You can change that to anything.
var chars : array char of boolean this declears an array of characters with boolean values... don't ask me how or what about it... its like an API, you just don't ask... We need this line and thats final.
then we start a loop... so that you can move your circle(square, triangle, 3D spacefighter, etc) more then once.
here's another turing API, Input.KeyDown (chars) This function stores all the buttons pressed at the moment on the keyboard in the array called chars which we decleared few lines before. Using this instead of getch() allows us for multiple button input, so we can move diagnoly
Next are the IF statments... Gous like this If chars(BUTTON) then do whatever
and yes, KEY_UP_ARROW is a real button name, though you can use letters and ASCII values too.
Having 4 separate if statments allows us to check for all 4 buttons and execute them all, not just the first one we find. Using IF-ELSEIF structure will allow to use only 1 button and the first one found will be executed, nothing else.
Finally we draw our circle with new coordinates, run a little delay (to slow down the process) and clear the screen so we don't have garbage all over it.
And we're DONE! You've got a nice little red circle that a user can control!!!
BONUS: Lets go one step further, try adding additional control to the circle... say if you press "ENTER" if will do something special. Like change color or size of w/e.
and if you have the Turing textbook (which covers next to nothing ;p) its in there.... and if you looked up you would've seen in the examples, "chr(ORD_SPACE)" and enter is just enter i believe...? 
