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upthescale

Thu May 04, 2006 2:45 pm


Snake Help

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You know when you hit a key and the snake wil move...well for me the snake only moves when i hit the key, how can i do it so when i key an arrow key, he will go...because he only goes when i hold down!


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Clayton

Thu May 04, 2006 3:03 pm



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think about it, if it is going to move continuously without input, what do you need? a loop. have an if condition then go into the loop. simple


var keys:array char of boolean
loop
    Input.KeyDown(keys)
    if keys(%whatever arrow) then
        loop
            %make coordinate changes in the loop(continuous without input)
        end if
        exit when hasch
end loop



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upthescale

Thu May 04, 2006 3:05 pm



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my box doesn't even move now that it is in a loop!!!


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upthescale

Thu May 04, 2006 3:09 pm



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ok it werks,,, thanks man +5 bits!!!!


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Clayton

Thu May 04, 2006 3:14 pm



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var keys : array char of boolean
View.Set ("graphics,offscreenonly")
var x, y : int := 0
const size : int := 20
y := maxy - size
loop
    Input.KeyDown (keys)
    if keys (KEY_DOWN_ARROW) then
        loop
            y -= 1
            Draw.Cls
            Draw.FillBox (x, y, x + size, y + size, black)
            View.Update
            delay (200)
            exit when hasch
        end loop
    end if
end loop



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Delos

Thu May 04, 2006 3:17 pm



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var keys:array char of boolean
loop
    Input.KeyDown(keys)
    if keys(%whatever arrow) then
        loop
            %make coordinate changes in the loop(continuous without input)
        end if
        exit when hasch
end loop


A nested loop eh?  Not a bad idea, and functional.  However, using this approach you'll be left with 4 instances of such loops within your main loop.  This might just me being picky, but I would far prefer to use a vectors-and-components approch.
Simply break down your snake movement into its components (in this case very, very simple).  If the left button is pressed, the movement components would become (-1, 0); this can then be used in the main loop to change the position of the snake.
And yes, you would end up with 4 instances of these assignments - but this just strikes me as a simpler route to creating the constant motion here.


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Clayton

Thu May 04, 2006 3:41 pm



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i was thinking more of a procedural approach where you could get the input and pass that to a procedure and run the loop, i just did that to show him the concept of what to do really