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NeutronX

Thu Nov 08, 2007 4:01 pm


How to move and shoot at the same time

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I am making a game that required a car to shoot rockets but I want it to drive at the same time and not just stop. How can I move and shoot at the same time?

Here's the code:


var bullety : int 
var bulletx : int 
bulletx := 00 
bullety := 200 
var bullet : int 
var chars : array char of boolean 
var x, y, x1, y1 : int 
var Shooting : boolean := false 

x := 00 
y := 200 

View.Set ("offscreenonly")
    var pic1 : int := Pic.FileNew ("bullet.bmp")
    var sprite1 : int := Sprite.New (pic1)
    var pic2 : int := Pic.FileNew ("coolcar2.bmp")
    var sprite2 : int := Sprite.New (pic2)

loop 
    Sprite.Show(sprite2)
    Sprite.SetPosition (sprite2, x, y,true) 
   
    Input.KeyDown (chars) 

    if chars (KEY_RIGHT_ARROW) then 
        x := x + 5 
        bulletx := bulletx + 5 
        if x > maxx then
            x := x- 5 
            bulletx := bulletx - 5 
        end if 
    end if 
    if chars (KEY_LEFT_ARROW) or chars ('s') then 
        x := x - 5 
        bulletx := bulletx - 5 
        if x < 0 then 
            x := x + 5 
            bulletx := bulletx + 5 
        end if 
        
    end if 
 
      if chars (' ') then 
        for i: x .. 690 by 10            
        Sprite.Show (sprite1)
        Sprite.SetPosition (sprite1, i, y, true)
        
        delay (1)
        View.Update
        Sprite.Show(sprite2)
        Sprite.SetPosition (sprite2, x, y,true)   
            end for
        end if 

        if bulletx > 640 then 
            Shooting := false 
            bulletx := -20
        end if  
    
    View.Update
end loop


Edited by Clayton: I'm about to give up on this... but... USE CODE TAGS!!





PLZ HELP!


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HeavenAgain

Thu Nov 08, 2007 4:07 pm


RE:How to move and shoot at the same time

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you'll better edit this code before a mod comes here and go crazy again (they are on a roll these days ;)), use code tag![code]blah blah blah[/code]

and i think this have something to do with and s is pressed, that if statement should be and instead of or


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LaZ3R

Thu Nov 08, 2007 5:29 pm


RE:How to move and shoot at the same time

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Your code needs some revamping...

You currently have it so that the player has to HOLD arrow keys to control the location of a bullet.

If I hold RIGHT ARROW for 2 seconds and let go, the bullet will stop moving. 

You also for some reason have it setup so that you are always on the location of the bullet because if I hold right, the x cord of the bullet will increase by 5 but so will the location of the car in this case.

What you should do is go through your code line by line and make sure what you want it to do makes sense.


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Zampano

Thu Nov 08, 2007 6:17 pm


Re: How to move and shoot at the same time

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Use processes!
You probably have heard of procedures; processes are the same except they run at the same time as other processes. This would allow you to have a process for shooting and another for driving run concurrently. Look in on processes in F10.


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Saad

Thu Nov 08, 2007 6:58 pm


RE:How to move and shoot at the same time

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I suggest you not use processes and look into Input.KeyDown, processes are not usefull is this situation


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Zampano

Thu Nov 08, 2007 8:04 pm


Re: How to move and shoot at the same time

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You know better than I the best method. If there is an efficient way to do it with just Input.KeyDown (more complex visuals are difficult in a loop that relies on the activation of an if) then you should do that instead of using processes.
Processes may be convenient sometimes, but they are troublesome even more often . . .