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Posts tagged Keys

Lines of sight – part 1

May11
2011 Leave a Comment Written by Eliott

Lines of sight can add authenticity to a game…

So, how does it work?

Firstly we need some sort of movement system:

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//Define key press automation
var keys:Array = new Array()
var key:Number = 0
var maxKeys = 100
for(key = 0; key < maxKeys; key++){
	keys[key] = false
}
 
//Variable definition
var speed = 4
 
//Add key listeners
stage.addEventListener(KeyboardEvent.KEY_DOWN,key_Down)
stage.addEventListener(KeyboardEvent.KEY_UP,key_Up)
stage.addEventListener(Event.ENTER_FRAME,enter_Frame)
 
//Add key functions
function key_Down(event:KeyboardEvent):void{
	keys[event.keyCode] = true
}
function key_Up(event:KeyboardEvent):void{
	keys[event.keyCode] = false
}
function enter_Frame(event:Event):void{
	move_Player()
}
function move_Player(){
	if(keys[37]){
		//Left
		Player.x -= speed
	}
	if(keys[38]){
		//Up
		Player.y -= speed
	}
	if(keys[39]){
		//Right
		Player.x += speed
	}
	if(keys[40]){
		//Down
		Player.y += speed
	}
}

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Posted in Actionscript, Flash, Tutorials - Tagged , ,

AS3 key press automation

Oct31
2010 Leave a Comment Written by Eliott

Automating key press in AS3

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var keys:Array = new Array()
var key:Number = 0
var maxKeys = 100
for(key = 0; key < maxKeys; key++){
	keys[key] = false
}
 
stage.addEventListener(KeyboardEvent.KEY_DOWN,key_Down)
stage.addEventListener(KeyboardEvent.KEY_UP,key_Up)
 
function key_Down(event:KeyboardEvent):void{
	keys[event.keyCode] = true
	checkKeys()
}
function key_Up(event:KeyboardEvent):void{
	keys[event.keyCode] = false
	checkKeys()
}
function checkKeys(){
	if(keys[70]){
		trace("YOU PRESSED F")
	}
	if(keys[74]){
		trace("YOU PRESSED J")
	}
}

Then after using the code from my previous as3 code tutorial to find the key codes you can use the above to detect key press without coding anymore variables. NOTE, if you are using a key code higher than 100 change maxKeys to accommodate that and also those lower do not need a large array.

Posted in Actionscript, Flash, Tutorials - Tagged ,

AS3 finding key codes

Oct15
2010 Leave a Comment Written by Eliott

I’ve given you an example – now to find em

I could give you a list – plain and simple. Nah let’s code it…

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stage.addEventListener(KeyboardEvent.KEY_DOWN,key_Down)
stage.addEventListener(KeyboardEvent.KEY_UP,key_Up)
 
function key_Down(event:KeyboardEvent):void{
    trace("Key Pressed: " + String.fromCharCode(event.charCode) + " (Key code: " + event.keyCode + " Character code: " + event.charCode + ")");
}
function key_Up(event:KeyboardEvent):void{
    trace("Key Released: " + String.fromCharCode(event.charCode) + " (Key code: " + event.keyCode + " Character code: " + event.charCode + ")");
}

Now we’re on the same lines!

Posted in Actionscript, Flash, Tutorials - Tagged

AS3 key press detection

Oct13
2010 Leave a Comment Written by Eliott

AS3, hmmm

AS3 is very different from AS2, the main difference being that all the functions are different and variables need to be pre-defined for use. The code I use is this:

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import flash.events.Event
 
var keyUP:Boolean = false
var keyDOWN:Boolean = false
var keyRIGHT:Boolean = false
var keyLEFT:Boolean = false
 
stage.addEventListener(KeyboardEvent.KEY_DOWN,key_Down)
stage.addEventListener(KeyboardEvent.KEY_UP,key_Up)
stage.addEventListener(Event.ENTER_FRAME,enter_Frame)
 
function key_Down(event:KeyboardEvent){
	switch (event.keyCode){
		case 37 :
			keyLEFT = true
			break;
		case 38 :
			keyUP = true
			break;
		case 39 :
			keyRIGHT = true
			break;
		case 40 :
			keyDOWN = true
			break;
	}
}
 
function key_Up(event:KeyboardEvent){
	switch (event.keyCode){
		case 37 :
			keyLEFT = false
			break;
		case 38 :
			keyUP = false
			break;
		case 39 :
			keyRIGHT = false
			break;
		case 40 :
			keyDOWN = false
			break;
	}
}
 
function enter_Frame(event:Event){
	if (keyUP){
		trace("up")
	}
	if (keyDOWN){
		trace("down")
	}
	if (keyLEFT){
		trace("left")
	}
	if (keyRIGHT){
		trace("right")
	}
}

replacing the trace events with whatever you want to happen and replacing the case values with those of other keys (as applicable).

Posted in Actionscript, Flash, Tutorials - Tagged

Key codes

Mar18
2010 Leave a Comment Written by Eliott

You probably will of noticed that in my PRG tutorial i only use the arrow keys, but we can use any button we want… It’s just a little more complex. Instead of Key.LEFT or Key.ENTER you have numbers… Here is the complete list…

Letters

A – 65
B – 66
C – 67
D – 68
E – 69
F – 70
G – 71
H – 72
I – 73
J – 74
K – 75
L – 76
M – 77
N – 78
O – 79
P – 80
Q – 81
R – 82
S – 83
T – 84
U – 85
V – 86
W – 87
X – 88
Y – 89
Z – 90

Numbers

0 – 48
1 – 49
2 – 50
3 – 51
4 – 52
5 – 53
6 – 54
7 – 56
8 – 57
9 – 58

Usage

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if(Key.isDown(87){
	trace("W is pressed")
}

Pretty simple really, tomorrow i will release my function which makes this easier.

Posted in Actionscript, Flash, Tutorials - Tagged

RPG game creation tutorial – part 5

Feb06
2010 Leave a Comment Written by Eliott
This entry is part 6 of 8 in the series RPG Game Creation Tutorial

Some time ago I published part 4, now i bring you part 5 :D . Basically we will learn how to create dynamic tiling, No biggie. To be honest it is a ‘complicated’ subject but hey. You got me :D

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So what is ‘dynamic tiling’ basically we’ll create a tile based engine where we just input some numbers in some arrays and it makes all the backgrounds and stuff.

First things then… Create a movieclip 25x25px with 3 frames, grass, path and water. Now right click it in the library and choose Export for actionscript then change the identifier to “Bricks”. Now, actionscript can read it.

Now the code… In the root timeline add

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n = 0

We will use this later to count the bricks and aid referencing.

Now all we need is the actual code…
READ MORE »

Posted in Actionscript, Flash, Tutorials - Tagged , , ,
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