// ActionScript file
package de.fhg.igd.daniel{
import
flash.display.Sprite;
import
flash.events.KeyboardEvent;
import
flash.events.TimerEvent;
import
flash.ui.Keyboard;
import
flash.utils.Timer;
import spark.components.Group;
[SWF(width='430', height='430', frameRate='30')]
public class Bla extends Sprite {
private const SPEED : uint = 60;//lower = faster
private const DIM : int = 15; //keep this number uneven to have the snake starting in the middle
private const INITIAL_SIZE : int = 3; //keep this lower then DIM/2
private var left : Boolean;
private var right : Boolean;
private var up : Boolean;
private var down : Boolean;
private var size : Number;
private var food : Sprite;
private var tmr : Timer;
private var curI : Number;
private var curJ : Number;
private var snake : Array;
private var grid : Array;
public function Snake(){
size = stage.stageWidth / DIM;
curI = curJ = Math.floor(DIM * 0.5);
initSnake();
fillGrid();
placeFood();
tmr = new Timer(SPEED);
tmr.addEventListener(TimerEvent.TIMER, move);
tmr.start();
stage.addEventListener(KeyboardEvent.KEY_DOWN,chan geDir);
}
private function fillGrid():void{
grid = Make2DArray();
for (var i:uint = 0; i < DIM; i++){
for (var j:uint = 0; j < DIM; j++){
var sp:Sprite = new Sprite();
sp.graphics.beginFill(0xF0F0F0);
sp.graphics.lineStyle(1,0xF5F5F5);
sp.graphics.drawRect(0, 0, size - 1, size - 1);
sp.x = i * size;
sp.y = j * size;
addChild(sp);
grid[i][j] = sp;
}
}
}
private function Make2DArray():Array{
var a:Array = new Array(DIM);
for(var i:uint = 0; i < a.length; i++){
a[i] = new Array(DIM);
}
return a;
}
private function initSnake():void{
var center:Number = Math.floor(DIM * 0.5) * size;
snake = new Array(INITIAL_SIZE);
for (var i:uint = 0; i < INITIAL_SIZE; i++){
var sp:Sprite = makeItem();
sp.x = center;
sp.y = center + i * size;
addChild(sp);
snake[i] = sp;
}
snake.reverse();
}
private function makeItem(c:uint = 0):Sprite{
var s:Sprite = new Sprite();
s.graphics.beginFill(c);
s.graphics.lineStyle(2,0x333333);
s.graphics.drawRect(0, 0, size, size);
return s;
}
private function placeFood():void{
var rndI:uint = Math.floor(Math.random() * DIM);
var rndJ:uint = Math.floor(Math.random() * DIM);
var rndX:Number = grid[rndI][rndJ].x;
var rndY:Number = grid[rndI][rndJ].y;
if (food != null) removeChild(food);
food = makeItem(Math.random() * 0xFFFFFF);// random color
food.x = rndX;
food.y = rndY;
addChild(food);
//redo if the food is on the snake itself
for (var i:uint = 0; i < snake.length; i++){
if (rndY == snake[i].y && rndX == snake[i].x){
placeFood();
}
}
}
private function move(e:TimerEvent):void{
if (left){
curI -= 1;
}else if (right){
curI += 1;
}
if (up){
curJ -= 1;
}else if (down){
curJ += 1;
}
if (left || right || up || down){
var s:Sprite = makeItem();
if (curI > DIM - 1) curI = 0;
if (curJ > DIM - 1) curJ = 0;
if (curI < 0) curI = DIM - 1;
if (curJ < 0) curJ = DIM - 1;
s.x = grid[curI][curJ].x;
s.y = grid[curI][curJ].y;
addChild(s);
snake.push(s);
if (Math.floor(s.x) == Math.floor(food.x) && Math.floor(s.y) == Math.floor(food.y) ){
placeFood();
} else {
removeChild(snake[0]);
snake.shift();
}
}
}
private function changeDir(e:KeyboardEvent):void{
if(e.keyCode == Keyboard.LEFT) {if (!right){left = true; up = false; down = false; right = false;}}
if(e.keyCode == Keyboard.UP) {if (!down) {left = false; up = true; down = false; right = false;}}
if(e.keyCode == Keyboard.RIGHT) {if (!left) {left = false; up = false; down = false; right = true;}}
if(e.keyCode == Keyboard.DOWN) {if (!up) {left = false; up = false; down = true; right = false;}}
}
}
}
Problem mit Flash builder 4 und Actionskript 3.0
YiGG.de
