forked from: 簡易AI + SnakeGame
Snake Game とりあえず100行以内で書きたかった。
おバカなAI追加
/**
* Copyright cpu_t ( http://wonderfl.net/user/cpu_t )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/msVc
*/
// forked from bkzen's 簡易AI + SnakeGame
// forked from bkzen's SnakeGame
package
{
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.KeyboardEvent;
import flash.geom.Rectangle;
/**
* Snake Game とりあえず100行以内で書きたかった。
* おバカなAI追加
*/
[SWF (backgroundColor = "0xFFFFFF", frameRate = "60", width = "465", height = "465")]
public class SnakeGame extends Sprite
{
// bmp, bmd 描画されるところ。
private var bmp: Bitmap, bmd: BitmapData;
// key は今から進もうと思っている方向, way は今進んでいる方向。
private var key: uint, way: uint;
// snake は ヘビの配列、[0] が先頭。 point はヘビが取っていくドット。
private var snake: Array, point: Snake;
// 描画領域
private var viewRect: Rectangle;
// speedK は スピード調整用の係数。 1 ～ N (小さいほど早い)、 speedC は wait 用のカウンタ(いじる必要なす)、 snakeLength は ヘビの長さ。(1～)
private var speedK: int = 10, speedC: int = 0, snakeLength: int = 1;
public function SnakeGame()
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e: Event = null): void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
//
addChild(bmp = new Bitmap(bmd = new BitmapData(stageW, stageW, false, 0)));
bmp.scaleX = bmp.scaleY = cellSize;
bmd.fillRect(viewRect = new Rectangle(1, 1, stageW2, stageW2), 0xFFFFFF);
snake = [new Snake(stageW >> 1, stageW >> 1)], point = new Snake();
//stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDown); // AI を作るときはこの行をコメントアウト。
addEventListener(Event.ENTER_FRAME, loop);
}
/**
* ココを書いたりする。
*/
private function ai(): void
{
var s: Snake = snake[0], b: Boolean, dx: int, dy: int, w: int;
if (bway != way) bway = way, aiCnt++;
dx = point.x - s.x;
dy = point.y - s.y;
b = false;
if (checkWayPlus(0, -1) && changeWay(UP)) b = true;
else if (checkWayPlus(0, 1) && changeWay(DOWN)) b = true;
else if (checkWayPlus( -1, 0) && changeWay(LEFT)) b = true;
else if (checkWayPlus(1, 0) && changeWay(RIGHT)) b = true;
if (dx == 0 || (Math.abs(dy / dx) > 1))
{
w = dy < 0 ? UP:DOWN;
if (checkWayPlus(0, w == UP ? -1:1)) changeWay(w);
}
else
{
w = dx < 0 ? LEFT:RIGHT;
if (checkWayPlus(w == LEFT ? -1:1, 0)) changeWay(w);
}
if (!b)
{
w = aiCnt % 3;
if (w < 1)
{
if (!b && checkWay( 0, - 1)) b = changeWay(UP);
if (!b && checkWay( 0, 1)) b = changeWay(DOWN);
if (!b && checkWay( - 1, 0)) b = changeWay(LEFT);
if (!b && checkWay( 1, 0)) b = changeWay(RIGHT);
}
else if (w < 2)
{
if (!b && checkWay( 1, 0)) b = changeWay(RIGHT);
if (!b && checkWay( 0, 1)) b = changeWay(DOWN);
if (!b && checkWay( 0, - 1)) b = changeWay(UP);
if (!b && checkWay( - 1, 0)) b = changeWay(LEFT);
}
else
{
if (!b && checkWay( - 1, 0)) b = changeWay(LEFT);
if (!b && checkWay( 1, 0)) b = changeWay(RIGHT);
if (!b && checkWay( 0, 1)) b = changeWay(DOWN);
if (!b && checkWay( 0, - 1)) b = changeWay(UP);
}
}
if (Math.abs(dx) + Math.abs(dy) <= 1) changeWay(w);
}
private function checkWayPlus(dx:int, dy:int):Boolean
{
var cnt:int = 0;
if (dx == 0) {
if (checkWay(dx - 1, dy)) cnt++;
if (checkWay(dx + 1, dy)) cnt++;
}
if (dy == 0) {
if (checkWay(dx, dy - 1)) cnt++;
if (checkWay(dx, dy + 1)) cnt++;
}
return checkWay(dx, dy) && (cnt != 0);
}
private var bway: uint, aiCnt: int;
private function checkWay(dx: int, dy: int): Boolean
{
var s: Snake = snake[0], c: uint;
if ((c = bmd.getPixel(s.x + dx, s.y + dy)) == 0/* || c == 0xFF0001*/) return false;
return true;
}
private function onKeyDown(e: KeyboardEvent ): void { changeWay(e.keyCode); }
/**
* 方向変更
* @param keyCode
* @return <Boolean> : 方向変更可能だったら true
*/
private function changeWay(keyCode: uint): Boolean
{
var b: Boolean;
switch (keyCode)
{
case UP: if (b = (way != 1 << 1)) key = 1 << 0; break;
case DOWN: if (b = (way != 1 << 0)) key = 1 << 1; break;
case LEFT: if (b = (way != 1 << 3)) key = 1 << 2; break;
case RIGHT: if (b = (way != 1 << 2)) key = 1 << 3; break;
}
return b;
}
private function loop(e: Event ): void
{
if (speedC++ % speedK == 0)
{
way = key;
var s: Snake = snake[0], i: int, c: uint, tx: int, ty: int, vx: int = key & 12 ? (key >> 1) - 3 : 0, vy: int = key & 3 ? (key << 1) - 3 : 0
bmd.lock();
if ((c = bmd.getPixel(s.x + vx, s.y + vy)) == 0) { removeEventListener(Event.ENTER_FRAME, loop); return; }
else if (c == 0xFF0000) snakeLength = snake.push(point), point = new Snake(), speedK = speedK < 2 ? 1 : speedK - 1;
bmd.fillRect(viewRect, 0xFFFFFF);
tx = s.x, ty = s.y;
bmd.setPixel(s.x += vx, s.y += vy, 1);
for (i = 1; i < snakeLength; i++)
{
s = snake[i];
vx = s.x, vy = s.y;
bmd.setPixel(s.x = tx, s.y = ty, 0);
tx = vx, ty = vy;
}
c = bmd.getPixel(point.x, point.y);
bmd.setPixel(point.x, point.y, c == 0xFFFFFF ? 0xFF0000 : 0xFF0001);
bmd.unlock();
ai();
}
}
}
}
const stageW: int = 31; // stage のサイズ
const stageW2: int = stageW - 2; // stage のサイズから、枠を除いた数
const cellSize: int = 15; // 一つ一つのセルのサイズ (px)
const UP: uint = 38; // AI が changeWay する時用の 上 Key のキーコード
const DOWN: uint = 40; // AI が changeWay する時用の 下 Key のキーコード
const LEFT: uint = 37; // AI が changeWay する時用の 左 Key のキーコード
const RIGHT: uint = 39; // AI が changeWay する時用の 右 Key のキーコード
class Snake
{
public var x: int, y: int;
function Snake(x_: int = 0, y_: int = 0)
{
x = x_ || Math.random() * stageW2 + 1, y = y_ || Math.random() * stageW2 + 1;
}
}