我不知道如何限制呼叫函式之間的時間-有解無憂

  
//let screenWidth = window.screen.width;
//let screenHeight = window.screen.height;
let screenWidth = 800;
let screenHeight = 600;
let assets = {};
let frames = 60;

let score = 0;
let lives = 3;
let player;
// let enemie;
//let enemies;
let bullet;
//let bullets;
let powerup = 0;
let gameOver = true;

function drawScoreBoard() {
  textSize(20);
  fill('white');
  text(`Score: ${score} / Lives: ${lives}`, 20, 40);
}

function preload() {
  assets.player = loadImage('assets/Player.png');
  assets.enemie = loadImage('assets/Enemie.png');
  assets.bulletRight = loadImage('assets/Bullet_Right.png');
  assets.bulletLeft = loadImage('assets/Bullet_Left.png');
  assets.bulletUp = loadImage('assets/Bullet_Up.png');
  assets.bulletDown = loadImage('assets/Bullet_Down.png');
}

function setup() {
  bullets = createGroup();
  enemies = createGroup();
  assets.player.resize(30, 30);
  assets.enemie.resize(30, 30);
  assets.bulletRight.resize(30, 30);
  assets.bulletLeft.resize(30, 30);
  assets.bulletUp.resize(30, 30);
  assets.bulletDown.resize(30, 30);
  createCanvas(screenWidth, screenHeight);
}

function createBullet(){
    let numList = [0, 90, 180, 270, 360];
    let bulletDirection = [assets.bulletLeft, assets.bulletUp, assets.bulletRight, assets.bulletDown];
    let randomdirection = numList[Math.floor(Math.random() * numList.length)];
    let bullet = createSprite(bulletDirection[(Math.round(player.getDirection()/90))]);
    
    enemie.centerX = random(0, screenWidth);
    enemie.setSpeed(random(1,10));
    enemie.setDirection(randomdirection);
    enemie.setCollider("circle");

    bullets.add(bullet);
}

function createPlayer(){
  player = createSprite(assets.player);
  player.bottom = screenHeight - 20;
  player.centerX = screenWidth / 2;
}


function shoot(amountofbulletstobeshot) {
  let bulletDirection = [assets.bulletLeft, assets.bulletUp, assets.bulletRight, assets.bulletDown];
  let bullet = createSprite(bulletDirection[Math.abs(((Math.round(player.getDirection()/90))))]);
  bullets.add(bullet);
//  bullet.direction = player.direction;
  bullet.centerX = player.centerX;
  bullet.centerY = player.centerY;
  bullet.setVelocity(11, player.getDirection());

//  console.log('The players current direction right now is:  '   player.getDirection());

}
function shooting() {
  if (keyIsDown(KEY.SPACE)) {
    if (powerup === 1) {
      shoot(3);
    }
    else {
      shoot(1);
    }
  }
    if (bullet) {
      if (bullet.centerX[1] === screenWidth) {
        bullets.remove(bullet);
    }
  }
}

function updateplayer() {
  //movement
  if (keyIsDown) {
    if (keyIsDown(KEY.RIGHT_ARROW)) {
      player.setVelocity(6, 0);
    }
    if (keyIsDown(KEY.LEFT_ARROW)) {
      player.setVelocity(6, 180);
    }
    if (keyIsDown(KEY.UP_ARROW)) {
      player.setVelocity(6, 270);
    }
    if (keyIsDown(KEY.DOWN_ARROW)) {
      player.setVelocity(6, 90);
    }
  }

  //dont go offscreen
  if (player.left < 0) {
    player.left = 0;
  }
  if (player.right > screenWidth) {
    player.right = screenWidth;
  }
  if (player.top < 0) {
    player.top = 0;
  }
  if (player.bottom > screenHeight) {
    player.bottom = screenHeight;
  }
  enemies.overlap(player, HandlePlayerEnemieCollision);
  //end up updateplayer
}
function updateEnemie() {
if (frameCount % 1 === 0) {
    let directions = ["LEFT", "RIGHT", "UP", "DOWN"];
    let direction = random(directions);
    if (direction === "LEFT" && enemie.left > 0) {
      enemie.centerX -= 5;
    }
    if (direction === "RIGHT" && enemie.right < screenWidth) {
      enemie.centerX  = 5;
    }
    if (direction === "UP" && enemie.top > 0) {
      enemie.centerY -= 5;
    }
    if (direction === "DOWN" && enemie.bottom < screenHeight) {
      enemie.centerY  = 5;
    }

}
}

function createEnemie() {
  let directions = [270, 180, 0, 90];
  direction = directions[(Math.floor(Math.random() * 5))];
  enemies.overlap(bullets, HandleEnemieBulletCollision);
  if (frameCount % 60 === 0) {
  enemie = createSprite(assets.enemie);
    enemie.centerX = Math.floor(Math.random() * 300)   100;
    enemie.centerY = Math.floor(Math.random() * 300)   100;
    enemie.setVelocity(Math.floor(Math.random() * 5)   1, direction);
    enemies.add(enemie);
  }
}

function HandleEnemieEdgeCollision(enemie, edge) {
  if (enemie.centerY === screenWidth) {
    enemie.remove();
  }
}

function HandleEnemieBulletCollision(enemie, bullet) {
   enemie.remove();
   bullet.remove();
   score  ;
}

function HandlePlayerEnemieCollision(player, enemie) {
  enemie.remove();
  player.remove();
  lives--;
  if (lives === 0) {
        gameOver = true;
    }
  createPlayer();
}

/*
function updateEnemie() {
  player.setVelocity(7, player.direction);
}
*/

function cheat() {
  score = (score   1000000);
  lives = (lives   1000000);
  cheats = 'on';
  if (cheats === 'on') {
    textSize(50);
    fill('yellow');
    text('CHEATS ACTIVATED', 400, 300);
  }
}

/*
function sleep(milliseconds) {
  var start = new Date().getTime();
  for (var i = 0; i < 1e7; i  ) {
    if ((new Date().getTime() - start) > milliseconds) {
      break;
    }
  }
}
*/


function drawGameOverScreen() {
    background("black");
    textAlign(CENTER);
    fill("white");
    textSize(40);
    text("WELCOME", screenWidth/2, screenHeight/2);
    textSize(20);
    text("Press SPACE to play!", screenWidth/2, screenHeight/2   100);

    if (keyWentDown(KEY.SPACE)){
        resetGame();
        gameOver = false;
    }
}

function resetGame(){
    score = 0; 
    lives = 3;

    createPlayer();
}

function drawGame() {
   background('lightgreen');
  drawScoreBoard();
  updateplayer();
  drawSprites();
  shooting();
//  updateEnemie();
  createEnemie();  
}

function draw() {
  
  if (gameOver === true) {
        drawGameOverScreen();
    } else {
        drawGame();
    }
}

有我的代碼，我想添加一個時間限制，以限制你可以再次射擊需要多少秒，現在你可以發送垃圾郵件并讓所有子彈直線前進我需要等待才能讓玩家再拍，謝謝！這將有助于分配，我需要在盡可能短的時間內完成。

uj5u.com熱心網友回復：

使用標志了解何時啟用和禁用拍攝。每次射擊后禁用射擊能力。然后使用 asetTimeout在一定時間后啟用拍攝。

let shootingEnabled = true;

function tempDisableShooting(duration) {
  shootingEnabled = false;

  setTimeout(() => {
    shootingEnabled = true;
  }, duration);
}

function shooting() {
  if (shootingEnabled && keyIsDown(KEY.SPACE)) {
    if (powerup === 1) {
      shoot(3);
    } else {
      shoot(1);
    }

    tempDisableShooting(1000); // Disable shooting for 1 second.
  }

  if (bullet) {
    if (bullet.centerX[1] === screenWidth) {
      bullets.remove(bullet);
    }
  }
}

uj5u.com熱心網友回復：

添加屬性以跟蹤拍攝的禁用狀態和延遲時間的常量（以毫秒為單位）。

let shootDisabled = false;
const shootDelayMS = 300;

將您的拍攝功能更新為僅拍攝 if shootDisabled == false，在每次拍攝后更新shootDisabledto true，并觸發 a在再次設定之前setTimeout等待shootDelayMS毫秒。shootDisabledfalse

function shoot(amountofbulletstobeshot) {
  if (shootDisabled == false) {
    let bulletDirection = [assets.bulletLeft, assets.bulletUp, assets.bulletRight, assets.bulletDown];
    let bullet = createSprite(bulletDirection[Math.abs(((Math.round(player.getDirection()/90))))]);
    bullets.add(bullet);
    bullet.centerX = player.centerX;
    bullet.centerY = player.centerY;
    bullet.setVelocity(11, player.getDirection());

    shootDisabled = true;
    setTimeout(() => shootDisabled = false, shootDelayMS );
  }
}

uj5u.com熱心網友回復：

一種方法是將資料保存在兩個變數中：is_shooting、shot_reset。

if(is_shooting){
    if(shot_reset>=x){ //x is frame count till able to shoot again)
        shot_reset==0;
        is_shooting=false;
    }else{
        shot_reset  
    }

}

轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/476808.html

標籤：javascript

上一篇：如何包含更多變數以顯示和隱藏圖示

下一篇：ReactDomRoutes未按預期作業，更改路徑但頁面上沒有任何內容