jQuery派生div和碰撞检测 [英] jQuery spawning div and collision detection

问题描述

所以我几乎在我的学校家庭作业项目结束时，只是失去了两个主要的东西，我似乎无法想出：

So im almost at the end of my school homework project im just missing two major things i can't seem to figure out:

1.如何产生管道障碍物具有用于间隙的随机位置，从而鸟可以飞过（使用改变管道分段的css'右侧attr用于间隙位置的功能），并且当管道离开屏幕底部时移除管道。 （它是一个颠倒的flappy鸟游戏喜欢btw ..）

1.How to spawn the pipe obstacles with a random position for the gap so the bird can fly through (tought of using a function which changes the css 'right' attr of the pipe div for the gap position), and removing the pipe when it goes off screen bottom . (Its a inverted flappy bird game like btw..)

2.第二，我需要帮助碰撞检测功能，所以我知道当游戏结束重要的艰难的原因，我想我可以找出后，解决了第一个问题）

2.Second i need a help with the collision detection function so i know when game is over (this is less important tough cause i think i can figure it out after ill solve the first problem)

$(document).ready(function(){
//Variables
var screenWidth = $(window).width();//Screen width
var screenHeight = $(window).height();//Screen height
var birdWidth = $("#bird").width();//bird width
var y = 0;//Background y position
var astY = 0;//Pipe position

var bird = {//bird properties
    goingLeft: false,
    goingRight: false,
    lspeed: 0,
    rspeed: 0,
    maxSpeed: 10
};

setBirdPosition(screenWidth/2 - birdWidth/2, screenHeight/1.3 - birdWidth/2);
startBackgroundMovement();
spawnPipe();


//Start move the screen
function startBackgroundMovement(){
    setInterval(function()
    {
        y+=1;
    $('body').css('background-position-y',y + 'px');
    }, 10);
}


//bird starting position
function setBirdPosition(posX, posY) {
    $("#bird").css("left", posX);
    $("#bird").css("top", posY);
    bird.position = posX;
}
 (function birdLoop() {
    if (bird.goingLeft) {
        bird.lspeed = Math.min(bird.lspeed *1.1 || 1, bird.maxSpeed);
    } else {
        bird.lspeed = Math.max(bird.lspeed - 0.5, 0);
    }
    if (bird.goingRight) {
        bird.rspeed = Math.min(bird.rspeed *1.1 || 1, bird.maxSpeed);
    } else {
        bird.rspeed = Math.max(bird.rspeed - 0.5, 0);
    }
    bird.position = bird.position + (bird.rspeed - bird.lspeed);
    $("#bird").css('left', bird.position);
    requestAnimationFrame(birdLoop);
}());

//Move bird
$(document).keydown(function(e){
    switch(e.which){
        case 37://left
            bird.goingLeft= true; 
             //left edge of screen
      if (bird.position < 0) {
        bird.position = 0;
      }
      break;
        case 39://right
            bird.goingRight= true;
             //right edge of screen
      if (bird.position > screenWidth - birdWidth) {
        bird.position = screenWidth - birdWidth;
      }
        default: return;    
    e.preventDefault();//not sure if needed
    }
}).keyup(function(e){
    switch(e.which){
        case 37://left
            bird.goingLeft= false;
            //left edge of screen
       if (bird.position < 0) {
        bird.position = 0;
      }
            break;
        case 39://right
            bird.goingRight= false;
            //right edge of screen
      if (bird.position > screenWidth - birdWidth) {
        bird.position = screenWidth - birdWidth;
      }
        default: return;    
    e.preventDefault();//not sure if needed
    }
});

function spawnPipe()//spawn pipes
{
    setInterval(function()
    {
        astY += 1;
        $("#fullPipe").css("top", astY);              
    }, 10);
}
});

检查： http://jsfiddle.net/u38ratk9/6/

推荐答案

如何产生管道障碍

How to spawn the pipe obstacles

管道以固定间隔或距离发生。您可以检查经过的时间，或者您可以检查现有管道的行驶距离。

The pipes happen at a regular interval or distance. You can either check the time elapsed or you can check the distance traveled by existing pipes.

第二，我需要帮助碰撞检测

Second i need a help with the collision detection

管道有宽度和高度，以及位置。基本上，你的管道是盒子。这也意味着同样的鸟。我相信它被称为边界框。您可以检查鸟的任何边缘是否与盒子的边缘相交。

Pipes have width and height, as well as position. Essentially, your pipes are boxes. This also means the same for the bird. I believe it's called a "bounding box". You can check if any of the edges of the bird if it intersects with the edges of the box.

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