检测两个fill.Rect函数之间的碰撞-PHP中文网问答

我有一个游戏，其中一个玩家由箭头键控制，另一个玩家由WSAD键控制。我在一个600x600的画布中设置了地图，并希望在游戏中的两个fill.Rect玩家之间添加碰撞，当两个玩家在一定半径范围内时，要么结束程序，要么显示文本，如“游戏结束”

以下是我的js、Html和Css代码（要查看代码片段，您必须转到“全屏”）：

//Canvas
mycan.style.display = "block";
mycan.height = 600;
mycan.width = 600;
//make players
let player = {x:511, y: 541, w:29, h:29};
let player2 = {x:60, y:31, w:30, h:29};


//Context
const ctx = mycan.getContext("2d");


//Start-position
ctx.fillRect(player.x, player.y, player.w, player.h);
ctx.fillRect(player2.x, player2.y, player2.w, player2.h);
//No-smooth-movement
window.onkeydown = move = (e) => {
    let key = e.keyCode;
  //player1(red)
    if     (key === 68 && player2.x <= mycan.width-30) {player2.x += 30;} //right
    else if(key === 65 && player2.x >= 10) {player2.x -= 30;} //left
    else if(key === 83 && player2.y <= mycan.height-30) {player2.y += 30;} //down
    else if(key === 87 && player2.y >= 10) {player2.y -= 30;} //up  
  
  
  //player2(blue)
    if     (key === 39 && player.x <= mycan.width-25) {player.x += 30;} //right
    else if(key === 37 && player.x >= 10) {player.x -= 30;} //left
    else if(key === 40 && player.y <= mycan.height-25) {player.y += 30;} //down
    else if(key === 38 && player.y >= 10) {player.y -= 30;} //up
}

const draw = ()=>{
//player draw, and player colors
  ctx.clearRect(0,0, mycan.width, mycan.height);
  ctx.fillRect(player.x, player.y, player.w, player.h);
  ctx.fillStyle = "blue";
  ctx.fillRect(player2.x,player2.y, player2.w, player2.h);
  ctx.fillStyle = 'red';
  
  
  
};

setInterval(()=>{
  draw();
},1000/60);

//collision
//thsi is where i want to add collision

html, body {
  margin:20;
  padding: 20;
}
canvas {
  display: block;
}

#mycan {
  background-size: 30px 30px;
  background-image:
    linear-gradient(to right, black 1px, transparent 1px),
    linear-gradient(to bottom, black 1px, green 1px);

}

<!DOCTYPE html>
<html lang="en">
  <head>
    <link rel="stylesheet" type="text/css" href="style.css">
    <meta charset="utf-8" />
<canvas id = mycan > </canvas>
    
    <font color = 'blue'> <h1>Player1 = blue</h1></font color>
    <font color = 'red'> <h1>Player2 = red</h1></font color>

  </head>
  <body>
    <main>
    </main>
    <script src="script.js"></script>

  </body>
</html>

全部回复(1)

P粉7528128532023-09-16 10:18:25 1楼

I've wrote you a function that checks the collision.

We do that by first checking if the left edge of rect1 is further to the right than the right edge of rect2. We also check if the right edge of rect1 is further to the left than the left edge of rect2.

Same thing for bottom edge.

if all of those are false, the rectangles must be overlapping.

const checkCollision = (rect1, rect2) => {
  return rect1.x < rect2.x + rect2.w &&rect1.x + rect1.w > rect2.x &&rect1.y < rect2.y + rect2.h &&rect1.y + rect1.h > rect2.y 
}

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