我正在制作一个基于极坐标的 AI 导航系统。目的是将 actor 移动到一个位置，同时远离其路径上可能存在的障碍。
代码大部分时间都运行良好，但经过测试后，我发现了这一点:当玩家、障碍物和 Actor 都在 X 或 Y 方向或对 Angular 线上完全对齐时， Actor 会卡在障碍物中。当玩家“拥抱”一堵墙时，这一点最为明显，因为 Actor 的运动矢量被墙剪裁，使它们对齐。
单击代码段中的按钮以查看我在说什么。
有什么办法可以避免这种情况吗？
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
let playerX = 100;
let playerY = 200;
let obstacleX = 200;
let obstacleY = 200;
let actorX = 300;
let actorY = 201;
function loop() {
// Wall clipping
if (actorX > 490) {
actorX = 490;
} else if (actorX < 10) {
actorX = 10;
}
if (actorY > 490) {
actorY = 490;
} else if (actorY < 10) {
actorY = 10;
}
// Vector between player and actor
let vectorPlayerX = playerX - actorX;
let vectorPlayerY = playerY - actorY;
// Vector between obstacle and actor
let vectorObstacleX = obstacleX - actorX;
let vectorObstacleY = obstacleY - actorY;
// Where to move, defaults to player's position
const anglePlayer = Math.atan2(vectorPlayerY, vectorPlayerX);
let moveAngle = anglePlayer;
// If near obstacle, adjust course and try to avoid it
if (Math.sqrt(vectorObstacleX * vectorObstacleX + vectorObstacleY * vectorObstacleY) < 50) {
const angleObstacle = Math.atan2(vectorObstacleY, vectorObstacleX);
moveAngle += anglePlayer - angleObstacle;
}
// Move the vector to desired location
actorX += Math.cos(moveAngle);
actorY += Math.sin(moveAngle);
//Drawing
ctx.clearRect(0, 0, 500, 500);
ctx.beginPath();
ctx.fillStyle = "gray";
ctx.arc(actorX, actorY, 10, 0, Math.PI * 2, true);
ctx.fill();
ctx.beginPath();
ctx.fillStyle = "orange";
ctx.arc(obstacleX, obstacleY, 10, 0, Math.PI * 2, true);
ctx.fill();
ctx.beginPath();
ctx.fillStyle = "blue";
ctx.arc(playerX, playerY, 10, 0, Math.PI * 2, true);
ctx.fill();
requestAnimationFrame(loop);
}
requestAnimationFrame(loop);
function nonAligned() {
playerX = 100;
playerY = 200;
obstacleX = 200;
obstacleY = 200;
actorX = 300;
actorY = 201;
}
function alignedY() {
playerX = 100;
playerY = 490;
obstacleX = 200;
obstacleY = 490;
actorX = 300;
actorY = 490;
}
function alignedBoth() {
playerX = 200;
playerY = 200;
obstacleX = 300;
obstacleY = 300;
actorX = 400;
actorY = 400;
}#options {
position: fixed;
top: 5px;
left: 5px;
}<!DOCTYPE html>
<html>
<body>
<canvas id="canvas" width="500" height="500"></canvas>
<div id="options">
<button onclick="nonAligned()">Spawn non-aligned</button>
<button onclick="alignedY()">Spawn Y aligned</button>
<button onclick="alignedBoth()">Spawn diagonally aligned</button>
</div>
</body>
</html>最佳答案
如果玩家和障碍物的 Angular 相同，那么我们继续类(class)，因为变量相互抵消。
moveAngle += anglePlayer - angleObstacle;
如果 anglePlayer 是 117，angleObstacle 是 117，你的 moveAngle 是 117，你得到
117 + 117 -117 = 117 ...
你可能想要这样的东西(伪代码)
moveAngle += anglePlayer + random(90)-45;
或者如果碰到障碍物向左或向右移动
moveAngle += anglePlayer - 90;
if (random(2)==1 moveAngle += 180
关于javascript - AI跟随并避免与障碍物碰撞，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53057291/