“Javascript Player Movement” Respostas de código

Javascript Player Movement

//Javascript game template
//Move player with arrow keys

var canvas = document.createElement("canvas");
canvas.width = 500;
canvas.height = 500;
document.body.appendChild(canvas);
var ctx = canvas.getContext("2d");

var player = {x: canvas.width / 2, y: canvas.height / 2, speed: 10};
var keys = [];

function update() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  
  ctx.beginPath();
  ctx.fillStyle = "red";
  ctx.fillRect(player.x, player.y, 50, 50);
  
  if (keys[37])
    player.x -= player.speed;
  if (keys[38])
    player.y -= player.speed;
  if (keys[39])
    player.x += player.speed;
  if (keys[40])
    player.y += player.speed;
  
  requestAnimationFrame(update);
}
update();

document.onkeydown = function(e) {
  keys[e.keyCode] = true;
}
document.onkeyup = function(e) {
  keys[e.keyCode] = false;
}
unknown5982

Javascript Player Movement

Jet.prototype.checkDirection = function () {
if (this.isUpKey) {
    this.drawY -= this.speed;
    if (this.speed < 5) {
        this.speed += 0.1;
    }
}
if (this.isDownKey) {
    this.drawY += this.speed;
    if (this.speed < 5) {
        this.speed += 0.1;
    }
}
if (!this.isUpKey) {
    if (!this.isDownKey) {
        if (this.speed >= 0) {
            this.drawY -= this.speed;
            this.speed -= 1;
        }
    }
}
if (!this.isDownKey) {
    if (!this.isUpKey) {
        if (this.speed >= 0) {
            this.drawY += this.speed;
            this.speed -= 1;
        }
    }
}
ironibad3k

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