我正在尝试缩放一个 sprite，它是 javascript 中的子弹，但它不会改变，我是不是把它放在了错误的函数中？它目前在创建函数中，子弹需要大约 10x10 像素，但现在它很大，占据了大约一半的播放屏幕。
我正在使用 Phaser.io 作为框架，并且我尝试了他们的一些缩放方法，但它似乎不起作用。
var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', { preload: preload, create: create, update: update, render: render });
function preload() {
game.load.image('bullet', 'Pokeball.png');
game.load.image('ship', 'assets/sprites/shmup-ship.png');
}
var sprite;
var weapon;
var cursors;
var fireButton;
function create() {
game.stage.backgroundColor = ('#424242');
// Creates 1 single bullet, using the 'bullet' graphic
weapon = game.add.weapon(1, 'bullet');
// The bullet will be automatically killed when it leaves the world bounds
weapon.bulletKillType = Phaser.Weapon.KILL_WORLD_BOUNDS;
// Because our bullet is drawn facing up, we need to offset its rotation:
weapon.bulletAngleOffset = 90;
// The speed at which the bullet is fired
weapon.bulletSpeed = 400;
sprite = this.add.sprite(320, 500, 'ship');
game.physics.arcade.enable(sprite);
// Tell the Weapon to track the 'player' Sprite, offset by 14px horizontally, 0 vertically
weapon.trackSprite(sprite, 14, 0);
cursors = this.input.keyboard.createCursorKeys();
fireButton = this.input.keyboard.addKey(Phaser.KeyCode.SPACEBAR);
weapon.scale.x = 10;
weapon.scale.y = 10;
// You can also scale sprites like this:
// sprite.scale.x = value;
// sprite.scale.y = value;
}
function update() {
sprite.body.velocity.x = 0;
if (cursors.left.isDown)
{
sprite.body.velocity.x = -200;
}
else if (cursors.right.isDown)
{
sprite.body.velocity.x = 200;
}
if (fireButton.isDown)
{
weapon.fire();
}
}
function render() {
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Simple Canvas Game</title>
<style>
html {
background: black
}
canvas {
margin: auto;
}
</style>
</head>
<body>
<script src="phaser.js"></script>
<script src="game.js"></script>
</body>
</html>最佳答案
Weapon 是一个相位器插件，可帮助您创建子弹。您可以通过这种方式缩放项目符号:
weapon.bullets.setAll('scale.x', 0.5);
weapon.bullets.setAll('scale.y', 0.5);
Phaser 论坛中也发布了类似的问题: http://www.html5gamedevs.com/topic/30010-euhm-scaling-a-weaponbullets/
关于javascript - 如何在 Javascript 中缩放 Sprite ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45618942/