Pixel Perfect Pointer Move
Demonstrates how to use pixel-perfect input detection to trigger pointermove events only when the cursor is over non-transparent pixels, including how to set custom alpha thresholds.
800 × 600
class Example extends Phaser.Scene
{
preload ()
{
this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
this.load.image('logo', 'assets/sprites/phaser3-logo.png');
this.load.image('logoAlpha', 'assets/sprites/phaser3-logo-alpha.png');
}
create ()
{
// This sprite is clickable on any pixel that has an alpha value >= 1
const sprite1 = this.add.sprite(400, 200, 'logo').setInteractive({ pixelPerfect: true });
// This sprite is clickable on any pixel that has an alpha value >= 100 (i.e. the left side of the sprite)
const sprite2 = this.add.sprite(400, 400, 'logoAlpha').setInteractive(this.input.makePixelPerfect(100));
const text = this.add.text(10, 10, 'Click either of the sprites', { font: '16px Courier', fill: '#000000' });
this.input.on('pointermove', () =>
{
text.setText('');
});
sprite1.on('pointermove', (pointer, x, y, event) =>
{
text.setText('Moved over Sprite 1');
event.stopPropagation();
});
sprite2.on('pointermove', (pointer, x, y, event) =>
{
text.setText('Moved over Sprite 2');
event.stopPropagation();
});
}
}
const config = {
scale: { mode: Phaser.Scale.FIT },
type: Phaser.AUTO,
parent: 'game-container',
width: 800,
height: 600,
backgroundColor: '#efefef',
scene: Example
};
const game = new Phaser.Game(config);