Polygon Get AABB
Calculate and visualize the Axis-Aligned Bounding Box (AABB) of a polygon as its points are modified dynamically.
800 × 600
class Example extends Phaser.Scene
{
create ()
{
const graphics = this.add.graphics({ lineStyle: { width: 2, color: 0xaa6622 } });
const points = [
new Phaser.Math.Vector2(220, 450),
new Phaser.Math.Vector2(200, 200),
new Phaser.Math.Vector2(400, 300)
];
const polygon = new Phaser.Geom.Polygon(points);
const aabb = Phaser.Geom.Polygon.GetAABB(polygon);
this.input.on('pointermove', pointer =>
{
points[points.length - 1].copy(pointer);
polygon.setTo(points);
Phaser.Geom.Polygon.GetAABB(polygon, aabb);
redraw();
});
this.input.on('pointerdown', pointer =>
{
points.push(points[points.length - 1].clone());
});
redraw();
function redraw ()
{
graphics.clear();
graphics.strokePoints(polygon.points, true);
graphics.lineStyle(2, 0x0000aa);
graphics.strokeRectShape(aabb);
}
}
}
const config = {
scale: { mode: Phaser.Scale.FIT },
width: 800,
height: 600,
type: Phaser.AUTO,
parent: 'game-container',
scene: Example
};
const game = new Phaser.Game(config);