Method constructor

packages/melonjs/src/lighting/light2d.ts:113–158

* Create a 2D point light. * * A `Light2d` is a first-class world Renderable: add it to a container * with `app.world.addChild(light)` (or any sub-container, including a * `Sprite`, so the light follows the parent via its transform). On * activation, the light auto-registers with the activ

(
		x: number,
		y: number,
		radiusX: number,
		radiusY: number = radiusX,
		color: Color | string = "#FFF",
		intensity: number = 0.7,
	)

	 * @param [intensity=0.7] - The peak alpha of the radial gradient at the light's center (0–1).
	 */
	constructor(
		x: number,
		y: number,
		radiusX: number,
		radiusY: number = radiusX,
		color: Color | string = "#FFF",
		intensity: number = 0.7,
	) {
		// pos is the light's CENTER (matches `Ellipse(x, y, w, h)` and
		// `Sprite` conventions); the centered anchor below makes Renderable's
		// transform stack scale/rotate around that center too.
		super(x, y, radiusX * 2, radiusY * 2);

		this.color = colorPool.get();
		if (color instanceof Color) {
			this.color.copy(color);
		} else {
			this.color.parseCSS(color);
		}

		this.radiusX = radiusX;
		this.radiusY = radiusY;
		this.intensity = intensity;

		/**
		 * the default blend mode to be applied when rendering this light
		 * @see CanvasRenderer#setBlendMode
		 * @see WebGLRenderer#setBlendMode
		 */
		this.blendMode = "lighter";

		// initial shape — `getVisibleArea()` rewrites this each frame from
		// transform-aware bounds.
		this.visibleArea = ellipsePool.get(
			this.pos.x,
			this.pos.y,
			this.width,
			this.height,
		);

		// centered anchor — transforms (scale, rotate) pivot around `pos`.
		this.anchorPoint.set(0.5, 0.5);

		this.illuminationOnly = false;
		this.lightHeight = Math.max(radiusX, radiusY) * 0.075;
	}

	/**
	 * the horizontal coordinate of this light's center.