phaser3-rex-plugins-fix-chun/plugins/utils/camera/ZoomAt.js

Plugins of phaser3

import UpdateCameraMetrix from './UpdateCameraMetrix.js';

var ZoomAt = function (camera, zoom, focusLocalX, focusLocalY) {
    if (focusLocalX === undefined) {
        camera.zoom = zoom;
        return;
    }

    var worldXY = camera.getWorldPoint(focusLocalX, focusLocalY);
    camera.zoom = zoom;

    UpdateCameraMetrix(camera);

    var newWorldXY = camera.getWorldPoint(focusLocalX, focusLocalY);
    camera.scrollX -= (newWorldXY.x - worldXY.x);
    camera.scrollY -= (newWorldXY.y - worldXY.y);
}

export default ZoomAt;