flash – 在OpenFL中创建多个sprite实例？

如何使用OpenFL / Haxe实现这一目标？

例如：

下面的图块实现是浪费的,因为在创建时为每个图块呈现SVG图像.

// Each of the following tile sprites contain copies of the same image.
var xyz1:Tile = new Tile("xyz");
var xyz2:Tile = new Tile("xyz");
var xyz3:Tile = new Tile("xyz");

平铺实施

package;

import flash.display.Shape;
import format.SVG;
import openfl.Assets;

class Tile extends Shape {

    // Static cache of SVG data to avoid loading asset each time.
    private static var tileImageMap:Map<String,SVG> = new Map<String,SVG>();

    private static function lookupSVG(tile:String):SVG {
        var svg:SVG = tileImageMap.get(tile);
        if (svg == null) {
            svg = new SVG(Assets.getText("img/" + tile + ".svg"));
            tileImageMap.set(tile,svg);
        }
        return svg;
    }

    public var tile(get,set):String;

    private var _tile:String;

    private function get_tile():String {
        return _tile;
    }

    private function set_tile(value:String):String {
        if (value != _tile) {
            _tile = value;

            // Render tile SVG to tile sprite.
            // How can this be cached and reused by multiple tile instances?
            graphics.clear();
            lookupSVG(value).render(graphics,56,56);
        }
        return _tile;
    }

    public function new(tile:String) {
        super();

        cacheAsBitmap = true;

        this.tile = tile;
    }

}