flash on 2011-1-24

/**
 * Copyright fakestar0826 ( http://wonderfl.net/user/fakestar0826 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/7iPD
 */

package {
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        private static const TEXTURE_W:uint = 320;
        private static const TEXTURE_H:uint = 480;
        private static const SEGMENT_W:uint = 8;
        private static const SEGMENT_H:uint = 12;
        
        private var _vertices:Vector.<Number>;
        private var _indices:Vector.<int>;
        private var _uvtData:Vector.<Number>;
        
        public function FlashTest() {
            // write as3 code here..
            var numVertices:uint = (SEGMENT_W + 1) * (SEGMENT_H + 1) * 2;
            var i:uint, x:uint, y:uint;
            
            _vertices = new Vector.<Number>(numVertices, true);
            _indices = new Vector.<int>(SEGMENT_W * (6 * SEGMENT_H), true);
            _uvtData = new Vector.<Number>(numVertices, true);
            var w:Number = TEXTURE_W / SEGMENT_W;
            var h:Number = TEXTURE_H / SEGMENT_H;
            
            for(x = 0; x <= SEGMENT_W;++x)
            {
                for(y = 0;y <= SEGMENT_H;++y)
                {
                    i = (y * (SEGMENT_W + 1) + x) * 2;
                    _vertices[i] = w * x;
                    _vertices[i + 1] = h * y;
                    _uvtData[i] = _vertices[i] / TEXTURE_W;
                    _uvtData[i + 1] = _vertices[i + 1];
                }

            }
            
            for(x = 0; x < SEGMENT_W;++x)
            {
                i = (x * (6 * SEGMENT_H));
                for(y = 0;y < SEGMENT_H;++y)
                {
                    _indices[i + y * 6 + 0] = (y + 0) * (SEGMENT_W + 1) + (x + 0);
                    _indices[i + y * 6 + 1] = (y + 0) * (SEGMENT_W + 1) + (x + 1);
                    _indices[i + y * 6 + 2] = (y + 1) * (SEGMENT_W + 1) + (x + 0);
                    _indices[i + y * 6 + 3] = (y + 0) * (SEGMENT_W + 1) + (x + 1);
                    _indices[i + y * 6 + 4] = (y + 1) * (SEGMENT_W + 1) + (x + 0);
                    _indices[i + y * 6 + 5] = (y + 1) * (SEGMENT_W + 1) + (x + 1);
                }

            }
            
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
        }
        
        private function onEnterFrame(e:Event):void
        {
            graphics.clear();
            graphics.beginFill(0xFF0000);
            graphics.drawTriangles(_vertices, _indices, _uvtData);
            graphics.endFill();
        }

    }
}