Wireframe Plane 2D

var plane:Shape = Shape(addChild(new Shape()));
plane.x = plane.y = 50;

var verts:Vector.<Number> = new Vector.<Number>();
var indices:Vector.<int> = new Vector.<int>();
var rows:int = 20;
var size:Number = rows + 1;
var vertNum:Number = size * size;
var polySize:Number = 20;
var vIndex:int = 0;
for (var i:Number = 0; i<vertNum; i++){
	verts[vIndex++] = i % size * polySize;
	verts[vIndex++] = int(i / size) * polySize;
	if (i % size != rows){
		  indices.push(i, i+1, i+size, i+size, i+size+1, i+1);
	}
}

// render and show that the verts can be changed around
addEventListener(Event.ENTER_FRAME, onLoop);
function onLoop(evt:Event):void {
	// shake the verts
	for (var i:int = 0; i<verts.length; i++){
		verts[i] += Math.random() - 0.5;
	}
	with(plane.graphics){
		clear();
		lineStyle(0,0);
		drawTriangles(verts, indices);
	}
}

This snippet shows a simple way to draw a 2D wireframe plane using drawTriangles(). To demonstrate the flexibility of the plane… the vertices are randomly shaken on enterframe.