[away3d] elevation class too slow to use

[andrew barry]

My code works as it displays a 1000X1000 terrain with heighmap.

IT is way to slow to use as when i move camera . It is very slow.

How can I speed this up or I am not supposed to use 1000X1000  size
height map and terrain?



[Embed(source="grass2.jpg")]    private var Terrain:Class;
                [Embed(source="redmap.jpg")]    private var HeightMap:Class;


                private var extrude:SkinExtrude;
        ...
                        var terrainMaterial:BitmapMaterial =
                                new BitmapMaterial(Cast.bitmap(Terrain));

                        var elevation:Elevation = new Elevation();
                        var vertices:Array= elevation.generate(
                                Cast.bitmap(HeightMap),"r",16,16,1,1,0.25);
                        extrude = new SkinExtrude(vertices,
                                {
        
coverall:true,material:terrainMaterial,recenter:true,bothsides:true

                                }
                                );

                                extrude.rotationX = 90;
                                extrude.x=extrude.y=extrude.z=0;
                                view.scene.addChild(extrude);