RegionAttachment.prototype.setRegion = function (region) {

               if (region == undefined)
                    return;

                this.region = region;
                var uvs = this.uvs;
                if (region.rotate) {
                    uvs[2] = region.u;
                    uvs[3] = region.v2;
                    uvs[4] = region.u;
                    uvs[5] = region.v;
                    uvs[6] = region.u2;
                    uvs[7] = region.v;
                    uvs[0] = region.u2;
                    uvs[1] = region.v2;
                }
                else {
                    uvs[0] = region.u;
                    uvs[1] = region.v2;
                    uvs[2] = region.u;
                    uvs[3] = region.v;
                    uvs[4] = region.u2;
                    uvs[5] = region.v;
                    uvs[6] = region.u2;
                    uvs[7] = region.v2;
                }
            };