public function assignUVMapping(channel:Number):void {
            var i:Number;
            var uvChannel:Number;

            i = 0;


            /* If there is no mesh assigned, it finishes */
            if (vectorMeshes.length == 0) return;

            if (channel == 0)
                uvChannel = Surface3D.UV0;
            else  uvChannel = Surface3D.UV1;



            for each (var actualMesh:Mesh3D in vectorMeshes) {
                for each(var s:Surface3D in actualMesh.surfaces) {
                        s.addVertexData( Surface3D.UV1, 2 );
                        for ( var index:int = 0; index < s.indexVector.length; index = index + 3 ){
                            var uv0:int = s.indexVector[index] * s.sizePerVertex + s.offset[uvChannel];
                            var uv1:int = s.indexVector[index + 1] * s.sizePerVertex + s.offset[uvChannel];
                            var uv2:int = s.indexVector[index + 2] * s.sizePerVertex + s.offset[uvChannel];

                            s.vertexVector[uv0] = vectorBoxes[i].face.nP1.x;
                            s.vertexVector[uv0 + 1] = vectorBoxes[i].face.nP1.y;

                            s.vertexVector[uv1] = vectorBoxes[i].face.nP2.x;
                            s.vertexVector[uv1 + 1] = vectorBoxes[i].face.nP2.y;

                            s.vertexVector[uv2] = vectorBoxes[i].face.nP3.x;
                            s.vertexVector[uv2 + 1] = vectorBoxes[i].face.nP3.y;
                                /*
                                s.vertexVector[uv0] = 0.5;
                                s.vertexVector[uv0 + 1] = 0.5;

                                s.vertexVector[uv1] = 0.5;
                                s.vertexVector[uv1 + 1] = 0.5;

                                s.vertexVector[uv2] = 0.5;
                                s.vertexVector[uv2 + 1] = 0.5;
                                */
                            if (debug){
                                trace("u=", s.vertexVector[uv0], " v= ", s.vertexVector[uv0 +1], " u=", s.vertexVector[uv1], " v=", s.vertexVector[uv1+1], " u=", s.vertexVector[uv2], " v=", s.vertexVector[uv2+1]);
                            }
                            i++; //every 3 vertex there is a face
                        }
                    if (debug)  {
                        trace();
                        trace("asignados ");
                        for ( var a:int = 0; a < s.indexVector.length; a += 3 ) {
                            var u0:int = s.indexVector[a] * s.sizePerVertex + s.offset[uvChannel];
                            var u1:int = s.indexVector[a + 1] * s.sizePerVertex + s.offset[uvChannel];
                            var u2:int = s.indexVector[a + 2] * s.sizePerVertex + s.offset[uvChannel];

                            var x:int = s.indexVector[a] * s.sizePerVertex + s.offset[Surface3D.POSITION];
                            trace("x=", s.vertexVector[x], " y=", s.vertexVector[x + 1], " z=", s.vertexVector[x + 2], " u=", s.vertexVector[u0] , " v=", s.vertexVector[u0 + 1]);

                            x = s.indexVector[a + 1] * s.sizePerVertex + s.offset[Surface3D.POSITION];
                            trace("x=", s.vertexVector[x], " y=", s.vertexVector[x + 1], " z=", s.vertexVector[x + 2], " u=", s.vertexVector[u1], " v=", s.vertexVector[u1 + 1]);

                            x = s.indexVector[a + 2] * s.sizePerVertex + s.offset[Surface3D.POSITION];
                            trace("x=", s.vertexVector[x], " y=", s.vertexVector[x + 1], " z=", s.vertexVector[x + 2], " u=", s.vertexVector[u2], " v=", s.vertexVector[u2 + 1]);
                        }
                    }


                }
            }

        }