Skin.prototype.UVMap = function(mesh, face, x, y, w, h, rotateBy) {  
  if (!rotateBy) rotateBy = 0;  
  var geo = (mesh.geometry) ? mesh.geometry: mesh;  
  var uvs1, uvs2, vCount;  
  if(geo.faceVertexUvs[0][0].length == 3){  
	  //newer versions of Three use triangles for faces  
	  uvs1 = geo.faceVertexUvs[0][face*2];  
	  uvs2 = geo.faceVertexUvs[0][face*2+1];  
	  vCount = 3;  
  }  
  else if(geo.faceVertexUvs[0][0].length >=4) {  
	  //compatibility for older versions of Three  
	  uvs1 = geo.faceVertexUvs[0][face];  
	  uvs2 = [{x:0,y:0},{x:0,y:0},{x:0,y:0},{x:0,y:0}];  
	  vCount = 4;  
  }  
  else{  
	  //might want to handle exception  
  }  
  var tileU = x;  
  var tileV = y;  
  var tileUvWidth = 1/64;  
  var tileUvHeight = 1/32;  
  var xtopleft, ytopleft, xbotleft, ybotleft, xbotright, ybotright, xtopright, ytopright;  
  xtopleft = (tileU * tileUvWidth)  
  ytopleft = 1 - (tileV * tileUvHeight)  
  xbotleft = (tileU * tileUvWidth)  
  ybotleft = 1 - (tileV * tileUvHeight + h * tileUvHeight)  
  xbotright = (tileU * tileUvWidth + w * tileUvWidth)  
  ybotright = 1 - (tileV * tileUvHeight + h * tileUvHeight)  
  xtopright = (tileU * tileUvWidth + w * tileUvWidth)  
  ytopright = 1 - (tileV * tileUvHeight)  
  uvs1[ (0 + rotateBy) % vCount ].x = xtopleft  
  uvs1[ (0 + rotateBy) % vCount ].y = ytopleft  
  uvs1[ (1 + rotateBy) % vCount ].x = uvs2[ (0 + rotateBy) % vCount ].x = xbotleft  
  uvs1[ (1 + rotateBy) % vCount ].y = uvs2[ (0 + rotateBy) % vCount ].y = ybotleft  
  uvs2[ (1 + rotateBy) % vCount ].x = xbotright  
  uvs2[ (1 + rotateBy) % vCount ].y = ybotright  
  uvs1[ (2 + rotateBy) % vCount ].x = uvs2[ (2 + rotateBy) % vCount ].x = xtopright  
  uvs1[ (2 + rotateBy) % vCount ].y = uvs2[ (2 + rotateBy) % vCount ].y = ytopright  
  if(vCount >=4){  
	  uvs1[ (2 + rotateBy) % vCount ].x = xbotright  
	  uvs1[ (2 + rotateBy) % vCount ].y = ybotright  
	  uvs1[ (3 + rotateBy) % vCount ].x = xtopright  
	  uvs1[ (3 + rotateBy) % vCount ].y = ytopright  
  }  
  geo.uvsNeedUpdate = true;  
}