code: function(diffX, diffY) {
  			var self = this;
  			var Re = [];
  			for (var row = 0; row < 3; row++) {
  				for (var col = 0; col < 3; col++) {
  					var Point = {
  						X: (self.OffsetX + col * diffX + (col * 2 + 1) * self.R),
  						Y: (self.OffsetY + row * diffY + (row * 2 + 1) * self.R)
  					};
  					Re.push(Point);
  				}
  			}
  			return Re;
  		}
docs: 计算