để chuyển đổi hiển thị của nó, chúng ta sẽ đối phó với mạng lưới của các hạt cho ngay bây giờ. tập tin trên đĩa CD có chứa các máy bay trở thành đối tượng cơ thể mềm mại thích hợp và sẽ mang lại cho bạn lên đến điểm này trong thực hiện. Bây giờ, chúng tôi sẽ làm một | Modeling the Face 257 Figure Placing and scaling the sphere Figure Subdividing the model for testing 258 chapter 9 Advanced Character Modeling Using Polygons and Subdivision Surfaces Creating Subdivision Surfaces Before you convert the polygonal cage to subdivision surfaces it is important to delete all construction history. Subdivision modeling can sometimes get slow. Additional history that is unnecessary will make it much worse. Once the polygon cage is completed to the point where you decide to apply the subdivision surfaces you can finally merge the two sides of the face. With both sides selected choose Polygons Combine to combine the two halves into one continuous mesh see Figure . Select the adjacent rows of vertices along the center making absolutely sure that no other vertices are selected except those that run up the exact center of the model see Figure . If some stray vertices creep into the selection set repeat this step until the selection set is correct. Use the Merge Vertices command to seal the center line between the two halves of the model. If some errant vertices merge together during this operation the operation accidentally closes one or more polygons in the model. It is important that this not happen during this step so carefully check the results before proceeding to the next step. Any accidental problem at this stage will cause many more later. In our example we chose Edit Polygons Merge Vertices and set Distance to . By choosing only the vertices that you want to merge and using a relatively low threshold for merging you can help ensure that these common mistakes do not happen. Of course there is always the tried-and-true method of saving often as an insurance policy. Figure Combining the two halves of the head Modeling the Face 259 Figure Selecting the center row of vertices Figure left The merged polygonal wireframe righl the merged model with edge loops Once the two halves are combined it is easy
