Phân Chia (Subdivide)

Tham Chiếu (Reference)

Chế Độ (Mode): Chế Độ Biên Soạn (Edit Mode)
Trình Đơn (Menu): Edge ‣ Subdivide

Subdividing splits selected edges and faces by cutting them in half or more, adding new vertices, and subdividing accordingly the faces involved. It adds resolution to the mesh by divide faces or edges into smaller units.

This process follows a few rules, depending on the settings:

When only one edge of a face is selected (Triangle mode), triangles are subdivided into two triangles, and quads, into three triangles.
When two edges of a face are selected:
- If the face is a triangle, a new edge is created between the two new vertices, subdividing the triangle in a triangle and a quad.
- If the face is a quad, and the edges are neighbors, we have three possible behaviors, depending on the setting of Corner Cut Type (the select menu next to the Subdivide button, in Mesh Tools panel). See below for details.
- If the face is a quad, and the edges are opposite, the quad is just subdivided in two quads by the edge linking the two new vertices.
When three edges of a face are selected:
- If the face is a triangle, this means the whole face is selected and it is then subdivided in four smaller triangles.
- If the face is a quad, first the two opposite edges are subdivided as described above. Then, the "middle" edge is subdivided, affecting its new "sub-quad" as described above for only one edge.
When a face of a Quad is selected, the face is subdivided into four smaller quads.
When a face of an N-gon is selected, the individual edges will be subdivided but the face will stay unsubdivided.

Tùy Chọn (Options)

These options are available in the Tool panel after running the tool:

Số phân đoạn (Number of Cuts)

Specifies the number of cuts per edge to make. By default this is 1, cutting edges in half. A value of 2 will cut it into thirds, and so on.

Độ Mịn Màng (Smoothness)

Displaces subdivisions to maintain approximate curvature. The effect is similar to the way the Bộ điều chỉnh phân hóa bề mặt (Subdivision Surface Modifier) might deform the mesh.

../../../../_images/modeling_meshes_editing_edge_subdivide_smooth-before.png — Mesh before subdividing.

../../../../_images/modeling_meshes_editing_edge_subdivide_smooth-none.png — Phân chia theo mức chi tiết.

../../../../_images/modeling_meshes_editing_edge_subdivide_smooth-after.png — Phân chia theo mức chi tiết.

Chế Độ Tam/Tứ Giác (Quad/Tri Mode)

Forces subdivide to create triangles or quads instead of n-gons (see examples below). This mode doesn't allow the use of Straight Cut on quad corners.

Kiểu Cắt Góc (Corner Cut Type)

This select menu controls the way quads with only two adjacent selected edges are subdivided.

Hình Quạt (Fan): The quad is subdivided in a fan of four triangles, the common vertex being the one opposite to the selected edges.
Các Điểm Đỉnh Nội (Inner Vertices): The selected edges are subdivided, then an edge is created between the two new vertices, creating a small triangle. This edge is also subdivided, and the "inner vertex" thus created is linked by another edge to the one opposite to the original selected edges. All this results in a quad subdivided in a triangle and two quads.
Đường Đi (Path): First an edge is created between the two opposite ends of the selected edges, dividing the quad in two triangles. Then, the same goes for the involved triangle as described above.
Cắt Thẳng (Straight Cut): The selected edges are subdivided, then an edge is created between the two new vertices, creating a small triangle and n-gon.

../../../../_images/modeling_meshes_editing_edge_subdivide_two-edges-quad-fan2.png — Kiểu cắt hình quạt.

../../../../_images/modeling_meshes_editing_edge_subdivide_two-edges-quad-innervert.png — Inner Vertices cut type.

../../../../_images/modeling_meshes_editing_edge_subdivide_two-edges-quad-path.png — Path cut type.

Phân Dạng (Fractal)

Displaces the vertices in random directions after the mesh is subdivided.

../../../../_images/modeling_meshes_editing_edge_subdivide_fractal-before.png — Plane before subdivision.

../../../../_images/modeling_meshes_editing_edge_subdivide_fractal-none.png — Regular subdivision.

../../../../_images/modeling_meshes_editing_edge_subdivide_fractal-after1.png — Same mesh with fractal added.

Theo Hướng Pháp Tuyến (Along Normal)

Causes the vertices to move along their normals, instead of random directions.

../../../../_images/modeling_meshes_editing_edge_subdivide_fractal-along-normal.png — Along normal set to 1.

Random Seed (Mầm ngẫu nhiên)

Changes the random seed of the Fractal noise function, producing a different result for each seed value.

../../../../_images/modeling_meshes_editing_edge_subdivide_fractal-after2.png — Cho phép làm việc với các thang đo khác nhau.

Một Số Ví Dụ (Examples)

Below are several examples illustrating the various possibilities of the Subdivide and Subdivide Multi tools. Note the selection after subdivision.