# 法线编辑器¶

## 法线编辑器主要功能¶

1. Blender内的 datablock数据块（2.74版后可用）被用作于存储法线;

2. 法线编辑和由此产生的材质在 Edit Mode（编辑模式）下显示;

3. 所有更改应用全都立即自动保存;

4. 可在 Viewport视图窗口 通过Shift+Ctrl+R热键可直接旋转顶点法线，就像任何其他Blender里的旋转;

5. 编辑的法线会自动导出

## 启用¶

Activate 按钮打开顶点法线编辑模式。

## Rotate¶

Rotate 按钮提供了更简便的方法来操纵法线。旋转在屏幕空间执行。然而，正如任何在Blender的其他旋转，您可在旋转过程中隔离所需的轴 (通过键入 X、 Y 或 Z)。

## Scale¶

This function can be used to change the scale of the normals and is available both from the Tool panel and by pressing the Shift + Ctrl + S hot keys. The length of a normal can be set with numeric keys, while X, Y and Z keys are used to set the coordinate axis along which the normal is scaled.

Keep in mind that the visible length of any normal never changes and is always defined by the Size parameter.

## 绝对和偏移模式¶

### 偏置模式¶

XYZ 字段可用于设置向量的相应分量，而 SubAdd 按钮定义是否该矢量应该从法线矢量中减去或加至它。

## 分割法线¶

Split Normals（分割法线）模式允许分别编辑每一面的顶点法线。Index索引栏允许您在分开的法线间切换。

## 平均¶

Average 按钮平均值其中被修改的顶点法线的方向。

## 恢复¶

Restore（还原）按钮将还原所选顶点法线的原始方向。

## 3D Cursor, Axis and Face¶

The 3D Cursor button directs the normals of the selected vertices away from the 3D cursor or toward it (if the Towards parameter in the Vertex Normal Cursor panel is enabled). The Axis button directs the normals of the vertices along a coordinate axis (the axis can be selected in the same Vertex Normal Cursor panel). The Face button directs the normals of the selected face parallel to the normal of this face.

In order to use the 3D Cursor function, select the desired vertices and place the 3D cursor in the desired position. Then click the 3D Cursor button so all the selected vertices will turn their direction away from the cursor, as if they were shot from one point. Then you may check the Towards option in the Vertex Normal Cursor panel, which will make the normals to turn in the direction of the cursor.

The Axis function is very easy to use: just select the vertices and press the button, so the function will direct their normals along the coordinate axis set in the Vertex Normal Cursor panel (Z axis is selected by default) or away from it, if you disable the Towards parameter on the same panel.

In order to direct the normals parallel to the face normal, just select the desired face (or several faces) and click the Face button. The normals of the vertices which form the face will be directed parallel to the face normal. This function works only with one selected face at a time.

The 3D Cursor, Axis and Face operators also possess the Factor parameter which is used to mix the initial position of the normals with the resulting position. The default value of this parameter is 1.0 (the resulting position is used).

## 从网格复制¶

Matched Vertices模式只许在两个物体拥有相同的座标系时复制;其余的顶点将被忽略。Nearest Vertices模式是从来源物体顶点最靠近处复制法线。