设置曲线法向

设置曲线法向 节点控制每条曲线的法向计算方法。

The node doesn’t set the normals directly, those are calculated later as necessary. Combined with the tilt attribute value at each control point, this will define the final normals accessible with the 法向节点.

Internally this node adjusts the values of the normal_mode attribute on each curve.

输入

曲线

标准几何体输入，包含曲线。

选择

是否在每条曲线上更改此数值。

法向

Input for the custom normal attribute (custom_normal) when using Free mode.

属性

模式

评估曲线法向的方法

• 最小扭转:

  The final normals are calculated to have the smallest twist around the curve tangent across the whole curve.

  Z 向上:

  The final normals are calculated so that they are perpendicular to the Z axis and the tangent. If a series of points is vertical, the X axis is used.

  自由:

  使用存储的自定义法向属性（custom_normal）作为最终法向。

  This mode adds a Normal input that can be used to set the value of the custom normal.

  Note

  Custom normals are not rotation invariant, meaning normals must be set after any rotation transformations; i.e. at the end of the node tree or at the bottom of the modifier stack.

输出

曲线

标准的几何体输出。