毛发附着信息

The Hair Attachment Info node provides information about how and where hair curves are attached to a surface mesh. It allows nodes to retrieve stored attachment coordinates, verify whether the attachment is still valid, and access the surface normal at the attachment point. This information is essential for deformation, simulation, and reattachment of hair when the surface mesh changes.

输入

表面几何

The surface geometry to which the hair curves are attached. This is typically the same mesh used during hair generation or interpolation.

表面UV映射

The UV map on the surface mesh used to locate the curve attachment points. It allows retrieving the stored attachment coordinates for each curve.

输出

附着UV

The UV coordinates on the surface where each curve is attached. These are typically stored per curve and used to find the correct attachment location even if the surface topology changes.

附着有效性

A boolean output indicating whether each curve has a valid stored attachment. This can be used to detect invalid or missing attachment data after topology edits or surface replacement.

表面法线

The normal direction of the surface mesh evaluated at the curve's attachment point. This can be used for aligning hair roots, orienting instances, or driving deformation based on surface orientation.