have hair interact with a surface, you must set the hair to collide
with the surface. A collision object can be a NURBS or polygonal
surface. In the next part of the lesson you set the curtain to collide
with the sphere and then play the simulation.
To enhance the curtain for collisions
- To select the hair system, drag around
the hair curves and then select
Hair > Convert Selection > To
- In the hairSystemShape1 tab of the Attribute
Editor, set the hair system attributes as follows:
- In the Clump and Hair Shape section,
set Clump Width to 0.
- In the Dynamics section,
set Stiffness to 0.
To make the hair collide with the sphere
- Select the hair system and the sphere
(drag around the hair curves and sphere).
Hair > Make Collide.
- Play the simulation.
Now the sphere collides
with the curtain, pushing the strands of hair aside as it passes