Methods and systems for manipulating and transferring computer-simulated hair

A method for manipulating vertex positions of one or more simulated hair strands while preserving shape details of the one or more simulated hair strands, the method comprising:

• receiving a displacement vector and a region as input;
• identifying one or more first consecutive groups of vertices of a first simulated hair strand within the region;
• for each of the one or more first consecutive group of vertices within the region:
• finding a representative vertex position;
• determining the closest vertex of the consecutive group of vertices to the representative vertex position;
• determining a new positional constraint based on the closest vertex and the displacement vector;
• and
• determining new vertex positions for the first simulated hair strand by executing a constraint enforcement process constrained by one or more constraints, the one or more constraints comprising the new positional constraint for each consecutive group of vertices and one or more shape-preserving constraints.