Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.81
Broken: version: 2.80 (sub 51), branch: blender2.7, commit date: 2019-03-25 23:15, hash: rBadfdae3fc2f4
Just click once sometimes work right
Short description of error
[Please fill out a short description of the error here]
This bug happen in both 2.79 and 2.8
Click and drag the hair cut tool mess up the vertices position, especially after subdividing one or 2 segments of the hair. After the hair is messed up, it can't be fixed using rekey command.
Dragging the cut tool on a hair that is not subdivided also cause the problem, but not as severely, the vertices become unevenly positioned.
Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]
Create a hair system on the default cube, set the emission number to 1.
Go to particle edit mode, subdivide one or 2 segments of the hair.
Use the cut tool, click and drag from the tip of the hair.
The hair is now completely messed up.