Did test the patch to see if the numbers in the viewport actually describe what is happening? I'm not sure about the percentages and velocities.

Percentages and Velocities are there, tested. Going to fix the tooltip

Understood it wrong. You mean that 1m/s displayed actually means 1m/s, right?

afaik damping & drag_factor should be PROP_FACTOR and not PROP_PERCENTAGE?

In D4296#97176, @Leon Eckardt (Leon95) wrote:

Understood it wrong. You mean that 1m/s displayed actually means 1m/s, right?

Right, and the same for all the other properties.

Did some Research:

• normal_factor (Speed)
• tangent_factor (Speed)
• factor_random (Speed)
• angular_velocity_factor (Speed - Radians per second) How test it? I don't know how it is meant to work.
• root_radius and tip_radius makes no sense, since there is a radius_scale. But they are in scale if scale_factor = 1. However only cycles shows the hair thickness.
• mass (Mass) is strangely off: A Particle with the mass of "1kg" behaves roughly like a rigid body of 0.043kg (Using a = F/m applying a constant force with Force Forcefield) see Blendfile

(No guaranty that i overlooked one damping factor)

• timestep (Time)
• display_size (Length)

Dont know how to test:
drag_factor (Percentage)
damping (Percentage)
child_parting_min (Angle)
child_parting_max (Angle)
child_radius (Length)
kink_amplitude (Length)
kink_frequency (Length)

switch scenes for the different Properties:

The mass property is not immediately clear what unit it is in. According to old documentation, mass is indeed supposed to be in kg, but not sure if that's still the case.

@Sergey Sharybin (sergey) Do you know what unit the particles mass property is in?

@William Reynish (billreynish), i would expect it's in kilograms. Don't think this ever changed, but not sure if all aspects are preferring physics accuracy over correct units.

So, what to do for the Mass property? Should we just go ahead a label it as kg?