understanding brush dynamics (angle jitter)

[Espermaschine]

I want an arrow that wiggles a little bit, as i drag the brush along.

Im not sure i understand the dynamics curves fully....

So on the left side i have 'Angle' and on the right side 'Randomness', right ?

But when i turn up 'Angle', the arrows wiggle to the right and when i restrict 'Randomness', they wiggle to the left.

What is the logic behind this ? 

   

[Blighty]

Each little square represents 45 degrees (360/8)

First example, angle varies from 315 to 360

Second, angle varies from 0 to 45

Third, angle varies from 135 to 225

If you want arrows as per third example, but upright, then start with an upside down arrow.

[Ofnuts]

"Random"  goes from 0.0 tà 1.00 (or read it as "min" to "max"). The Angle scale goes from min to max too, that is, 0 to 360°. Catch: the middle position is 180°, so the brush is upside-down!  Obviously the angle is the "trignometric" angle, which is counter-clockwise. So, top to bottom:

• The angle is constrained to 340-360°, so the same as -20°-0° CCW, which is 0°-20° clock-wise.
  
• The angle is constrained to 0°-20° CCW, so the same as -20°-0° clock-wise.
  
• The angle is constrained to 170-190° so more or less upside-down.
  

So yes, having the brush wiggle a bit around its "upright" position requires a very contrived curve, and its better to use an upside down brush:

   

   

Changing the angle range from -180° to +180° has already been suggested.

[Espermaschine]

A-ha !

Once you understand that each square represents an eighth its getting easier !
Is there a specific design reason for eight squares, instead of ten (which would be easier to calculate) ?

Fine tuning the wiggle seems very difficult....what if i want it at half a square...when i do that, a bit of the graph is off the diagram.....

   


Also, what does this type of curve mean ?

   

[Blighty]

(12-14-2017, 12:01 PM)Espermaschine Wrote: Also, what does this type of curve mean ?

Left half of curve:
50% of your arrows will be random 0 to 360

Right half:
This only has 360 degrees. Remaining 50% of arrows will be upright.

[Espermaschine]

some aspects of these curves blow my mind a bit... 

EDIT:
a-ha ! i get it - the curve is only applied to half of the diagram