Brush Design - Speed

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riddlez
 
Posts: 6
Joined: 06 Dec 2017, 23:15

Brush Design - Speed

Postby riddlez » 09 Dec 2017, 20:09

I figured this question should be a new topic as it is specific to the speed variable.

I'm in the middle of Tutorial 2 on youtube, and the speed function and it's scales see weird.

What are the units of the speed? px/s? If it is an absolute scale, multiplying it by 150 makes some sense. Or is it another normalized value, such as some maximum speed? If so, how is that maximum speed determined?

This came about because, in order for it to be appropriately inverted, multiplying the original value by 150 must result in a number that is less than 1 (input A in the Sub function) in order for you to still get a positive number. That being the case, the range must be huge.

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u2bleank
 
Posts: 993
Joined: 11 Jun 2012, 10:41

Re: Brush Design - Speed

Postby u2bleank » 11 Dec 2017, 09:49

Another excellent question :D

The speed is in pixel / second and then is normalized to [0,1] from the range [0, 800 px/s]


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