Update tool_brush.gd add min brush size

[DearFox]

Fixes strange brush behavior when drawing from a graphics tablet when the pressure on the stylus is low enough that the actual brush size is less than 1 pixel

We're talking about this strange brush behavior:

Adds a new setting for the brush and eraser tools:

Known "bugs": "Min Size" - not limited by the maximum threshold equal to "Size" It follows from this that if “Min Size” is greater than “Size”, then “Min Size” will have priority.

[don-tnowe]

LGTM! There's also other brush-like tools, I'll edit this after merge.

Do you think it's worth changing this to make width go from minsize at minimum pressure to size at maximum, linearly via lerp(min, max, pressure), instead of all pressure levels below minimum giving the minimum width? This could also "fix" the unconstrained minsize issue.

[DearFox]

LGTM! There's also other brush-like tools, I'll edit this after merge.

Do you think it's worth changing this to make width go from minsize at minimum pressure to size at maximum, linearly via lerp(min, max, pressure), instead of all pressure levels below minimum giving the minimum width? This could also "fix" the unconstrained minsize issue.

Sounds like a good idea. To be honest my implementation is a bit rough

[DearFox]

I was offered a replacement var radius = max((brushsize * 0.5) * (pressure if pen_flags[0] else 1.0),(brushminsize * 0.5)) on var radius = remap(((brushsize * 0.5) * (pressure if pen_flags[0] else 1.0)), 0.0, (brushsize * 0.5), (brushminsize * 0.5), (brushsize * 0.5)) In the paint function

This should solve the unused push in my previous implementation.

[don-tnowe]

Look overengineered, but good. Thank you!

[don-tnowe]

Interesting behaviour: