Auto Pillar Size and Spacing - #5141

Variable Pillar Sizes for SupportMaterial.pm
From what I understand from the pillar supports in this supportmaterial.pm, is that they produce the same width pillars for different sized objects. In response to issue slic3r#3485, rather then making 'pillar size and spacing' a changeable variable in the UI it could be interesting to have these variables changed automatically depending on the size of the object.  The altercations I have made to this code allows for a pillar size and spaces which change depending on the width of the object. 

It does this by using the square root of the x width and then using that number to create a suitable pillar width for the pillars. I am new to perl and not a mathematician so this may not be the best way for going about doing this variable pillar widths. Either way, I hope this might come in handy in some way. 

Notes: I had to change the Margin Step to MARGIN/1 to get the pillars built in squares at the edge. This also did not work on a cube smaller then 15mm as it removed the outer walls, but did work on another test model smaller then 20mm so I don't know what that error is but believe it is due to "my $x_max_pillar = $x_max_squared/1000;".

Variable Pillar Sizes for SupportMaterial.pm
From what I understand from the pillar supports in this supportmaterial.pm, is that they produce the same width pillars for different sized objects. In response to issue slic3r#3485, rather then making 'pillar size and spacing' a changeable variable in the UI it could be interesting to have these variables changed automatically depending on the size of the object.  The altercations I have made to this code allows for a pillar size and spaces which change depending on the width of the object. 

It does this by using the square root of the x width and then using that number to create a suitable pillar width for the pillars. I am new to perl and not a mathematician so this may not be the best way for going about doing this variable pillar widths. Either way, I hope this might come in handy in some way. 

Notes: I had to change the Margin Step to MARGIN/1 to get the pillars built in squares at the edge. Tested in application and worked but I have not printed it yet. This also did not work on a cube smaller then 15mm as it removed the outer walls, but did work on another test model smaller then 15mm so I don't know what that error is but believe it is due to "my $x_max_pillar = $x_max_squared/1000;".