[Feature Request] Add custom variables

[P-i-r-o]

Hi

I wrote the script to temperature calibration tower that adds M104 command in the right places. To made it parametric I needed some variables, where i can store valiues. Unfortunately there's no free variables so I had to use some of already present and that not change gcode.
In my case i used filament cost, density and soluble to make it works.

Here it is:

{if false} ;temp tower mode: set filament to soluble to enable, filament cost is height change for temp change, filament density is temp decrement {endif}
{if (filament_soluble[0] == true) && (layer_z >= filament_cost[0] * ((layer_z + z_offset - layer_z % filament_cost[0]) / filament_cost[0])) && (layer_z < (filament_cost[0] * ((layer_z + z_offset - layer_z % filament_cost[0]) / filament_cost[0]) + layer_height)) }M104 S{temperature[0] - (filament_density[0] * ((layer_z - layer_z % filament_cost[0]) / filament_cost[0])) } {endif}

It would be very helpful to be able to define and use variables inside custom gcode section. This code could be more clear and editable then and also will allow others to create other macros.
Enough for now could be some new hardcoded variables. Such like I have already used, but not used nowhere else.
Is this a new feature request?
Yes

[lukasmatena]

Support for local and global variables was implemented in 2.6.0-alpha6. Closing.