Label Opacity Fix

[Taz1004]

I've been searching for the label opacity issue only to find posts saying that it's a bug. So I did some trial and error and below is my workaround for changing label opacity.

 

Opacity value in Labels.lua doesn't seem to do anything. You have to play with color_blending_k.

 

Setting this value to 1 will be completely opaque, setting it to 0 will be completely transparent.

 

However, color blending blends with the ColorUnknown defined at the bottom of Labels.lua. So if you set the color_blending_k to 0, your label will be transparent but the ColorUnknown will show up. Problem is that this ColorUnknown only had 3 digits for RGB value and no 4th digit for alpha. So I simply added the 4th value to read:

 

ColorUnknown = {50, 50, 50, 0} -- will be blend at distance with coalition color

 

And this seems to have worked. ColorUnknown is transparent and setting the color_blending_k between 0 and 1 seems to work as transparency.

 

Below is my GroundFormat example. It is set it to be 75% opacity at 8,000m. 30% opacity at 4,000m. And disappear at 3,200m.

 

GroundFormat = {

--[distance] = {format , alignment, color_blending_k, opacity, shift_in_pixels_x, shift_in_pixels_y}

[3200] = {ground_symbol_far ,"CenterCenter" ,0 , 0.1 , 0 , -1},

[4000] = {ground_symbol_far ,"CenterCenter" ,0.3 , 0.1 , 0 , -1},

[8000] = {ground_symbol_far ,"CenterCenter" ,0.75 , 0.2 , 0 , -1},

[16000] = {ground_symbol_far ,"CenterCenter" ,0.75 , 0.3 , 0 , -1},

[24000] = dot_symbol(0.5, 0.1),

}