Creating a semi-transparent icon at runtime

ID:157440
 
Mar 9 2010, 3:25 pm
How would I go about making an icon have less than 255 alpha value at runtime?

I know that rgb(R,G,B,A) CAN work for this with icon Blending, but as far as I know it requires a base color to use.

Is it possible to just take an icon and convert the entire thing to semi-transparency?
Mar 9 2010, 3:26 pm
Subtract rgb(0,0,0,X) from it.
Mar 9 2010, 3:34 pm
In response to Garthor
That doesn't appear to be working.
Here's the code I used:
obj

    var
        tmp
            icon/DisplayIcon
            icon/TransparentIcon
    New()
        ..()
        TransparentIcon=DisplayIcon
        TransparentIcon.Blend(rgb(0,0,0,130),ICON_SUBTRACT)


DisplayIcon is the normal, solid icon for the object.

TransparentIcon is supposed to be the semi-transparent one created in obj/New() and referenced later for whenever the transparency effect is used, but TransparentIcon is still completely solid.
Mar 9 2010, 3:36 pm
In response to Gunbuddy13
Nevermind, I fixed it. Had to mess around with the code a bit:
    New()
        ..()
        var/icon/I=new(DisplayIcon)
        I.Blend(rgb(0,0,0,130),ICON_SUBTRACT)
        TransparentIcon=I
Mar 9 2010, 3:37 pm
Here's a great article on working with the icon processes (or rather a library that makes them easier to use):
http://www.byond.com/members/ DreamMakers?command=view_post&post=51608