Hey guys, I currently have an effect where there are certain objects that move around that have a circle following them which inverts the colours of everything inside it.
Currently, I'm using an object with -9999 depth that follows the main object around and draws the inverted circle like this:
draw_set_blend_mode_ext(bm_inv_dest_colour,bm_inv_src_colour);
draw_set_color(c_white);
draw_set_circle_precision(64);
draw_circle(x,y,256,false);
draw_set_blend_mode(bm_normal);
This works fine, however when I try to use a sprite that is a white circle that is feathered heavily it just ignores the alpha value of the sprite entirely, i.e. if the alpha value of a pixel is >1 it inverts the colours fully rather than partially. My question is whether it's possible to have this inverted colour effect apply at alpha values less than 1? I've tried manually drawing circles with varying alpha values too, and this produces the same effect.
I hope that made sense. Thanks in advance.
Developer
