Files
oboe/rsrc/remove-bg/calc-alpha.fx
Celtic Minstrel e864d9f7eb Replace living statue and crystal soul graphics with versions that don't have a background
- Also included is details on how this was done, in case someone else can improve on it.
- Living statue attack graphic is derived from Exile III.
2014-12-17 11:39:07 -05:00

49 lines
1.0 KiB
HLSL

rback=int(u[1].p{i,j}.r*255);
gback=int(u[1].p{i,j}.g*255);
bback=int(u[1].p{i,j}.b*255);
i==21&&j==8 ? debug(rback) : 1;
i==21&&j==8 ? debug(gback) : 1;
i==21&&j==8 ? debug(bback) : 1;
rmain=int(u[2].p{i,j}.r*255);
gmain=int(u[2].p{i,j}.g*255);
bmain=int(u[2].p{i,j}.b*255);
i==21&&j==8 ? debug(rmain) : 1;
i==21&&j==8 ? debug(gmain) : 1;
i==21&&j==8 ? debug(bmain) : 1;
rdiff=rmain - rback;
gdiff=gmain - gback;
bdiff=bmain - bback;
i==21&&j==8 ? debug(rdiff) : 1;
i==21&&j==8 ? debug(gdiff) : 1;
i==21&&j==8 ? debug(bdiff) : 1;
rgoal=rdiff > 0 ? 255 : 0;
ggoal=gdiff > 0 ? 255 : 0;
bgoal=bdiff > 0 ? 255 : 0;
i==21&&j==8 ? debug(rgoal) : 1;
i==21&&j==8 ? debug(ggoal) : 1;
i==21&&j==8 ? debug(bgoal) : 1;
rgd=rgoal - rback;
ggd=ggoal - gback;
bgd=bgoal - bback;
i==21&&j==8 ? debug(rgd) : 1;
i==21&&j==8 ? debug(ggd) : 1;
i==21&&j==8 ? debug(bgd) : 1;
ro=rgd == 0 ? 0 : rdiff / rgd;
bo=bgd == 0 ? 0 : bdiff / bgd;
go=ggd == 0 ? 0 : gdiff / ggd;
i==21&&j==8 ? debug(ro) : 1;
i==21&&j==8 ? debug(go) : 1;
i==21&&j==8 ? debug(bo) : 1;
max(ro,max(go,bo))