While shading works with MkIV, with LMTX the following breaks:
\startMPpage
comment("two shades with named colors");
fill fullcircle scaled 5cm
withshademethod "circular"
withshadecolors ((1,0,0),(0,0,1,0))
;
fill fullcircle scaled 5cm shifted (6cm,0)
withshademethod "circular"
withcolor (1,0,0,0) shadedinto "blue"
;
\stopMPpage
The log says:
metafun > log >
metafun > log > error: Unknown relation will be considered false
metafun > log >
metapost > log >
metapost > log > <to be read again>
metapost > log > :
metapost > log > if(EXPR0)>temp_any_u:
metapost > log > temp_any_u:=(EXPR0);fi ENDFOR
metapost > log >
max->begingroup.save.temp_any_u;if.pair(EXPR2):pair.temp_any_u.elseif.string(EXPR2):
string.temp_any_u.fi
;temp_any_u=(EXPR2)for.i=(TEXT3):if.i>temp_any_u:temp_any_u:=i;fi.endfor
metapost > log > .temp_any_u.endgroup
metapost > log >
mfun_max_radius->...er(EXPR2)-xpart.center(EXPR2))++(ypart.center(EXPR2)-ypart.lrcorner(EXPR2)),(xpart.urcorner(EXPR2)-xpart.center(EXPR2))++(ypart.urcorner(EXPR2)-ypart.center(EXPR2)))
metapost > log > endgroup
metapost > log >
withshademethod->...cimal.center(EXPR0)withprescript"sh_center_b="&ddecimal.center(EXPR0)withprescript"sh_radius_a="&decimal0withprescript"sh_radius_b="&decimal.mfun_max_radius((EXPR0))
metapost > log > fi
metapost > log > <to be read again>
metapost > log > withprescript
metapost > log >
withshadecolors->...hprescript"sh_color_a_"&decimal.mfun_shade_step&"="&colordecimals(EXPR0)withprescript"sh_color_b_"&decimal.mfun_shade_step&"="&colordecimals(EXPR1)else:withprescript
metapost > log > "sh_color=in...
metapost > log > <*> comment("two shades with named colors"); fill
fullcircle scaled 5cm withshademethod "circular" withshadecolors
((1,0,0),(0,0,1,0))
metafun > log >
metafun > log > Oh dear. I can't decide if the expression above is
positive, negative, or zero.
So this comparison test won't be 'true'.
metafun > log >
metapost > log > ; fill fullcircle scaled 5cm shifted (6cm,0)
withshademethod "...
metapost > log >
Hans told me not to use the B tag, so I'm asking first in case I've missed
something. Thank you in advance.
Best regards,
Jairo
