Hi,
there are some problems in combination with the 'withshade' operator in
mlib.
this must be patched in mp-mlib.mp (':=' instead of '='; too much lua ;)
vardef define_circular_shade (expr a, b, ra, rb, ca, cb) =
_defined_cs_ := _defined_cs_ + 1 ;
_defined_cs_pre_ [_defined_cs_] := "cs" ;
_defined_cs_post_[_defined_cs_] := "0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " "
& decimal ra & " " &
colordecimals cb & " " & ddecimal (b shifted shadeoffset) & " "
& decimal rb ;
_defined_cs_
enddef ;
vardef define_linear_shade (expr a, b, ca, cb) =
_defined_cs_ := _defined_cs_ + 1 ;
_defined_cs_pre_ [_defined_cs_] := "ls" ;
_defined_cs_post_[_defined_cs_] := "0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " "
colordecimals cb & " " & ddecimal (b shifted shadeoffset) ;
_defined_cs_
enddef ;
i still get an error after this patch, because '_defined_cs_' is not
increased somehow (donno why, not my day; cleared mem, remade formats).
_defined_cs_pre_0 is of course undefined.
[..]
report >> mp terminal: ! Missing argument to withshade.
<to be read again>
define_linear_shade
<*> ...,1cm); fill p withshade define_linear_shade
(p,1,red,blue); ;
>> unknown string _defined_cs_pre_0
! Improper type.
<to be read again>
withpostscript
withshade->...fined_cs_pre_[(EXPR0)]withpostscript
._defined_cs_post_[(EXPR0)]
<to be read again>
define_linear_shade
<*> ...,1cm); fill p withshade define_linear_shade
(p,1,red,blue); ;
>> _defined_cs_post_0define_linear_shade
! Improper type.
<to be read again>
(
<*> ...1cm); fill p withshade define_linear_shade(
p,1,red,blue); ;
! Extra tokens will be flushed.
<to be read again>
(
<*> ...1cm); fill p withshade define_linear_shade(
p,1,red,blue); ;
report >> mp error: unknown, no error, terminal or log messages
[..]
here the test code:
\setupcolors[state=start]
\starttext
\null
\startMPcode
path p;
p:= unitsquare xyscaled(10cm,1cm);
fill p withshade
define_linear_shade(p,1,red,blue);
\stopMPcode
\stoptext
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