From: Hans Hagen <pragma@wxs.nl>
To: ntg-context@ntg.nl
Subject: Re: Shading to transparent using withshademethod
Date: Thu, 28 Jan 2016 12:29:46 +0100 [thread overview]
Message-ID: <56A9FBAA.4080001@wxs.nl> (raw)
In-Reply-To: <56A9D4AC.6030100@wxs.nl>
On 1/28/2016 9:43 AM, Hans Hagen wrote:
> On 1/27/2016 10:05 PM, Marco Patzer wrote:
>> Hi,
>>
>> some months ago the withshading, withfromshadecolor etc. have
>> apparently been
>> replaced by the more general withshademethod, withshadevector,
>> withshadecolors, etc. methods.
>>
>> I have issues converting the old withshading code to the withshademethod
>> version. The old code had no problems shading to transparent:
>>
>> \definecolor [trans] [a=multiply, t=.5, s=.5]
>> \starttext
>> \startMPcode
>> path p; p:=fullsquare xyscaled (8cm, 8cm);
>> fill p
>> withshading("linear", ulcorner p, llcorner p)
>> withfromshadecolor \MPcolor{black}
>> withtoshadecolor \MPcolor{trans};
>> \stopMPcode
>> \stoptext
>>
>> The new code appears to work in general, but only if no shading to
>> transparent is being used:
>>
>> \definecolor [trans] [a=multiply, t=.5, s=.5]
>> \starttext
>> \startMPcode
>> % works
>> fill fullcircle scaled 10cm withcolor \MPcolor{trans};
>>
>> fill fullsquare xyscaled (15cm, 15cm)
>> withshademethod "linear"
>> withshadevector (0,1)
>> % works
>> withshadecolors (red,\MPcolor{blue})
>> % fails
>> %% withshadecolors (red,\MPcolor{trans})
>> ;
>> \stopMPcode
>> \stoptext
>>
>> How to make transparent shadings work with the new mechanism?
>
> withtransparency (1,.5)
next beta
\definecolor [trans] [a=multiply, t=.5, g=.5]
\startMPpage
fill fullcircle scaled 12cm withcolor \MPcoloronly{trans};
fill fullcircle scaled 10cm withcolor \MPcolor{trans};
fill fullsquare xyscaled (15cm, 15cm)
withshademethod "linear"
withshadevector (0,1)
withshadecolors (red,\MPcoloronly{trans})
withtransparency \MPtransparency{trans}
;
\stopMPpage
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Hans Hagen | PRAGMA ADE
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next prev parent reply other threads:[~2016-01-28 11:29 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-27 21:05 Marco Patzer
2016-01-28 8:43 ` Hans Hagen
2016-01-28 10:45 ` Marco Patzer
2016-01-28 11:33 ` Hans Hagen
2016-01-28 12:53 ` Marco Patzer
2016-01-28 13:45 ` Hans Hagen
2016-01-28 14:34 ` Marco Patzer
2016-01-28 17:26 ` Hans Hagen
2016-01-28 18:09 ` Marco Patzer
2016-01-28 11:29 ` Hans Hagen [this message]
2016-01-28 13:02 ` Marco Patzer
2016-01-28 15:16 ` Hans Hagen
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