* Strange output from linear_shade (METAPOST)
@ 2014-02-15 0:15 DesdeChaves
0 siblings, 0 replies; only message in thread
From: DesdeChaves @ 2014-02-15 0:15 UTC (permalink / raw)
To: mailing list for ConTeXt users
[-- Attachment #1.1: Type: text/plain, Size: 1198 bytes --]
I need to create some graphics to teach energy. One of the illustrations is
about the sound energy that I represent using linear_shade function. In the
following example the first illustration is represented correctly, but the
second call of the function SoundEnergy implies the loss of gradient. What
am I doing wrong?
Thanks in advance
Jorge
\startMPinclusions
def SoundEnergy =
path pr ; pr := unitsquare xscaled .3cm yscaled 2cm ;
currentpicture:=nullpicture;
for i=0 step 2 until 10:
linear_shade(pr shifted (i*.3cm,0),0,white,black);
linear_shade(pr shifted ((i+1)*.3cm,0),0,black,white);
endfor;
clip currentpicture to
(0,0)--(0,2cm)--(2cm,2cm)--(3cm,1cm)--(2cm,0)--cycle;
draw (0,0)--(0,2cm)--(2cm,2cm)--(3cm,1cm)--(2cm,0)--cycle withcolor
.625red;
addto finalpicture also currentpicture shifted(avanco*3.5cm,0) ;
currentpicture := nullpicture ; avanco := avanco+1 ;
enddef;
\stopMPinclusions
\starttext
\startMPcode
picture finalpicture ; finalpicture := nullpicture ;
numeric avanco ; avanco := 0 ; bboxmargin := 0pt ;
%% first call is OK
SoundEnergy;
%% second call loss the gradient
SoundEnergy;
currentpicture := finalpicture ;
\stopMPcode
\stoptext
[-- Attachment #1.2: Type: text/html, Size: 1832 bytes --]
[-- Attachment #2: Type: text/plain, Size: 485 bytes --]
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2014-02-15 0:15 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-02-15 0:15 Strange output from linear_shade (METAPOST) DesdeChaves
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).