| object -> direct (colors) [message #13411] |
Wed, 04 November 1998 00:00 |
seanosea
Messages: 6
Registered: November 1998
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Junior Member |
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Dia daoibh!
So, I've decided to go with the IDLgrBuffer idea--rendering to the buffer,
then getting the rastered image with IMAGE_DATA keyword and tv'ing the image
to PostScript by set_plot, 'ps'.
I have a new question about colors. IMAGE_DATA returns an array of dimension
(3,xsize,ysize). The "3" is the color issue: if I make a black plot object
and rasterize, all three color slots have the line information. If I make a
red plot object, then (perhaps a little surprisingly) only (1,*,*) and
(2,*,*) show a line, (0,*,*) having just background.
So, I guess I need an i-j loop that considers each (*,i,j), assigning a number
to a new array (i,j) based upon the three color slots? Then tv will have all
the information in a single array, as it appears to like it.
Am I right about this? or do I misunderstand?
Thanks a lot!
Beir bua agus beannacht,
Sean O'Sea
ruminative PostScript :)
I don't know much about the relative utility of Object and Direct Gx--but
Object certainly seems to me more conceptually elegant. (This won't convince
anyone who just wants to get things *done*, of course.) Dividing more complex
things into simpler things along their natural lines is a very fun thing to
ponder, and to implement, and to use. Reminds me of an old saying by Plato:
metaphysics is the job of cutting the beast of reality by the joints.
Sl�n go f�ill!
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