vector graphics

[Viktoras Didziulis]

Thanks Jan! 
 
-------Original Message------- 
 
From: Jan Schenkel 
Date: 07/04/06 21:38:31 
To: How to use Revolution 
Subject: Re: vector graphics 
 
--- Viktoras Didziulis <viktoras at ekoinf.net> wrote: 
> 
> Dear all, 
> 
> Are there any good references/tutorials on how to 
> handle elementary vector 
> graphics in Transcript. What I am trying to do is: 
> 1) draw a polyline, polygon or point with unique 
> name/ID from coordinates 
> stored in tab delimited file as pairs of xy 
> coordinates, each vector object 
> starting in new line and assign a color to line, 
> point or polygon (both line 
> and fill); 
> 2) change scale - zoom-in or zoom-out, 
> 3)save the final vector image in a raster format 
> (bmp, gif or png) with 
> predetermined resolution, lets say 1024x768 pixels. 
> 
> What's the simpliest way of doing this ? 
> 
> Best wishes 
> Viktoras 
> 
 
Hi Viktoras, 
 
Take a look at the 'graphic' control - style 'polygon' 
and its 'points' property. It's a return-delimited 
list of points that you can get and set from a 
handler. 
So depending on the file contents, it could be as easy 
as: 
-- 
put URL("file:" & tFilePath) into tPoints 
set the points of graphic "foobar" to tPoints 
-- 
 
Setting the points will update the graphic's 
rectangle, and vice versa: change the rectangle, and 
Revolution will scale it for you - naturally, using 
multiples of the original dimensions will work best 
;-) 
 
As for rastering, you can use the 'import snapshot' or 
'export snapshot' commands, but I'mnot sure how you 
can set the resolution. Perhaps some of the 
media-oriented people can chime in? 
 
Hope this helped, 
 
Jan Schenkel. 
 
Quartam Reports for Revolution 
<http://www.quartam.com> 
 
===== 
"As we grow older, we grow both wiser and more foolish at the same time."
(La Rochefoucauld) 
 
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