Sergiy Radyakin wrote:
I am writing a graphing procedure (directly with Stata's undocumented
gdi commands). There is a pseudo-transparency effect as can be seen
below:
sysuse auto, clear
generate ww = weight * 2.85
twoway area price ww l, sort fi(100 100)
twoway area price ww l, sort fi(30 30)
Is it possible to achieve "true-transparency" (where the first "blue"
graph could be seen through the second "pink")?
In technical terms: does gdi shadelevel set color or the method of
drawing (SET,OR,AND,XOR)? I.e. is it equivalent to
gdi shadergb = `i' * `R' `i' * `G' `i' * `B'
??
--------------------------------------------------------------------------------
Adrian Mander has written something that might help you get closer to what
you're looking for. He mentions it in this post:
http://www.stata.com/statalist/archive/2006-10/msg00018.html
Joseph Coveney
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
