The lower level rc__ogl used by gsinit returns 1 if new rc and 0 if not.
gsinit only does init stuff if rc result is 1. This result is passed back to
the caller so you can use that to do your new rc setup (that is, no need for
FIRST). Chris may have further comments.
----- Original Message -----
From: "Oleg Kobchenko" <[EMAIL PROTECTED]>
To: "Beta forum" <[email protected]>
Sent: Sunday, May 21, 2006 6:25 PM
Subject: [Jbeta] Importance of having setup in OpenGL
I had a first look at the OpenGL demo.
Looks and feels terrific!
On simple models fps are 60, which is good.
Complex models naturally draw slower.
Here's a small experiment to show
that having setup and moving initialization
there from the main loop, improves performance:
fps 60 vs 9 (see fragment below).
Setup mechanism can be done in the utility code,
and user code would optionally implement a "setup"
verb, which for exampled could be called from gsinit.
or at least gsinit could return a boolean to indicate,
that it's a first time after context has been created.
Here, due to reusal of context, two areas were
able to move to setup: fonts (lists) and light.
Another area may be geometry lists to move
to the setup. I will look further.
NB. ===================================================
NB. Font demo
NB. ...
FIRST=: 1
setup=: 3 : 0
('arial';80;700;1) glaUseFontOutlines__ogl 32 95 32 0
0.3,WGL_FONT_POLYGONS
lighttext''
)
paint=: 3 : 0
gsinit GS_LIGHT
if. FIRST do. setup FIRST=: 0 end.
gscolor 3 1 # 0.5 1
NB. ...
NB. ===================================================
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