delorie.com/archives/browse.cgi | search |
From: | "Silvio Darzo" <lab_darzo AT libero DOT it> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: ALLEGRO: help with ARC |
Date: | Tue, 25 Feb 2003 09:50:21 +0000 (UTC) |
Organization: | Mailgate.ORG Server - http://www.Mailgate.ORG |
Lines: | 45 |
Message-ID: | <f0b8d984dfae606d854c3ff1e4f26202.113557@mygate.mailgate.org> |
References: | <8d3750b48cafc870dd036fac3f43e856 DOT 113557 AT mygate DOT mailgate DOT org> <inkk5vc2iv05t512p73ot3sb5jmq19958v AT 4ax DOT com> |
NNTP-Posting-Host: | host227-148.pool217223.interbusiness.it |
X-Trace: | news.mailgate.org 1046146155 11993 217.223.148.227 (Tue Feb 25 10:50:21 2003) |
X-Complaints-To: | abuse AT mailgate DOT org |
NNTP-Posting-Date: | Tue, 25 Feb 2003 09:50:21 +0000 (UTC) |
Injector-Info: | news.mailgate.org; posting-host=host227-148.pool217223.interbusiness.it; posting-account=113557; posting-date=1046146155 |
User-Agent: | Mailgate Web Server |
X-URL: | http://mygate.mailgate.org/mynews/comp/comp.os.msdos.djgpp/f0b8d984dfae606d854c3ff1e4f26202.113557%40mygate.mailgate.org |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
> > The start angle, ang1 is 30, this is a twelth of a circle. > a twelth of 256 is 21.3 recurring > > the end angle is 300 this is 5/6 of a circle and 5/6 > of 256 is 213.3 recurring > > So, I would say that ang1 should be 21.333 > and ang2 should be 213.333 > > Never used the arc() function myself, but this feels about right > > Kev. I thought it was light that but the problem are 16.16 fixed point numbers. I now found out functions like int fixtoi(fixed x); converting an integer to a fixed and it works fine try this: arc(screen,x+10,y+10,itofix(64),itofix(128),10,col); arc(screen,x+10,y+h-10,itofix(128),itofix(192),10,col); arc(screen,x+w-10,y+10,itofix(0),itofix(64),10,col); arc(screen,x+w-10,y+h-10,itofix(192),itofix(256),10,col); hline(screen,x+10,y,x+w-10,col); hline(screen,x+10,y+h,x+w-10,col); vline(screen,x,y+10,y+h-10,col); vline(screen,x+w,y+10,y+h-10,col); byebye helen -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG
webmaster | delorie software privacy |
Copyright © 2019 by DJ Delorie | Updated Jul 2019 |