From: "Damian Yerrick" <NOSP AT Msnews@pineight.8m.com>
Newsgroups: comp.os.msdos.djgpp
References: <ojK84.2278$W3 DOT 54472 AT news DOT tpnet DOT pl> <38637BBF DOT CC5A0C04 AT maths DOT unine DOT ch> <BxR84.2831$W3 DOT 67845 AT news DOT tpnet DOT pl>
Subject: Re: 3D Problem
Lines: 30
Organization: Pin Eight Software <http://pineight.8m.com/>
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 5.00.2919.6600
X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600
Message-ID: <WI694.241$9T4.4148@dfiatx1-snr1.gtei.net>
X-Trace: /ba9QeN/M5ty9nfxBiKPR/m3XA0354y44GuVThBSGqRIzslPy0QqB7lCWLphmuNhTsTp4uV8w+ZY!aQhgusOpKIpaaLTbFbWxuWfJLqnHxWYLxLXFn8Q7HS+fKNPfOP+t++kFt5DSRUa9Y+k=
X-Complaints-To: abuse AT gte DOT net
X-Abuse-Info: Please be sure to forward a copy of ALL headers
X-Abuse-Info: Otherwise we will be unable to process your complaint properly
NNTP-Posting-Date: Sat, 25 Dec 1999 16:58:30 GMT
Distribution: world
Date: Sat, 25 Dec 1999 16:58:30 GMT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

"Snowman" <idzy AT friko5 DOT onet DOT pl> wrote:
>     After that I use qsort() and sort the QUAD's in the FACE array.
>     Then,with quad3d(..) i put everything to a bitmap and then to screen.
>     First I was just checking the z-coordinate but it worked just partly.
:(
>     So I tried to calculate the distance from the (0,0,0) coordinate to
the
> points (using simply Pythagoras formula)
>     But it was also bad. :(((.

No sorting technique is perfect, but a straight z-coordinate sort
followed by a "Painter's" pass is nearly so. Look for Painter's
algorithm on Google.

--
Damian Yerrick    http://yerricde.tripod.com/
View full .sig:  http://www.rose-hulman.edu/~yerricde/sig.html










and now you must pay...