Path: chuka.playstation.co.uk!news
From: Tom <tm7130@bristol.ac.uk>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Questions, questions, questions
Date: Mon, 18 Jan 1999 10:27:31 +0000
Organization: PlayStation Net Yaroze (SCEE)
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Hi there,

I've recently started to write a 3d landscape engine using graduated
coloured triangles. I'm building the entire map in memory at the moment
using one tmd for every four points on the map which are created at run
time. This kind of limits the size of the map as each tmd and its
handler takes up loads of memory. What I want to do is dynamically
create each 2*2 patch as they come into view and remove them as they
leave the view cone. The thing is, I really don't have a clue how to
keep track of which parts of memory are free and which hold valid tmd
data.

Now, a (hopefully) much easier problem to answer. In the early version
of the engine that I've got so far, some of the patches that are being
drawn seem to be too far away and the PlayStation doesn't bother drawing
them. When they come back into view though, the program crashes. Is
there some way to avoid this or can I increase the clipping distance to
prevent the problem occuring?

Cheers, 

	Tom