The Basics of Raytracing

DmEditor · 11-04-2003, 07:09 PM

The Basics of Raytracing
Author: Tom Hammersley
Description: The author runs through the basics of raytracing, the alogrithm, and some implementation techniques.

Mihail121 · 11-26-2003, 03:43 AM

OH YEAH!!!!

That article sure ROXXX!!! I succeeded to make a basic raytracer last night with simple one colored spheres. It's not big deal really but i'm sure glad i started that. Once again - great tutorial.

P.S.

Hey, don't forget to write some more articles on that subject!

Loy · 02-26-2007, 01:27 PM

Nice article, but i've discovered that a formula is not correct.
The simplification of the abc-formule leaves a out, which cannot be be correct, because the root of a is not equal to a .

The abc-formula is in its simplest form in the upper image

Reedbeta · 02-26-2007, 01:32 PM

Loy, the simplification works if you assume the ray direction is normalized; then a = 1. This is a standard optimization trick for ray-sphere intersection.

02-26-2007, 01:27 PM	#3
Loy New Member Join Date: Feb 2007 Location: The Netherlands Posts: 1	Re: The Basics of Raytracing Nice article, but i've discovered that a formula is not correct. The simplification of the abc-formule leaves a out, which cannot be be correct, because the root of a is not equal to a . The abc-formula is in its simplest form in the upper image

02-26-2007, 01:32 PM	#4
Reedbeta DevMaster Staff Join Date: Oct 2004 Location: Seattle, WA Posts: 3,707	Re: The Basics of Raytracing Loy, the simplification works if you assume the ray direction is normalized; then a = 1. This is a standard optimization trick for ray-sphere intersection. ___________________________________________ Currently working at Sucker Punch reedbeta.com - OpenGL demos and other projects Luabridge - a lightweight, dependency-free C++/Lua binding library. CD Lite - an unobtrusive, minimal CD player application for Windows.

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11-04-2003, 07:09 PM	#1
DmEditor DevMaster Editor Join Date: Jan 2005 Posts: 54	The Basics of Raytracing Author: Tom Hammersley Description: The author runs through the basics of raytracing, the alogrithm, and some implementation techniques.

11-26-2003, 03:43 AM	#2
Mihail121 Senior Member Join Date: Jan 2003 Posts: 868	OH YEAH!!!! That article sure ROXXX!!! I succeeded to make a basic raytracer last night with simple one colored spheres. It's not big deal really but i'm sure glad i started that. Once again - great tutorial. P.S. Hey, don't forget to write some more articles on that subject!