Java-Gaming.org Hi !
Featured games (84)
games approved by the League of Dukes
Games in Showcase (602)
Games in Android Showcase (171)
games submitted by our members
Games in WIP (649)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Ray Tracing Distortion  (Read 1614 times)
0 Members and 1 Guest are viewing this topic.
Offline novasharp

Junior Devvie


Medals: 1
Projects: 1


Gamemaker


« Posted 2013-04-03 00:14:58 »

My ray tracer works, but when I try to render a sphere with 60 degree fovy, 1820x1080, there is a large amount of distortion.

Ideas?

novasharp
Offline theagentd

« JGO Bitwise Duke »


Medals: 522
Projects: 3
Exp: 8 years



« Reply #1 - Posted 2013-04-03 00:33:57 »

My bet is the aspect ratio: width/height ---> (float)width/height

Myomyomyo.
Offline novasharp

Junior Devvie


Medals: 1
Projects: 1


Gamemaker


« Reply #2 - Posted 2013-04-03 00:51:59 »

I use:
1  
fovx = fovy * width / height;

and
1  
2  
3  
alpha = Math.tan(Math.toRadians(fovx / 2)) * (pixel[0] - (width / 2)) / (width / 2);
beta = Math.tan(Math.toRadians(fovy / 2)) * ((height / 2) - pixel[1]) / (height / 2);
dir = normalize(sub(add(scale(uTemp, alpha), scale(vTemp, beta)), wTemp));

novasharp
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline novasharp

Junior Devvie


Medals: 1
Projects: 1


Gamemaker


« Reply #3 - Posted 2013-04-03 19:03:00 »

Found the problem. I thought the ratio was:
1  
fovx / fovy = width / heigth

I dound it was:
1  
tan(fovx / 2) / tan(fovy / 2) = width / height

novasharp
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 
Jesse (15 views)
2015-07-29 04:35:27

Riven (37 views)
2015-07-27 16:38:00

Riven (18 views)
2015-07-27 15:35:20

Riven (21 views)
2015-07-27 12:26:13

Riven (12 views)
2015-07-27 12:23:39

BurntPizza (30 views)
2015-07-25 00:14:37

BurntPizza (42 views)
2015-07-24 22:06:39

BurntPizza (24 views)
2015-07-24 06:06:53

NoxInc (31 views)
2015-07-22 22:16:53

NoxInc (18 views)
2015-07-22 22:13:39
List of Learning Resources
by gouessej
2015-07-09 11:29:36

How Do I Expand My Game?
by bashfrog
2015-06-14 11:34:43

List of Learning Resources
by PocketCrafter7
2015-05-31 05:37:30

Intersection Methods
by Roquen
2015-05-29 08:19:33

List of Learning Resources
by SilverTiger
2015-05-05 10:20:32

How to: JGO Wiki
by Mac70
2015-02-17 20:56:16

2D Dynamic Lighting
by ThePixelPony
2015-01-01 20:25:42

How do I start Java Game Development?
by gouessej
2014-12-27 19:41:21
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!