Java-Gaming.org    
Featured games (91)
games approved by the League of Dukes
Games in Showcase (578)
games submitted by our members
Games in WIP (499)
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  
  Generally agreed upon "mouse rotation" code?  (Read 629 times)
0 Members and 1 Guest are viewing this topic.
Offline nhmllr

Senior Member


Medals: 1
Projects: 3


slow and steady...


« Posted 2013-02-25 00:33:50 »

Often in 3D applications, like graphing programs and modelling programs, you'll be able to click somewhere on the screen and drag your mouse around, and the whole scene will rotate around the origin accordingly. I was wondering, what's the agreed upon math behind this? Has anyone done anything like this before? How should you translate the dragging on the mouse on the screen into rotation around the origin?

Thanks
Offline HeroesGraveDev

JGO Kernel


Medals: 212
Projects: 11
Exp: 2 years


If it wasn't Awesome, it wasn't me.


« Reply #1 - Posted 2013-02-25 05:52:19 »

Left-right = rotation aroud the y-axis.
Up-down = rotation round the x-axis.

Never rotate around the z-axis if possible. It disorientates people.

Offline sproingie
« Reply #2 - Posted 2013-02-25 06:19:30 »

You keep the camera a fixed distance away, and dragging left or right rotates ("orbits") the camera around the circle, keeping it pointed at the center.  Dragging up or down either tilts the circle (turntable camera) or raises the circle up or down latitudes in a sphere (orbiting camera) depending on the effect you're going for -- a game almost always uses an orbiting camera, otherwise it would clip through the ground, while a modeler will use a turntable camera.

It's all pretty easy to achieve with gluLookAt, which has several implementations including ones built in to JOGL and LWJGL, and you can probably find a GLSL implementation out there too.
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline Roquen
« Reply #3 - Posted 2013-02-25 14:25:13 »

Arcball (and similar) is pretty common.
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

xsi3rr4x (28 views)
2014-04-15 18:08:23

BurntPizza (25 views)
2014-04-15 03:46:01

UprightPath (40 views)
2014-04-14 17:39:50

UprightPath (22 views)
2014-04-14 17:35:47

Porlus (38 views)
2014-04-14 15:48:38

tom_mai78101 (62 views)
2014-04-10 04:04:31

BurntPizza (121 views)
2014-04-08 23:06:04

tom_mai78101 (221 views)
2014-04-05 13:34:39

trollwarrior1 (188 views)
2014-04-04 12:06:45

CJLetsGame (195 views)
2014-04-01 02:16:10
List of Learning Resources
by SHC
2014-04-18 03:17:39

List of Learning Resources
by Longarmx
2014-04-08 03:14:44

Good Examples
by matheus23
2014-04-05 13:51:37

Good Examples
by Grunnt
2014-04-03 15:48:46

Good Examples
by Grunnt
2014-04-03 15:48:37

Good Examples
by matheus23
2014-04-01 18:40:51

Good Examples
by matheus23
2014-04-01 18:40:34

Anonymous/Local/Inner class gotchas
by Roquen
2014-03-11 15:22:30
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!