Java-Gaming.org Hi !
Featured games (83)
games approved by the League of Dukes
Games in Showcase (511)
Games in Android Showcase (119)
games submitted by our members
Games in WIP (577)
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  
  [SOLVED]Rotation around a point  (Read 526 times)
0 Members and 1 Guest are viewing this topic.
Offline DazKins
« Posted 2012-12-03 13:05:53 »

So i'm writing out a program to lock a camera to an entity or object in my game

The rotation works fine and seems to rotate correctly but the center about which it rotates is off.

I reckon i understand why it's not working i just don't know how to fix it

Here's the code

1  
2  
3  
4  
5  
6  
public void lockCameraToEntity(Entity e,float x,float y,float z){
   float hyp = (float)Math.sqrt(x*x+z*z);
   this.pos.x=(float)(-(e.pos.x+x) + (Math.sin(Math.toRadians(e.rot.y))*hyp)+hyp);
   this.pos.y=-(e.pos.y+y);
   this.pos.z=(float)(-(e.pos.z+z) + (Math.cos(Math.toRadians(e.rot.y))*hyp)+hyp);
}

DazKins

Check out my Dev Blog: http://dazkins.tumblr.com
Offline Jimmt
« League of Dukes »

JGO Kernel


Medals: 136
Projects: 4
Exp: 3 years



« Reply #1 - Posted 2012-12-03 23:20:38 »


I reckon i understand why it's not working i just don't know how to fix it

Well then, why is it not working?
Offline DazKins
« Reply #2 - Posted 2012-12-04 07:45:10 »

Its ok i got it fixed now

The issue was that i was adding the hypotenuse to the offset of each axis when instead i should have been adding the x and z offset parsed to to function

DazKins

Check out my Dev Blog: http://dazkins.tumblr.com
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.

Longarmx (50 views)
2014-10-17 03:59:02

Norakomi (39 views)
2014-10-16 15:22:06

Norakomi (31 views)
2014-10-16 15:20:20

lcass (36 views)
2014-10-15 16:18:58

TehJavaDev (66 views)
2014-10-14 00:39:48

TehJavaDev (65 views)
2014-10-14 00:35:47

TehJavaDev (56 views)
2014-10-14 00:32:37

BurntPizza (72 views)
2014-10-11 23:24:42

BurntPizza (44 views)
2014-10-11 23:10:45

BurntPizza (84 views)
2014-10-11 22:30:10
Understanding relations between setOrigin, setScale and setPosition in libGdx
by mbabuskov
2014-10-09 22:35:00

Definite guide to supporting multiple device resolutions on Android (2014)
by mbabuskov
2014-10-02 22:36:02

List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50

List of Learning Resources
by SilverTiger
2014-07-31 16:29:50

List of Learning Resources
by SilverTiger
2014-07-31 16:26:06
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!