Java-Gaming.org Hi !
Featured games (90)
games approved by the League of Dukes
Games in Showcase (690)
Games in Android Showcase (201)
games submitted by our members
Games in WIP (764)
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  
  Difficulties trying to get the pick position from projection and view matrix  (Read 726 times)
0 Members and 1 Guest are viewing this topic.
Offline Nouht

Senior Newbie





« Posted 2013-11-24 19:39:09 »

Hello there. I am trying to get the pick position in terms of a vector3 from the projection and view matrix. I am using my own math classes. I don't think this is right, could you give any suggestions on how to fix this?

   private Vec3 getPick(Mat4 projection, Mat4 view) {
      Mat4 inverseProject = projection.copy().inverse();
      Mat4 pick = inverseProject.mul(view.copy());
      Vec3 pos = new Vec3(pick.m10, pick.m11, pick.m12);
      return pos;
   }

Cheers.
Offline RobinB

JGO Ninja


Medals: 44
Projects: 1
Exp: 3 years


Spacegame in progress


« Reply #1 - Posted 2013-11-24 19:51:18 »

Almost right.
If you want to get only the movement of a matrix you just do this:

1  
2  
3  
    public float getMoveX(){ return m03; }
    public float getMoveY(){ return m13; }
    public float getMoveZ(){ return m23; }


I dont know where you would need this for, but it does what you describe.
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 
xTheGamerPlayz (169 views)
2016-09-26 21:26:27

Wave Propagation (365 views)
2016-09-20 13:29:55

steveyg90 (478 views)
2016-09-15 20:41:23

steveyg90 (475 views)
2016-09-15 20:13:52

steveyg90 (517 views)
2016-09-14 14:44:42

steveyg90 (543 views)
2016-09-14 14:42:13

theagentd (515 views)
2016-09-12 16:57:14

theagentd (444 views)
2016-09-12 14:18:31

theagentd (312 views)
2016-09-12 14:14:46

Nihilhis (745 views)
2016-09-01 13:36:54
List of Learning Resources
by elect
2016-09-09 09:47:55

List of Learning Resources
by elect
2016-09-08 09:47:20

List of Learning Resources
by elect
2016-09-08 09:46:51

List of Learning Resources
by elect
2016-09-08 09:46:27

List of Learning Resources
by elect
2016-09-08 09:45:41

List of Learning Resources
by elect
2016-09-08 08:39:20

List of Learning Resources
by elect
2016-09-08 08:38:19

Rendering resources
by Roquen
2016-08-08 05:55:21
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!