Java-Gaming.org    
Featured games (79)
games approved by the League of Dukes
Games in Showcase (477)
Games in Android Showcase (107)
games submitted by our members
Games in WIP (534)
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  
  Question regarding interaction between VAO bindings and sperate VBO bindings  (Read 538 times)
0 Members and 1 Guest are viewing this topic.
Offline greenOwl

Junior Member


Medals: 1


from Germany


« Posted 2013-03-24 19:40:36 »

Hello,

I've got the following question for you:
When I set up my VAO I bind the VAO (glBindVertexArray) then bind the VBO (glBindBuffer(GL_ARRAY_BUFFER)) and IBO (glBindBuffer(GL_ELEMENT_ARRAY_BUFFER)) and then unbind the VAO. As I understand it now the VBO and the IBO are "connected" to the VAO and before I want to draw something I just have to call glBindVertexArray() (without binding the VBO and IBO again).

Now, can I bind the VBO / IBO separately (e.g. for calling glBufferSubData()) and don't lose the "connection" between VAO and VBO / IBO (or do I have to go through the hole binding VAO, then VBO/IBO again)?

I ask this question because I changed up some code (for optimizing performance) and now I get a
1  
org.lwjgl.opengl.OpenGLException: Cannot use offsets when Element Array Buffer Object is disabled 
I can't quite trace back where the problem is.
EDIT: Found the problem that caused the exception (missing glGenBuffers() call  Roll Eyes). Question above remains but now I think that I can bind/unbind the VBO/IBO as much as I want without losing the "connection". I'd be very grateful if some could confirm.
Thanks!

elfeck
Offline ra4king

JGO Kernel


Medals: 337
Projects: 2
Exp: 5 years


I'm the King!


« Reply #1 - Posted 2013-03-24 20:42:17 »

No, the state is stored in the VAO and it shouldn't be modified if you use the VBO for different purposes AFAIK.

Offline greenOwl

Junior Member


Medals: 1


from Germany


« Reply #2 - Posted 2013-03-25 19:54:58 »

Thank you, everything works now and I can confirm:
You can bind and unbind the VBO / IBO as much as you want without disturbing the VAO.

elfeck
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.

pw (35 views)
2014-07-24 01:59:36

Riven (33 views)
2014-07-23 21:16:32

Riven (21 views)
2014-07-23 21:07:15

Riven (24 views)
2014-07-23 20:56:16

ctomni231 (55 views)
2014-07-18 06:55:21

Zero Volt (47 views)
2014-07-17 23:47:54

danieldean (38 views)
2014-07-17 23:41:23

MustardPeter (43 views)
2014-07-16 23:30:00

Cero (59 views)
2014-07-16 00:42:17

Riven (56 views)
2014-07-14 18:02:53
HotSpot Options
by dleskov
2014-07-08 03:59:08

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:58:24

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:47:22

How do I start Java Game Development?
by ra4king
2014-05-17 11:13:37

HotSpot Options
by Roquen
2014-05-15 09:59:54

HotSpot Options
by Roquen
2014-05-06 15:03:10

Escape Analysis
by Roquen
2014-04-29 22:16:43

Experimental Toys
by Roquen
2014-04-28 13:24:22
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!