Java-Gaming.org Hi !
Featured games (83)
games approved by the League of Dukes
Games in Showcase (539)
Games in Android Showcase (133)
games submitted by our members
Games in WIP (603)
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  
  Apply transparency to glCallList  (Read 1569 times)
0 Members and 1 Guest are viewing this topic.
Offline davicente

Senior Newbie





« Posted 2010-07-22 10:45:23 »

Hi:

I´m working with heavy lists. And I want to change the transparency of all elements of the list. Now I´m deleting and creating the list again, what is very inefficient and it works very slow. The question is if it is possible to apply a global transparency to one list just before I draw it  ( glCallList ).

Regards.
Offline ryanm

Senior Devvie


Projects: 1
Exp: 15 years


Used to be bleb


« Reply #1 - Posted 2010-07-22 11:21:38 »

There's no way to alter what is in the display list after it has been defined. The only way to alter the colour of what is rendered is to make the glColor or glMaterial calls before glCallList, and ensure that the display list contains no glColor/glMaterial calls itself. This is probably not an option for you.
I'm assuming that you're specifying vertices and colours in immediate mode (glBegin/End blocks). You should consider moving to VBOs - they will keep the data in VRAM as with a display list, but you can also alter it at will.
Offline davicente

Senior Newbie





« Reply #2 - Posted 2010-07-22 11:31:24 »

I suppose I have no choise.
Thanks for your quickly answer.
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.

Mr.CodeIt (4 views)
2014-12-23 03:34:11

rwatson462 (38 views)
2014-12-15 09:26:44

Mr.CodeIt (31 views)
2014-12-14 19:50:38

BurntPizza (62 views)
2014-12-09 22:41:13

BurntPizza (99 views)
2014-12-08 04:46:31

JscottyBieshaar (60 views)
2014-12-05 12:39:02

SHC (74 views)
2014-12-03 16:27:13

CopyableCougar4 (77 views)
2014-11-29 21:32:03

toopeicgaming1999 (138 views)
2014-11-26 15:22:04

toopeicgaming1999 (127 views)
2014-11-26 15:20:36
Resources for WIP games
by kpars
2014-12-18 10:26:14

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
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!