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 (535)
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  
  devil help needed  (Read 846 times)
0 Members and 1 Guest are viewing this topic.
Offline g666

Junior Member

« Posted 2005-12-10 12:36:44 »

Ok all i want to do is load images into textures for a 2d game using devil, i want the origin of the images to be at the top left.

My problems are:

Why on earth do some image formats get loaded upside down when others dont?

How do i make alpha work?

desperately seeking sanity
Offline anarchotron

Junior Member

...precious bodily fluids.

« Reply #1 - Posted 2005-12-10 17:49:27 »

To flip the image, use ILU.iluFlipImage() after your IL.ilBindImage() call.

To get alpha, just make sure you have the right format in IL.ilCopyPixels, e.g.:

ByteBuffer data = BufferUtils.createByteBuffer(numPixels * 4);
IL.ilCopyPixels(0, 0, 0, width, height, 1, IL.IL_RGBA, IL.IL_BYTE, data);

Offline g666

Junior Member

« Reply #2 - Posted 2005-12-10 19:08:34 »

How can i find out if i need to flip the image?

desperately seeking sanity
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline anarchotron

Junior Member

...precious bodily fluids.

« Reply #3 - Posted 2005-12-11 00:50:42 »

You just have to know what kind of data is incoming.  In my experience, artists & their tools like to think of the texture UVS at the bottom left & top right as 0,0 & 1,1, respectively.  OpenGL image space is flipped from this (0,1 & 1,0)... I flip all my incoming textures as a matter of course.  I also flip my modelview matrix into a left-handed coordinate system to be consistent with what most artists are used to.
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.

E.R. Fleming (13 views)
2014-07-29 03:07:13

E.R. Fleming (4 views)
2014-07-29 03:06:25

pw (39 views)
2014-07-24 01:59:36

Riven (39 views)
2014-07-23 21:16:32

Riven (26 views)
2014-07-23 21:07:15

Riven (28 views)
2014-07-23 20:56:16

ctomni231 (59 views)
2014-07-18 06:55:21

Zero Volt (50 views)
2014-07-17 23:47:54

danieldean (42 views)
2014-07-17 23:41:23

MustardPeter (44 views)
2014-07-16 23:30:00
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 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‑
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!