My understanding is that gluOrtho2D is really just 3D with a near and far clipping plane of -1, and 1.

Could the flickering be a result of Z buffer issues?

Not sure but I sometimes see the same...

So if my video card supports multitexturing then it would be twice as fast?

By the way, thanks for the reply dorbie.

Hi All,

I am working on a little project where I use Ortho projection for drawing two overlapping planes.
I use blending so I can see the rear plane through the front plane.
My question is,...

Hi All,

I am working on a little project where I use Ortho projection for drawing two overlapping planes.
I use blending so I can see the rear plane through the front plane.
My question is,...

You might also try GLUI.
http://www.cs.unc.edu/~rademach/glui/

Good luck,
jpummill

Nehe at nehe.gamedev.net has a tutorial showing how to do this. I think it is tutorial 38.

Good luck,
jpummill

Min color is rgb(0,0,0).

I just went through this with the .tga loader from nehe's web site.

It wouldn't work on a Sun machine because Sun uses a "big endian" architecture and .tga's are saved as "little endian - read...

Thanks for the replies guys but I think I just found my problem.

Once again, it is with crappy ATI video drivers.

On my Nvidia Geforce card, the application works as it should.

Thanks again...

Hi All,

I am posting a link to my source and executable files. They are saved in .zip format.

If anyone is has time to look at this I would sure appreciate some feedback.

Again, the...

Thanks for the reply Deiussum.

I commented out the glEnable(GL_BLEND) line and also removed the glColor4f line.

I still have the banding problem. I really have no clue why this is happening.
...

I believe that Sun's OpenGL is still at version 1.2.3

Just checked Sun's site. They have a 1.3 beta available.

I am trying to learn to write cross platform OpenGL apps for Sun, Linux, HP, and...

I appreciate the replies. If anyone would like a look at my code here it is (minus the tgaload.cpp from nehe's tutorials).
-----------------------------------------
//---------------------
//-- ...

Not sure about correctly.

It is the tgaload.cpp file that can be found in Nehe's texture loading tutorials.

I have also specified what I think are the proper flags to the tgaload function:...

Hi All,

I was wondering if someone could explain this.

I have an image that looks fine when saved as a 24bit (RGB) texture (.tga format) but when I add an alpha channel and save it as a 32bit...

And the answer is??? PHOTOSHOP.

At least for this type of .raw file. In fact, Photoshop even guessed the bit depth, and resolution even though there is no header.

Pretty cool.

Thanks guys...

I am not very strong in math "yet" but I think this has something to do with using normal rotate functions and losing your point of reference.

The term that I have heard over and over is gimbal...

Photoshop can write to raw format???

The Gimp can't do that! I may have to switch http://www.opengl.org/discussion_boards/ubb/smile.gif

I have already tried wotsit. There was a reference to .raw format but I believe that is where I saw information leading me to believe that .raw was not a well defined standard.

If anyone is...

You could use a 3d modeling package to desing your plane and then use a library to load the 3d data into your application.

Some popular programs are:
3D Studio,
Lightwave,
Blender (freeware),...

Hi All,

I am trying to test my GL skills by remaking an old DirectX demo that used to be on the net called Trails (or Trails5) by a guy named Arne Gabriel.

I think I can now duplicate most of...

Hi All,

I am having a problem with blending.

If I load a texture (.bmp file format) that is black and white, then the white part shows up and the black part is transparent.

What I want is...

Anyone have an idea of how this program (dremples) works???

If you guys haven't looked at the program it is pretty cool.

I would like to be able render directly to the desktop. Does anyone out...

All of the tutorials on the web that I have seen for lighting just use OpenGL lighting.

Are their any tutorials that anyone is aware of that use software based lighting. Maybe a compare and...

How the heck do you get the console to go to the other monitor. I have been wondering how this would work even though I don't have a two monitor system yet.

jpummill