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OpenGL text problem

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Started by Beaverbutt8 November 25, 2005 01:36 PM

18 comments, last by Deception666 18 years, 4 months ago

Beaverbutt8

100

Author

November 25, 2005 01:36 PM

Hey guys, I got OpenGL text to work. The problem is that it functions the same way as a 3d model. If i turn the camera away - i can't see it. So, here's my question. How can i keep the text fixed on one position ( bottom left corner ) of the screen, regardless of what the camera does? A related question is how can i do the same thing with a .bmp that is the "Interface" of the game - what i mean is, like the ones you see in rpg's, a bar on the side, or top or whatever that shows your health, items, etc, etc. Thanks :D Mike

AAAP

137

November 25, 2005 01:44 PM

what i do because i suck is keep a relative coordinate which is always at the middle of the screen thats being rendered, but i believe there are ways to do overlays and stuff independant of the actual coordinates that are being looked at.
still, relative origin coordinates seem to work pretty well for me, might be a good started o_O. just make them move the same rate as your camera does and it should be ok

|aaap.penopticon.com| My website, including game projects. Collaboration/comments are welcome, please visit :)

cleves

148

November 25, 2005 01:47 PM

Hey,

Check this out, it may help you.

http://nehe.gamedev.net/data/lessons/lesson.asp?lesson=13

Beaverbutt8

100

Author

November 25, 2005 01:49 PM

The problem is that the camera is able to look up, down, left, and right

Deception666

182

November 25, 2005 02:00 PM

Make overlays the last step in rendering the scene.
Turn depth testing off.
Set the camera to an orthographic projection.
Load the identity matrix.
Begin rendering the text.

// revert the camera to orthographic modeg_pCamera->SwitchProjections(); if (g_bHideText) {    // push the matrix    glPushMatrix();    // load the identity matrix    glLoadIdentity();    // draw the text    g_pFPSText->Draw(rElapsedTime);    g_pStatText->Draw(rElapsedTime);    g_pHelpText->Draw(rElapsedTime);    // pop the matrix    glPopMatrix(); } // revert the camera to a perspective mode g_pCamera->SwitchProjections();