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OGL co-ordinate systems.


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#1 Vlion   Members   -  Reputation: 151

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Posted 21 July 2001 - 05:40 PM

Hi. Is the z-plane right-positive or left-positive ? Also...should this cut of code display anything ? gluLookAt(0, 0, 6, 0, 0, 0, 0, 1, 0); glBegin(GL_LINES); { glVertex3f(0, 0, -1); glVertex3f(1, 1, -1); glVertex3f(1, 0, -1); } glEnd(); Also, I`m getting thrown into 256 color after switching from 16bpp to 16bpp. I saved the DEVMODE into a variable to hold the old data, then called ChangeDisplaySettings() on the old data when my prog exits. This is kinda strange...any ideas ? Oh yeah...at 16bpp my 3D card accelerates stuff...a Voodoo 3 ~V''lion I came, I saw, I got programmers block. ~V''''lion

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#2 Obelix   Members   -  Reputation: 122

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Posted 22 July 2001 - 05:07 AM

The Z-axis is pointing out of the screen I think that is called right handed (50% probability ).
Yes, the code should show some lines if the other variables has the right values.

If you are using CDS_FULLSCREEN should you be able to reset the old values without having to save them in some variable. See the NeHe tutorials.




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