I am writing a program in openGL, and using NeHe''s base code. For some reason, when I run the compiled .exe file, when I quit, it doesn''t set my resolution back to what it was before I started the program. It didn''t used to do that, but it does now. Does anyone know what I could have goofed up ? Thanks a bunch. Also, does anyone know how to calculate the angle of a quad/tri in relation to another one ? Like the angle that they intersect or meet at ? That could be extremely helpful. The Kid I don''''t know what the future holds, but I know who holds the future.

It doesn''t set your res back becuase it has an error and doen''t reach that part

use your debugger/print statements to figure out exaclty where the program hangs.

for angle between quad/tri, find the normals for both the objects.

if normals are N1(x1,y1,z1) N2(x2,y2,z2) you can find angle between them using dot product

N1.N2 = |N1||N2|cos(theta)


N1.N2 works out to x1*x2 + y1*y2 + z1*z2
|N1| is sqrt(x1^2 + y1^2 + z^2)

do a cos inverse and then find angle theta!

i dun know if theres a simpler way

thanks a bundle boys. Until next time.

The Kid

I don''''t know what the future holds, but I know who holds the future.