Asking On OPENGL

Tango Issac Debian's Avatar, Join Date: May 2006
Go4Expert Member
hi,guys...
i am a newbie in OpenGL...some tpoics create conflicts
to me .....Ples help me.....

1) what is the default Axis and origin of the OpenGL??
2)When we draw a point as

glBegin(GL_POINTS);
glVertex3f(9.0f,0.8f,89.0f);
glEnd();

Here,in some codes the different programmers use (-ve) as
notifying vertex position...how is this possible??how
they think here as their Axis and origin???
pls help me...
regards tango
0
DaWei's Avatar, Join Date: Dec 2006
Team Leader
(-ve)
0
shabbir's Avatar, Join Date: Jul 2004
Go4Expert Founder
You are probably talking about specific program and I dont see anything that is such a strictness of assigning -ve values.

You can refer to the OpenGL program in SolarSystem--My first OpenGL program.
0
Tango Issac Debian's Avatar, Join Date: May 2006
Go4Expert Member
hai
Guys,
Thank very much to give me a
so good resource....

But, my asking is
1)in this program what is the position of
your 3D axis??Please say me
this i cannot understand...

2)At glTranslatef(-1.0,0.0f,-9.4f);

pLease explain me the meaning of the
Function??
Please!!!!!
Thanks guys
Tango