Hy,

Could anyone help me to understanding the glVertex3f coordinate? I want to understand the opengl coordinate system . . .

all three coordinate make confusing when specifying in 3d coordinate system? Where the x , y and z axis direction in opengl? Like in cartesian coordinate system x on bottm, y up and z outward . . .

Now take for instance glVertex3f(1, 1, -1) or glVertex3f(0, 0, -1). Where the point will plot ?

And last how there coordinate link with glMatrixMode or gluPerpective etc

Thanks