Glut version of D3DXVec2TransformCoord() ?

[cronodragon]

Is there a function like D3DXVec2TransformCoord() in OpenGL/GLUT? According to MSDN docs:

"This function transforms the vector, pV (x, y, 0, 1), by the matrix, pM, projecting the result back into w=1."

Thanks in advance!
-Marco

EDIT: I can do the transformation, but I have no idea what they mean with projecting the result back into w=1. :?

[LP]

EDIT: I can do the transformation, but I have no idea what they mean with projecting the result back into w=1. :?

Just divide the contents of 3D vector (including "w" itself) by "w". You may also need to multiple the result by your viewport size and center it on the screen.

[cronodragon]

Ready! Thanks. No need to use the viewport or centering on the screen.