I'm trying to compute the line intersecting my plane (transformed to NDC) and the near plane.
I have troubles to get a correct result and I think it is coming from the near plane equation.
I suppose that the equation in normalized device coordinates is \$N=(0,0,1)\$ and \$O=(0,0,near)\$.
But what is the value of \$near\$? Is it constant or it depends on the frustum?