Let's assume I have the following cube.Let's assume the isovalue = 0. I would like to draw the resulting triangles of the isosurface.I know that first I define which values are inside or outside comparing them to the given isovalue and after that we correspond to a particular list of edges.After that, we have somehow to linearly interpolate the points.I have read on an article that using this formula $P = P_1 + \frac{(iso -V_1)(P_2-P_1)}{V_2-V_1}$ we can get the interpolated values. Can someone demonstrate to me how I can interpolate the points in this case ? 
Linear interpolation on Plane (Marching Cubes)
algorithm;interpolation