How can I generate new points for the gaps on the cable?

Hello to everybody, I have a point cloud data (X,Y,Z coordinates;as a hint:Z values are almost the same, you can assume it is a 3D-line) for a power cable from the laser scanner but in some places there are gaps[no points in this area or not enough]. I have to fill these gaps by using available points. How can I do that on Matlab? I don't know if it is possible or not.I need your help.

Thanks a lot in advance.

[Jon]

Search for 3D interpolation. You will need to decide what kind of interpolant to use (probably linear or cubic spline).