Hi all.

I'm working on a height-map project and have run into a brick wall, so thought I'd try here for help.

I have a map of 3D points or nodes. These are regularly spaced in 2 dimensions: x and z, but the y coordinate randomly varies.

What I want to do is to find the y coordinate of an arbitrary point anywhere between my nodes,assuming that the nodes are connected by straight lines to their neighbours.

eg.

say I have 4 points.

{0, 1.5, 0}

{10, 3.5, 0}

{0, 1.5, 10}

{10, 4.5, 10}

Can we find {5, y, 5} ?

Many thanks for any pointers.