Have a look at https://github.com/topics/scattered-data-interpolation and https://stackoverflow.com/questions/16048263/matlab-griddata-equivalent-in-c

Have a look at VTK (The Visualization Toolkit) and ITK (

Insight Segmentation and Registration Toolkit).

I haven't encountered your problem so far. However, I think the following should help:

http://vtk.1045678.n5.nabble.com/Interpolating-scattered-2D-data-td5720736.html

I have also written some Persian tutorials for using VTK some years ago. You can find them here:

http://deeperai.blog.ir/post/my-old-weblog

Hello,

Have a look at DISLIN library

The link is http://www.mps.mpg.de/dislin