Summary

When you create a Field from Point Map, there is an option for Interpolation and Extrapolation. Watch the video (5:27) below to learn more about the different options and how they affect the data. 

Interpolation

• • Linear Interpolation: The linear middle ground that is based on how far away it is from the point and the other closest point.
  • Nearest Point: Looks for the closest point that is referenced in the point map and sets that value equal to there. Creates a Voronoi pattern, because it creates regions where there are closest volumes to a point.
  • Natural: A smoothened version of linear interpolation. Allows you to see quadratic patterns in the interpolation.
  • Barycentric: This should be used for points in a tetrahedral mesh, like FEA results. Linearly interpolates between the three closest points.

Extrapolation

• • Linear: Looks at the trend inside the interpolation region and extends it outward.
  • Nearest: Equal to whatever the closest value is at the edge.
  • Exponential: Looks at the next two points going in and develops a trend that extends out
  • None: Sets values equal to zero outside. This is the most common option but it doesn't work if the values in the areas outside the domain are needed.

Let’s get started.

More on this topic:

• How do I set up a simulation?
• How to use simulation results to create a Point Map or Field
• How can I export the displacement results from a simulation?