Interpolation and Extrapolation options for creating a Field from a Point Map

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.

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Keywords:

 import simulation field map point fields interpolation extrapolation linear random points interpolate extrapolate nearest barycentric natural 
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