[Paraview] color mapping + interpolation of areas of a pre-existing model's surface.

[Moreland, Kenneth]

Mark,

I cannot think of any straightforward way to interpolate scalar values sparsely dispersed across a mesh.

I think a much more straightforward approach would be to use these dots in 3D space to define a function f(x,y,z) that interpolates values in all 3D space, and then use either the array calculator or the Python calculator to compute that value at each point.

-Ken

From: Mark Belan <belanma at mcmaster.ca<mailto:belanma at mcmaster.ca>>
Date: Monday, January 26, 2015 at 12:12 PM
To: "paraview at paraview.org<mailto:paraview at paraview.org>" <paraview at paraview.org<mailto:paraview at paraview.org>>
Subject: [EXTERNAL] [Paraview] color mapping + interpolation of areas of a pre-existing model's surface.

Hello all,

I am trying to develop a surface spatial distribution of data onto a pre-existing 3D model. The model I currently have is composed of some 80K polygons in mesh format (.obj file, captured via 3D scanner) and what I'm trying to figure out is how to assign several areas of the mesh with values (ie: isotopic data) and have the areas interpolate to cover the surface.

The images I've attached include the current model I am working on and the approximate size and areas of where I'm sampling.

I'm wondering if instead of assigning scalars to each and every vertex of the model, is it possible to assign scalars to groups of polygons and interpolate this way? (that is, assign the "dots" in the "example" image with values and have the "dots" interpolate amongst each other over the surface of the model)?

Ideally, this would include much more than just 3 measurements but I am trying to familiarize a general process of creating this before I receive actual data.

If not, any guidance or suggestions to achieve the representation I want?

Thanks in advance for your help, I understand this may be a very unique goal for Paraview.

- Mark

--
Mark Belan, B. Art Sc.
M. Sc. Candidate - Astrobiology
Lewis and Ruth Sherman Graduate Fellow
McMaster University
School of Geography and Earth Sciences
GSB 323
1280 Main Street West
Hamilton, Ontario
Canada
L8S 4L8
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