Visualization of 2D height point data.

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1

I have height point data that shape of 2D matrix.
Which is best way to visualize that data.

2

Hi, friend,

Do you wish to view it as a “heat map” 2D image, as a 3D surface or as contour lines?

regards,

Paulo

3

Thanks, Paulo.

I want to view as 3D surface my data like the below image.
image
My data consists of float array value and it has different row spacing and col spacing.

So I try to use vtkImageData, but I don’t know how to do that.
Is it right way or not? Do I need another data object?

Regards.

4

Hello, friend,

Please, take a look at this code: https://github.com/PauloCarvalhoRJ/gammaray/blob/master/viewer3d/view3dbuilders.cpp . Look for a method called buildForSurfaceCartesianGrid2D(). A 2D Cartesian grid is exactly an array of values like yours. This will build a surface from your data.

regards,

Paulo

5

You could try something like this: InterpolateMeshOnGrid. I’m pretty sure the gridActor is the one you want. So comment out the line:

renderer->AddActor(randomActor);

The randomActor is just the surface.

Comment out:

gridActor->GetProperty()->SetColor(0.0, 0.0, 1.0); //(R,G,B)

and set:

 gridMapper->ScalarVisibilityOn();

This will give you a rather garish default height map. You can improve this by using color maps etc.

Once you are happy with what you are doing, look at a really complex example: ElevationBandsWithGlyphs

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