[Paraview-developers] Reader for point cloud stored on custom binary file

[Ellon Paiva]

I decided to follow your advice and installed paraview 5.0.1 from 
source. The code seemed to work, but I don't see any point in the 
screen. I can see in the information tab that all points were loaded, 
but the vtkPolyData has zero cells. How can I add the the points to 
cells? Specifically, I would like to have one point per cell.

Ellon

On 04/22/2016 04:15 PM, Favre Jean wrote:
>
> my suggestion would be to use some more numpy-oriented features. Your 
> "points" array is already a numpy array, you can feed it to the 
> vtkPolyData with a simple reshaping. Same for your reflectance array. 
> No need for a for-loop
>
> I'd replace your code with this:
>
> filename = "worked.bin"
>
> points = load_velodyne_points(filename)
> N=points.shape[1]
> # use "output" as the pre-defined vtkPolyData object
> output.Points = points[0:3,].reshape(N, 3)
> output.PointData.append(points[3,], "reflectance")
>
> I usually skip building up cells, because I use a PointGaussian 
> representation mode. But your needs might differ. Anyway, with the 
> changes above, I can read all 3 files without any problem.
>
> -----------------
> Jean

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