Example for distorted surfaces about xrt

[kklmn]

Hi,

If you haven't done so yet, please uncomment see_the_bump() at the very end of the script and comment main() out. You will see the surface and some random samples that are put on the surface. Their color is given by z coordinate and it matches the surface color around them, so that most of these spots you don't even see. The gradient vectors also always directed from high to low values. So the interpolation does look correct.

It is another issue that you probably don't understand the implementation, but to call it incorrect, you should provide an evidence. What is it?

[brttmnl]

Ah ok, you do the transformation for local coordinates to array index using
coords = np.array( [(x-self.limPhysX[0]) / (self.limPhysX[1]-self.limPhysX[0]) * (self.warpNX-1),
(y-self.limPhysY[0]) / (self.limPhysY[1]-self.limPhysY[0]) * (self.warpNY-1)])
Then it fits.

I implemented a parabolic mirror with distortion, which then needed different coordinate transformations (parametric surface) and the usage of RegularGridInterpolator was more straight forward.
Thanks