Particle editor

[lucas-wilkins]

I've made a new perspective which gives a simple interface for describing arbitrary particles. It's now at a stage where the basic bits work. Basically, just numerically integrate a particle defined by a function, with a bunch of GUI stuff to make it as painless as possible (e.g. visualisations, special syntax highlighting, automated conversion of coordinates). I'm looking for early feedback on the interface and workflow (i.e. high level comments, not a list things that don't work, I know what those are).

It's currently not integrated into SasView properly, but it can be run by executing the script at sas.qtgui.Perspectives.ParticleEditor.DesignWindow

The plan is (assuming I fix the problem below) to add the following functionalities, which are only placeholders right now:

1. Magnetism
2. Parametric functions to allow fitting
3. More helper functions for building shapes
   i) function composition with rotations and translations
   ii) built-in shapes
4. More kinds of polydispersity (inc ensembles of random particles)
5. Structure factors
6. GPU acceleration

[lucas-wilkins]

I'd like to merge this before the codecamp, it's not complete, but it's almost completely isolated from everything else, but would good to have things merged for the sake of simplicity.

[rozyczko]

How to access this perspective? It doesn't show up in the list

[lucas-wilkins]

How to access this perspective? It doesn't show up in the list

Run DesignWindow.py (full path above)

[wpotrzebowski]

@wpotrzebowski to review before the code camp

[wpotrzebowski]

Works as expected and it doesn't seem to affect main code base