[Ves] Android Kiwiviewer: change KiwiGlSurfaceView background color

Tue May 20 14:32:13 EDT 2014

Thanks for the suggestion Pat,

But I will want to be loading DICOM files as it is medical data I am visualising and as far as I know kiwiviewer does not support dicom files (does 2.0?). So since I was needing to extend the  vesKiwiDataLoader.cpp file anyway, and I want to perform some visualisation pipelines that don't seem to be in kiwiviewer e.g. texture/raycasting volume rendering, I thought that using ves and kiwi as an API to create my own application was the way forward.

Jamie
________________________________________
From: Pat Marion [james.patrick.marion at gmail.com]
Sent: 20 May 2014 18:05
To: Wright James (NHS Greater Glasgow & Clyde)
Cc: Aashish Chaudhary; ves at public.kitware.com
Subject: Re: [Ves] Android Kiwiviewer: change KiwiGlSurfaceView background color

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Jamie, you could try using the Kiwi scene file.  The scene file can be used to load one or more datasets and set visualization properties of the datasets and scene, including background color (solid color, gradient color, or textured image background).  The scene file is supported in the KiwiViewer 2.0 for iOS, but for Android you need to download the 2.0 apk from this link instead of the Google Play store:

http://packages.kitware.com/packages/application/view?applicationId=14

For an example of the scene file, check out this zip file here:

https://midas3.kitware.com/midas/item/34777

More documentation of the scene file format is here:

http://www.vtk.org/Wiki/VES/KiwiViewer_Scene_File#JSON_scene_file_for_KiwiViewer_v2.0

You can either bundle datasets with a .kiwi scene file in a zip, or distribute the .kiwi file standalone and reference datasets by url, KiwiViewer will download the data using http or ftp.

Pat

On Tue, May 20, 2014 at 8:21 AM, Wright James (NHS Greater Glasgow & Clyde) <jamie.wright at nhs.net<mailto:jamie.wright at nhs.net>> wrote:
Hi Pat and Aashish,

Thanks for your help in this. The task I'm trying to achieve is porting some VTK pipelines to visualise medical data that I have written in python onto an Android application for remote and portable viewing. Not being a programmer by trade, and not being able to work on this full time I am stretching the limits of my coding abilities trying to integrate the c++ api into the Android framework. I may have to go back and learn about Java JNI programming and openGL ES before I can achieve my aims.

Thanks for developing the VES and Kiwi libraries, I am sure they will very useful in the future

Jamie

Jamie Wright | Clinical Scientist | Nuclear Medicine
jamie.wright at nhs.net<mailto:jamie.wright at nhs.net>

________________________________
From: Pat Marion [james.patrick.marion at gmail.com<mailto:james.patrick.marion at gmail.com>]
Sent: 19 May 2014 21:01

To: Wright James (NHS Greater Glasgow & Clyde)
Cc: Aashish Chaudhary; ves at public.kitware.com<mailto:ves at public.kitware.com>

Subject: Re: [Ves] Android Kiwiviewer: change KiwiGlSurfaceView background color

Hi Jamie,

Ideally, the entire kiwi c++ api would be available to you to call directly from the java files.  The idea would be to use a tool like Swig to automatically generate java bindings.  I started a work-in-progress branch that explored using Swig to generate java and python bindings to Kiwi, but that work was not completed.  So for now, you must manually extend KiwiNative.java and KiwiNative.cpp to hand-write jni interface methods.  So you could do that, write a new jni interface, to set the background color from Java.  Or you could set the background color one time just in the setupGraphics() method of KiwiNative.cpp.  I guess I'd recommend going the jni route for most flexibility.  The jni methods are defined in KiwiNative.cpp and in KiwiNative.java.

Pat

On Mon, May 19, 2014 at 3:52 PM, Wright James (NHS Greater Glasgow & Clyde) <jamie.wright at nhs.net<mailto:jamie.wright at nhs.net>> wrote:
I had seen that method but I couldn't see where it was actually used to set the blue background.

When using the vesKiwi cpp files is the idea to access them through the JNI by calling them in KiwiNative.java and using them in other .java files? Or should I be editing the vesKiwi*.cpp files directly and rebuilding kiwiviewer each time? Apologies if this is explained on the wiki or elsewhere but I haven't been able to Google any results

Jamie

________________________________________
From: Aashish Chaudhary [aashish.chaudhary at kitware.com<mailto:aashish.chaudhary at kitware.com>]
Sent: 19 May 2014 17:01
To: Wright James (NHS Greater Glasgow & Clyde)
Cc: ves at public.kitware.com<mailto:ves at public.kitware.com>
Subject: Re: [Ves] Android Kiwiviewer: change KiwiGlSurfaceView background color

Have a look at the vesKiwiBaseApp.h and this method: setBackgroundColor.

Let me know if this helps.

- Aashish

On Mon, May 19, 2014 at 11:58 AM, Wright James (NHS Greater Glasgow & Clyde) <jamie.wright at nhs.net<mailto:jamie.wright at nhs.net><mailto:jamie.wright at nhs.net<mailto:jamie.wright at nhs.net>>> wrote:
Dear All,

I am trying to integrate VES into an Android application using the Kiwiviewer example application as a start. At present the default background color in the GlSurfaceView in this application is light blue. How can I change this to a different color? Apologies if this is an easy question but it's got me stumped.

thanks, Jamie

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--
| Aashish Chaudhary
| Technical Leader
| Kitware Inc.
| http://www.kitware.com/company/team/chaudhary.html

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