RaceViewer Infrastructure

making it visible

Slides

Symbiosis - the best of two worlds

RACE
- good at importing, routing and processing dynamic data in distributed systems
- needs (multi-display) geospatial visualization for flight data
- runs on JVM
- open sourced & .gov copyrighted
WorldWind
- good at rendering layered information on interactive map/globe via OpenGL
- needs data acquisition interface, UI framework
- runs on JVM
- open sourced & .gov copyrighted

RACE - WorldWind Integration

RACE
- async data interface for WW layers
- viewer sync
- configurable + extensible UI framework
WorldWind
- thread safety (thread safe use of Renderable objects)
- animation target viewpoint observer (viewer sync)

Big Picture: Configurable Extension Points

data: RACE⟷WorldWind ⟹ Layers
interaction: UI⟷WorldWind/RACE ⟹ Panels

Big Picture: Zoom In on Bridges

RACE Configuration

using normal RACE actor configuration:

universe { ..
  actors = [
    { name = "simPlane" ..
      write-to = "/flights/sim" .. },

    { name = "viewer"
      class = ".ww.RaceViewerActor"
      layers = [
        { name = "flightPos"
          class = "gov.nasa.race.ww.layers.FlightPosLayer"
          read-from = "/flights/sim"
          description = "flight positions"
          categories = ["data" ..] .. } ..
      ]
      layer-categories = ["data" ..]
      panels = [ .. ]
      size = [1400,1000]
      eye { lat = 37.246822 .. }

Data Integration

Data Integration on demand - ChannelTopics

don't overwhelm UI threads (0.1 sec rule) ⟹ ChannelTopic "producer valves"

Viewer Sync

UI Framework

Build Integration

WorldWind does not (yet) publish build artifacts
small modifications required by RACE
- rendering thread safety (concurrent Renderable modification)
- observable animation intentions (e.g. pan end-point)
ultimately merge, interim solution: use SBT RootProject

  ...
  lazy val wwjProject = RootProject( uri(
              sys.props.getOrElse("race.wwj_uri",
                  "git://github.com/pcmehlitz/WorldWindJava.git#pcm")))
  ...
  lazy val raceSwing = createProject("race-swing").
    dependsOn(raceCommon) ...

  lazy val raceWW = createProject("race-ww").
    dependsOn(wwjProject).
    dependsOn(raceCommon,raceData,raceCore,raceSwing) ...