Author: Donghao Ren, Four Eyes Lab and AlloSphere Research Group, UCSB.

AlloVolume is a CUDA-based application to support full-surround stereo volume rendering with interactive navigation for the UCSB Allosphere. It supports AMR (Adaptive Mesh Refinement) datasets.

AlloVolume's components:

• CUDA-based AMR Ray-casting Volume Renderer.

  • KD-Tree for fast ray-block intersection.
  • Customizable lens.
  • Pre-integration rendering method to produce high quality images fast.
  • Z-indexing for better cache utilization.
  • High definintion rendering using adaptive Runge-Kutta-Fehlberg method.

• HTML5-based Parameter Editor.

  • Transfer function editing.
  • Set rendering parameters and lens parameters.
  • Works across multiple devices (iPad / Laptop).

• Renderer / Controller for the UCSB Allosphere infstructure.

  • Read Allosphere calibration data, perform warping and blending (mono/stereo).
  • Multi-threaded rendering using the two available GPUs in each rendering machine.
  • Synchronizing renderers.
  • Interactive navigation in the volume.
  • ZeroMQ's EPGM-based broadcasting of datasets and rendering messages.
  • Websocket server for the HTML5-based parameter editor.

Install dependencies first:

• CUDA
• Boost
• ZeroMQ
• yaml-cpp
• Protobuf
• FreeImage
• freeglut (linux)

Build:

cd proto
make
cd ..
cd controller
make
cd ..
mkdir build
cd build
cmake .. -DCMAKE_BUILD_TYPE=Release
make

1. Copy renderer and controller to all rendering machines (or to the shared filesystem).
2. Write allovolume.yaml in the same directory.
3. Copy the datasets to somewhere accessible to the controller.
4. Launch controller on GR01.
5. Launch renderer on GR02-GR14 (with multishell or other methods).
6. Launch controller/server/server.py with python for the HTML5-based interface.
   • cd controller then python server/server.py, the same allovolume.yaml should present in the controller directory.
7. Launch controller/server/osc_pose.py to delegate pose messages from the DeviceServer and MaxMSP (currently parses PanoView's messages).

sync:
  # Broadcast endpoint and feedback endpoint.
  broadcast: epgm://[endpoint address];[multicast address (224.0.0.1)]:[port]
  feedback: tcp://[ip-address]:[port]

  # ZeroMQ parameters.
  zmq:
    rcvhwm: 50000
    sndhwm: 50000
    rcvbuf: 100000000
    sndbuf: 100000000
    rate: 10000000
    delay: 150000

allovolume:
  # Endpoint where controller listen for requests.
  controller: tcp://[ip-address]:[port]
  # Endpoint where controller send parameter update events.
  events: tcp://[ip-address]:[port]

  fullscreen: true
  stereo: true
  # Rendering resolution for each projector.
  resolution:
    width: 600
    height: 400

[hostname]:
  # Machine-specific overrides here.
  sync:
    braodcast: ...

BSDv3 License.