Functions for using DLP stereo with 3-D Ready Sync projectors and OpenGL
========================================================================

This Haskell package contains functions for rendering 3D stereo using DLP 3-D Ready Sync projectors and active-shutter stereo glasses.  It also includes [a sample application](https://youtu.be/l3rZbMB2XjM) and notes regarding hardware setup for DLP.  In particular, note that this technique does not require a graphics card that supports `GL_STEREO`.

The code conforms to the specification <<http://lists.gnu.org/archive/html/bino-list/2013-03/pdfz6rW7jUrgI.pdf>> and is based on the implementation for the stereo movie viewer Bino <<http://git.savannah.gnu.org/cgit/bino.git/tree/src/video_output.cpp?id=bino-1.6.1#n1389>>.

Please report issues at <<https://bwbush.atlassian.net/projects/HOGLDLP/issues/>>.


Skeletal example illustrating the use of frame-sequential DLP
-------------------------------------------------------------

```haskell
main :: IO ()
main = do
  _ <- getArgsAndInitialize
  initialDisplayMode $= [WithDepthBuffer, DoubleBuffered]
  _ <- createWindow \"DLP Stereo OpenGL Example\"
  depthFunc $= Just Less 
  idleCallback $= Just (postRedisplay Nothing)
  -- Use frame-sequential DLP encoding.
  dlpDisplayCallback $= def {dlpEncoding = FrameSequential, doDisplay = display}
  mainLoop

display :: DlpDisplayCallback
display eye = do
  -- Shift the view slightly, depending on for which eye to draw.
  translate $ Vector3 (if eye == LeftDlp then -0.05 else 0.05 :: GLfloat) 0 0 
  -- All of the rendering actions go here.
  renderPrimitive . . .
```


Notes on hardware and software
------------------------------

This code has been validated with the following configuration of hardware and software:

*   Optoma ML550 WXGA 500 Lumen 3D Ready Portable DLP LED Projector, running 120 Hz at 1024x768 resolution
*   Optoma ZD302 DLP Link Active Shutter 3D Glasses
*   Ubuntu 15.04, 64-bit
*   NVIDIA Driver Version 340.93, with `xorg.conf` option `Stereo` set to `8`
*   GHC 7.6.3
*   OpenGL == 2.8.0.0
*   GLUT == 2.4.0.0