From 70d155048fb81763b8df70de7e71517d23b886e9 Mon Sep 17 00:00:00 2001
From: David Rowe <david@ctrlaltstudio.com>
Date: Mon, 27 Jul 2015 14:43:32 -0700
Subject: [PATCH] Add SMI iViewHMD eye tracking as an optional library

---
 cmake/modules/FindiViewHMD.cmake       | 27 ++++++++++++++++++++++++++
 interface/CMakeLists.txt               |  2 +-
 interface/external/iViewHMD/readme.txt | 14 +++++++++++++
 3 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 cmake/modules/FindiViewHMD.cmake
 create mode 100644 interface/external/iViewHMD/readme.txt

diff --git a/cmake/modules/FindiViewHMD.cmake b/cmake/modules/FindiViewHMD.cmake
new file mode 100644
index 0000000000..eb107a2833
--- /dev/null
+++ b/cmake/modules/FindiViewHMD.cmake
@@ -0,0 +1,27 @@
+#
+#  FindiViewHMD.cmake
+#
+#  Try to find the SMI iViewHMD eye tracker library
+#
+#  You must provide a IVIEWHMD_ROOT_DIR which contains lib and include directories
+#
+#  Once done this will define
+#
+#  IVIEWHMD_FOUND - system found iViewHMD
+#  IVIEWHMD_INCLUDE_DIRS - the iViewHMD include directory
+#  IVIEWHMD_LIBRARIES - link this to use iViewHMD
+#
+#  Created on 27 Jul 2015 by David Rowe
+#  Copyright 2015 High Fidelity, Inc.
+#
+
+include("${MACRO_DIR}/HifiLibrarySearchHints.cmake")
+hifi_library_search_hints("iViewHMD")
+
+find_path(IVIEWHMD_INCLUDE_DIRS iViewHMDAPI.h PATH_SUFFIXES include HINTS ${IVIEWHMD_SEARCH_DIRS})
+find_library(IVIEWHMD_LIBRARIES NAMES iViewHMDAPI PATH_SUFFIXES lib HINTS ${IVIEWHMD_SEARCH_DIRS})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(iViewHMD DEFAULT_MSG IVIEWHMD_INCLUDE_DIRS IVIEWHMD_LIBRARIES)
+
+mark_as_advanced(IVIEWHMD_INCLUDE_DIRS IVIEWHMD_LIBRARIES IVIEWHMD_SEARCH_DIRS)
diff --git a/interface/CMakeLists.txt b/interface/CMakeLists.txt
index 0c44ac801f..46a83ea707 100644
--- a/interface/CMakeLists.txt
+++ b/interface/CMakeLists.txt
@@ -2,7 +2,7 @@ set(TARGET_NAME interface)
 project(${TARGET_NAME})
 
 # set a default root dir for each of our optional externals if it was not passed
-set(OPTIONAL_EXTERNALS "Faceshift" "Sixense" "LeapMotion" "RtMidi" "SDL2" "RSSDK")
+set(OPTIONAL_EXTERNALS "Faceshift" "Sixense" "LeapMotion" "RtMidi" "SDL2" "RSSDK" "iViewHMD")
 foreach(EXTERNAL ${OPTIONAL_EXTERNALS})
   string(TOUPPER ${EXTERNAL} ${EXTERNAL}_UPPERCASE)
   if (NOT ${${EXTERNAL}_UPPERCASE}_ROOT_DIR)
diff --git a/interface/external/iViewHMD/readme.txt b/interface/external/iViewHMD/readme.txt
new file mode 100644
index 0000000000..7e0af7e23e
--- /dev/null
+++ b/interface/external/iViewHMD/readme.txt
@@ -0,0 +1,14 @@
+
+Instructions for adding SMI HMD Eye Tracking to Interface on Windows
+David Rowe, 27 Jul 2015.
+
+1.  Download and install the SMI HMD Eye Tracking software from http://update.smivision.com/iViewNG-HMD.exe.
+
+2.  Copy the SDK folders (3rdParty, include, lib) from the SDK installation folder C:\Program Files (x86)\SMI\iViewNG-HMD\SDK 
+    into the interface/externals/iViewHMD folder. This readme.txt should be there as well.
+
+   You may optionally choose to copy the SDK folders to a location outside the repository (so you can re-use with different 
+   checkouts and different projects). If so, set the ENV variable "HIFI_LIB_DIR" to a directory containing a subfolder 
+   "iViewHMD" that contains the folders mentioned above.
+
+3. Clear your build directory, run cmake and build, and you should be all set.