From 8befade007bd18c47db4ee3487e6828fe6f0bd88 Mon Sep 17 00:00:00 2001
From: Thijs Wenker <me@thoys.nl>
Date: Sun, 4 Oct 2015 15:08:35 +0200
Subject: [PATCH] expose position and orientation of HMD to Javascript.

- HMD.orientation
- HMD.position
---
 interface/src/scripting/HMDScriptingInterface.cpp | 14 ++++++++++++++
 interface/src/scripting/HMDScriptingInterface.h   |  8 ++++++++
 2 files changed, 22 insertions(+)

diff --git a/interface/src/scripting/HMDScriptingInterface.cpp b/interface/src/scripting/HMDScriptingInterface.cpp
index 68ac511eaf..4629ff5917 100644
--- a/interface/src/scripting/HMDScriptingInterface.cpp
+++ b/interface/src/scripting/HMDScriptingInterface.cpp
@@ -57,3 +57,17 @@ QScriptValue HMDScriptingInterface::getHUDLookAtPosition3D(QScriptContext* conte
 float HMDScriptingInterface::getIPD() const {
     return Application::getInstance()->getActiveDisplayPlugin()->getIPD();
 }
+
+glm::vec3 HMDScriptingInterface::getPosition() const {
+    if (Application::getInstance()->getActiveDisplayPlugin()->isHmd()) {
+        return glm::vec3(Application::getInstance()->getActiveDisplayPlugin()->getHeadPose()[3]);
+    }
+    return glm::vec3();
+}
+
+glm::quat HMDScriptingInterface::getOrientation() const {
+    if (Application::getInstance()->getActiveDisplayPlugin()->isHmd()) {
+        return glm::quat_cast(Application::getInstance()->getActiveDisplayPlugin()->getHeadPose());
+    }
+    return glm::quat();
+}
diff --git a/interface/src/scripting/HMDScriptingInterface.h b/interface/src/scripting/HMDScriptingInterface.h
index 82b444abaa..1ac524d7f1 100644
--- a/interface/src/scripting/HMDScriptingInterface.h
+++ b/interface/src/scripting/HMDScriptingInterface.h
@@ -20,6 +20,8 @@ class HMDScriptingInterface : public QObject {
     Q_OBJECT
     Q_PROPERTY(bool magnifier READ getMagnifier)
     Q_PROPERTY(bool active READ isHMDMode)
+    Q_PROPERTY(glm::vec3 position READ getPosition)
+    Q_PROPERTY(glm::quat orientation READ getOrientation)
     Q_PROPERTY(float ipd READ getIPD)
 public:
     static HMDScriptingInterface& getInstance();
@@ -36,6 +38,12 @@ private:
     bool isHMDMode() const { return Application::getInstance()->isHMDMode(); }
     float getIPD() const;
 
+    // Get the position of the HMD
+    glm::vec3 getPosition() const;
+    
+    // Get the orientation of the HMD
+    glm::quat getOrientation() const;
+
     bool getHUDLookAtPosition3D(glm::vec3& result) const;
 
 };