Add pose demo

examples/14_pose/Activity.qml

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+/**
+ * @file Activity.qml
+ * @brief This file renders the scene in Qt3D
+ * @author Sergei Volodin
+ * @version 1.0
+ * @date 2018-08-03
+ */
+
+import Qt3D.Core 2.0
+import Qt3D.Extras 2.0
+
+/** @brief a cube at (0, 0, 0) */
+Entity {
+    components: [
+        // adding material
+        PhongMaterial { ambient: Qt.rgba(0.5, 0.5, 0.5, 1); },
+
+        // adding 5cm^3 cube
+        CuboidMesh { xExtent: 50; yExtent: 50; zExtent: 50 }
+    ]
+}

examples/14_pose/ar-pose.pro

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+##### QT
+# Name of the application
+TEMPLATE = app
+
+TARGET=ar-pose
+
+# Qt configuration for Quick applications
+QT += quick multimedia opengl multimediawidgets 3dinput 3drender
+CONFIG += c++11
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which as been marked deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+##### SOURCES/HEADERS (this project)
+SOURCES += main.cpp
+RESOURCES += qml.qrc
+
+# adding assets/ folder
+# See https://stackoverflow.com/questions/20573838/qt-5-2-including-external-file-into-an-android-package
+# https://forum.qt.io/topic/69946/qt-android-assets/4
+# https://falsinsoft.blogspot.ch/2017/01/qt-creator-include-additional-files.html
+assets.path = /assets
+assets.files += $$PWD/assets/*
+assets.depends += FORCE
+INSTALLS += assets

examples/14_pose/assets/camera_matrix.json

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+{
+    "camera_matrix": [
+		7.3321993364036177e+02, 0., 2.9429448615773646e+02, 0., 7.3321993364036177e+02, 6.8074088355361582e+01, 0., 0., 1.
+    ],
+    "width": 640,
+    "height": 480
+}