Doc: Add a skeleton for Scene 3D example docs

Without this fix, Qt Creator tags the example as "broken"
and hides it in the Examples tag in the Welcome screen.

Change-Id: Ifebc926b17a7161abb49c61a2369f8c485532156
Reviewed-by: Topi Reiniö <topi.reinio@theqtcompany.com>

2 files changed, 24 insertions, 0 deletions

diff --git a/examples/qt3d/scene3d/doc/images/scene3d.png b/examples/qt3d/scene3d/doc/images/scene3d.png
new file mode 100644
index 000000000..eee96f43b
--- /dev/null
+++ b/examples/qt3d/scene3d/doc/images/scene3d.png
diff --git a/examples/qt3d/scene3d/doc/src/scene3d.qdoc b/examples/qt3d/scene3d/doc/src/scene3d.qdoc
index e771c0192..fd324e6a4 100644
--- a/examples/qt3d/scene3d/doc/src/scene3d.qdoc
+++ b/examples/qt3d/scene3d/doc/src/scene3d.qdoc
@@ -29,4 +29,28 @@
     \example scene3d
     \title Qt 3D: Scene3D QML Example
     \ingroup qt3d-examples-qml
+    \brief A QML application that demonstrates visualizing a 3D scene.
+
+    \image scene3d.png
+
+    \e {Scene3D} demonstrates visualizing a 3D scene from a Qt Quick
+    application. The 3D scene contains a single active camera and a single
+    active light source. Visualized data is assumed to be at a fixed location.
+
+    \include examples-run.qdocinc
+
+    \section1 Visualizing 3D Scenes
+
+    We set up the 3D scene and specify the entity to animate in \e main.qml:
+
+    \quotefromfile scene3d/main.qml
+    \skipto Scene3D {
+    \printuntil }
+    \printuntil }
+
+    We specify the active camera in \e scene3d/AnimatedEntity.qml:
+
+    \quotefromfile scene3d/AnimatedEntity.qml
+    \skipto Camera
+    \printuntil }
 */