diff --git a/src/Viewer/CameraGroup.cxx b/src/Viewer/CameraGroup.cxx
index 3ec5f6853..586e5bbad 100644
--- a/src/Viewer/CameraGroup.cxx
+++ b/src/Viewer/CameraGroup.cxx
@@ -24,6 +24,7 @@
#include "WindowBuilder.hxx"
#include "WindowSystemAdapter.hxx"
#include "sview.hxx"
+#include "VRManager.hxx"
#include <simgear/math/SGRect.hxx>
#include <simgear/props/props.hxx>
@@ -494,6 +495,10 @@ CameraInfo* CameraGroup::buildCamera(SGPropertyNode* cameraNode)
return nullptr;
}
+ // Set vr-mirror flag so camera switches to VR mirror when appropriate.
+ if (cameraNode->getBoolValue("vr-mirror", false))
+ cameraFlags |= CameraInfo::VR_MIRROR;
+
osg::Matrix vOff;
const SGPropertyNode* viewNode = cameraNode->getNode("view");
if (viewNode) {
@@ -700,11 +705,16 @@ CameraInfo* CameraGroup::buildCamera(SGPropertyNode* cameraNode)
SViewSetCompositorParams(options, compositor_path);
- Compositor *compositor = Compositor::create(_viewer,
- window->gc,
- viewport,
- compositor_path,
- options);
+ Compositor *compositor = nullptr;
+ if (info->flags & CameraInfo::VR_MIRROR)
+ compositor = buildVRMirrorCompositor(window->gc, viewport);
+ if (!compositor)
+ compositor = Compositor::create(_viewer,
+ window->gc,
+ viewport,
+ compositor_path,
+ options);
+
if (compositor) {
info->compositor.reset(compositor);
} else {
@@ -807,6 +817,50 @@ void CameraGroup::buildGUICamera(SGPropertyNode* cameraNode,
camera->setStats(0);
}
+Compositor *CameraGroup::buildVRMirrorCompositor(osg::GraphicsContext* gc,
+ osg::Viewport *viewport)
+{
+#ifdef ENABLE_OSGXR
+ if (VRManager::instance()->getUseMirror()) {
+ Camera* camera = new Camera;
+ camera->setName("VRMirror");
+ camera->setAllowEventFocus(false);
+ camera->setGraphicsContext(gc);
+ camera->setViewport(viewport);
+ camera->setClearMask(0);
+ camera->setInheritanceMask(CullSettings::ALL_VARIABLES
+ & ~(CullSettings::COMPUTE_NEAR_FAR_MODE
+ | CullSettings::CULLING_MODE
+ | CullSettings::CLEAR_MASK
+ ));
+ camera->setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
+ camera->setCullingMode(CullSettings::NO_CULLING);
+ camera->setProjectionResizePolicy(Camera::FIXED);
+
+ // The camera group will always update the camera
+ camera->setReferenceFrame(Transform::ABSOLUTE_RF);
+
+ // Mirror camera needs to be drawn after VR cameras and before GUI
+ camera->setRenderOrder(Camera::POST_RENDER, 9000);
+
+ // Let osgXR do the mirror camera setup
+ VRManager::instance()->setupMirrorCamera(camera);
+
+ Pass *pass = new Pass;
+ pass->camera = camera;
+ pass->useMastersSceneData = false;
+
+ // We just build a simple Compositor directly from C++ space that
+ // encapsulates a single osg::Camera.
+ Compositor *compositor = new Compositor(_viewer, gc, viewport);
+ compositor->addPass(pass);
+
+ return compositor;
+ }
+#endif
+ return nullptr;
+}
+
CameraGroup* CameraGroup::buildCameraGroup(osgViewer::View* view,
SGPropertyNode* gnode)
{
@@ -994,11 +1048,16 @@ void reloadCompositors(CameraGroup *cgroup)
std::string compositor_path = info->compositor_path.empty() ?
fgGetString("/sim/rendering/default-compositor", "Compositor/default") :
info->compositor_path;
- info->compositor.reset(Compositor::create(cgroup->_viewer,
- gc,
- viewport,
- compositor_path,
- options));
+ Compositor *compositor = nullptr;
+ if (info->flags & CameraInfo::VR_MIRROR)
+ compositor = cgroup->buildVRMirrorCompositor(gc, viewport);
+ if (!compositor)
+ compositor = Compositor::create(cgroup->_viewer,
+ gc,
+ viewport,
+ compositor_path,
+ options);
+ info->compositor.reset(compositor);
if (info->reloadCompositorCallback.valid())
info->reloadCompositorCallback->postReloadCompositor(cgroup, info);
@@ -1041,6 +1100,8 @@ void CameraGroup::buildDefaultGroup(osgViewer::View* viewer)
masterCamera = cgroupNode->getChild("camera", cameras.size(), true);
setValue(masterCamera->getNode("window/name", true),
windowBuilder->getDefaultWindowName());
+ // Use VR mirror compositor when VR is enabled.
+ setValue(masterCamera->getNode("vr-mirror", true), true);
}
SGPropertyNode* nameNode = masterCamera->getNode("window/name");
if (nameNode)
diff --git a/src/Viewer/CameraGroup.hxx b/src/Viewer/CameraGroup.hxx
index 6e0bc58aa..ce5ccf363 100644
--- a/src/Viewer/CameraGroup.hxx
+++ b/src/Viewer/CameraGroup.hxx
@@ -70,7 +70,8 @@ struct CameraInfo : public osg::Referenced
camera. */
FIXED_NEAR_FAR = 0x20, /**< take the near far values in the
projection for real. */
- ENABLE_MASTER_ZOOM = 0x40 /**< Can apply the zoom algorithm. */
+ ENABLE_MASTER_ZOOM = 0x40, /**< Can apply the zoom algorithm. */
+ VR_MIRROR = 0x80 /**< Switch to a mirror of VR. */
};
CameraInfo(unsigned flags_) :
@@ -224,6 +225,13 @@ protected:
float _zFar;
float _nearField;
+ /** Create a compositor for a VR mirror.
+ * @param gc the graphics context to use.
+ * @param viewport the viewport to render to.
+ * @return a new compositor or nullptr if no VR mirror is needed.
+ */
+ simgear::compositor::Compositor *buildVRMirrorCompositor(osg::GraphicsContext *gc,
+ osg::Viewport *viewport);
/** Build a complete CameraGroup from a property node.
* @param viewer the viewer associated with this camera group.
* @param wbuilder the window builder to be used for this camera group.
diff --git a/src/Viewer/VRManager.cxx b/src/Viewer/VRManager.cxx
index 6da3b72d8..5159614b3 100644
--- a/src/Viewer/VRManager.cxx
+++ b/src/Viewer/VRManager.cxx
@@ -232,6 +232,24 @@ void VRManager::doDestroyView(osgXR::View *xrView)
}
}
+void VRManager::onRunning()
+{
+ // Reload compositors to trigger switch to mirror of VR
+ CameraGroup *cgroup = CameraGroup::getDefault();
+ reloadCompositors(cgroup);
+}
+
+void VRManager::onStopped()
+{
+ // As long as we're not in the process of destroying FlightGear, reload
+ // compositors to trigger switch away from mirror of VR
+ if (!isDestroying())
+ {
+ CameraGroup *cgroup = CameraGroup::getDefault();
+ reloadCompositors(cgroup);
+ }
+}
+
void VRManager::preReloadCompositor(CameraGroup *cgroup, CameraInfo *info)
{
osgXR::View *xrView = _xrViews[info];
diff --git a/src/Viewer/VRManager.hxx b/src/Viewer/VRManager.hxx
index 6c1c61020..71694a1bf 100644
--- a/src/Viewer/VRManager.hxx
+++ b/src/Viewer/VRManager.hxx
@@ -90,6 +90,9 @@ class VRManager : public osgXR::Manager
void doCreateView(osgXR::View *xrView) override;
void doDestroyView(osgXR::View *xrView) override;
+ void onRunning() override;
+ void onStopped() override;
+
void preReloadCompositor(CameraGroup *cgroup, CameraInfo *info);
void postReloadCompositor(CameraGroup *cgroup, CameraInfo *info);